An automatic welding fixture for photovoltaic inverter chassis

Abstract

The present invention relates to the field of solar energy application technology, and specifically to an automatic welding fixture for a photovoltaic inverter chassis; it comprises a base plate and a limit block, the upper end surface of the base plate is clamped with two groups of first transverse rods, the two groups of first transverse rods are hinged with a support plate through a first support rod, the support plate is also hinged with a first longitudinal rod through a second support rod, the bottom end of the support plate is fixedly connected to a power device through a connecting rod, and the upper end surface of the base plate is slidably matched with two groups of second transverse rods parallel to the first transverse rods; the present invention realizes edge clamping of the photovoltaic inverter chassis by arranging two groups of clamping rods, and the two groups of clamping devices can cope with two placement positions of the photovoltaic inverter chassis, thereby effectively improving the welding clamping efficiency of the photovoltaic inverter chassis, and then effectively reducing the bending deformation of the photovoltaic inverter chassis by arranging the limit block and cooperating with the two groups of clamping devices, that is, effectively reducing the risk of fracture at the welding part of the photovoltaic inverter chassis.

Description

Technical Field

[0001] The present invention relates to the technical field of solar energy application, and in particular to an automatic welding fixture for a photovoltaic inverter chassis. Background Art

[0002] Photovoltaic inverters convert the variable DC voltage generated by photovoltaic solar panels into AC power at mains frequency, which can be fed back into commercial power transmission systems or used by off-grid power grids. Photovoltaic inverters are a key component in PV array systems and can be used with conventional AC-powered equipment. Solar inverters have special features for PV arrays, such as maximum power point tracking and islanding protection.

[0003] During manufacturing, the chassis of photovoltaic inverters are generally made of aluminum alloy, and some are also made of stainless steel. In the manufacturing process, some parts of the inverter chassis need to be welded. The industrial development of modern society has made this fixed welding mostly completed by automatic welding by robotic arms, which greatly reduces the workload of workers, improves work efficiency, and reduces the risk of welders suffering from work-related illnesses, such as eye diseases. During welding, the welded parts need to be fixed and clamped. For this part of the work, the existing production line also uses PLC-controlled clamping tools to clamp, which undoubtedly further improves work efficiency and makes the manufacturing of photovoltaic inverter chassis more standardized.

[0004] However, in actual use, in order to make the chassis of the photovoltaic inverter light, the side walls of the chassis are basically not very thick when the chassis is made. During welding, it is also necessary to pay attention to the welding temperature and time to prevent the chassis from being welded through. It is even more necessary to limit the flatness of the welding parts during welding, because the high temperature generated by welding, if it is acted upon by external forces at the welding parts at this time, the welding parts will bend and deform. The thin side walls of the chassis will make this phenomenon more serious, and the high temperature of welding will cause thermal expansion of the welding parts. The thinner the thermal expansion, the more obvious it is. When the thin wall cools, the expanded part will shrink. If the weld metal has poor tensile properties, it will break. If the thin wall bends, the fracture will further expand, which not only reduces the welding efficiency, but also reduces the production quality of the photovoltaic inverter chassis, further reducing the service life of the photovoltaic inverter. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides an automatic welding fixture for a photovoltaic inverter chassis.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions

[0007] The present invention provides an automatic welding fixture for a photovoltaic inverter chassis, comprising a base plate and a limit block, wherein the upper end surface of the base plate is clamped with two groups of first transverse rods, and the two groups of first transverse rods are hinged to a support plate through a first support rod, and the support plate is also hinged to a first longitudinal rod through a second support rod, and the bottom end of the support plate is fixedly connected to a power device through a connecting rod, and the upper end surface of the base plate is slidably matched with two groups of second transverse rods parallel to the first transverse rods, and the upper end surface of the base plate is slidably matched with two groups of second longitudinal rods parallel to the first longitudinal rods, and the opposite surfaces of the second transverse rods and the second longitudinal rods are fixedly connected to the limit block, and the second transverse rods and the second longitudinal rods are both clamped with the power device.

[0008] Furthermore, a first groove is provided on the upper end surface of the base plate, and the first groove is frictionally fitted with the first transverse rod, the second transverse rod, the first longitudinal rod and the second longitudinal rod. The connecting rod is interference fitted with a gear, and the second transverse rod and the second longitudinal rod are both engaged with the gear. By setting the first groove, when the photovoltaic inverter chassis is placed on the base plate by the robot, it is limited within a certain range, and by setting the gears, the movement effect of the power device on other components is achieved.

