CN115175481A - Shell structure and frequency converter - Google Patents

Abstract

The invention discloses a shell structure and a frequency converter, wherein the shell structure comprises: the base is provided with a mounting groove with an opening at the top, and the side part of the base is provided with an operation window communicated with the mounting groove; the mounting frame is detachably covered at the opening at the top of the mounting groove, the bottom of the mounting frame is provided with a first positioning surface, the distance from the first positioning surface to the bottom of the mounting groove is matched with the thickness of a 3p air switch, a convex hull structure is detachably arranged at the first positioning surface, the bottom of the convex hull structure is provided with a second positioning surface, and the distance from the second positioning surface to the bottom of the mounting groove is matched with the thickness of a 2p air switch; and the limiting structure comprises at least two first limiting protruding parts which are arranged at the bottom of the mounting groove at intervals and used for limiting the air switch to move left and right and at least two second limiting protruding parts which are arranged at the bottom of the mounting groove at intervals and used for limiting the air switch to move front and back. The shell structure can be compatible with a 2p air switch and a 3p air switch.

Description

Shell structure and frequency converter

Technical Field

The invention relates to the technical field of frequency converters, in particular to a shell structure and a frequency converter.

Background

In the prior art, the frequency converter usually needs an external air switch to protect the circuit, because the circuit of the external air switch is often limited by the installation environment, the difficulty of wiring is increased, therefore, there exist some frequency converters integrated with the air switch on the market, however, the types of the air switch needed under different working environments are different, specifically, a 2p air switch (two-pole air switch) needs to be used under the working environment with a voltage of 220V, a 3p air switch (three-pole air switch) needs to be used under the working environment with a voltage of 380V, considering that the size specifications of the 2p air switch and the 3p air switch are different, the thicknesses of the two air switches are different, therefore, the frequency converters integrated with the air switch need to design shell structures with different specifications for the air switches with different specifications, the production cost of the frequency converter is increased, and meanwhile, the production efficiency of the frequency converter is reduced.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the shell structure provided by the invention can be compatible with a 2p air switch and a 3p air switch, is favorable for reducing the production cost of the frequency converter and is favorable for improving the production efficiency of the frequency converter.

The invention also provides a frequency converter with the shell structure.

A case structure according to an embodiment of the first aspect of the invention includes: the air switch comprises a base, a switch body and a switch cover, wherein the base is provided with a mounting groove with an opening at the top, the mounting groove is used for mounting an air switch, and an operation window communicated with the mounting groove is arranged at the side part of the base corresponding to an operation handle of the air switch; the mounting frame is detachably covered at the opening at the top of the mounting groove and used for mounting a circuit board, a first positioning surface is arranged at the bottom of the mounting frame, the distance from the first positioning surface to the bottom of the mounting groove is matched with the thickness of a 3p air switch, a convex hull structure is detachably arranged at the first positioning surface, a second positioning surface is arranged at the bottom of the convex hull structure, and the distance from the second positioning surface to the bottom of the mounting groove is matched with the thickness of a 2p air switch; the limiting structure corresponds to the side wall of the air switch and comprises at least two first limiting protruding portions and at least two second limiting protruding portions, the two first limiting protruding portions are arranged at the bottom of the mounting groove at intervals and used for limiting the air switch to move left and right, the two second limiting protruding portions are arranged at the bottom of the mounting groove at intervals and used for limiting the air switch to move back and forth.

According to the shell structure provided by the embodiment of the invention, at least the following beneficial effects are achieved: when the 2p air switch is assembled, the 2p air switch is firstly installed in the installation groove, then the installation frame with the convex hull structure is installed at the opening at the top of the installation groove, the limit structure is used for limiting the 2p air switch to move left and right and limiting the 2p air switch to move back and forth, meanwhile, the second positioning surface at the bottom of the convex hull structure is matched with the bottom of the installation groove to limit the 2p air switch to move up and down, when the 3p air switch is assembled, the 3p air switch is firstly installed in the installation groove, then the installation frame with the convex hull structure removed is installed at the opening at the top of the installation groove, wherein the limit structure is used for limiting the 3p air switch to move left and right and limiting the 3p air switch to move back and forth, meanwhile, the first positioning surface at the bottom of the installation frame is matched with the bottom of the installation groove to limit the 2p air switch to move up and down, the shell structure can be compatible with the 2p air switch and the 3p air switch, the production cost of the frequency converter is reduced, and the production efficiency of the frequency converter is improved.

