CN220731817U - Frequency converter grounding structure - Google Patents

Abstract

The utility model discloses a frequency converter grounding structure, which comprises a frequency converter body, wherein a frequency conversion circuit board is vertically unfolded and fixed in the frequency converter body along the transverse direction, and a ground wire connection seat is arranged at the bottom of the front surface of the frequency conversion circuit board; the ground wire connection seat is vertically inserted and provided with a grounding assembly. The beneficial effects are that: according to the utility model, after the ground wire connection seat is arranged on the frequency conversion circuit board, the ground plug and the ground wire connection seat can be electrically connected together in a detachable manner through the vertical sliding fit of the ground plug and the mounting slot of the ground wire connection seat and the horizontal sliding fit of the limiting rod and the limiting hole, the fixed combination mode of the ground plug and the ground wire connection seat is simple and easy to operate, the ground plug and the ground wire can be conveniently and quickly connected with the ground wire connection seat for grounding use, and meanwhile, the compression fixing mode of adding screws is replaced, so that the condition of damaging wire heads is avoided.

Description

Frequency converter grounding structure

Technical Field

The utility model relates to the field of auxiliary components of frequency converters, in particular to a grounding structure of a frequency converter.

Background

The frequency converter is a power control device which controls the alternating current motor by changing the frequency of a working power supply of the motor by applying a frequency conversion technology and a microelectronic technology. The frequency converter mainly comprises rectification, filtering, inversion, a braking unit, a driving unit, a detecting unit and a microprocessing unit, and in order to ensure the safety of power electronic equipment, various protection circuits are usually added at the input end of a main loop to ensure the safety, and the protection circuits are required to be grounded, otherwise, the power electronic equipment is possibly damaged due to static electricity, but when the grounding treatment is carried out on a circuit board in the frequency converter, a wire holder is usually fixed on the circuit board, then the upper end of a grounding wire is pressed in a wire pressing groove of the wire holder in a mode of adding screws to the wire holder, the wire head at the upper end of the grounding wire can be pressed in the mode, the wire head position is easy to break and separate in the long-time use process, and the wire head is easy to break in the wire pressing groove of the wire holder when being replaced in the later stage, so that the wire head is not easy to clean, and the smooth replacement of the grounding wire is inconvenient.

Disclosure of Invention

The utility model aims to provide a grounding structure of a frequency converter, which is characterized in that after a grounding wire holder is arranged on a frequency conversion circuit board, the grounding plug and the grounding wire can be electrically connected with the grounding wire holder in a detachable way through vertical sliding fit of the grounding plug and an installation slot of the grounding wire holder and transverse sliding fit of a limiting rod and a limiting hole, and the fixing combination mode of the grounding plug and the grounding wire holder is simple and easy to operate, and is explained in detail below.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a frequency converter grounding structure, which comprises a frequency converter body, wherein a frequency conversion circuit board is vertically unfolded and fixed in the frequency converter body along the transverse direction, and a ground wire connection seat is arranged at the bottom of the front surface of the frequency conversion circuit board;

the ground wire connection seat is vertically inserted and provided with a grounding assembly, a locking assembly is arranged at the side part of the ground wire connection seat, and the top of the grounding assembly is detachably connected with the ground wire connection seat through the locking assembly.

Preferably, a wire passing groove for enabling the grounding assembly to smoothly pass through to the outside is formed in the lower portion of the frequency converter body.

Preferably, the upper and lower positions of the back of the ground wire connection seat are respectively fixedly provided with a connecting plate in an extending mode, and the connecting plates are respectively fixed in front of the frequency conversion circuit board in a mode of additionally installing a plurality of connecting pieces.

Preferably, the grounding assembly comprises a mounting slot and a grounding plug block, the mounting slot is vertically formed in the top surface of the ground wire connection seat, the mounting slot is a through slot in the vertical direction, the grounding plug block penetrates through the mounting slot in a vertical sliding fit mode, the grounding plug block is detachably fixed in the mounting slot through the locking assembly, the bottom surface of the grounding plug block is connected with a grounding wire through a mounting plate, and the lower end of the grounding wire extends out of the lower portion of the frequency converter body through the wire passing slot.

Preferably, the horizontal cross-sectional shapes of the mounting slot and the ground plug are rectangular.

Preferably, a fixing piece used for being fixed on the ground is arranged at the bottom end of the grounding wire.