[0009] Furthermore, a first through hole is formed in the first groove, and the first through hole is slidably matched with the connecting rod; by providing the first through hole, a fixed connection between the power device and the support plate is achieved.

[0010] Furthermore, the support plate is provided with a second groove, a first support rod is hinged in the second groove through a first hinge, the lower end surface of the support plate is hinged to the second support rod through a second hinge, and the first hinge and the second hinge are both arranged at the edge of the support plate; by setting the second groove and the first hinge and the second hinge, preferably the first support rod is hinged to the first transverse rod, and the second support rod is hinged to the first longitudinal rod, thereby realizing the extension and retraction of the first transverse rod and the first longitudinal rod by rotating the support plate.

[0011] Furthermore, two groups of third grooves and two groups of fourth grooves are provided in the first groove, the two groups of third grooves and the fourth grooves are perpendicular to each other, the two groups of third grooves are slidably fitted with the second transverse rod, and the two groups of fourth grooves are slidably fitted with the second longitudinal rod; by setting the third groove and the fourth groove, the sliding fit of the second transverse rod and the bottom plate, and the sliding fit of the second longitudinal rod and the bottom plate are achieved.

[0012] Furthermore, a first slider is slidably fitted in the two groups of the third grooves, the first slider is fixedly connected to the bottom surface of the second transverse rod, and the first slider is clamped with the connecting rod through a first limit bar; by setting the first slider, preferably the first slider is provided with a limit block, so that the first slider will not disengage from the third groove, thereby realizing the sliding fit of the second transverse rod and the bottom plate, and then by setting the first limit bar, preferably the connecting rod is provided with a limit groove, so that the first limit bar runs along the track and limits the first limit bar from disengaging.

[0013] Furthermore, the first limit bar is provided with a first gear tooth near the end face of the connecting rod, and the first gear tooth is engaged with the gear; by providing the first gear tooth, the sliding of the second transverse rod and the base plate can be controlled by the power device, and the power device also controls the movement of the first transverse rod, thereby achieving the clamping effect of the two transverse rods on the chassis wall.

[0014] Furthermore, a second slider is slidably fitted in the two groups of the fourth grooves, the second slider is fixedly connected to the bottom surface of the second longitudinal rod, and the second slider is clamped with the connecting rod through a second limit bar; by setting the second slider, preferably the second slider is provided with a limit block, so that the second slider will not disengage from the fourth groove, thereby realizing the sliding fit of the second longitudinal rod and the bottom plate, and then by setting the second limit bar, the connecting rod is provided with a limit groove matching therewith, so that the second limit bar moves along the track and limits the second limit bar from disengaging.

[0015] Furthermore, the second limit bar is provided with a second gear tooth near the end face of the connecting rod, and the second gear tooth is engaged with the gear; by providing the second gear tooth, the sliding of the second longitudinal rod and the base plate can be controlled by the power device, and the power device also controls the movement of the first longitudinal rod, thereby achieving the clamping effect of the two longitudinal rods on the chassis wall.

[0016] Furthermore, the height of the limit block is consistent with the height of the support plate, the first transverse rod and the first longitudinal rod, and the height of the second transverse rod and the second longitudinal rod are both greater than the height of the limit block; by setting the height of the limit block, when the opening of the photovoltaic inverter chassis is placed downward, the limit block contacts the outer wall of the photovoltaic inverter chassis, and the first transverse rod and the first longitudinal rod contact the inner wall of the photovoltaic inverter chassis, thereby achieving the clamping effect of the device on the photovoltaic inverter chassis, and the side wall of the photovoltaic inverter chassis will not bend during clamping, thereby effectively reducing the damage caused by light The welding fracture caused by the bending of the side wall of the photovoltaic inverter chassis. When the photovoltaic inverter chassis is placed with the opening facing upward, the first transverse bar and the first longitudinal bar support the photovoltaic inverter chassis, while the second transverse bar and the second longitudinal bar clamp the lower end of the photovoltaic inverter chassis. At this time, the limit block will gradually approach the first transverse bar and the first longitudinal bar, thereby limiting the second transverse bar and the second longitudinal bar from excessively clamping the outer wall of the photovoltaic inverter chassis, thereby effectively reducing the bending deformation of the bottom end and side walls of the photovoltaic inverter chassis, that is, effectively reducing the risk of fracture at the welding point of the photovoltaic inverter chassis.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention realizes edge clamping of the photovoltaic inverter chassis by arranging two sets of clamping rods, and the two sets of clamping devices can cope with two placement positions of the photovoltaic inverter chassis, thereby effectively improving the welding clamping efficiency of the photovoltaic inverter chassis, and then effectively reducing the bending deformation of the bottom end and side walls of the photovoltaic inverter chassis by arranging a limit block and cooperating with the two sets of clamping devices, that is, effectively reducing the risk of fracture at the welding point of the photovoltaic inverter chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle;

