Automatic welding device for string inverter

Abstract

The utility model relates to the technical field of string inverter processing equipment, in particular to a string inverter automatic welding device which comprises a back plate, a clamping force detection mechanism and a semi-closed adsorption mechanism, the back plate is fixed on a supporting bottom frame, a control unit is fixedly installed on the edge of one side of the back plate, and the clamping force detection mechanism is fixed on the semi-closed adsorption mechanism. A center positioning mechanism is arranged at the bottom of the side, provided with the control unit, of the back plate. The supporting spring and the clamping plate are additionally arranged on the bottom support, meanwhile, the clamping plate which is elastically supported is limited in a sliding mode through the limiting rod, the parallelism between the clamping plate and the top support is guaranteed, the bottom support is driven by the longitudinal clamping mechanism to move, and therefore the clamping plate can be clamped conveniently. When the clamping plate is in contact with the workpiece, the pressure test plate collects the clamping pressure and transmits the pressure to the lifting sliding block through the supporting spring at the same time, so that the pressure change is slowed down in an elastic connection mode, and the damage to the workpiece or equipment caused by the multiplication change of the pressure after the rigid transmission clamping is in contact with the workpiece is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of string inverter processing equipment, specifically an automatic welding device for string inverters. Background Technology

[0002] String inverters are key equipment in photovoltaic power generation systems. They are mainly used to convert the direct current generated by solar panels into alternating current to meet the needs of the power grid or load. Photovoltaic modules are connected in series to form "strings", and multiple strings are connected in parallel to the inverter to meet specific needs. During the manufacturing process of string inverters, welding equipment is required to weld the components.

[0003] To address the welding problem of string inverters, Chinese Patent Publication No. CN222552527U discloses an automatic welding device for string inverters, including a back plate. A welding gun is provided on the front of the back plate, and a base is installed at the bottom of the back plate. Two processing parts are attached to the front of the back plate, and a positioning mechanism is provided on the front of the back plate. The positioning mechanism includes a vertical plate, a baffle, a sleeve, a horizontal plate, a housing, a double-ended stud, and a slider. The back of the housing is fixedly connected to the front of the back plate, and two sliders are slidably engaged on the inner side of the housing. The upper part of the outer wall of the two sliders is movably connected to the top through hole of the housing. A vertical plate is fixedly connected to the top of the slider, and a sleeve is movably connected to a groove on one side of the vertical plate. A horizontal plate is fixedly connected to one side of the sleeve, and a baffle fixedly connected to the outer side of the vertical plate is attached to the top of the processing parts.

[0004] The aforementioned automatic welding device for string inverters monitors pressure changes in the clamping structure through the cooperation of a horizontal plate, a pressure plate, and a pressure sensor, preventing excessive pressure from deforming the workpiece and achieving automatic fixation. However, the motor-driven clamping method is limited by the structure itself, causing the clamping distance to change linearly with the rotation. Furthermore, because the rigid structure of the welded part does not deform, the clamping pressure increases exponentially with the contact parts, leading to unstable pressure detection and potential irreversible damage to the structure. Additionally, the gas welding structure in the aforementioned utility model is in an open environment, where harmful gases generated during high-temperature welding can directly diffuse into the air, affecting the health of workers. Therefore, we propose an automatic welding device for string inverters. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides an automatic welding device for string inverters, comprising a backplate, a central positioning mechanism, a longitudinal clamping mechanism, a welding mechanism, a clamping force detection mechanism, and a semi-enclosed adsorption mechanism. The backplate is fixed to a support base, and a control unit is fixedly installed on one edge of the backplate. A central positioning mechanism is provided at the bottom of the side of the backplate where the control unit is installed. The longitudinal clamping mechanisms are symmetrically arranged on the central positioning mechanism and are slidably connected to the backplate. A clamping force detection mechanism is provided on the longitudinal clamping mechanism. A welding mechanism is provided on the side of the backplate away from the control unit, and a semi-enclosed adsorption mechanism is provided on the welding mechanism.

