Bottom tooling for photovoltaic inverters

Abstract

The present invention provides a bottom tooling of a photovoltaic inverter, comprising a bottom plate, a plurality of workstations being arranged on the bottom plate, two opposite bottom brackets being arranged on each workstation, a pressure seat being arranged above the bottom bracket and being driven by a cylinder device to press a bottom shell placed on the bottom bracket for fixing, a cross bar being arranged on the pressure seat, locking rings being arranged at both ends of the cross bar and being movable along the axial direction thereof, locking teeth being arranged on the locking ring, two cross bars on adjacent workstations being connected by the locking teeth, an air cavity being arranged in the cross bar and being close to the locking ring, a first piston being arranged on the locking ring for separating the air cavity into a first chamber and a second chamber in the air cavity, a compression spring being arranged in the first chamber, a first air pipe being connected to the second chamber, a second piston being arranged in the cylinder device for separating a cylinder body into a first cylinder chamber and a second cylinder chamber, the second piston being connected to a piston shaft, the piston shaft being connected to the pressure seat, the first cylinder chamber being connected to a second air pipe, a piston cylinder corresponding to the locking ring being arranged on the bottom plate, and the piston cylinder being separated by a third piston and a fourth piston.

Description

Technical Field

[0001] The present invention relates to the technical field of tooling, and in particular to a bottom tooling of a photovoltaic inverter. Background Art

[0002] A photovoltaic inverter is an inverter that can convert the variable DC voltage generated by photovoltaic solar panels into AC power at mains frequency, which can be fed back into the commercial power transmission system or used for off-grid power grids.

[0003] Currently, the production of photovoltaic inverters is mainly carried out on automated production lines. During the production process, the bottom shell of the inverter is clamped by several bottom fixtures. Currently, these bottom fixtures have a decentralized control method in which each is controlled by a clamping cylinder, and there is also a centralized control method in which the moving parts of these bottom fixtures are connected in a row and controlled by the clamping cylinder. The first control method is relatively more flexible. After the bottom shell is placed on the workstation, it is fixed immediately, thus fixing it one by one. However, the disadvantage is also quite obvious, that is, low work efficiency. The second control method is obviously more efficient. After the bottom shell is placed, it can be fixed in a centralized manner at one time. However, the disadvantage is that if there is a problem with one of the bottom shells and it needs to be removed, it will affect the other bottom shells, causing the workstations in the row to be suspended. Therefore, according to the actual production situation, there is a lack of a bottom fixture that takes into account both efficiency and flexibility. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to enable the action components on each station to move synchronously, and also to enable the action components on any one of the stations to be separated and move independently, thereby providing a bottom tooling for a photovoltaic inverter.

[0005] The technical solution of the present invention is that the bottom tooling of the photovoltaic inverter includes a bottom plate, a plurality of workstations are provided on the bottom plate, and two opposite bottom brackets are provided on each workstation. A pressure seat is provided above the bottom bracket, which is driven by a cylinder device to press the bottom shell placed on the bottom bracket to achieve fixation. A cross bar is provided on the pressure seat, and a locking ring that can move along its axial direction is provided at both ends of the cross bar, and the locking ring is provided with locking teeth. The two cross bars on adjacent workstations are connected by the locking teeth. An air cavity close to the locking ring is provided in the cross bar, and the locking ring is further provided with a first piston in the air cavity for separating the air cavity into a first chamber and a second chamber. A compression spring is provided in the first chamber, and the second chamber is connected to a first air pipe. The cylinder device is provided with a cylinder body for separating the cylinder body into a first cylinder chamber and a second cylinder chamber. The second piston in the second cylinder chamber, the second piston is connected to the piston shaft, the piston shaft is connected to the pressure seat, the first cylinder chamber is connected to the second air pipe, the bottom plate is provided with a piston cylinder corresponding to the locking ring, a limiting ring is provided in the piston cylinder, and the piston cylinder is also provided with a third piston and a fourth piston respectively located on both sides of the limiting ring, the third piston and the fourth piston are connected by a connecting spring, the third piston and the fourth piston separate the piston cylinder into a first cylinder chamber, a second cylinder chamber, and an open cylinder cavity, the second air pipe is connected to the first cylinder chamber, and the first air pipe is connected to the second cylinder chamber; a tooth plate deviating from the axis of the piston cylinder is slidably connected in the cylinder cavity, and the two relative tooth plates are staggered, and a gear driven by a motor is provided between the two tooth plates.