According to some embodiments of the invention, the convex hull structure is integrally formed on the mounting frame, the first positioning surface is provided with an avoidance hole corresponding to the convex hull structure, the upper part of the convex hull structure extends into the avoidance hole, and a fragile connecting structure which can be damaged by external force is formed between the upper part of the convex hull structure and the hole wall of the avoidance hole.

According to some embodiments of the invention, the frangible connection structure comprises a plurality of frangible connections breakable in response to an external force, the plurality of frangible connections being spaced apart along the side edges of the convex hull structure.

According to some embodiments of the invention, the convex hull structure is an open-topped hollow structure.

According to some embodiments of the invention, the limiting structure further comprises a limiting convex edge arranged at the bottom of the mounting rack and used for limiting the 3p air switch to move backwards, and two third limiting convex parts which are arranged at the bottom of the mounting rack at intervals and used for limiting the 3p air switch to move left and right.

According to some embodiments of the invention, the limit structure further comprises a fourth limit protrusion disposed at a lower portion of the convex hull structure and limiting the backward movement of the 2p air switch.

According to some embodiments of the invention, a cover body capable of being opened and closed rotatably is arranged at the operation window.

According to some embodiments of the present invention, an unlockable first locking structure is disposed between the base and the cover, the first locking structure can lock the cover in the closed position, the first locking structure includes a fifth limiting protrusion, the fifth limiting protrusion is disposed on a side edge of a free end of the cover, a limiting hole or a limiting groove into which the fifth limiting protrusion can be inserted is disposed at the operating window corresponding to the fifth limiting protrusion, and a handle groove for opening the cover is disposed at a side edge of the free end of the cover.

According to some embodiments of the invention, an unlockable second locking structure is arranged between the base and the cover, the second locking structure can lock the cover at a preset opening position, the second locking structure comprises a sixth limiting protruding portion, the sixth limiting protruding portion is arranged on one side of the cover, which is connected to the base, an elastic buckle is arranged at the position of the operation window, which corresponds to the sixth limiting protruding portion, and when the cover rotates to the preset opening position, the sixth limiting protruding portion can be in fit clamping with the elastic buckle to limit the cover to be closed.

A frequency converter according to an embodiment of the second aspect of the invention comprises a housing structure according to the above-described embodiment of the first aspect of the invention.

The frequency converter provided by the embodiment of the invention at least has the following beneficial effects: by applying the shell structure, the frequency converter can be compatible with a 2p air switch and a 3p air switch, the production cost of the frequency converter is reduced, and the production efficiency of the frequency converter is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a housing structure of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is a schematic structural diagram of a base according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at C;

FIG. 6 is an enlarged partial view of FIG. 4 at D;

FIG. 7 is a schematic structural diagram of a mount of an embodiment of the invention;

FIG. 8 is an enlarged partial view of FIG. 7 at E;

FIG. 9 is an enlarged view of a portion of FIG. 7 at F;

FIG. 10 is an exploded view of the housing structure of the embodiment of the present invention;

FIG. 11 is an enlarged view of a portion of FIG. 10 at G;

FIG. 12 is an enlarged partial view at H in FIG. 10;

FIG. 13 is a schematic cross-sectional view of a housing structure of an embodiment of the present invention assembled with a 2p air switch;

FIG. 14 is an enlarged view of a portion of FIG. 13 at I;

FIG. 15 is an enlarged partial view at J of FIG. 13;

FIG. 16 is a schematic cross-sectional view of a housing structure of an embodiment of the present invention with a 3p air switch assembled;

fig. 17 is a partially enlarged view of fig. 16 at K.

