A mounting fixture for a PWM rectifier

Abstract

This utility model discloses an installation fixture for a PWM rectifier, relating to the field of rectifier installation technology. It includes a test bench, a first slider, and a second slider. The PWM rectifier assembly is mounted on the upper surface of the test bench, which has a groove and a recess. A knob is mounted on the left end of the left and right threaded rods. A transverse positioning plate is mounted above both the first and second sliders. Longitudinal positioning plates are mounted on both the front and rear sides of the transverse positioning plate. A threaded post is mounted on the left side of the knob. With this PWM rectifier installation fixture, rotating the fixing nut on the positioning screw secures the transverse positioning plate, thus completing the installation. To remove the transverse positioning plate, the fixing nut is removed, allowing for the replacement of different transverse positioning plates and their connected longitudinal positioning plates for different batches of PWM rectifiers.

Description

Technical Field

[0001] This utility model relates to the field of rectifier installation technology, specifically to an installation fixture for a PWM rectifier. Background Technology

[0002] As a core device in the field of power electronics, the PWM rectifier plays a crucial role in modern electrical systems. Through pulse width modulation technology using high-frequency switching devices, it achieves efficient AC-to-DC power conversion, while also offering advantages such as power factor correction and four-quadrant operation. In the field of new energy power generation, the PWM rectifier can convert the unstable AC power output from wind turbines and photovoltaic arrays into stable DC power, effectively improving power quality and reducing harmonic pollution to the power grid. In electric vehicle charging systems, it enables bidirectional energy flow, efficiently rectifying grid power into DC power to charge batteries, and also inverting battery power back into AC power when needed to feed it back to the grid, improving energy utilization efficiency.

[0003] As PWM rectifiers are increasingly used in various fields, the importance of their installation process is becoming more and more prominent.

[0004] For example, Chinese utility model patent application number 202222520278.4 discloses an installation fixture for a PWM rectifier. It uses X-axis, Y-axis, and Z-axis positioning plates for coarse positioning of the PWM rectifier body, and limit rods to support the input or output wiring on the PWM rectifier body, enabling precise positioning. An installation and debugging platform acts as a gravity support for the PWM rectifier body, preventing it from vibrating with the connected equipment and ensuring stable installation. However, this device still has certain shortcomings.

[0005] The X-axis positioning plate and the Y-axis positioning plate are fixedly connected. The X-axis positioning plate cannot be disassembled and replaced according to the size of the PWM rectifier body. When the X-axis positioning plate is damaged, it is also inconvenient to replace it, resulting in low practicality.

[0006] Therefore, we propose a mounting fixture for a PWM rectifier to address the problems mentioned above. Utility Model Content

[0007] The purpose of this utility model is to provide an installation fixture for a PWM rectifier, so as to solve the problems mentioned in the background art, that the X-axis positioning plate and the Y-axis positioning plate are fixedly connected, and the X-axis positioning plate cannot be disassembled and replaced according to the size of the PWM rectifier body. When the X-axis positioning plate is damaged, it is also inconvenient to replace it, resulting in low practicality.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an installation fixture for a PWM rectifier, including a test bench, a first slider, and a second slider. The PWM rectifier is mounted on the upper surface of the test bench. The upper surface of the test bench is provided with a sliding groove and a recess. Left and right threaded rods are installed inside the sliding groove. A knob is installed at the left end of the left and right threaded rods. The first slider and the second slider are respectively installed on the left and right sides of the left and right threaded rods. A horizontal positioning plate is installed above the first slider and the second slider. Positioning screws are installed on the front and rear sides of the horizontal positioning plate.

[0009] The transverse positioning plate is equipped with longitudinal positioning plates on both its front and rear sides, and each longitudinal positioning plate is equipped with an adjusting bolt.

[0010] A threaded post is mounted on the left side of the knob, and a fastening assembly is mounted on the threaded post.

[0011] Preferably, the groove is located on the left side of the slide, and the knob is located inside the groove.

[0012] With the above structural design, the knob is located in the groove to avoid protruding from the table surface and affecting operation. At the same time, it is easy to rotate and adjust the left and right threaded rods, making it more convenient to adjust the spacing of the horizontal positioning plate.

[0013] Preferably, the lower surface of the transverse positioning plate is provided with a snap-fit ​​groove, and the upper surface of the first slider and the second slider is provided with a protrusion, which snaps into the snap-fit ​​groove.

[0014] With the above structural design, the protrusion and the snap-fit ​​groove are snapped together to realize the quick installation of the transverse positioning plate and the first and second sliders. It is fixed with the positioning screw, which is convenient for disassembly and replacement to adapt to different specifications of rectifiers.