[0006] As an embodiment, a hinge seat is provided on the cylinder body, the pressure seat is T-shaped, one end of the pressure seat is hinged to the hinge seat, one end is provided with a long hole for connecting the piston shaft, and one end is used to press the bottom shell.

[0007] As an embodiment, the cross rod is provided with a cross groove along its axial direction, the locking ring is provided with a cross connector that matches the cross groove, the cross connector is provided with a connecting shaft extending into the air cavity, and the first piston is provided on the connecting shaft.

[0008] As an embodiment, the base and the cylinder body are connected to each other.

[0009] As an embodiment, one end of the compression spring abuts against the bottom of the first chamber, and the other end abuts against the first piston. In a natural state, the compression spring is compressed so that the locking ring is located at the outermost end of the cross bar; when air is inflated into the second chamber, the first piston moves laterally so that the locking ring moves inward relative to the cross bar and compresses the compression spring.

[0010] As an embodiment, when the pressure seat presses the bottom shell, the third piston abuts against the limiting ring; when the tooth plate contacts the fourth piston and presses the third piston, the space of the second cylinder chamber is compressed to inflate the second chamber, and the third piston and the fourth piston jointly compress the space of the first cylinder chamber to inflate the first cylinder chamber as the tooth plate is further pressed inward.

[0011] As an embodiment, the locking teeth are arranged in a circular array on the locking ring, and a tooth gap is provided between two adjacent locking teeth, and the width of the tooth gap is the same as the width of the locking teeth.

[0012] As an embodiment, the motor is arranged at the bottom of the base plate, and a gear shaft connected to the gear is provided on the base plate, and the gear shaft is in transmission connection with the motor.

[0013] As an implementation manner, the gear shafts on both sides are transmission-connected to the motor.

[0014] As an embodiment, a first rotating drum device and a second rotating drum device are respectively provided on both sides of the bottom plate, and a flip motor for driving the bottom plate to flip is provided at the first rotating drum device.

[0015] The present invention has the following advantages over the prior art: driven by a motor, the gears on both sides of the bottom shell rotate synchronously, and the two toothed plates corresponding to the opposing piston cylinders press into their respective piston cylinders. When the toothed plates begin to press the fourth piston, the third piston remains in place due to the air pressure in the first cylinder chamber. The fourth piston compresses the connecting spring inward, and the space in the second cylinder chamber is compressed, thereby increasing the air pressure inside it and the second chamber. The first piston is then compressed by the compression spring, and the locking rings at both ends of the crossbar are simultaneously turned inward. The crossbar is thus separated from the locked connection with the other crossbars. Thereafter, as the two toothed plates further press into their respective piston cylinders, the air pressure in the first cylinder chamber is overcome, and the pressure in the first cylinder chamber is also increased. This means that the piston shaft is driven downward by the second piston, and ultimately the pressure seat is driven to release the bottom shell. Through the above-mentioned actions, by controlling the motor, the crossbar is unlocked and the pressure seat is released during the inward pressure of the toothed plates, thus achieving both the efficiency of centralized control and the flexibility of decentralized control for the bottom tooling of the photovoltaic inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a bottom tooling of a photovoltaic inverter provided in an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the first structure of a single workstation of a bottom tooling of a photovoltaic inverter provided in an embodiment of the present invention;

[0018] Figure 3 for Figure 2A partial enlarged view of the bottom tooling provided in;

[0019] Figure 4 A second structural diagram of a single workstation of a bottom tooling of a photovoltaic inverter provided in an embodiment of the present invention;

[0020] Figure 5 An enlarged view of the end of a crossbar provided for an embodiment of the present invention.