[0022] Figure 3 It is a schematic diagram of the overall top view of the structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the overall front cross-sectional structure of the present invention;

[0024] Figure 5 This is a schematic structural diagram of the outer wall clamping tool of the present invention;

[0025] Figure 6 It is a schematic diagram of the power device and support plate structure of the present invention;

[0026] Figure 7 This is a diagram of the clamping state of the chassis of the present invention when the chassis opening is facing upward;

[0027] Figure 8 This is a diagram of the clamping state of the chassis of the present invention when the chassis opening is facing downward;

[0028] The numbers in the figure represent: 1. base plate; 2. limit block; 3. first transverse rod; 4. first support rod; 5. support plate; 6. first longitudinal rod; 7. connecting rod; 8. power unit; 9. second transverse rod; 10. second longitudinal rod; 11. first groove; 12. first through hole; 13. second groove; 14. first hinge shaft; 15. second hinge shaft; 16. third groove; 17. fourth groove; 18. first slider; 19. first limit strip; 20. first gear tooth; 21. gear; 22. second slider; 23. second limit strip; 24. second gear tooth; 25. second support rod. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below with reference to the accompanying drawings.

[0030] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0031] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limiting the present invention.

[0032] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0033] The present invention provides an automatic welding fixture for a photovoltaic inverter chassis, referring to Figure 1-8 , including a base plate 1 and a limit block 2, preferably the base plate 1 is made of metal, and the base plate 1 is fixedly connected to the installation plane, preferably the limit block 2 is made of non-slip rubber, thereby protecting the outer wall of the photovoltaic inverter chassis from scratches, and the upper end surface of the base plate 1 is clamped with two groups of first transverse rods 3, and the two groups of first transverse rods 3 are hinged with a support plate 5 through a first support rod 4, and the support plate 5 is also hinged with a first longitudinal rod 6 through a second support rod 25. Preferably, the outer side walls of the first transverse rod 3 and the first longitudinal rod 6 are provided with non-slip rubber, thereby ensuring that the inner wall of the photovoltaic inverter chassis is reduced in damage, and the bottom end of the support plate 5 is fixedly connected to a power device 8 through a connecting rod 7, and the power device 8 is preferably a servo motor. The upper end surface of the base plate 1 is slidably matched with two groups of second transverse rods 9 parallel to the first transverse rods 3, and the upper end surface of the base plate 1 is slidably matched There are two groups of second longitudinal bars 10 parallel to the first longitudinal bars 6. Preferably, the inner outer walls of the second transverse bars 9 and the second longitudinal bars 10 are provided with anti-slip rubber to protect the outer wall of the photovoltaic inverter case. The opposing surfaces of the second transverse bars 9 and the second longitudinal bars 10 are fixedly connected to the limit blocks 2. The second transverse bars 9 and the second longitudinal bars 10 are both clamped with the power device 8. By setting up two groups of identical clamping devices, when the device clamps the photovoltaic inverter case and then welds various components, the photovoltaic inverter case is not removed immediately. Instead, a second photovoltaic inverter case is placed on it and then removed. At this time, the temperature at the welding point is reduced, thereby effectively reducing the deformation and bending caused by metal heating, thereby effectively improving the quality and efficiency of the photovoltaic inverter case welding.

[0034] Among them, reference Figure 1-8 The upper end surface of the base plate 1 is provided with a first groove 11, and the first groove 11 is frictionally matched with the first transverse rod 3, the second transverse rod 9, the first longitudinal rod 6 and the second longitudinal rod 10. The connecting rod 7 is interference-fitted with a gear 21, and the second transverse rod 9 and the second longitudinal rod 10 are both engaged with the gear 21; by providing the first groove 11, when the photovoltaic inverter chassis is placed on the base plate 1 by the manipulator, it is limited within a certain range, and then by providing the gear 21, the movement effect of the power device 8 on other components is realized, and a first through hole 12 begins to be provided in the first groove 11, and the first through hole 12 is slidably matched with the connecting rod 7; by providing the first through hole 12, a fixed connection between the power device 8 and the support plate 5 is achieved.