Reference numerals are as follows:

the base 100, the mounting groove 110, the operation window 120, the first limit protrusion 130, the second limit protrusion 140, the limit hole 150, the elastic buckle 160, the mounting frame 200, the first positioning surface 210, the convex hull structure 220, the second positioning surface 221, the fourth limit protrusion 222, the avoiding hole 230, the fragile connecting portion 240, the limit convex edge 250, the third limit protrusion 260, the cover 300, the elastic portion 310, the fifth limit protrusion 311, the handle groove 320, and the sixth limit protrusion 330.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that if an orientation description is referred to, for example, the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the invention, if several, more than, less than, more than, above, below, within, and the like, appear, wherein several means are one or more, several means are two or more, more than, less than, more than, and the like are understood as not including the present numbers, and more than, less than, more than, and the like are understood as including the present numbers.

In the description of the present invention, if the first, second, etc. terms appear, they are only used for distinguishing technical features, but are not to be interpreted as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, 4, 5, 6, 7 and 10, the housing structure according to the embodiment of the present invention includes a base 100, a mounting bracket 200 and a stopper structure.

The base 100 has open-top's mounting groove 110, mounting groove 110 is used for installing air switch, the lateral part of base 100 corresponds air switch's operating handle and is provided with the operation window 120 that communicates in mounting groove 110, mounting bracket 200 detachably covers the open-top department of locating mounting groove 110, mounting bracket 200 is used for installing the circuit board, mounting bracket 200's bottom has first locating surface 210, the distance of first locating surface 210 to the bottom of mounting groove 110 and 3p air switch's thickness looks adaptation, first locating surface 210 department detachably is provided with convex closure structure 220, the bottom of convex closure structure 220 has second locating surface 221, the distance of second locating surface 221 to the bottom of mounting groove 110 and 2p air switch's thickness looks adaptation, limiting structure corresponds air switch's lateral wall setting, limiting structure includes that two at least intervals set up in the bottom of mounting groove 110 and are used for limiting air switch's first limit bulge 130 and two at least intervals set up in the bottom of mounting groove 110 and are used for limiting air switch's second limit bulge 140 that air switch moved back and forth, specifically, first limit bulge 130 corresponds the left and right side wall setting of air switch and the second limit bulge 140 and the lateral wall and can cooperate with the mutual limit bulge 140.

When the 2p air switch is assembled, the 2p air switch is firstly installed in the installation groove 110, then the installation frame 200 with the convex hull structure 220 is installed at the opening at the top of the installation groove 110, wherein the 2p air switch is limited to move left and right through the limiting structure, and the back and forth movement of the 2p air switch is limited, meanwhile, the 2p air switch is limited to move up and down through the second positioning surface 221 at the bottom of the convex hull structure 220 matched with the bottom of the installation groove 110, when the 3p air switch is assembled, the 3p air switch is firstly installed in the installation groove 110, then the installation frame 200 with the convex hull structure 220 removed is installed at the opening at the top of the installation groove 110, wherein, the 3p air switch is limited to move left and right through the limiting structure, and the back and forth movement of the 3p air switch is limited, meanwhile, the 2p air switch and the 3p air switch are limited to move up and down through the first positioning surface 210 at the bottom of the installation frame 200 matched with the bottom of the installation groove 110, the shell structure can be compatible with the 2p air switch and the 3p air switch, the production cost of the frequency converter is reduced, and the production efficiency of the frequency converter is improved.

It should be noted that, in some embodiments, the mounting bracket 200 is connected to the base 100 by screws, but the mounting bracket 200 may also be mounted on the base 100 by a snap-fit structure, which is not limited herein.

Referring to fig. 1 and 2, in some embodiments, the convex hull structure 220 is integrally formed on the mounting frame 200, the first positioning surface 210 is provided with an avoiding hole 230 corresponding to the convex hull structure 220, the upper portion of the convex hull structure 220 extends into the avoiding hole 230, a fragile connection structure which can be damaged by external force is formed between the upper portion of the convex hull structure 220 and the hole wall of the avoiding hole 230, the mounting frame 200 with the convex hull structure 220 can be processed by only using one set of mold during production and processing, which is beneficial to further reducing the production cost of the frequency converter, and meanwhile, the production and processing processes are reduced, which is beneficial to further improving the production efficiency of the frequency converter.