[0021] In the figure: 1, bottom plate; 2, bottom support; 3, cylinder device; 301, cylinder body; 4, bottom shell; 5, pressure seat; 6, cross bar; 7, lock ring; 8, lock tooth; 9, air cavity; 10, first chamber; 11, second chamber; 12, first piston; 13, compression spring; 14, first air pipe; 15, first cylinder chamber; 16, second cylinder chamber; 17, second piston; 18, piston shaft; 19, second air pipe; 20, piston cylinder; 21, Limiting ring; 22. Third piston; 23. Fourth piston; 24. Connecting spring; 25. First cylinder chamber; 26. Second cylinder chamber; 27. Cylinder cavity; 28. Tooth plate; 29. Motor; 30. Gear; 31. Articulated seat; 32. Long hole; 33. Cross groove; 34. Cross connector; 35. Connecting shaft; 36. Tooth gap; 37. Gear shaft; 38. First rotating drum device; 39. Second rotating drum device; 40. Flip motor. DETAILED DESCRIPTION

[0022] The above and other embodiments and advantages of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments.

[0023] In one embodiment, Figure 1-4 shown.

[0024] The bottom tooling of the photovoltaic inverter provided in this embodiment includes a bottom plate 1, a plurality of workstations are provided on the bottom plate 1, and two opposite bottom brackets 2 are provided on each workstation. A pressure seat 5 is provided above the bottom bracket 2, which is driven by a cylinder device 3 to press the bottom shell 4 placed on the bottom bracket 2 to achieve fixation. A cross bar 6 is provided on the pressure seat 5, and a locking ring 7 that can move along its axial direction is provided at both ends of the cross bar 6. The locking ring 7 is provided with a locking tooth 8. The two cross bars 6 on adjacent workstations are connected by the locking tooth 8. An air cavity 9 close to the locking ring 7 is opened in the cross bar 6. The locking ring 7 is also provided with a first piston 12 that separates the air cavity 9 into a first chamber 10 and a second chamber 11 in the air cavity 9. A compression spring 13 is provided in the first chamber 10. The second chamber 11 is connected to a first air pipe 14. The cylinder device 3 is provided with a second piston 12 that separates the cylinder body 301 into a first cylinder chamber 15 and a second cylinder chamber 16. Piston 17, the second piston 17 is connected to the piston shaft 18, the piston shaft 18 is connected to the pressure seat 5, the first cylinder chamber 15 is connected to the second air pipe 19, the bottom plate 1 is provided with a piston cylinder 20 corresponding to the lock ring 7, a limiting ring 21 is provided in the piston cylinder 20, and a third piston 22 and a fourth piston 23 are respectively provided in the piston cylinder 20, which are located on both sides of the limiting ring 21. The third piston 22 and the fourth piston 23 are connected by a connecting spring 24. The third piston 22 and the fourth piston 23 separate the piston cylinder 20 into a first cylinder chamber 25, a second cylinder chamber 26, and an open cylinder cavity 27. The second air pipe 19 is connected to the first cylinder chamber 25, and the first air pipe 14 is connected to the second cylinder chamber 26; a tooth plate 28 deviating from the axis of the piston cylinder 20 is slidably connected in the cylinder cavity 27, and the two opposite tooth plates 28 are staggered, and a gear 30 driven by a motor 29 is provided between the two tooth plates 28.