[0015] Preferably, a fixing nut is installed on the positioning screw, and positioning grooves are provided on the transverse positioning plates. The positioning grooves are located on the front and rear sides of the snap-fit ​​groove, and the positioning screw passes through the positioning groove.

[0016] With the above structural design, the positioning screw and the fixing nut cooperate to fix the transverse positioning plate on the first slider and the second slider, ensuring that there is no shaking after positioning, and at the same time supporting quick disassembly and replacement of the transverse positioning plate.

[0017] Preferably, each adjusting bolt has a fixing block installed at its lower end. The fixing block has a circular structure design, and the adjusting bolt is threadedly connected to the longitudinal positioning plate.

[0018] With the above structural design, the adjusting bolts drive the fixing block to press down on the longitudinal edge of the PWM rectifier, achieving vertical positioning. This, combined with the lateral positioning, forms a three-dimensional fixation, improving installation stability.

[0019] Preferably, the fastening assembly includes a movable sleeve, a limiting strip, a limiting groove, and a threaded sleeve. The movable sleeve is fitted onto the threaded post, and a threaded sleeve is installed at the left end of the threaded post. A limiting strip is installed on the movable sleeve, and a limiting groove is formed inside the groove.

[0020] With the above structural design, the fastening component pushes the movable sleeve to tightly abut against the knob through the threaded sleeve, locking the knob. Under the limiting action of the limiting strip and the limiting groove, the knob is prevented from loosening and positioning deviation is avoided.

[0021] Preferably, one end of the limiting strip is located inside the limiting groove, and the limiting strip is slidably connected to the limiting groove.

[0022] With the above structural design, when it is necessary to rotate the left and right threaded rods, the threaded sleeve can be removed, and then the movable sleeve can be moved along the limiting groove through the limiting strip to disengage the movable sleeve from the threaded column, thereby releasing the limitation on the knob.

[0023] Compared with the prior art, the beneficial effects of this utility model are: the mounting fixture for the PWM rectifier:

[0024] 1. Convenient disassembly and maintenance: Rotate the fixing nut on the positioning screw to fix the horizontal positioning plate, thereby completing the installation of the horizontal positioning plate. When disassembling the horizontal positioning plate, remove the fixing nut to remove the horizontal positioning plate. This allows for the replacement of different horizontal positioning plates and the longitudinal positioning plates connected to the horizontal positioning plates according to different batches of PWM rectifiers.

[0025] 2. Anti-loosening fastening design: After the left and right threaded rods have rotated, the rotating threaded sleeve pushes the movable sleeve to squeeze the knob, and the limit strip is embedded in the limit groove to lock the knob to prevent loosening. At the same time, it prevents accidental activation of the knob from causing the left and right threaded rods to rotate, ensuring the stable positioning of the entire tooling. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the PWM rectifier body of this utility model during installation;

[0028] Figure 3 This is a schematic diagram of the structure of the transverse positioning plate of this utility model during disassembly;

[0029] Figure 4 This is a bottom view of the horizontal positioning plate structure of this utility model;

[0030] Figure 5 This is a schematic diagram of the knob position structure of this utility model;

[0031] Figure 6 This is a schematic diagram of the structure when the knob of this utility model is tightened.

[0032] In the diagram: 1. Debugging platform; 2. PWM rectifier assembly; 3. Slide groove; 4. Groove; 5. Left and right threaded rods; 6. Knob; 7. First slider; 8. Second slider; 9. Protrusion; 10. Horizontal positioning plate; 11. Snap-fit ​​groove; 12. Positioning groove; 13. Positioning screw; 14. Fixing nut; 15. Longitudinal positioning plate; 16. Adjusting bolt; 17. Fixing block; 18. Threaded post; 19. Movable sleeve; 20. Limiting strip; 21. Limiting groove; 22. Threaded sleeve. Detailed Implementation

[0033] 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.

