CN216490193U

CN216490193U - Protective housing and converter

Info

Publication number: CN216490193U
Application number: CN202122905026.9U
Authority: CN
Inventors: 郭爱军
Original assignee: SHENZHEN ALPHA INVERTER CO Ltd
Current assignee: SHENZHEN ALPHA INVERTER CO Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-05-10
Anticipated expiration: 2031-11-23

Abstract

The utility model relates to the technical field of frequency converters, in particular to a protective shell and a frequency converter, which comprise a main shell, wherein a plurality of clamping holes are formed in the side wall of the main shell; the cover plate is suitable for covering the main shell, a plurality of buckles which correspond to the clamping holes one by one are arranged on the cover plate, and the buckles are suitable for extending into the main shell and are clamped with the clamping holes; and the sealing element is arranged on the clamping hole and/or the clamping buckle and is suitable for preventing dust from entering the main shell from a gap between the clamping buckle and the inner wall of the clamping hole. The protective shell and the frequency converter provided by the utility model solve the defect that the plastic shell in the prior art is difficult to protect and is convenient to disassemble and assemble.

Description

Protective housing and converter

Technical Field

The utility model relates to the technical field of frequency converters, in particular to a protective shell and a frequency converter.

Background

The frequency converter is a power control device for controlling an alternating current motor by changing the frequency mode of a working power supply of the motor, and a protection device is required to be additionally arranged outside the frequency converter in order to ensure the operation safety of the frequency converter.

At present, most of low-power frequency converters adopt a plastic shell structure, and the plastic shell mainly has two connection and installation modes, wherein the first mode is to use a plastic buckle to connect two plastic shell parts; the second is to use screws to connect two plastic housing parts.

When the plastic shells are connected by the buckles, gaps exist at the connecting buckles, and dust is easy to enter the interior of a product from the gaps of the frequency converter in a severe dust using environment, so that the internal dust accumulation is caused to generate faults; when the plastic shell is fixed by the screws, the assembling and disassembling processes are complex, the efficiency is affected, the fixing screws are metal conductors, and high voltage and static electricity can be generated on the surfaces of the exposed screws in the running state of the frequency converter, so that safety accidents are caused.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defect that the plastic shell in the prior art is difficult to protect and is convenient to disassemble and assemble, thereby providing the protective shell and the frequency converter.

In order to solve the above technical problem, the present invention provides a protective housing, including:

the side wall of the main shell is provided with a plurality of clamping holes;

the cover plate is suitable for covering the main shell, a plurality of buckles which correspond to the clamping holes one by one are arranged on the cover plate, and the buckles are suitable for extending into the main shell and are clamped with the clamping holes;

and the sealing element is arranged on the clamping hole and/or the clamping buckle and is suitable for preventing dust from entering the main shell from a gap between the clamping buckle and the inner wall of the clamping hole.

Optionally, the sealing element is a blocking piece, the buckle is fixed on a side wall of the blocking piece, and when the buckle is clamped in the clamping hole, the blocking piece abuts against the inner wall of the main casing body.

Optionally, the inner wall of the main casing body is provided with a yielding groove, the yielding groove surrounds the outside of the clamping hole and forms a step part with the clamping hole, and the blocking piece abuts against the step part when the clamping hole is filled with the blocking piece.

Optionally, the depth of the abdicating groove is smaller than the thickness of the blocking piece.

Optionally, a gap is provided between the buckle and the buckle hole.

Optionally, a gap is formed between the blocking piece and the side wall of the avoiding groove.

Optionally, the catch has a guide surface that gradually approaches the catch in a vertically downward direction.

Optionally, the main housing, the cover plate, the buckle and the blocking piece are made of plastic materials.

A frequency converter comprises the protective shell.

The technical scheme of the utility model has the following advantages:

1. according to the protective shell provided by the utility model, when the buckle is clamped in the clamping hole, the sealing element prevents dust from entering the main shell from a gap between the buckle and the inner wall of the clamping hole; when the protective housing needs the dismouting, only need with buckle and card hole joint can, make protective housing be convenient for the dismouting when playing the guard action.