[0006] In some embodiments, the central positioning mechanism comprises a positioning bracket, a double-ended stud, a positioning motor, and a positioning slider. The positioning bracket is fixed to a back plate. The double-ended stud is rotatably connected to the positioning bracket via a bearing. Positioning sliders are symmetrically arranged on the double-ended stud. The positioning sliders are threadedly connected to the double-ended stud. A positioning motor is fixedly installed at one end of the positioning bracket. The output end of the positioning motor passes through the positioning bracket and is fixedly connected to one end of the double-ended stud.

[0007] In some embodiments, the longitudinal clamping mechanism comprises a longitudinal support, a lifting slider, a lifting motor, a lifting screw, a top support, and a bottom support. The bottom of the longitudinal support is fixedly connected to the positioning slider. The lifting screw is rotatably connected to the longitudinal support via bearings. The lifting slider is provided on the lifting screw. The lifting slider is connected to the lifting screw through an internally embedded ball nut.

[0008] In some embodiments, a top bracket is fixedly connected to the top of one side of the longitudinal bracket, a bottom bracket is slidably connected to the longitudinal bracket, the bottom bracket is fixed to the lifting slider, a lifting motor is fixedly installed at the top of the longitudinal bracket, and the output end of the lifting motor passes through the top of the lifting screw fixedly connected to the longitudinal bracket.

[0009] In some embodiments, the welding mechanism comprises a feed drive mechanism, a mounting frame, an electric slide bar, an electric slider, and a welding head. The feed drive mechanism is symmetrically arranged on the side of the back plate away from the control unit. The mounting frame is mounted on the feed drive mechanism. An electric slide bar is provided in the mounting frame. An electric slider is provided on the electric slide bar. A welding head is provided on the electric slider.

[0010] In some embodiments, the clamping force detection mechanism comprises a limiting rod, a support spring, a clamping plate, a pressure test plate, a locking hydraulic cylinder, and a locking block. The limiting rod is slidably connected in symmetrically opened through holes on the bottom bracket. The bottom bracket is fixed on the lifting slider, and the lifting slider is connected to the lifting screw through internally embedded ball nuts. A support spring is provided at the top of the bottom bracket, and the top end of the support spring is fixed to the bottom of the clamping plate. The top end of the limiting rod passes through the support spring and is fixed to the clamping plate. A pressure test plate is provided at the top of the clamping plate. The locking hydraulic cylinder is fixedly installed at the bottom of the bottom bracket, and the output end of the locking hydraulic cylinder passes through the bottom bracket and is fixedly connected to the locking block.

[0011] In some embodiments, the semi-enclosed adsorption mechanism comprises a top motor, a brush wheel, a covering frame, a hose, a push cylinder, an air pump, and a purification shell. The top motor is symmetrically mounted on the top of one side of the electric slider. The output end of the top motor is fixedly connected to the brush wheel. A push cylinder is provided at the bottom of one side of the electric slider. The output end of the push cylinder is fixedly connected to the covering frame. A hose is sleeved in a through groove on the covering frame. One end of the hose is fixed to the air pump. The air pump is fixed on the other side of the electric slider. A purification shell is provided on the air pump. A filter screen and activated carbon are arranged in the purification shell. The purification shell is interconnected with the output end of the air pump.

[0012] This utility model has at least the following beneficial effects:

[0013] 1. This utility model adds a support spring and a clamping plate to the bottom bracket. During the upward movement of the clamping plate, it can cooperate with the top bracket to achieve the clamping action. At the same time, the elastically supported clamping plate is slidably limited by the limiting rod to ensure the parallelism between the clamping plate and the top bracket. The bottom bracket is fixed on the lifting slider and moves under the drive of the longitudinal clamping mechanism. When the clamping plate contacts the workpiece, the pressure test plate collects the clamping pressure and transmits the pressure to the lifting slider through the support spring. In this way, the pressure change is slowed down by the elastic connection, avoiding damage to the workpiece or equipment caused by the multiplied pressure change after contact with the workpiece due to rigid transmission clamping.