[0034] Please see Figures 1-6This utility model provides a technical solution: an installation fixture for a PWM rectifier, including a test bench 1, a PWM rectifier assembly 2, a sliding groove 3, a groove 4, left and right threaded rods 5, a knob 6, a first slider 7, a second slider 8, a protrusion 9, a transverse positioning plate 10, a snap-fit ​​groove 11, a positioning groove 12, a positioning screw 13, a fixing nut 14, a longitudinal positioning plate 15, an adjusting bolt 16, a fixing block 17, a threaded column 18, a movable sleeve 19, a limiting strip 20, a limiting groove 21, and a threaded sleeve 22. The PWM rectifier assembly 2 is installed on the upper surface of the test bench 1. The upper surface of the test bench 1 has a sliding groove 3 and a groove 4. The left and right threaded rods 5 are installed inside the sliding groove 3. A knob 6 is installed on the left end of the left and right threaded rods 5. The first slider 7 and the second slider 8 are installed on the left and right sides of the left and right threaded rods 5, respectively. A transverse positioning plate 10 is installed above both the first slider 7 and the second slider 8. A knob 6 is installed on the front and rear sides of the transverse positioning plate 10. The positioning screw 13 has a groove 4 located on the left side of the slide groove 3, and a knob 6 located inside the groove 4. Rotating the knob 6 drives the left and right threaded rods 5 to rotate, driving the first slider 7 and the second slider 8 to move towards each other in the slide groove 3, thereby driving the horizontal positioning plate 10 to adjust the spacing to adapt to PWM rectifiers 2 of different widths. When the horizontal positioning plate 10 clamps the PWM rectifier 2, the vertical positioning plate 15 limits the vertical position of the PWM rectifier 2, thus simultaneously limiting the PWM rectifier 2 in two directions. The lower surface of the horizontal positioning plate 10 is provided with a snap-fit ​​groove 11, and the upper surface of the first slider 7 and the second slider 8 is provided with a protrusion 9. The protrusion 9 snaps into the snap-fit ​​groove 11. When the horizontal positioning plate 10 is installed, the protrusion 9 on the first slider 7 and the second slider 8 snaps into the snap-fit ​​groove 11 on the horizontal positioning plate 10, while the positioning screw 13 passes through the positioning groove 12 on the horizontal positioning plate 10.

[0035] Longitudinal positioning plates 15 are installed on both the front and rear sides of the transverse positioning plate 10. A fixing nut 14 is installed on the positioning screw 13. A positioning groove 12 is opened on the transverse positioning plate 10. The positioning groove 12 is located on the front and rear sides of the snap-fit ​​groove 11. The positioning screw 13 passes through the positioning groove 12. By rotating the fixing nut 14 on the positioning screw 13, the fixing nut 14 fixes the transverse positioning plate 10, thereby completing the installation of the transverse positioning plate 10. When disassembling the transverse positioning plate 10, the fixing nut 14 is removed, and the transverse positioning plate 10 can be removed. Thus, different transverse positioning plates 10 and the longitudinal positioning plates 15 connected to the transverse positioning plates 10 can be replaced according to different batches of PWM rectifier overall 2. Adjusting bolts 16 are installed on the longitudinal positioning plates 15.

[0036] A threaded post 18 is installed on the left side of the knob 6, and a fastening component is installed on the threaded post 18. A fixing block 17 is installed at the lower end of each adjusting bolt 16. The fixing block 17 has a circular structure design. The adjusting bolt 16 is threadedly connected to the longitudinal positioning plate 15. Tightening the adjusting bolt 16 causes the fixing block 17 to move downwards, pressing down on the longitudinal edge of the PWM rectifier assembly 2, thus achieving vertical positioning of the PWM rectifier assembly 2. This allows for fixing the PWM rectifier assembly 2 in three positions, improving the overall performance of the PWM rectifier assembly. 2. Installation stability: The fastening components include a movable sleeve 19, a limiting strip 20, a limiting groove 21, and a threaded sleeve 22. The movable sleeve 19 is fitted onto the threaded post 18. The threaded sleeve 22 is installed on the left end of the threaded post 18. The limiting strip 20 is installed on the movable sleeve 19. The limiting groove 21 is opened inside the groove 4. After the left and right threaded rods 5 have rotated, the rotating threaded sleeve 22 pushes the movable sleeve 19 to squeeze the knob 6. The limiting strip 20 is embedded in the limiting groove 21, locking the knob 6 to prevent loosening and to prevent accidental contact of the knob 6 from causing the left and right threaded rods 5 to rotate, ensuring the stable positioning of the entire fixture.