2. According to the protective shell, when the cover plate is assembled with the main shell, the guide surface of the buckle is in contact with the inner wall of the main shell to enable the buckle to deform, when the buckle enters the buckle hole, the deformation of the buckle is recovered, and at the moment, the cover plate is fixed with the main shell; when the cover plate is separated from the main shell, the buckle is pressed to separate the buckle from the clamping hole, and the cover plate is lifted upwards to separate the cover plate from the main shell, so that the operation is simple and convenient.

3. According to the protective shell, the clamping hole and the abdicating groove form the step part, when the air pressure difference between the inside and the outside of the main shell changes rapidly, the dust caused by the air pressure difference between the inside and the outside of the main shell is effectively relieved from entering the inside of the main shell through the buffering of the step part.

4. According to the protective shell, the gap is formed between the buckle and the clamping hole, and the gap is formed between the blocking piece and the side wall of the abdicating groove, so that the buckle and the blocking piece can be conveniently disassembled and assembled.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a protective casing provided in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the internal structure of the main housing;

FIG. 3 is a schematic structural diagram of a cover plate;

fig. 4 is a cross-sectional view of the assembled clip and clip hole.

Description of reference numerals:

1-a main housing; 11-a clamping hole; 12-a yield slot;

2-cover plate; 3-buckling; 4-a baffle plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The directional or positional relationships indicated by "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on the directional or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The embodiment provides a protective casing and a frequency converter.

In one embodiment, as shown in fig. 1 and 2, the device includes a main housing 1, a cover 2, and a sealing member. Wherein, a plurality of clamping holes 11 are arranged on the side wall of the main shell 1; the cover plate 2 is suitable for covering the main shell 1, a plurality of buckles 3 corresponding to the clamping holes 11 one by one are arranged on the cover plate 2, and the buckles 3 are suitable for extending into the main shell 1 and clamped with the clamping holes 11; seals are provided on the card holes 11 and/or the snaps 3, the seals being adapted to prevent dust from entering the main housing 1 from the gap between the snaps 3 and the inner walls of the card holes 11. In this embodiment, when the clip 3 is clipped in the clip hole 11, the seal prevents dust from entering the main casing 1 from the gap between the clip 3 and the inner wall of the clip hole 11; when this protective housing is used for protecting the converter main part, put into main casing body 1 with the converter main part, later with apron 2 lid on main casing body 1 and make buckle 3 card on the apron 2 go into main casing body 1 on the card hole 11 can, when needs overhaul the converter main part, only need the outside extrusion buckle 3 in card hole 11, can pull down apron 2 from main casing body 1, thereby can carry out the maintainer to the converter main part, therefore this protective housing is convenient for the dismouting when playing the guard action.

As shown in fig. 1, the protective housing has a rectangular parallelepiped shape, but the shape of the protective housing is not limited in this embodiment, and may be any shape capable of accommodating the inverter body.

On the basis of the above embodiments, in a preferred embodiment, the sealing member is the blocking piece 4, the buckle 3 is fixed on the side wall of the blocking piece 4, and when the buckle 3 is clamped in the clamping hole 11, the blocking piece 4 abuts against the inner wall of the main casing 1. In this embodiment, when the buckle 3 is clamped in the clamping hole 11, the blocking piece 4 abuts against the inner wall of the main casing 1, and dust is prevented from entering the main casing 1 from the gap between the buckle 3 and the inner wall of the clamping hole 11. In an alternative embodiment, the sealing element is a rubber ring, which is arranged around the buckle 3.

On the basis of the above embodiment, in a preferred embodiment, the inner wall of the main housing 1 is provided with a relief groove 12, the relief groove 12 surrounds the outside of the card hole 11 and forms a step portion with the card hole 11, and when the buckle 3 is clamped in the card hole 11, the blocking piece 4 abuts against the step portion. In this embodiment, the card hole 11 and the abdicating groove 12 form a step portion, when the air pressure difference between the inside and the outside of the main casing 1 changes rapidly, the dust caused by the air pressure difference between the inside and the outside of the main casing 1 is effectively prevented from entering the inside of the main casing 1 through the buffering of the step portion, and when the blocking piece 4 is tightly attached to the step portion, no gap is formed between the blocking piece 4 and the step portion, or the gap is small and smaller than 0.1mm in consideration of the processing error and the assembly error.

