Frequency converter shell structure

Abstract

The utility model discloses a frequency converter housing structure, comprising an upper housing and a lower housing which are fixedly connected, an upper port of the lower housing is provided with a circuit board, a wiring terminal of the circuit board is exposed, the lower housing is internally provided with a fan placing cavity, one end of the upper housing corresponding to the wiring terminal is provided with a concave cavity, and the other end of the upper housing corresponding to the wiring terminal is provided with a fan. A terminal cover plate is detachably installed between the inner walls of the two sides of the concave cavity and used for protecting the wiring terminal from the outer side, an opening is formed in the position, corresponding to the fan containing cavity, of the bottom face of the lower shell, and a fan cover plate is detachably installed on the bottom face of the lower shell. According to the utility model, on the basis of not influencing normal wiring, the exposed wiring terminal can be effectively protected, and the service life of the wiring terminal can be prolonged; in addition, the internal fan can be detached only by detaching the fan cover plate, the fan does not need to be detached after the upper shell and the circuit board are sequentially detached, operability is improved, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a frequency converter housing structure. Background Art

[0002] As a common electronic device, a frequency converter mainly consists of electronic components such as rectification (AC to DC), filtering, inversion (DC to AC), braking unit, drive unit (IGBT module), detection unit, and microprocessing unit.

[0003] The housing of the frequency converter, as the main structure of the frequency converter, serves to install the above-mentioned electronic components and protect these electronic components. Usually, the housing of the frequency converter mainly includes an upper housing and a lower housing that are fixedly connected to each other. A circuit board integrated with the above-mentioned electronic components is installed at the upper port of the lower housing. The circuit board usually covers the upper port of the lower housing. High-power electronic components on the circuit board, such as capacitors, drive units (IGBT modules), etc., often extend downward into the lower housing. To improve the heat dissipation performance of these high-power electronic components, a fan installation cavity is usually provided at one end of the housing, a fan is installed therein, and ventilation holes are provided on the side wall of the lower housing. By using the drainage effect during the operation of the fan, external air is introduced into the lower housing, and the heat is taken away and then discharged. During the long-term use of the fan, a large amount of dust will inevitably accumulate on its fan blades and needs to be cleaned regularly. Moreover, when the fan fails or is damaged, it is necessary to first remove the upper housing and then the circuit board before the fan below can be taken out, which is obviously inconvenient to operate. In addition, in order to facilitate wiring, the wiring terminals of the circuit board need to be exposed, which will obviously affect the service life of the wiring terminals. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and provide a frequency converter housing structure that can effectively protect the exposed wiring terminals on the basis of not affecting normal wiring, so as to be beneficial to improving the service life of the wiring terminals; in addition, it is convenient to remove the internal fan to improve the operability.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A frequency converter housing structure includes an upper housing and a lower housing that are fixedly connected to each other. A circuit board is installed at the upper port of the lower housing, and the wiring terminals of the circuit board are exposed. A fan installation cavity is provided inside the lower housing. It is characterized in that: the upper housing is provided with a concave cavity at one end corresponding to the wiring terminals, and a terminal cover plate is detachably installed between the two inner walls of the concave cavity for protecting the wiring terminals from the outside. An opening is provided at the bottom surface of the lower housing at a position corresponding to the fan installation cavity, and a fan cover plate is detachably installed.

[0007] Further, a transverse clamping rib is integrally connected to the rear inner wall of the concave cavity, and a buckle cooperating with the transverse clamping rib is integrally connected to the rear side of the terminal cover plate.

[0008] Further, vertical convex ribs are integrally connected to the inner walls on both sides of the concave cavity, and vertical grooves cooperating with the vertical convex ribs are respectively provided on both sides of the terminal cover plate.

[0009] Further, screw holes are respectively provided on the bottom surface of the lower housing on both sides of the opening, mounting seats are integrally connected to both sides of the fan cover plate, and through holes penetrating through the upper and lower surfaces thereof are provided on the mounting seats.

[0010] Further, an insertion slot extending along the width direction of the lower housing is provided on the bottom surface of the lower housing for inserting a track mounting seat. A limiting block is integrally connected to the inner wall on one side of the insertion slot close to the fan cover plate for limiting one side of the track mounting seat; a clamping slot is provided on the bottom surface of the lower housing on the side far from the fan cover plate, and a clamping pressure plate is clamped in the clamping slot, and the clamping pressure plate clamps the other side of the track mounting seat.

[0011] Further, a window is provided at the front end of the clamping pressure plate, an inverted V-shaped buckle is integrally connected to the inner edge at the rear side of the window, a convex column is integrally connected to the bottom surface of the clamping slot, and the inverted V-shaped buckle is clamped on the convex column for clamping the clamping pressure plate in the clamping slot.