[0037] Working principle: When using the installation fixture for this PWM rectifier, firstly, place the PWM rectifier assembly 2 on the test bench 1. The longitudinal positioning plate 15 can be used as a reference for the position of the PWM rectifier assembly 2. Rotating the knob 6 drives the left and right threaded rods 5 to rotate, driving the first slider 7 and the second slider 8 to move towards each other in the slide groove 3, which in turn drives the transverse positioning plate 10 to adjust the spacing to accommodate PWM rectifier assemblies 2 of different widths. When the transverse positioning plate 10 clamps the PWM rectifier assembly 2, the longitudinal positioning plate 15 limits the longitudinal position of the PWM rectifier assembly 2, thus simultaneously limiting the PWM rectifier assembly 2 in two directions. Then, tighten the adjusting bolt 16, which drives the fixing block 17 to move downward, causing the fixing block 17 to press down on the longitudinal edge of the PWM rectifier assembly 2, thereby achieving vertical positioning of the PWM rectifier assembly 2. This achieves fixation of the PWM rectifier assembly 2 in three positions, improving the stability of the PWM rectifier assembly 2 installation.

[0038] When installing the transverse positioning plate 10, the protrusions 9 on the first slider 7 and the second slider 8 engage with the snap-fit ​​groove 11 on the transverse positioning plate 10. At the same time, the positioning screw 13 passes through the positioning groove 12 on the transverse positioning plate 10. The fixing nut 14 on the positioning screw 13 is rotated, and the fixing nut 14 fixes the transverse positioning plate 10, thereby completing the installation of the transverse positioning plate 10. When disassembling the transverse positioning plate 10, the fixing nut 14 is removed, and the transverse positioning plate 10 can be removed. Thus, different transverse positioning plates 10 and the longitudinal positioning plates 15 connected to the transverse positioning plates 10 can be replaced according to different batches of PWM rectifier overall 2.

[0039] After the left and right threaded rods 5 have rotated, the rotating threaded sleeve 22 pushes the movable sleeve 19 to press the knob 6. The limiting strip 20 is embedded in the limiting groove 21, locking the knob 6 to prevent loosening and to prevent accidental activation of the knob 6, which could cause the left and right threaded rods 5 to rotate. This ensures the stable positioning of the entire fixture, thereby completing a series of tasks. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mounting tool of a PWM rectifier, comprising a debugging table (1), a first sliding block (7) and a second sliding block (8), wherein the upper surface of the debugging table (1) is mounted with a PWM rectifier whole (2), characterized in that: The upper surface of the debugging platform (1) is provided with a sliding groove (3) and a groove (4), and the sliding groove (3) is equipped with left and right threaded rods (5). A knob (6) is installed on the left end of the left and right threaded rods (5), and a first slider (7) and a second slider (8) are installed on the left and right sides of the left and right threaded rods (5) respectively. A transverse positioning plate (10) is installed above the first slider (7) and the second slider (8), and a positioning screw (13) is installed on the front and rear sides of the transverse positioning plate (10). The transverse positioning plate (10) is equipped with longitudinal positioning plates (15) on both the front and rear sides, and each longitudinal positioning plate (15) is equipped with an adjusting bolt (16). A threaded post (18) is mounted on the left side of the knob (6), and a fastening assembly is mounted on the threaded post (18).

2. The mounting tool for the PWM rectifier according to claim 1, characterized by: The groove (4) is located on the left side of the slide (3), and the knob (6) is located inside the groove (4).

3. The mounting tool for the PWM rectifier according to claim 1, characterized by: The lower surface of the transverse positioning plate (10) is provided with a snap-fit ​​groove (11), and the upper surfaces of the first slider (7) and the second slider (8) are provided with a protrusion (9), which snaps into the snap-fit ​​groove (11).

4. The mounting tool for the PWM rectifier according to claim 3, characterized by: A fixing nut (14) is installed on the positioning screw (13), and a positioning groove (12) is provided on each of the transverse positioning plates (10). The positioning groove (12) is located on the front and rear sides of the snap-fit ​​groove (11), and the positioning screw (13) passes through the positioning groove (12).

5. The mounting tool for the PWM rectifier according to claim 1, characterized by: Each adjusting bolt (16) has a fixing block (17) installed at its lower end. The fixing block (17) has a circular structure design. The adjusting bolt (16) is threadedly connected to the longitudinal positioning plate (15).

6. The mounting tool for a PWM rectifier according to claim 1, characterized by: The fastening assembly includes a movable sleeve (19), a limiting strip (20), a limiting groove (21), and a threaded sleeve (22). The movable sleeve (19) is fitted onto the threaded post (18). The threaded sleeve (22) is installed on the left end of the threaded post (18). The limiting strip (20) is installed on the movable sleeve (19). The limiting groove (21) is opened inside the groove (4).

7. The mounting tool for a PWM rectifier according to claim 6, characterized by: One end of the limiting strip (20) is located inside the limiting groove (21), and the limiting strip (20) is slidably connected to the limiting groove (21).

Images