Protective shell for frequency converter

Abstract

The protective shell comprises a cover plate and a shell body, the cover plate and the shell body are installed through a clamping assembly, the position, corresponding to the clamping assembly, of the shell body is provided with a bayonet, the clamping assembly comprises fixing plates, an elastic support, a limiting plate, a rectangular frame and a clamping block, and the fixing plates are symmetrically distributed on the two sides of the interior of the cover plate in the width direction. Elastic supports are symmetrically arranged on the surfaces of the sides, away from each other, of the fixing plates, and limiting plates are arranged on the end faces, away from the fixing plates, of the elastic supports, so that clamping blocks and rectangular frames are correspondingly inserted into the clamping openings and the concentric-square-shaped grooves, and the cover plate and the shell are fixedly installed in a clamped mode; dust is further prevented from entering, one side of the inner wall of the concentric-square-shaped groove is covered and attached through the limiting plate, the dustproof effect is further achieved, the dustproof effect is different from the single bayonet and clamping block insertion sealing dustproof mode in the prior art, and the sealing dustproof effect of the frequency converter shell is improved.

Description

Technical Field

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

[0002] The frequency converter is a power control device that controls the AC motor by changing the frequency of the motor's working power supply. To ensure the safe operation of the frequency converter, a protective device must be installed outside the frequency converter.

[0003] Publication (Announcement) No.: CN216490193U, a protective housing and a frequency converter, comprising a main housing, a plurality of clamping holes are provided on the side wall of the main housing; a cover plate, the cover plate is suitable for covering the main housing, a plurality of clamps corresponding to the clamping holes are provided on the cover plate, the clamps are suitable for extending into the main housing and clamping with the clamping holes; a sealing member is provided on the clamping holes and / or the clamping members, the sealing member is suitable for preventing dust from entering the main housing from the gap between the clamping members and the inner wall of the clamping holes;

[0004] The prior art has poor dustproof effect and single dustproof effect. With long-term use, dust easily enters the connection between the bayonet and the card block, causing electrostatic damage to the inverter components inside the shell. Therefore, it is necessary to provide a protective shell for the inverter. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a protective housing for a frequency converter, the purpose of which is to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a protective shell for a frequency converter, including a cover plate and a shell. The cover plate and the shell are installed by a snap-on assembly. The shell is provided with a snap-on opening corresponding to the position of the snap-on assembly. The snap-on opening assembly includes a fixing plate, an elastic bracket, a limiting plate, a rectangular frame, and a clamping block. The inside of the cover plate is symmetrically distributed with fixing plates on both sides along the width direction. The length direction of the fixing plate is parallel to the length direction of the cover plate, and the fixing plate extends out of the cover plate. The fixed plates are symmetrically provided with elastic brackets on one side surface away from each other. The end surface of the elastic bracket away from the fixing plate is provided with a limiting plate. The middle part of the limiting plate is provided with a rectangular frame coaxially arranged therewith. The surface of the limiting plate inside the rectangular frame is provided with a clamping block. The clamping block is abutted by the elastic bracket to make the clamping block inserted into the snap-on opening. A return groove is provided on the shell surface in the outer circumferential direction of the snap-on opening. When the clamping block is inserted into the inside of the snap-on opening, the rectangular frame is inserted into the return groove.

[0007] Preferably, the bayonet and the card block are arranged in one-to-one correspondence, and the number is set to two.

[0008] Preferably, the limiting plate is arranged to cover the return groove.

[0009] Preferably, a heat dissipation opening is provided in the circumference of the shell, and a dustproof structure is provided on the heat dissipation opening.

[0010] Preferably, a sealing gasket is provided on the circumferential surface where the cover plate contacts the housing.

[0011] In summary, the utility model provides a protective shell for a frequency converter, which penetrates deep into the shell through a fixed plate, and the card block slides against the inside of the shell through the elastic action of an elastic bracket, and the card block slides into the card slot, and the rectangular frame is inserted into the return groove, so that the card block and the rectangular frame are correspondingly inserted into the card slot and the return groove, so that the cover plate and the shell are fixedly installed by card connection, and the rectangular frame is plugged into the return groove to further prevent the entry of dust, and the dust-proof effect is further achieved by covering and fitting one side of the inner wall of the return groove with a limiting plate. This is different from the single card slot and card block plug-in sealing and dust-proof method in the prior art, and improves the sealing and dust-proof effect of the frequency converter shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the analysis of the cover plate and the housing clamping installation structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure of the clamping assembly of the utility model;

[0015] Figure 4 It is a schematic diagram of the elastic bracket structure on the clamping assembly of the utility model;

[0016] Figure 5 It is a schematic diagram of the return groove structure on the inner side of the bayonet of the utility model;

[0017] In the figure: a cover plate 1, a shell 2, a snap-on assembly 3, a snap-on port 4, a fixing plate 5, an elastic bracket 6, a limiting plate 7, a rectangular frame 11, a clamping block 12, a heat dissipation port 13, a sealing gasket 14, and a return groove 15. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] like Figures 1 to 5 As shown:

[0020] The utility model discloses a protective housing for a frequency converter, comprising a cover plate 1 and a shell 2. The cover plate 1 and the shell 2 are installed by a snap-fit ​​assembly 3. The shell 2 is provided with a snap-fit ​​assembly 4 at a position corresponding to the snap-fit ​​assembly 3. The snap-fit ​​assembly 3 comprises a fixing plate 5, an elastic bracket 6, a limiting plate 7, a rectangular frame 11, and a clamping block 12. The fixing plates 5 are symmetrically distributed on both sides of the width direction of the cover plate 1. The length direction of the fixing plates 5 is parallel to the length direction of the cover plate 1, and the fixing plates 5 extend out of the cover plate 1. The fixing plates 5 are far away from each other. An elastic bracket 6 is symmetrically arranged on the surface of one side, and a limiting plate 7 is arranged on the end surface of the elastic bracket 6 away from the fixed plate 5. A rectangular frame 11 coaxially arranged therewith is arranged in the middle of the limiting plate 7. A clamping block 12 is arranged on the surface of the limiting plate 7 inside the rectangular frame 11. The clamping block 12 is inserted into the bayonet 4 through the abutment of the elastic bracket 6. A return groove 15 is provided on the surface of the shell 2 in the outer circumferential direction of the bayonet 4. When the clamping block 12 is inserted into the bayonet 4, the rectangular frame 11 is inserted into the return groove 15.

[0021] In the prior art, the dustproof effect is poor. With long-term use, dust is easily introduced into the connection between the bayonet and the card block, causing electrostatic damage to the inverter components inside the shell. In order to solve the problems of the prior art, the present invention adopts: a bayonet 4 is arranged at a position corresponding to the card connection component 3 on the shell 2, and a return groove 15 is opened on the surface of the shell 2 in the peripheral direction of the bayonet 4. As the cover plate 1 is sealed with the shell, the fixing plate 5 penetrates into the shell 2, and the card block 12 slides against the inside of the shell 2 through the elastic action of the elastic bracket 6. 2 is slidably inserted into the bayonet 4, and the rectangular frame 11 is inserted into the return groove 15, so that the cover plate 1 is fixedly installed with the housing by correspondingly inserting the clamping block 12 and the rectangular frame 11 into the bayonet 4 and the return groove 15. The rectangular frame 11 is plugged into the return groove 15 to further prevent the entry of dust. The inner wall of the return groove 15 is covered and fitted by the limiting plate 7, so as to further achieve the dustproof effect. This is different from the single bayonet 4 and the clamping block 12 plug-in sealing and dustproof method in the prior art, and improves the sealing and dustproof effect of the inverter housing.

[0022] At least in one embodiment, the bayonet 4 and the block 12 are arranged in one-to-one correspondence, and the number of each is set to two.

[0023] At least in one embodiment, the limiting plate 7 is arranged to cover the return groove 15 .

[0024] In at least one embodiment, a heat dissipation opening 13 is provided in the circumference of the housing 2 , and a dustproof structure is provided on the heat dissipation opening 13 .

[0025] In at least one embodiment, in order to improve the dustproof and shock-absorbing effects, a structure is adopted in which a sealing gasket 14 is provided on the circumferential surface where the cover plate 1 contacts the housing 2 .

[0026] The embodiments of the present invention are only used to illustrate the present invention and do not constitute a limitation on the scope of the claims. Other substantially equivalent alternatives that can be thought of by those skilled in the art are all within the protection scope of the present invention.

Claims

1. A protective housing for a frequency converter, characterized in that: The invention comprises a cover plate (1) and a shell (2), wherein the cover plate (1) and the shell (2) are mounted via a snap-fit ​​assembly (3), a snap-fit ​​opening (4) is provided on the shell (2) at a position corresponding to the snap-fit ​​assembly (3), the snap-fit ​​assembly (3) comprises a fixing plate (5), an elastic bracket (6), a limiting plate (7), a rectangular frame (11), and a clamping block (12), the fixing plates (5) are symmetrically distributed on both sides of the interior of the cover plate (1) along the width direction, the length direction of the fixing plates (5) is parallel to the length direction of the cover plate (1), and the fixing plates (5) are arranged to extend out of the cover plate (1), and the surfaces of the fixing plates (5) which are away from each other are symmetrically arranged An elastic bracket (6) is arranged, and a limiting plate (7) is arranged on the end surface of the elastic bracket (6) away from the fixed plate (5). A rectangular frame (11) coaxially arranged therewith is arranged in the middle of the limiting plate (7). A clamping block (12) is arranged on the surface of the limiting plate (7) inside the rectangular frame (11). The clamping block (12) is inserted into the bayonet (4) by abutting against the elastic bracket (6). A return groove (15) is provided on the surface of the shell (2) in the peripheral direction of the bayonet (4). When the clamping block (12) is inserted into the bayonet (4), the rectangular frame (11) is inserted into the return groove (15).

2. The protective housing for a frequency converter according to claim 1, characterized in that: The bayonet (4) and the clamping block (12) are arranged in one-to-one correspondence, and the number of each is set to be two.

3. The protective housing for a frequency converter according to claim 1, characterized in that: The limiting plate (7) is arranged to cover the return groove (15).

4. The protective housing for a frequency converter according to claim 1, characterized in that: A heat dissipation opening (13) is provided in the circumferential direction of the shell (2), and a dustproof structure is provided on the heat dissipation opening (13).

5. The protective housing for a frequency converter according to claim 1, characterized in that: The circumferential surface of the cover plate (1) in contact with the housing (2) is provided with a sealing gasket (14).

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