[0014] 2. After pressure monitoring is completed, the locking block is pushed upward by the locking hydraulic cylinder and pressed against the bottom of the clamping plate to limit the clamping plate and restrict the continued contraction of the support spring, thus ensuring the stability of clamping.

[0015] 3. This utility model adds a top motor and brush wheel to the electric slider as a cleaning structure for the welding surface, and simultaneously adds a semi-enclosed structure composed of a push cylinder and a covering frame. As the welding head moves upward with the electric slider, the brush wheel cleans the welding area first to ensure welding quality. At the same time as the welding head is welding, the air pump generates negative pressure in the covering frame, drawing the welding gas into the hose and through the purification shell for discharge. During the process, the filter screen and activated carbon in the purification shell are used to treat the toxic gas, protecting the health of the surrounding workers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0018] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0019] Figure 4 This is a partial structural schematic diagram of Embodiment 2 of the present invention.

[0020] In the diagram: 1-Backplate; 2-Center positioning mechanism; 3-Longitudinal clamping mechanism; 4-Welding mechanism; 5-Clamping force detection mechanism; 6-Semi-enclosed adsorption mechanism; 7-Supporting base frame; 8-Control unit; 21-Positioning bracket; 22-Double-ended stud; 23-Positioning motor; 24-Positioning slider; 31-Longitudinal bracket; 33-Lifting motor; 34-Lifting screw; 35-Lifting slider; 36-Top bracket; 37-Bottom bracket; 41-Feed drive Mechanism; 42-Mounting frame; 43-Electric slide bar; 44-Electric slider; 45-Welding head; 51-Limit rod; 52-Support spring; 53-Clamping plate; 54-Pressure test plate; 55-Locking hydraulic cylinder; 56-Locking block; 61-Top motor; 62-Brush wheel; 63-Covering frame; 64-Hose; 65-Push-up cylinder; 66-Air pump; 67-Purification shell; 101-Fixing clamping plate; 102-Clamping screw; 103-Adjusting clamping plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1:

[0023] Please see Figure 1-3 This utility model provides a technical solution: an automatic welding device for string inverters, including a back plate 1, a central positioning mechanism 2, a longitudinal clamping mechanism 3, a welding mechanism 4, a clamping force detection mechanism 5, and a semi-enclosed adsorption mechanism 6. The back plate 1 is fixed on a support base 7. A control unit 8 is fixedly installed on one edge of the back plate 1. A central positioning mechanism 2 is provided at the bottom of the side of the back plate 1 where the control unit 8 is installed. A longitudinal clamping mechanism 3 is symmetrically arranged on the central positioning mechanism 2. The longitudinal clamping mechanism 3 is slidably connected to the back plate 1. A clamping force detection mechanism 5 is provided on the longitudinal clamping mechanism 3. A welding mechanism 4 is provided on the side of the back plate 1 away from the control unit 8. A semi-enclosed adsorption mechanism 6 is provided on the welding mechanism 4. The control unit 8 serves as the control drive for the entire device, controlling the electrical structures connected to the central positioning mechanism 2, the longitudinal clamping mechanism 3, the welding mechanism 4, the clamping force detection mechanism 5, and the semi-enclosed adsorption mechanism 6, thereby assisting in the synchronous operation of the entire device.

[0024] The center positioning mechanism 2 consists of a positioning bracket 21, a double-ended stud 22, a positioning motor 23, and a positioning slider 24. The positioning bracket 21 is fixed on the back plate 1. The double-ended stud 22 is rotatably connected to the positioning bracket 21 through a bearing. The positioning slider 24 is symmetrically arranged on the double-ended stud 22. The positioning slider 24 is connected to the double-ended stud 22 through a threaded connection. The positioning motor 23 is fixedly installed at one end of the positioning bracket 21. The output end of the positioning motor 23 passes through the positioning bracket 21 and is fixedly connected to one end of the double-ended stud 22. The positioning sliders 24 symmetrically arranged on the double-ended stud 22 are located on threads with different directions at both ends. Thus, during the rotation of the double-ended stud 22 driven by the positioning motor 23, the positioning sliders 24 on both sides can move closer or further away synchronously. In combination with the longitudinal clamping mechanism 3 connected to the positioning sliders 24, the center positioning effect of the two workpieces on the left and right is achieved.