In addition to the above embodiments, in a preferred embodiment, the depth of the relief groove 12 is smaller than the thickness of the baffle plate 4. In this embodiment, the depth of the relief groove 12 is small, and does not affect the strength of the main casing 1.

In addition to the above embodiments, in a preferred embodiment, there is a gap between the clip 3 and the clip hole 11. In this embodiment, a gap is formed between the clip 3 and the clip hole 11, which facilitates the attachment and detachment of the clip 3.

In addition to the above embodiments, in a preferred embodiment, a gap is provided between the blocking plate 4 and the sidewall of the avoiding groove 12. In this embodiment, a gap is formed between the stopper 4 and the relief groove 12, which facilitates the mounting and dismounting of the clip 3.

On the basis of the above embodiment, in a preferred embodiment, the catch 3 has a guide surface that gradually approaches the flap 4 in a vertically downward direction. In this embodiment, when the cover plate 2 is assembled with the main housing 1, the guide surface of the clip 3 contacts the inner wall of the main housing 1 to deform the clip 3, and when the clip 3 enters the clip hole 11, the deformation of the clip 3 is recovered, and at this time, the cover plate 2 is fixed with the main housing 1; when the cover plate 2 is separated from the main casing 1, the buckle 3 is pressed to separate the buckle 3 from the clamping hole 11, and the cover plate 2 is lifted upwards to separate the cover plate 2 from the main casing 1, so that the operation is simple and convenient.

In addition to the above embodiments, in a preferred embodiment, the main housing 1, the cover plate 2, the buckle 3 and the baffle 4 are made of plastic materials. In this embodiment, the plastic is an insulating material, and can not generate static electricity in the operating state of the frequency converter, thereby being safe and reliable, and the plastic has certain elasticity, so that the buckle 3 and the baffle 4 can deform, and the disassembly and assembly of the buckle 3 and the baffle 4 are facilitated.

Example 2

The present embodiment provides a frequency converter, including the protective casing and the frequency converter main body provided in embodiment 1, where the frequency converter main body is disposed in the protective casing.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A protective case, comprising:

the side wall of the main shell (1) is provided with a plurality of clamping holes (11);

the cover plate (2) is suitable for covering the main shell (1), a plurality of buckles (3) corresponding to the clamping holes (11) one by one are arranged on the cover plate (2), and the buckles (3) are suitable for extending into the main shell (1) and clamped with the clamping holes (11);

and the sealing element is arranged on the clamping hole (11) and/or the buckle (3) and is suitable for preventing dust from entering the main shell (1) from a gap between the buckle (3) and the inner wall of the clamping hole (11).

2. A protective casing according to claim 1, wherein the sealing member is a blocking piece (4), the buckle (3) is fixed on the side wall of the blocking piece (4), and when the buckle (3) is buckled in the buckle hole (11), the blocking piece (4) is abutted against the inner wall of the main casing (1).

3. The protective casing according to claim 2, wherein an abdicating groove (12) is formed on the inner wall of the main casing (1), the abdicating groove (12) surrounds the outside of the clamping hole (11) and forms a step part with the clamping hole (11), and when the buckle (3) is clamped in the clamping hole (11), the blocking piece (4) abuts against the step part.

4. A protective casing according to claim 3, wherein the depth of the relief groove (12) is less than the thickness of the flap (4).

5. A protective casing according to claim 3, characterised in that there is a gap between the catch (3) and the catch hole (11).

6. A protective casing according to claim 5 characterised in that the flaps (4) are spaced from the side walls of the rebate slots (12).

7. A protective casing according to any one of claims 2-6, characterised in that the catch (3) has a guide surface which, in the vertically downward direction, comes closer to the flap (4).

8. The protective casing according to any one of claims 2-6, wherein the main casing (1), the cover plate (2), the buckle (3) and the blocking piece (4) are made of plastic.

9. Frequency converter, characterized in that it comprises a protective casing according to any one of claims 1 to 8.