High-voltage frequency converter unit with rollers

Abstract

The utility model belongs to the technical field of electrical engineering, and particularly relates to a high-voltage frequency converter unit with rollers, which comprises a frequency converter unit and a roller unit, and is characterized in that the lower surface of a shell of the frequency converter unit is at least provided with mounting holes, and the four mounting holes respectively correspond to four right angles of the lower surface of the shell; one roller unit is provided with a connecting part matched with one mounting hole, the connecting part comprises a fixed part and a movable part, the movable part and the fixed part are fixedly connected through an elastic piece, and the moving direction of the movable part relative to the fixed part is parallel to a wheel shaft of a wheel of the roller unit; according to the utility model, the detachable roller unit is arranged on the lower surface of the shell (housing) of the frequency converter unit, so that the high-voltage frequency converter unit which is convenient to install in the electric control cabinet is designed, and the roller unit is also convenient to install on the shell of the frequency converter unit; the problem that an existing high-voltage frequency converter unit is inconvenient to install in an electric control cabinet is solved.

Description

Technical Field

[0001] This application belongs to the field of electrical engineering technology, specifically a high-voltage frequency converter unit with rollers. Background Technology

[0002] The high-voltage frequency converter unit is very heavy. During installation, it needs to be lifted with a forklift to the same height as the rail supporting the high-voltage frequency converter unit inside the electrical control cabinet. Then, it needs to be pushed manually from the forklift forks onto the rail. During the pushing process, the surface of the rail and the bottom surface of the high-voltage frequency converter unit are in surface contact, resulting in high friction, which makes pushing difficult. Utility Model Content

[0003] The purpose of this application is to address the shortcomings of existing technologies by designing a high-voltage frequency converter unit that is easy to install into an electrical control cabinet by setting a detachable roller unit on the lower surface of the inverter unit's housing (outer shell). This also makes it easy to install the roller unit on the inverter unit's housing, thus solving the problem that current high-voltage frequency converter units are inconvenient to install into electrical control cabinets.

[0004] To achieve the above objectives, the technical solution adopted in this application is:

[0005] A high-voltage frequency converter unit with rollers includes a frequency converter unit and a roller unit. The lower surface of the housing of the frequency converter unit is provided with at least one mounting hole, and the four mounting holes are respectively located at the four right angles of the lower surface of the housing. Each roller unit is provided with a connecting part that mates with one of the mounting holes. The connecting part includes a fixed part and a movable part. The movable part and the fixed part are fixedly connected by an elastic element. The direction of movement of the movable part relative to the fixed part is parallel to the axle of the wheel of the roller unit.

[0006] Preferably, the roller unit includes a connecting plate, a fixed part, a movable part, and a wheel. The wheel is disposed on the front side of the connecting plate, and the wheel axle is parallel to the connecting plate. The fixed part and the movable part are disposed on the back side of the connecting plate. The connecting line segment A between the fixed part and the movable part is parallel to the wheel axle. The shape and size of the connecting plate are larger than the shape and size of the mounting hole. The length of the connecting line segment B between opposite sides of the fixed part is equal to the distance between opposite sides of the mounting hole. The connecting line segment B and the connecting line segment A are perpendicular to each other and lie in the same plane.

[0007] Preferably, the movable part is slidably connected to the connecting plate.

[0008] Preferably, the fixed part has a first protrusion on the side facing away from the movable part and the movable part has a first protrusion on the side facing away from the fixed part, and there is a preset gap between the first protrusion and the connecting plate.

[0009] Preferably, on the side of the fixed part facing away from the movable part, a second protrusion is provided between the first protrusion on the fixed part and the connecting plate, and a preset gap exists between the second protrusion on the fixed part and the connecting plate; on the side of the movable part facing away from the fixed part, a second protrusion is provided between the first protrusion on the movable part and the connecting plate, and a preset gap exists between the second protrusion on the movable part and the connecting plate.

[0010] Preferably, the connecting plate is provided with a slot that extends through the front and back of the connecting plate, the length direction of the slot is parallel to the connecting line segment A, and the movable part is located between the two ends of the slot.