[0025] The longitudinal clamping mechanism 3 consists of a longitudinal support 31, a lifting slider 35, a lifting motor 33, a lifting screw 34, a top support 36, and a bottom support 37. The bottom of the longitudinal support 31 is fixedly connected to the positioning slider 24. The lifting screw 34 is rotatably connected to the longitudinal support 31 via bearings. The lifting slider 35 is mounted on the lifting screw 34 and is connected to the lifting screw 34 via internally embedded ball nuts. The top support 36 is fixedly connected to one side of the top of the longitudinal support 31, and the bottom support 37 is slidably connected to the longitudinal support 31. The bottom bracket 37 is fixed on the lifting slider 35. The top of the longitudinal bracket 31 is fixedly mounted with a lifting motor 33. The output end of the lifting motor 33 passes through the longitudinal bracket 31 and is fixedly connected to the top of the lifting screw 34. The longitudinal bracket 31 is slidably connected to the back plate 1 and moves closer or further away from each other as the positioning slider 24 moves. During the process of the lifting motor 33 driving the lifting screw 34 to rotate, the bottom bracket 37 on the lifting slider 35 can be raised or lowered by the cooperation of the lifting screw 34 and the lifting slider 35, thereby adjusting the distance between the bottom bracket 37 and the top bracket 36 to achieve longitudinal clamping.

[0026] The welding mechanism 4 consists of a feed drive mechanism 41, a mounting frame 42, an electric slide bar 43, an electric slider 44, and a welding head 45. The feed drive mechanism 41 is symmetrically arranged on the side of the back plate 1 away from the control unit 8. The mounting frame 42 is mounted on the feed drive mechanism 41. The mounting frame 42 is provided with an electric slide bar 43, an electric slider 44 is provided on the electric slide bar 43, and a welding head 45 is provided on the electric slider 44. The feed drive mechanism 41 is used to drive the mounting frame 42 to move closer to or away from the back plate 1. During the welding process, the front end of the back plate 1 clamps the processing part. The clamped welding part is welded by the welding head 45 on the electric slider 44. At the same time, the welding head 45 is slidably connected to the electric slide bar 43 through the electric slider 44, which facilitates the adjustment of its processing height.

[0027] The clamping force detection mechanism 5 consists of a limit rod 51, a support spring 52, a clamping plate 53, a pressure testing plate 54, a locking hydraulic cylinder 55, and a locking block 56. The limit rod 51 is slidably connected in symmetrically opened through holes on the bottom bracket 37. The bottom bracket 37 is fixed on the lifting slider 35, which is connected to the lifting screw 34 through internally embedded ball nuts. The top of the bottom bracket 37 is provided with a support spring 52, the top of which is fixed to the bottom of the clamping plate 53. The top of the limit rod 51 passes through the support spring 52 and is fixed to the clamping plate 53. The top of the clamping plate 53 is provided with a pressure testing plate 54. The locking hydraulic cylinder 55 is fixedly installed on the bottom of the bottom bracket 37, and the output end of the locking hydraulic cylinder 55 passes through the bottom bracket 37 and is fixedly connected to the locking block 56. The support spring 52 and the clamping plate 56 are added to the bottom bracket 37. 3. During the upward movement of the clamping plate 53, the clamping action can be achieved in conjunction with the top bracket 36. At the same time, the elastically supported clamping plate 53 is slidably limited by the limiting rod 51 to ensure the parallelism between the clamping plate 53 and the top bracket 36. The bottom bracket 37 is fixed on the lifting slider 35 and moves under the drive of the longitudinal clamping mechanism 3. When the clamping plate 53 contacts the workpiece, the pressure test plate 54 collects the clamping pressure and transmits the pressure to the lifting slider 35 through the support spring 52. In this way, the pressure change is slowed down by the elastic connection, avoiding damage to the workpiece or equipment caused by the multiplication of pressure changes after contact with the workpiece due to rigid transmission clamping. After the pressure monitoring is completed, the locking hydraulic cylinder 55 pushes the locking block 56 to move upward, presses against the bottom of the clamping plate 53, limits the clamping plate 53, and restricts the continued contraction of the support spring 52, ensuring the stability of clamping.