[0035] Among them, reference Figure 1-8The support plate 5 is provided with a second groove 13, and the first support rod 4 is hingedly connected to the second support rod 4 through the first hinge shaft 14 in the second groove 13. The lower end surface of the support plate 5 is hingedly connected to the second support rod 25 through the second hinge shaft 15. The first hinge shaft 14 and the second hinge shaft 15 are both arranged at the edge of the support plate 5; by setting the second groove 13 and the first hinge shaft 14 and the second hinge shaft 15, preferably the first support rod 4 is hinged to the first transverse rod 3, and the second support rod 25 is hinged to the first longitudinal rod 6, so that the first transverse rod 3 and the first longitudinal rod 6 can be extended and retracted by rotating the support plate 5. Two groups of third grooves 16 and two groups of fourth grooves 17 are provided in the first groove 11, and the two groups of third grooves 16 and the fourth grooves 17 are perpendicular to each other. The two groups of third grooves 16 and the second transverse rod 9 slide in cooperation, and the two groups of fourth grooves 17 slide in cooperation with the second longitudinal rod 10; by setting the third groove 16 and the fourth groove 17, the sliding cooperation of the second transverse rod 9 and the bottom plate 1, and the sliding cooperation of the second longitudinal rod 10 and the bottom plate 1 are realized.

[0036] Among them, reference Figure 1-8 , a first slider 18 is slidably fitted in the two groups of third grooves 16, and the first slider 18 is fixedly connected to the bottom surface of the second transverse rod 9, and the first slider 18 is engaged with the connecting rod 7 through a first limit bar 19; by setting the first slider 18, preferably the first slider 18 is provided with a limit block, so that the first slider 18 will not disengage from the third groove 16, thereby realizing the sliding fit of the second transverse rod 9 and the bottom plate 1, and then by setting the first limit bar 19, preferably a limit groove is provided at the connecting rod 7, so that the first limit bar 19 runs along the track and limits the first limit bar 19 from disengaging, and the first limit bar 19 is provided with a first gear tooth 20 near the end surface of the connecting rod 7, and the first gear tooth 20 is meshed with the gear 21; by setting the first gear tooth 20, the sliding of the second transverse rod 9 and the bottom plate 1 is controlled by the power device 8, and the power device 8 also controls the movement of the first transverse rod 3, thereby realizing the clamping effect of the two transverse rods on the chassis wall.

[0037] Among them, reference Figure 1-8, a second slider 22 is slidably fitted in the two groups of fourth grooves 17, and the second slider 22 is fixedly connected to the bottom surface of the second longitudinal rod 10, and the second slider 22 is engaged with the connecting rod 7 through the second limit bar 23; by setting the second slider 22, preferably the second slider 22 is provided with a limit block, so that the second slider 22 will not disengage from the fourth groove 17, thereby realizing the sliding cooperation between the second longitudinal rod 10 and the bottom plate 1, and then by setting the second limit bar 23, the connecting rod 7 is provided with a limit groove cooperating therewith, so that the second limit bar 23 moves along the track and limits the second limit bar 23 from disengaging, and the second limit bar 23 is provided with a second gear tooth 24 near the end surface of the connecting rod 7, and the second gear tooth 24 is meshed with the gear 21; by setting the second gear tooth 24, the sliding of the second longitudinal rod 10 and the bottom plate 1 is controlled by the power device 8, and the power device 8 also controls the movement of the first longitudinal rod 6, thereby realizing the clamping effect of the two longitudinal rods on the chassis wall.