[0011] Preferably, the upper surface of the connecting plate is provided with a sliding groove, the length line of the sliding groove is parallel to the connecting line segment A, a slider is slidably connected between the two ends of the sliding groove, and the lower end of the movable part is fixedly connected to the slider.

[0012] Preferably, the elastic element is a spring.

[0013] Compared with the prior art, this application has the following beneficial effects:

[0014] 1. This application adopts a method of setting a detachable roller unit on the lower surface of the housing (outer shell) of the frequency converter unit, and designs a high-voltage frequency converter unit that is easy to install into the electrical control cabinet. It is also easy to install the roller unit on the housing of the frequency converter unit, thus solving the problem that the current high-voltage frequency converter unit is inconvenient to install into the electrical control cabinet.

[0015] 2. In this application, during the installation of the roller unit onto the housing, the movable part is first pressed towards the fixed part, bringing it close to the fixed part. Then, the fixed and movable parts of the roller unit are inserted into the housing through the mounting hole from outside the housing 1. Subsequently, the fixed and movable parts, under the action of the elastic element, fill the mounting hole, meaning the outer wall of the connection formed by the fixed and movable parts abuts against the inner wall of the mounting hole, thus preventing the roller unit from falling out of the mounting hole. This method eliminates the need for bolts or welding to install the roller unit onto the housing. Furthermore, if the inverter unit housing is damaged, the roller unit can be removed and used on another inverter unit. This method also makes the installation of the roller unit onto the housing very quick; it only requires pressing the fixed and movable parts together and inserting them into the mounting hole, followed by pressing them into contact, which is very convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this application;

[0017] Figure 2 This is a schematic diagram of the roller unit.

[0018] Figure 3 for Figure 2 A schematic diagram of the bottom structure;

[0019] Figure 4 A schematic diagram illustrating the distance between the fixed part and the movable part, as well as the virtual connecting line segment B and connecting line segment A;

[0020] Figure 5 for Figure 4 Exploded view;

[0021] Figure 6 A partial cross-sectional view illustrating the relationship between the roller unit and the housing;

[0022] Figure 7 A schematic diagram illustrating the mounting holes on the housing;

[0023] Figure 8 This is a schematic diagram of the application being installed inside the electrical control cavity.

[0024] The components are as follows: 1. Housing; 2. Mounting hole; 3. Fixing part; 4. Moving part; 5. Wheel; 6. Connecting plate; 7. Connecting line segment A; 8. Connecting line segment B; 9. First protrusion; 10. Second protrusion; 11. Groove; 12. Slide groove; 13. Spring; 14. Slider; 15. Slide rod; 16. Slide hole; 17. Limit nut; 18. Electrical control cabinet; 19. Track. Detailed Implementation

[0025] like Figure 1-8 As shown, a high-voltage frequency converter unit with rollers includes a frequency converter unit and a roller unit. The lower surface of the housing 1 of the frequency converter unit is provided with at least one mounting hole 2. The four mounting holes 2 are respectively located at the four right angles of the lower surface of the housing 1. Each roller unit is provided with a connecting part that mates with one of the mounting holes 2. The connecting part includes a fixed part 3 and a movable part 4. The movable part 4 is fixedly connected to the fixed part 3 by an elastic element. The direction in which the movable part 4 moves relative to the fixed part 3 is parallel to the axle of the wheel 5 of the roller unit.

[0026] In this embodiment, the mounting hole 2 facilitates the installation of the roller unit on the lower surface of the housing 1. During installation, the movable part 4 is first pressed towards the fixed part 3, so that the movable part 4 is close to the fixed part 3. Then, the fixed part 3 and the movable part 4 on the roller unit are inserted into the housing 1 from the outside of the housing 1 through the mounting hole 2. After that, the fixed part 3 and the movable part 4 will fill the mounting hole 2 under the action of the elastic member. That is, the outer wall of the connecting part formed by the fixed part 3 and the movable part 4 will abut against the inner wall of the mounting hole 2, thereby preventing the roller unit from falling out of the mounting hole 2. Afterwards, before installing the inverter unit into the electrical control cabinet 18, the inverter unit is lifted by a forklift. At this time, since the roller unit is set at the four right angles on the lower surface of the housing 1, the forklift forks can contact the part of the lower surface of the housing 1 where the roller unit is not set, and then the wheels 5 contact the track 19 inside the electrical control cabinet 18 for installing the inverter unit. Then, the inverter unit is pushed manually. At this time, since the inverter unit is in contact with the upper surface of the track 19 through the wheels 5, the friction is small, making it easy to push.