[0012] Further, mounting holes are respectively provided at the four corners of the bottom of the lower housing.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model installs a detachable terminal cover plate outside the exposed wiring terminal, which can play an effective protective role on the basis of not affecting normal wiring, and is beneficial to improving the service life of the wiring terminal; in addition, the present utility model provides an opening at the bottom of the lower housing and installs a detachable fan cover plate. When it is necessary to clean, maintain or replace the fan, only the fan cover plate needs to be removed to remove the internal fan, without first removing the upper housing and the circuit board in sequence and then removing the fan, which improves the operability and is convenient and fast.

[0015] 2. The present utility model provides two installation structures, that is, mounting holes are respectively provided at the four corners of the bottom of the lower housing and a track mounting seat is inserted into the lower housing, and a limiting block and a clamping pressure plate are provided to realize the limitation and fixation of the track mounting seat, which can be applicable to various installation modes and improves the convenience of installing the frequency converter. Description of the Drawings

[0016] Figure 1 This is a schematic structural diagram of the present utility model.

[0017] Figure 2 This is a schematic structural diagram of the upper housing in the present utility model Figure 1 。

[0018] Figure 3 This is a schematic structural diagram of the upper housing in the present utility model Figure 2 。

[0019] Figure 4 is Figure 3 an enlarged schematic structural diagram of part A in

[0020] Figure 5 is Figure 3 an enlarged schematic structural diagram of part B in

[0021] Figure 6 This is a schematic structural diagram of the terminal cover plate in the present utility model.

[0022] Figure 7 This is a schematic structural diagram of the lower housing in the present utility model Figure 1 。

[0023] Figure 8 This is a schematic structural diagram of the lower housing in the present utility model Figure 2 。

[0024] Figure 9 is Figure 7 a partial schematic structural diagram of

[0025] Figure 10 This is a schematic structural diagram of the fan cover plate in the present utility model.

[0026] Figure 11 This is a schematic structural diagram of the buckle plate in the present utility model. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] See Figure 1-11, a frequency converter housing structure, including an upper housing 1 and a lower housing 2 fixedly connected to each other. A circuit board is installed at the upper port of the lower housing 2, and the wiring terminals 3 of the circuit board are exposed. A fan placement cavity 4 is provided inside the lower housing 2. At one end of the upper housing 2 corresponding to the wiring terminals, there is a concave cavity 5. A terminal cover plate 6 is detachably installed between the two inner walls of the concave cavity 5 for protecting the wiring terminals 3 from the outside. An opening is provided on the bottom surface of the lower housing 2 at a position corresponding to the fan placement cavity 4, and a fan cover plate 7 is detachably installed.

[0029] In the present utility model, a horizontal clamping rib 8 is integrally connected to the rear inner wall of the concave cavity 5, and a buckle 9 that cooperates with the horizontal clamping rib 8 is integrally connected to the rear side of the terminal cover plate 6.

[0030] In the present utility model, vertical convex ribs 10 are integrally connected to the two inner walls of the concave cavity 5, and vertical grooves 11 that cooperate with the vertical convex ribs 10 are respectively provided on the two sides of the terminal cover plate 6.

[0031] Thus, after completing the wiring of the wiring terminals 3, the terminal cover plate 6 is pressed inward from the outside until the buckle 9 is clamped with the horizontal clamping rib 8. At this time, the vertical convex ribs 10 on both sides are respectively clamped into the vertical grooves 11 on both sides to fix the terminal cover plate 6 between the two inner walls of the concave cavity 5 and play a role in protecting the wiring terminals 3 from the outside.

[0032] In the present utility model, screw holes are respectively provided on both sides of the opening on the bottom surface of the lower housing 2. Mounting seats 12 are integrally connected to both sides of the fan cover plate 7, and through holes 13 penetrating through its upper and lower surfaces are provided on the mounting seats 12.

[0033] Thus, a screw is inserted into the through hole 13, and then the screw is rotated so that the screw is screwed into the screw hole. After tightening the screw, the fan cover plate 7 can be fixed in the opening.

[0034] Conversely, loosen and remove the screw, and after removing the fan cover plate 7, the internal fan can be removed.

[0035] In the present utility model, an insertion slot 14 extending along the width direction is provided on the bottom surface of the lower housing 2 for inserting a track mounting seat. A limiting block 15 is integrally connected to the inner wall of the insertion slot 14 on the side close to the fan cover plate 7 for limiting one side of the track mounting seat; a clamping groove is provided on the bottom surface of the lower housing 2 on the side far from the fan cover plate, and a clamping pressure plate 16 is clamped in the clamping groove. The clamping pressure plate 16 is clamped on the other side of the track mounting seat to limit and fix the track mounting seat.

[0036] In the present utility model, a window 17 is provided at the front end of the buckle plate 16. An inverted V-shaped buckle 18 is integrally connected to the inner edge at the rear side of the window 17. A convex column 19 is integrally connected to the bottom surface of the card slot. The inverted V-shaped buckle 18 is snapped onto the convex column 19, thereby realizing the snap-fitting of the buckle plate 16 into the card slot.