Referring to fig. 2, in some embodiments, the frangible connection structure includes a plurality of frangible connection portions 240 that are breakable by an external force, and the plurality of frangible connection portions 240 are spaced apart along a side edge of the convex hull structure 220, which is simple in structure, can be formed at a time using a mold, does not require secondary processing, and is easy to remove the convex hull structure 220.

In other embodiments, the fragile connecting structure may also be an annular connecting portion formed between the convex hull structure and the hole wall of the avoiding hole, and the annular connecting portion is subjected to secondary machining to form a cut so that the annular connecting portion can be damaged when an external force is applied, which is not limited herein.

It should be noted that, in other embodiments, the frangible connection structure may also be disposed between the top of the convex hull structure and the first locating surface, which is not limited herein.

It should be noted that, in other embodiments, the convex hull structure may also be detachably disposed at the first positioning surface through a screw or a clamping structure, which is not limited herein.

Referring to fig. 1 and 2, in some embodiments, the convex hull structure 220 is a hollow structure with an open top, which is beneficial to saving materials and further reducing the production cost of the frequency converter.

Referring to fig. 7 to 11 and 16 and 17, in some embodiments, the limiting structure further includes a limiting flange 250 disposed at the bottom of the mounting bracket 200 and used for limiting the backward movement of the 3p air switch, and two third limiting protrusions 260 spaced from the bottom of the mounting bracket 200 and used for limiting the left and right movement of the 3p air switch, which is beneficial to enhancing the limiting effect on the 3p air switch.

Referring to fig. 7 to 11 and fig. 14 and 15, in some embodiments, the limiting structure further includes a fourth limiting protrusion 222 disposed at a lower portion of the convex hull structure 220 and used for limiting the backward movement of the 2p air switch, which is beneficial to enhance the limiting effect on the 2p air switch.

Referring to fig. 1, 4 and 10, in some embodiments, a cover 300 is rotatably opened and closed at the operation window 120.

Referring to fig. 1, 3, 6, 10 and 12, in some embodiments, a first locking structure capable of being unlocked is disposed between the base 100 and the cover 300, the first locking structure is capable of locking the cover 300 in the closed position, the first locking structure includes a fifth limiting protrusion 311, the fifth limiting protrusion 311 is disposed on a lateral edge of a free end of the cover 300, a limiting hole 150, into which the fifth limiting protrusion 311 can be inserted, is disposed at the operating window 120 corresponding to the fifth limiting protrusion 311, and a handle slot 320 for opening the cover 300 is disposed on a lateral edge of the free end of the cover 300, which is beneficial to preventing the cover 300 from being accidentally opened due to external factors such as vibration or collision in the closed position. Specifically, the fifth limit protrusion 311 is provided with an inclined guide surface to facilitate opening or closing of the cover 300.

It should be noted that, in other embodiments, the limiting hole 150 may be replaced by a limiting groove, which is not limited herein.

Referring to fig. 3 and 12, in some embodiments, the side edge of the cover 300 is provided with an elastic portion 310 that can be elastically deformed by an external force, and the fifth limiting protrusion 311 is disposed on the elastic portion 310 to facilitate opening or closing of the cover 300 and to facilitate reducing a gap between the cover 300 and the base 100.

Referring to fig. 13 and 15, in some embodiments, an unlockable second locking structure is disposed between the base 100 and the cover 300, the second locking structure can lock the cover 300 at a predetermined open position, the second locking structure includes a sixth limiting protrusion 330, the sixth limiting protrusion 330 is disposed on one side of the cover 300 connected to the base 100, an elastic buckle 160 is disposed at the operating window 120 corresponding to the sixth limiting protrusion 330, and when the cover 300 rotates to the predetermined open position, the sixth limiting protrusion 330 can be engaged with the elastic buckle 160 to limit the cover 300 to close, so that a user cannot be interfered by the cover 300 when pulling the operating handle of the air switch. Specifically, the sixth limiting protrusion 330 is provided with an arc-shaped guiding surface corresponding to the elastic buckle 160, so as to open or close the cover 300.

According to the embodiment of the invention, the frequency converter comprises the shell structure. By applying the shell structure, the frequency converter can be compatible with a 2p air switch and a 3p air switch, the production cost of the frequency converter is reduced, and the production efficiency of the frequency converter is improved.