[0025] In this embodiment, a new type of bottom fixture for photovoltaic inverters is proposed, which is designed for decentralized or centralized control of each workstation by traditional bottom fixtures. Under normal circumstances, the actuating components (i.e., pressure seats) on each workstation can act synchronously, i.e., simultaneously pressing the bottom shell 4 on each workstation, or simultaneously releasing the bottom shell 4 on each workstation. Therefore, it has a higher action efficiency. However, if a bottom shell 4 with individual problems needs to be taken out separately, the corresponding pressure seat 5 can also be detached from it and act separately. The specific implementation method is that, driven by the motor 29, the gears 30 on both sides of the bottom shell 4 rotate synchronously, and the two tooth plates 28 corresponding to the relative piston cylinders 20 press into their respective piston cylinders 20. As shown in the figure, Figure 3As shown, when the tooth plate 28 begins to press the fourth piston 23, the third piston 22 remains in place due to the air pressure in the first cylinder chamber 25. The fourth piston 23 compresses the connecting spring 24 inward. At the same time, the space in the second cylinder chamber 26 is compressed, thereby increasing the air pressure inside it and in the second chamber 11. Then, the first piston 12 is compressed and compresses the compression spring 13, while forcing the locking rings 7 at both ends of the crossbar 6 inward. The crossbar 6 is thus separated from the locked connection relationship with the other crossbars 6. It should be pointed out that the two adjacent crossbars 6 are engaged with each other through the offset locking teeth 8, so the crossbars 6 are synchronized when they flip. However, after the space of the second cylinder chamber 26 is compressed, the crossbar 6 is separated from the locked connection relationship with the other crossbars 6. Thereafter, as the two tooth plates 28 further pressurize their respective piston cylinders 20, after overcoming the air pressure in the first cylinder chamber 25, the pressure in the first cylinder chamber 25 is also increased. The first cylinder chamber 25 and the first cylinder chamber 15 are connected by the second air pipe 19. Therefore, the increase in pressure means that the second piston 17 drives the piston shaft 18 downward, and finally drives the pressure seat 5 to release the bottom shell 4. It should be noted that after the cylinder body 301 is connected to the air source, there is a certain air pressure in the second cylinder chamber 16, which keeps the pressure seat 5 pressed against the bottom shell 4, and the air pressure in the second cylinder chamber 16 is greater than the air pressure in the first cylinder chamber 15. However, as the third piston 22 and the fourth piston 23 move laterally toward the side where the second air pipe 19 is located, the space in the first cylinder chamber 25 is compressed, causing the pressure inside to be greater than the air pressure in the second cylinder chamber 16. During this process, the fourth piston 23 never passes through the first air pipe 14 due to the minimum length limitation of the connecting spring 24 after compression, that is, the first air pipe 14 always faces the second cylinder chamber 26 .

[0026] It can be seen that after the above actions, by controlling the motor 29, the cross bar 6 is unlocked and the pressure seat 5 is loosened in the process of the tooth plate 28 pressing inward, thereby achieving the bottom tooling of the photovoltaic inverter with both the high efficiency of centralized control and the flexibility of decentralized control.

[0027] In one embodiment, Figure 3 shown.

[0028] The bottom tooling of the photovoltaic inverter provided in this embodiment has a hinged seat 31 on its cylinder body 301, and the pressure seat 5 is T-shaped. One end of the pressure seat 5 is hinged to the hinged seat 31, and one end is provided with a long hole 32 for connecting the piston shaft 18, and one end is used to press the bottom shell 4.

[0029] In this embodiment, when the piston shaft 18 moves downward, it pulls the pressure seat 5 to flip around the hinge axis between it and the hinge seat 31 , and the elongated hole 32 is provided to meet the needs of the pulling action of the piston shaft 18 .

[0030] In one embodiment, Figure 5 shown.

[0031] The bottom tooling of the photovoltaic inverter provided in this embodiment has a cross groove 33 along its axial direction on the cross bar 6, a cross connector 34 that matches the cross groove 33 is provided in the lock ring 7, and a connecting shaft 35 extending into the air cavity 9 is provided on the cross connector 34, and the first piston 12 is provided on the connecting shaft 35.

[0032] In this embodiment, a cross slot 33 and a cross connector 34 are provided to achieve a flexible connection between the lock ring 7 and the cross bar 6. This connection is secure and strong. A connecting shaft 35 has one end connected to the cross connector 34 and one end extending into the second chamber 11 and connected to the first piston 12. When the second chamber 11 is pressurized, the first piston 12 moves inward, carrying the lock ring 7 with it via the connecting shaft 35.

[0033] In one embodiment, Figure 2 shown.

[0034] The bottom fixture of the photovoltaic inverter provided in this embodiment has a bottom support 2 and a cylinder body 301 connected to each other.

[0035] In this embodiment, the base 2 and the cylinder 301 are arranged in one place, so that the structure is more compact.

[0036] In one embodiment, Figure 3 shown.