[0037] In the present utility model, mounting holes 20 are respectively provided at the four corners of the bottom of the lower housing 2, thereby realizing the installation of the entire frequency converter.

[0038] The following further describes the present utility model in conjunction with the accompanying drawings:

[0039] During assembly, after the circuit board and the electronic components thereon are installed, the upper housing 1 and the lower housing 2 are fixedly connected by screws.

[0040] Then, after the wiring of the terminal block 3 is completed, the terminal cover plate 6 is pressed inward from the outside until the buckle 9 is snapped onto the horizontal card rib 8. At this time, the vertical convex ribs 10 on both sides are respectively snapped into the vertical grooves 11 on both sides, thereby realizing the fixation of the terminal cover plate 6 between the inner walls on both sides of the cavity 5, playing a role in protecting the terminal block 3 from the outside. At this time, the wiring can naturally fill the gap between the terminal cover plate 6 and the bottom surface of the cavity 5, preventing dust and water from entering, which is beneficial to improving the service life of the terminal block 3.

[0041] When installing the entire frequency converter, there are two installation modes:

[0042] One is to insert a screw into the mounting hole 20 and then rotate the screw so that the screw is screwed into the corresponding screw hole. After tightening the screw, the fixed installation of the entire frequency converter can be realized.

[0043] The other is to push the track mounting seat inward from the outside into the insertion slot 14. After it is in place, the buckle plate 16 is snap-fitted into the card slot. At this time, the limiting block 15 limits one side of the track mounting seat, and the buckle plate 16 buckles on the other side of the track mounting seat, realizing the limiting and fixing of the track mounting seat.

[0044] After the assembly of the entire frequency converter and the track mounting seat is completed, the track mounting seat is fixedly installed at the corresponding position, and the fixed installation of the entire frequency converter can be realized.

[0045] When the fan needs to be cleaned, maintained or replaced, only need to loosen and remove the screw, and after removing the fan cover plate 7, the internal fan can be removed. There is no need to first remove the upper housing 1 and the circuit board in sequence and then remove the fan, thus improving the operability, which is convenient and fast.

[0046] Although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0047] Therefore, the above description is only a preferred embodiment of the present application and is not used to limit the scope of implementation of the present application; that is, all equivalent transformations made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A frequency converter housing structure, comprising an upper housing and a lower housing fixedly connected to each other. A circuit board is installed at the upper port of the lower housing, and the wiring terminals of the circuit board are exposed. A fan placement cavity is provided inside the lower housing, and it is characterized in that: One end of the upper shell corresponding to the wiring terminal is provided with a concave cavity. A terminal cover plate is detachably installed between the inner walls on both sides of the concave cavity for protecting the wiring terminal from the outside. An opening is provided on the bottom surface of the lower shell corresponding to the fan placement cavity, and a fan cover plate is detachably installed.

2. The structure of a frequency converter housing according to claim 1, characterized in that: A horizontal clamping edge is integrally connected to the inner wall at the rear side of the concave cavity, and a buckle cooperating with the horizontal clamping edge is integrally connected to the rear side of the terminal cover plate.

3. A frequency converter housing structure according to claim 1 or 2, characterized in that: Vertical convex ribs are integrally connected to the inner walls on both sides of the concave cavity, and vertical grooves cooperating with the vertical convex ribs are respectively provided on both sides of the terminal cover plate.

4. A frequency converter housing structure according to claim 1, characterized in that: Screw holes are respectively provided on both sides of the opening on the bottom surface of the lower shell. Mounting seats are integrally connected to both sides of the fan cover plate respectively, and through holes penetrating the upper and lower surfaces thereof are provided on the mounting seats.

5. The structure of a frequency converter housing according to claim 1, wherein: An insertion slot extending along the width direction of the lower shell is provided on the bottom surface of the lower shell for inserting a track mounting seat. A limiting block is integrally connected to the inner wall on one side of the insertion slot close to the fan cover plate for limiting one side of the track mounting seat; a clamping slot is provided on the bottom surface of the lower shell on the side far from the fan cover plate, and a buckle pressing plate is clamped in the clamping slot, and the buckle pressing plate presses on the other side of the track mounting seat.

6. A frequency converter housing structure according to claim 5, characterized in that: A window is provided at the front end of the buckle pressing plate. An eight-shaped buckle is integrally connected to the inner edge at the rear side of the window. A convex column is integrally connected to the bottom surface of the clamping slot, and the eight-shaped buckle is clamped on the convex column for clamping the buckle pressing plate in the clamping slot.

7. A frequency converter housing structure according to claim 1, characterized in that: Mounting holes are respectively provided at the four corners of the bottom of the lower shell.

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