[0027] In a preferred embodiment, the roller unit includes a connecting plate 6, a fixed part 3, a movable part 4, and a wheel 5. The wheel 5 is disposed on the front side of the connecting plate 6, and the axle of the wheel 5 is parallel to the connecting plate 6. The fixed part 3 and the movable part 4 are disposed on the back side of the connecting plate 6. The connecting line segment A7 between the fixed part 3 and the movable part 4 is parallel to the axle of the wheel 5. The shape and size of the connecting plate 6 are larger than the shape and size of the mounting hole 2, so that after the connecting part is inserted into the mounting hole 2, the wheel 5 cannot be stopped due to the presence of the connecting plate 6. After entering the housing 1, and with the roller unit installed, the connecting plate 6 can also support the weight of the inverter unit. The length of the connecting line segment B8 between the opposite sides of the fixing part 3 is equal to the distance between the opposite sides of the mounting hole 2. This means that after the connecting part is inserted into the mounting hole 2, the side walls of the connecting part facing the wheel axle of the wheel 5 abut against the side walls of the mounting hole 2. This prevents the roller unit from shaking during the pushing of the inverter unit. The connecting line segment B8 and the connecting line segment A7 are perpendicular to each other and are in the same plane.

[0028] As a preferred embodiment, the movable part 4 is slidably connected to the connecting plate 6. This prevents the movable part 4 from detaching from the connecting plate 6.

[0029] As a preferred embodiment, both the fixed part 3 and the movable part 4 are provided with a first protrusion 9 on the side opposite to the fixed part 3, and a predetermined gap exists between the first protrusion 9 and the connecting plate 6. With this arrangement, the bottom wall of the housing 1 is clamped by the first protrusion 9 and the connecting plate 6, meaning the distance between the first protrusion 9 and the connecting plate 6 is equal to the thickness of the bottom wall of the housing 1, thus ensuring stable installation of the roller unit.

[0030] As a preferred embodiment, a second protrusion 10 is provided on the side of the fixed part 3 facing away from the movable part 4, between the first protrusion 9 on the fixed part 3 and the connecting plate 6, with a predetermined gap between the second protrusion 10 on the fixed part 3 and the connecting plate 6; a second protrusion 10 is also provided on the side of the movable part 4 facing away from the fixed part 3, between the first protrusion 9 on the movable part 4 and the connecting plate 6, with a predetermined gap between the second protrusion 10 on the movable part 4 and the connecting plate 6. With this arrangement, the first protrusion 9 and the second protrusion 10 clamp the bottom wall of the housing 1, thereby making the installation of the roller unit more stable (e.g., Figure 6 As shown), with this setting, the weight of the inverter unit falls on the second protrusion 10.

[0031] As a preferred embodiment, the connecting plate 6 is provided with a slot 11, which extends through the front and back of the connecting plate 6. The length direction of the slot 11 is parallel to the connecting line segment A7, and the movable part 4 is located between the two ends of the slot 11. This slot 11 design allows the movable part 4 to be moved towards the fixed part 3 by inserting a pry bar into the slot 11 during the process of pushing the movable part 4 towards the fixed part 3. The slot 11 is not directly above the axle of the wheel 5, because if the slot 11 were directly above the axle of the wheel 5, it would be inconvenient to insert a pry bar into the slot 11 to move the movable part 4 (of course, this is just inconvenient, not impossible). In other words, without this design, when the movable part 4 needs to be moved by prying with a pry bar during the installation of the roller unit, the wheel 5 would need to be removed.

[0032] As a preferred embodiment, the upper surface of the connecting plate 6 is provided with a groove 12, the length line of the groove 12 being parallel to the connecting line segment A7, and a slider 14 being slidably connected between the two ends of the groove 12. The lower end of the movable part 4 is fixedly connected to the slider 14. By setting the groove 12 and the slider 14 in cooperation, the movable part 4 will not detach from the connecting plate 6.