[0037] The bottom tooling of the photovoltaic inverter provided in this embodiment has a compression spring 13 whose one end abuts against the bottom of the first chamber 10 and the other end abuts against the first piston 12. In a natural state, the compression spring 13 is compressed to cause the locking ring 7 to be located at the outermost end of the cross bar 6; when air is inflated into the second chamber 11, the first piston 12 moves laterally to cause the locking ring 7 to move inward relative to the cross bar 6 and compress the compression spring 13.

[0038] In this embodiment, under the action of the compression spring 13, the locking ring 7 is located at the outermost end of the crossbar 6, and as mentioned above, the two adjacent crossbars 6 engage with each other through the offset locking teeth 8, that is, when the locking rings 7 of the two adjacent crossbars 6 are in contact, the locking teeth 8 are offset. In a preferred embodiment, the locking teeth 8 are arranged in a circular array on the locking ring 7, and a tooth gap 36 is provided between two adjacent locking teeth 8, and the width of the tooth gap 36 is the same as the width of the locking teeth 8. This means that the locking teeth 8 of one locking ring 7 are embedded in the tooth gap 36 of the other locking ring 7. By setting the width of the tooth gap 36 to the same as the width of the locking teeth 8, the two are tightly engaged, and even when the crossbars 6 are flipped, they are highly synchronized.

[0039] In one embodiment, Figure 3 shown.

[0040] The bottom tooling of the photovoltaic inverter provided in this embodiment is such that when the pressure seat 5 presses the bottom shell 4, the third piston 22 abuts against the limit ring 21; when the tooth plate 28 contacts the fourth piston 23 and presses the third piston 22, the space of the second cylinder chamber 26 is compressed to inflate the second chamber 11, and the third piston 22 and the fourth piston 23 jointly compress the space of the first cylinder chamber 25 as the tooth plate 28 is further pressed inward to inflate the first cylinder chamber 15.

[0041] In this embodiment, due to the presence of the limit ring 21, when there is air pressure in the first cylinder chamber 25, the third piston 22 only abuts against the limit ring 21 and does not pass through the first air pipe 14, so that the lock ring 7 will only move when the tooth plate 28 is pressed inward.

[0042] In one embodiment, Figure 4 shown.

[0043] The bottom fixture of the photovoltaic inverter provided in this embodiment has a motor 29 disposed at the bottom of the bottom plate 1 . The bottom plate 1 is provided with a gear shaft 37 connected to the gear 30 . The gear shaft 37 is in transmission connection with the motor 29 .

[0044] In this embodiment, a transmission component is provided within the base plate 1, so that the motor 29 located at the bottom of the base plate 1 can drive the gear 30 at the top of the base plate 1 to rotate. In a preferred embodiment, the gear shafts 37 on both sides are in transmission connection with the motor 29. A single motor 29 can control the synchronous movement of the gear shafts 37 on both sides.

[0045] In one embodiment, Figure 1 shown.

[0046] The bottom fixture of the photovoltaic inverter provided in this embodiment has a first rotating drum device 38 and a second rotating drum device 39 on both sides of the bottom plate 1, and a turning motor 40 for driving the bottom plate 1 to turn is provided at the first rotating drum device 38.

[0047] In this embodiment, after the process of placing the components on the base 2 is completed, the base plate 1 is turned over after being fixed.