In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", and "some examples", etc., reference is made to the terminology, it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A shell structure, comprising:

the air switch comprises a base (100), wherein the base (100) is provided with a mounting groove (110) with an opening top, the mounting groove (110) is used for mounting an air switch, and an operation window (120) communicated with the mounting groove (110) is arranged on the side part of the base (100) corresponding to an operation handle of the air switch;

the mounting rack (200) is detachably covered at the opening at the top of the mounting groove (110), the mounting rack (200) is used for mounting a circuit board, a first positioning surface (210) is arranged at the bottom of the mounting rack (200), the distance from the first positioning surface (210) to the bottom of the mounting groove (110) is matched with the thickness of a 3p air switch, a convex hull structure (220) is detachably arranged at the first positioning surface (210), a second positioning surface (221) is arranged at the bottom of the convex hull structure (220), and the distance from the second positioning surface (221) to the bottom of the mounting groove (110) is matched with the thickness of a 2p air switch;

the limiting structure corresponds to the side wall of the air switch and comprises at least two first limiting protruding parts (130) which are arranged at the bottom of the mounting groove (110) at intervals and used for limiting the air switch to move left and right and at least two second limiting protruding parts (140) which are arranged at the bottom of the mounting groove (110) at intervals and used for limiting the air switch to move front and back.

2. The housing structure according to claim 1, wherein the convex hull structure (220) is integrally formed on the mounting frame (200), an avoiding hole (230) is formed at the first positioning surface (210) corresponding to the convex hull structure (220), the upper portion of the convex hull structure (220) extends into the avoiding hole (230), and a fragile connecting structure which can be damaged by an external force is formed between the upper portion of the convex hull structure (220) and the hole wall of the avoiding hole (230).

3. The housing structure of claim 2, characterized in that the frangible connection structure comprises a plurality of frangible connections (240) which are breakable in response to an external force, the plurality of frangible connections (240) being spaced apart along a side edge of the convex hull structure (220).

4. The housing structure according to claim 1, characterized in that the convex hull structure (220) is an open-topped hollow structure.

5. The casing structure of claim 1, wherein the limiting structure further comprises a limiting convex edge (250) arranged at the bottom of the mounting frame (200) and used for limiting the backward movement of the 3p air switch, and two third limiting convex parts (260) which are arranged at the bottom of the mounting frame (200) at intervals and used for limiting the left and right movement of the 3p air switch.

6. The housing structure of claim 1, wherein the limiting structure further comprises a fourth limiting protrusion (222) disposed at a lower portion of the convex hull structure (220) and limiting a backward movement of the 2p air switch.

7. The housing structure according to claim 1, characterized in that a cover (300) is rotatably opened and closed at the operation window (120).

8. The housing structure according to claim 7, characterized in that a first locking structure capable of being unlocked is arranged between the base (100) and the cover (300), the first locking structure is capable of locking the cover (300) in the closed position, the first locking structure comprises a fifth limiting protrusion (311), the fifth limiting protrusion (311) is arranged on a side edge of a free end of the cover (300), a limiting hole (150) or a limiting groove into which the fifth limiting protrusion (311) can be inserted is arranged at the operating window (120) corresponding to the fifth limiting protrusion (311), and a handle groove (320) for opening the cover (300) is arranged on a side edge of the free end of the cover (300).

9. The housing structure according to claim 7, wherein a second locking structure capable of being unlocked is disposed between the base (100) and the cover (300), the second locking structure is capable of locking the cover (300) at a preset opening position, the second locking structure includes a sixth limiting protrusion (330), the sixth limiting protrusion (330) is disposed on one side of the cover (300) connected to the base (100), an elastic buckle (160) is disposed at the position of the operation window (120) corresponding to the sixth limiting protrusion (330), and when the cover (300) rotates to the preset opening position, the sixth limiting protrusion (330) is capable of being cooperatively clamped with the elastic buckle (160) to limit the cover (300) to be closed.

10. Frequency converter, characterized in that it comprises a housing structure according to any one of claims 1 to 9.

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