[0033] As a preferred embodiment, the elastic element is a spring 13.

[0034] Preferably, a slide rod 15 is fixedly mounted on the fixed part 3, the slide rod 15 being parallel to the axle of the wheel 5. A spring 13 is coaxially sleeved between the two ends of the slide rod 15. The movable part 4 is provided with a sliding hole 16 that mates with the slide rod 15. This ensures that when the movable part 4 is installed, it is positioned between the two ends of the slide rod 15, while the spring 13 is positioned between the movable part 4 and the fixed part 3. A limiting nut 17 is fixedly mounted on the side of the movable part 4 facing away from the fixed part 3 at the end of the slide rod 15 to prevent the movable part 4 from detaching from the slide rod 15. The slide rod 15 serves two purposes: facilitating the installation of the spring 13 and restricting the movement direction of the movable part 4 relative to the fixed part 3, thus acting as a guide.

Claims

1. A high-voltage frequency converter unit with rollers, characterized in that, The device includes a frequency converter unit and a roller unit. The lower surface of the housing (1) of the frequency converter unit is provided with at least one mounting hole (2). The four mounting holes (2) are respectively located at the four right angles of the lower surface of the housing (1). One of the roller units is provided with a connecting part that cooperates with one of the mounting holes (2). The connecting part includes a fixed part (3) and a movable part (4). The movable part (4) and the fixed part (3) are fixedly connected by an elastic element. The direction in which the movable part (4) moves relative to the fixed part (3) is parallel to the axle of the wheel (5) of the roller unit.

2. A high-voltage frequency converter unit with rollers according to claim 1, characterized in that, The roller unit includes a connecting plate (6), a fixed part (3), a movable part (4), and a wheel (5). The wheel (5) is arranged on the front side of the connecting plate (6), and the axle of the wheel (5) is parallel to the connecting plate (6). The fixed part (3) and the movable part (4) are arranged on the back side of the connecting plate (6). The connecting line segment A (7) between the fixed part (3) and the movable part (4) is parallel to the axle of the wheel (5). The shape and size of the connecting plate (6) are larger than the shape and size of the mounting hole (2). The length of the connecting line segment B (8) between the opposite sides of the fixed part (3) is equal to the distance between the opposite sides of the mounting hole (2). The connecting line segment B (8) and the connecting line segment A (7) are perpendicular to each other and are in the same plane.

3. A high-voltage frequency converter unit with rollers according to claim 2, characterized in that, The movable part (4) is slidably connected to the connecting plate (6).

4. A high-voltage frequency converter unit with rollers according to claim 2, characterized in that, The fixed part (3) is provided with a first protrusion (9) on the side opposite to the movable part (4) and the movable part (4) is provided with a first protrusion (9) on the side opposite to the fixed part (3), and there is a preset gap between the first protrusion (9) and the connecting plate (6).

5. A high-voltage frequency converter unit with rollers according to claim 4, characterized in that, On the side of the fixed part (3) facing away from the movable part (4), a second protrusion (10) is provided between the first protrusion (9) on the fixed part (3) and the connecting plate (6), and there is a preset gap between the second protrusion (10) on the fixed part (3) and the connecting plate (6); on the side of the movable part (4) facing away from the fixed part (3), a second protrusion (10) is provided between the first protrusion (9) on the movable part (4) and the connecting plate (6), and there is a preset gap between the second protrusion (10) on the movable part (4) and the connecting plate (6).

6. A high-voltage frequency converter unit with rollers according to any one of claims 2-5, characterized in that, The connecting plate (6) is provided with a slot (11), which penetrates the front and back of the connecting plate (6). The length direction line of the slot (11) is parallel to the connecting line segment A (7), and the movable part (4) is located between the two ends of the slot (11).

7. A high-voltage frequency converter unit with rollers according to claim 3, characterized in that, The upper surface of the connecting plate (6) is provided with a sliding groove (12), the length line of the sliding groove (12) is parallel to the connecting line segment A (7), and a slider (14) is slidably connected between the two ends of the sliding groove (12). The lower end of the movable part (4) is fixedly connected to the slider (14).

8. A high-voltage frequency converter unit with rollers according to any one of claims 1-5, characterized in that, The elastic element is a spring (13).

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