[0028] The semi-enclosed adsorption mechanism 6 consists of a top motor 61, a brush wheel 62, a covering frame 63, a flexible hose 64, a push cylinder 65, an air pump 66, and a purification shell 67. The top motor 61 is symmetrically mounted on the top of one side of the electric slider 44. The output end of the top motor 61 is fixedly connected to the brush wheel 62. A push cylinder 65 is located at the bottom of one side of the electric slider 44. The output end of the push cylinder 65 is fixedly connected to the covering frame 63. A flexible hose 64 is fitted into a through groove in the covering frame 63. One end of the flexible hose 64 is fixed to the air pump 66. The air pump 66 is fixed to the other side of the electric slider 44. A purification shell 67 is mounted on the air pump 66, and a filter screen and... The activated carbon, purification shell 67, and air pump 66 are interconnected. By adding a top motor 61 and brush wheel 62 to the electric slider 44 as a cleaning structure for the welding surface, and simultaneously adding a semi-enclosed structure consisting of a push cylinder 65 and a covering frame 63, the brush wheel 62 cleans the welding area first to ensure welding quality as the welding head 45 moves upward with the electric slider 44. At the same time as the welding head 45 is welding, the air pump 66 generates negative pressure in the covering frame 63, drawing the welding gas into the hose 64 and through the purification shell 67 for discharge. During the process, the filter screen and activated carbon in the purification shell 67 are used to treat the toxic gas, ensuring the health of the surrounding staff.

[0029] Example 2:

[0030] Please see Figure 1-4 This utility model provides a technical solution: an automatic welding device for string inverters, which, based on embodiment one, adds a fixed clamping plate 101, a clamping screw 102, and an adjusting clamping plate 103 to limit and fix the top of the workpiece. The fixed clamping plate 101 is installed on the bottom side of the top support 36, and the adjusting clamping plate 103 is slidably connected to the top support 36. The adjusting clamping plate 103 has a threaded hole that is connected to the clamping screw 102. One end of the clamping screw 102 is rotatably connected to the fixed clamping plate 101, and the other end of the clamping screw 102 is provided with a rotating wheel. The bracket 36 provides sliding support for the adjusting clamp 103, which is threadedly connected to the clamping screw 102. A rotating wheel on the clamping screw 102 drives its rotation. The threaded connection between the adjusting clamp 103 and the fixed clamp 101 allows the adjusting clamp 103 to move closer to or further away from the fixed clamp 101. This, in turn, limits the top of the workpiece by the fixed clamp 101 and the adjusting clamp 103, preventing it from tilting due to compression during clamping. This ensures clamping stability while facilitating adjustment of the clamping distance, thus guaranteeing the versatility of the structure. Although embodiments of this invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of this invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for string inverters, comprising a back plate (1), a center positioning mechanism (2), a longitudinal clamping mechanism (3), a welding mechanism (4), a clamping force detection mechanism (5), and a semi-enclosed adsorption mechanism (6), characterized in that: The back plate (1) is fixed on the support base (7). A control unit (8) is fixedly installed on one side edge of the back plate (1). A center positioning mechanism (2) is provided on the bottom side of the back plate (1) where the control unit (8) is installed. A longitudinal clamping mechanism (3) is symmetrically arranged on the center positioning mechanism (2). The longitudinal clamping mechanism (3) is slidably connected to the back plate (1). A clamping force detection mechanism (5) is provided on the longitudinal clamping mechanism (3). A welding mechanism (4) is provided on the side of the back plate (1) away from the control unit (8). A semi-enclosed adsorption mechanism (6) is provided on the welding mechanism (4).