[0048] The above specific embodiments further illustrate the purpose of the invention, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it is pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The bottom tooling of the photovoltaic inverter is characterized by: The invention comprises a bottom plate (1), wherein the bottom plate (1) is provided with a plurality of workstations, and each workstation is provided with two opposite bottom brackets (2). A pressure seat (5) is provided above the bottom bracket (2) and is driven by a cylinder device (3) to press a bottom shell (4) placed on the bottom bracket (2) to achieve fixation. A cross bar (6) is provided on the pressure seat (5), and locking rings (7) capable of moving along the axial direction are provided at both ends of the cross bar (6). The locking ring (7) is provided with locking teeth (8). The two cross bars (6) on adjacent workstations are connected by the locking teeth (8). The cross bar (6) is connected to the bottom shell (4) by the cylinder device (3). ) is provided with an air cavity (9) close to the locking ring (7), the locking ring (7) is further provided with a first piston (12) in the air cavity (9) for separating the air cavity (9) into a first chamber (10) and a second chamber (11), a compression spring (13) is provided in the first chamber (10), the second chamber (11) is connected to a first air pipe (14), the cylinder device (3) is provided with a second piston (17) for separating the cylinder body (301) into a first cylinder chamber (15) and a second cylinder chamber (16), the second piston (17) is connected to The piston shaft (18) is connected to the pressure seat (5), the first cylinder chamber (15) is connected to the second air pipe (19), the bottom plate (1) is provided with a piston cylinder (20) corresponding to the lock ring (7), the piston cylinder (20) is provided with a limit ring (21), the piston cylinder (20) is further provided with a third piston (22) and a fourth piston (23) respectively located on both sides of the limit ring (21), the third piston (22) and the fourth piston (23) are connected by a connecting spring (24), the third piston (22) and the fourth piston (23) separate the piston cylinder (20) into a first cylinder chamber (25), a second cylinder chamber (26), and an open cylinder cavity (27); the second air pipe (19) is connected to the first cylinder chamber (25), and the first air pipe (14) is connected to the second cylinder chamber (26); a tooth plate (28) deviating from the axis of the piston cylinder (20) is slidably connected in the cylinder cavity (27), and the two relative tooth plates (28) are staggered, and a gear (30) driven by a motor (29) is provided between the two tooth plates (28).

2. The bottom tooling of the photovoltaic inverter according to claim 1, characterized in that: The cylinder body (301) is provided with a hinge seat (31), the pressure seat (5) is T-shaped, one end of the pressure seat (5) is hinged to the hinge seat (31), one end is provided with a long hole (32) for connecting the piston shaft (18), and the other end is used to press the bottom shell (4).

3. The bottom tooling of the photovoltaic inverter according to claim 1, characterized in that: The cross rod (6) is provided with a cross groove (33) along its axial direction, the lock ring (7) is provided with a cross connector (34) that matches the cross groove (33), the cross connector (34) is provided with a connecting shaft (35) that extends into the air cavity (9), and the first piston (12) is provided on the connecting shaft (35).

4. The bottom tooling of the photovoltaic inverter according to claim 1, characterized in that: The base (2) and the cylinder (301) are connected to each other.

5. The bottom tooling of the photovoltaic inverter according to claim 1, characterized in that: One end of the compression spring (13) abuts against the bottom of the first chamber (10), and the other end abuts against the first piston (12). In a natural state, the compression spring (13) is compressed so that the locking ring (7) is located at the outermost end of the cross bar (6); when air is inflated into the second chamber (11), the first piston (12) moves laterally so that the locking ring (7) moves inward relative to the cross bar (6) and compresses the compression spring (13).

6. The bottom tooling of the photovoltaic inverter according to claim 5, characterized in that: When the pressure seat (5) presses the bottom shell (4), the third piston (22) abuts against the limiting ring (21); when the tooth plate (28) contacts the fourth piston (23) and presses the third piston (22), the space of the second barrel chamber (26) is compressed to inflate the second chamber (11), and the third piston (22) and the fourth piston (23) jointly compress the space of the first barrel chamber (25) as the tooth plate (28) is further pressed inward to inflate the first cylinder chamber (15).

7. The bottom tooling of the photovoltaic inverter according to claim 1, characterized in that: The locking teeth (8) are arranged in a circumferential array on the locking ring (7), and a tooth gap (36) is provided between two adjacent locking teeth (8), and the width of the tooth gap (36) is the same as the width of the locking teeth (8).

8. The bottom tooling of the photovoltaic inverter according to claim 1, characterized in that: The motor (29) is arranged at the bottom of the base plate (1); a gear shaft (37) connected to the gear (30) is provided on the base plate (1); the gear shaft (37) and the motor (29) are in transmission connection.

9. The bottom tooling of the photovoltaic inverter according to claim 8, characterized in that: The gear shafts (37) on both sides are in transmission connection with the motor (29).

10. The bottom tooling of the photovoltaic inverter according to claim 1, characterized in that: A first rotating drum device (38) and a second rotating drum device (39) are respectively provided on both sides of the bottom plate (1); the first rotating drum device (38) is provided with a turning motor (40) for driving the bottom plate (1) to turn over.

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