[0038] Among them, reference Figure 1-8 , the height of the limit block 2 is consistent with the height of the support plate 5, the first transverse rod 3 and the first longitudinal rod 6, and the height of the second transverse rod 9 and the height of the second longitudinal rod 10 are both greater than the height of the limit block 2; by setting the height of the limit block 2, when the photovoltaic inverter chassis is placed with the opening facing downward, the limit block 2 contacts the outer wall of the photovoltaic inverter chassis, and the first transverse rod 3 and the first longitudinal rod 6 contact the inner wall of the photovoltaic inverter chassis, thereby achieving the clamping effect of the photovoltaic inverter chassis by the device, and the side wall of the photovoltaic inverter chassis will not bend during clamping, thereby effectively reducing the risk of damage caused by the photovoltaic inverter. The welding fracture caused by the bending of the side wall of the chassis. When the photovoltaic inverter chassis is placed with the opening facing upward, the first transverse bar 3 and the first longitudinal bar 6 support the photovoltaic inverter chassis, while the second transverse bar 9 and the second longitudinal bar 10 clamp the lower end of the photovoltaic inverter chassis. At this time, the limit block 2 will gradually approach the first transverse bar 3 and the first longitudinal bar 6, thereby limiting the second transverse bar 9 and the second longitudinal bar 10 from excessively clamping the outer wall of the photovoltaic inverter chassis, thereby effectively reducing the bending deformation of the bottom end and side walls of the photovoltaic inverter chassis, that is, effectively reducing the risk of fracture at the welding point of the photovoltaic inverter chassis.

[0039] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. An automatic welding fixture for a photovoltaic inverter chassis, comprising a base plate (1) and a limit block (2), characterized in that: The upper end surface of the base plate (1) is clamped with two groups of first transverse rods (3), and the two groups of the first transverse rods (3) are hinged to a support plate (5) through a first support rod (4). The support plate (5) is also hinged to a first longitudinal rod (6) through a second support rod (25). The bottom end of the support plate (5) is fixedly connected to a power device (8) through a connecting rod (7). The upper end surface of the base plate (1) is slidably matched with two groups of second transverse rods (9) parallel to the first transverse rods (3). The upper end surface of the base plate (1) is slidably matched with two groups of second longitudinal rods (10) parallel to the first longitudinal rods (6). The mutually opposite surfaces of the second transverse rods (9) and the second longitudinal rods (10) are fixedly connected to the limiting block (2). The second transverse rods (9) and the second longitudinal rods (10) are clamped with the power device (8). The upper end surface of the bottom plate (1) is provided with a first groove (11), the first groove (11) is friction-fitted with the first transverse rod (3), the second transverse rod (9), the first longitudinal rod (6) and the second longitudinal rod (10), the connecting rod (7) is interference-fitted with a gear (21), and the second transverse rod (9) and the second longitudinal rod (10) are both meshed with the gear (21); A first through hole (12) is initially formed in the first groove (11), and the first through hole (12) is slidably engaged with the connecting rod (7); The support plate (5) is provided with a second groove (13), a first support rod (4) is hingedly connected in the second groove (13) via a first hinge shaft (14), a lower end surface of the support plate (5) is hingedly connected to a second support rod (25) via a second hinge shaft (15), and the first hinge shaft (14) and the second hinge shaft (15) are both arranged at the edge of the support plate (5); The height of the limit block (2) is consistent with the height of the support plate (5), the first transverse rod (3) and the first longitudinal rod (6), and the height of the second transverse rod (9) and the height of the second longitudinal rod (10) are both greater than the height of the limit block (2).

2. The automatic welding fixture for a photovoltaic inverter chassis according to claim 1, characterized in that: Two groups of third grooves (16) and two groups of fourth grooves (17) are provided in the first groove (11). The two groups of third grooves (16) and the fourth grooves (17) are perpendicular to each other. The two groups of third grooves (16) are slidably matched with the second transverse rod (9), and the two groups of fourth grooves (17) are slidably matched with the second longitudinal rod (10).

3. The automatic welding fixture for a photovoltaic inverter chassis according to claim 2, characterized in that: A first slider (18) is slidably fitted in the two groups of the third grooves (16). The first slider (18) is fixedly connected to the bottom surface of the second transverse rod (9). The first slider (18) is clamped to the connecting rod (7) via a first limiting strip (19).

4. The automatic welding fixture for a photovoltaic inverter chassis according to claim 3, characterized in that: The first limiting strip (19) is provided with a first gear tooth (20) on the end surface close to the connecting rod (7), and the first gear tooth (20) is meshed with the gear (21).

5. The automatic welding fixture for a photovoltaic inverter chassis according to claim 3, characterized in that: A second slider (22) is slidably fitted in the two groups of the fourth grooves (17), the second slider (22) is fixedly connected to the bottom surface of the second longitudinal rod (10), and the second slider (22) is clamped to the connecting rod (7) via a second limiting strip (23).

6. The automatic welding fixture for a photovoltaic inverter chassis according to claim 5, characterized in that: The second limiting strip (23) is provided with a second gear tooth (24) near the end surface of the connecting rod (7), and the second gear tooth (24) is meshed with the gear (21).

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