2. The automatic welding device for string inverters according to claim 1, characterized in that: The central positioning mechanism (2) consists of a positioning bracket (21), a double-ended stud (22), a positioning motor (23), and a positioning slider (24). The positioning bracket (21) is fixed on the back plate (1). The double-ended stud (22) is rotatably connected to the positioning bracket (21) through a bearing. The positioning slider (24) is symmetrically arranged on the double-ended stud (22). The positioning slider (24) is connected to the double-ended stud (22) through a threaded connection. The positioning motor (23) is fixedly installed at one end of the positioning bracket (21). The output end of the positioning motor (23) passes through the positioning bracket (21) and is fixedly connected to one end of the double-ended stud (22).

3. The automatic welding device for string inverters according to claim 1, characterized in that: The longitudinal clamping mechanism (3) consists of a longitudinal support (31), a lifting slider (35), a lifting motor (33), a lifting screw (34), a top support (36), and a bottom support (37). The bottom of the longitudinal support (31) is fixedly connected to the positioning slider (24). The lifting screw (34) is rotatably connected to the longitudinal support (31) through a bearing. The lifting slider (35) is provided on the lifting screw (34). The lifting slider (35) is connected to the lifting screw (34) through an internally embedded ball nut.

4. The automatic welding device for string inverters according to claim 3, characterized in that: A top bracket (36) is fixedly connected to the top of one side of the longitudinal bracket (31), and a bottom bracket (37) is slidably connected to the longitudinal bracket (31). The bottom bracket (37) is fixed on the lifting slider (35), and a lifting motor (33) is fixedly installed on the top of the longitudinal bracket (31). The output end of the lifting motor (33) passes through the longitudinal bracket (31) and is fixedly connected to the top of the lifting screw (34).

5. The automatic welding device for string inverters according to claim 1, characterized in that: The welding mechanism (4) consists of a feed drive mechanism (41), a mounting frame (42), an electric slide bar (43), an electric slider (44), and a welding head (45). The feed drive mechanism (41) is symmetrically arranged on the side of the back plate (1) away from the control unit (8). The mounting frame (42) is mounted on the feed drive mechanism (41). An electric slide bar (43) is provided in the mounting frame (42). An electric slider (44) is provided on the electric slide bar (43). A welding head (45) is provided on the electric slider (44).

6. The automatic welding device for string inverters according to claim 1, characterized in that: The clamping force detection mechanism (5) consists of a limiting rod (51), a support spring (52), a clamping plate (53), a pressure testing plate (54), a locking hydraulic cylinder (55), and a locking block (56). The limiting rod (51) is slidably connected to the through holes symmetrically opened on the bottom bracket (37). The bottom bracket (37) is fixed on the lifting slider (35). The lifting slider (35) is connected to the lifting screw (34) through the ball nuts embedded inside. 7) is provided with a support spring (52) at the top. The top end of the support spring (52) is fixed to the bottom of the clamping plate (53). The top end of the limiting rod (51) passes through the support spring (52) and is fixed on the clamping plate (53). The top of the clamping plate (53) is provided with a pressure test plate (54). The locking hydraulic cylinder (55) is fixedly installed at the bottom of the bottom bracket (37). The output end of the locking hydraulic cylinder (55) passes through the bottom bracket (37) and is fixedly connected to a locking block (56).

7. The automatic welding device for string inverters according to claim 1, characterized in that: The semi-enclosed adsorption mechanism (6) consists of a top motor (61), a brush wheel (62), a covering frame (63), a hose (64), a push cylinder (65), an air pump (66), and a purification shell (67). The top motor (61) is symmetrically installed on the top of one side of the electric slider (44). The output end of the top motor (61) is fixedly connected to the brush wheel (62). The bottom of one side of the electric slider (44) is provided with a push cylinder (65). The output end of the push cylinder (65) is fixedly connected to the covering frame (63). A hose (64) is sleeved in the through groove opened on the covering frame (63). One end of the hose (64) is fixed to the air pump (66). The air pump (66) is fixed on the other side of the electric slider (44). A purification shell (67) is provided on the air pump (66). A filter screen and activated carbon are arranged in the purification shell (67). The purification shell (67) is connected to the output end of the air pump (66).

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