Preferably, the ground wire connection base, the ground plug block and the mounting plate are all conductive metal blocks, the back surface of the ground wire connection base is in contact with the position of a ground welding point of the frequency conversion circuit board, and the side end surface of the ground plug block, which is far away from the locking assembly, is in contact with the inner side wall of the mounting slot.

Preferably, the locking assembly comprises a mounting hole and a limiting rod, the mounting hole is transversely formed in one side end face of the ground wire connection seat, the grounding plug is close to the side end face of the mounting hole, the limiting hole is transversely formed in the side end face of the mounting hole, the limiting hole is transversely and coaxially compared with the mounting hole, the mounting hole is transversely and slidably matched with the limiting rod, the inner end of the limiting rod is transversely and coaxially matched with the limiting hole in a sliding mode, the outer end of the limiting rod extends out of the outer end face of the ground wire connection seat and is coaxially fixed with a handle, a spring is coaxially and clearance-matched with the part, located between the handle and the outer end face of the ground wire connection seat, of the limiting rod, and two ends of the spring are respectively fixedly connected with the handle and the outer end face of the ground wire connection seat.

Preferably, the spring is in a pre-stretching state, the limiting hole is a blind groove, and the inner end of the limiting rod is in fit contact with the inner end of the limiting hole.

With the adoption of the grounding structure of the frequency converter, particularly in the using process of the frequency converter body, after the ground wire connection seat is arranged on the frequency conversion circuit board, the grounding plug and the ground wire connection seat can be electrically connected together in a detachable manner by means of vertical sliding fit of the grounding plug and the mounting slot of the ground wire connection seat and horizontal sliding fit of the limiting rod and the limiting hole, and the grounding plug and the mounting slot are in contact with each other in a specific fit manner, because the spring is in a pre-stretching state and the inner end of the limiting rod is in contact with the limiting hole in a contact manner, the limiting rod can be propped against the limiting hole through the elastic force of the spring during pre-stretching, and then the grounding plug is propped against the inner wall of the mounting slot in contact with each other in a contact manner, so that the grounding plug and the ground wire connection seat are well contacted and can be smoothly conducted, the fixed combination mode of the grounding plug block, the grounding wire and the ground wire connection seat is simple and easy to operate, the grounding plug block and the grounding wire are convenient to be connected with the ground wire connection seat quickly and then are grounded, meanwhile, the compressing and fixing mode of adding screws is replaced, the situation of damaging wire heads is avoided, meanwhile, the length of the grounding wire can enable the fixing piece to contact the ground, the lower end of the grounding wire is reliably fixed on the ground in a mode of adding bolts to the ground through the fixing piece, so that good grounding of the frequency conversion circuit board is realized, the grounding plug block and the grounding wire can be detached from the ground wire connection seat vertically only by holding the handle to pull the limiting rod out of the limiting hole, the grounding plug block is vertically pulled out of the mounting slot, the ground connection plug and the ground connection wire are easy to operate in a split mode, the ground connection plug and the ground connection wire holder are convenient to overhaul and replace the ground connection wire smoothly after being detached, and the power supply of the frequency conversion circuit board is completely cut off before the ground connection plug is detached, so that safe operation is ensured.

The beneficial effects are that: 1. according to the utility model, after the ground wire connection seat is arranged on the frequency conversion circuit board, the ground plug and the ground wire connection seat can be electrically connected together in a detachable manner through the vertical sliding fit of the ground plug and the mounting slot of the ground wire connection seat and the horizontal sliding fit of the limiting rod and the limiting hole, and the fixed combination mode of the ground plug and the ground wire connection seat is simple and easy to operate, so that the ground plug and the ground wire can be conveniently and quickly connected with the ground wire connection seat for grounding use, and meanwhile, the compression fixing mode of adding screws is replaced, and the condition of damaging wire heads is avoided;

2. the ground connection plug and the ground wire can be detached from the ground wire wiring seat by vertically pulling the ground connection plug out of the mounting slot only after the outer pull limiting rod is pulled out of the limiting hole, the ground connection plug and the ground wire are detached from the ground wire wiring seat in a simple and easy-to-operate manner, and the ground connection plug and the ground wire can be detached at a later stage conveniently and smoothly overhauled and replaced.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of the overall axis of the present utility model;

FIG. 2 is a second overall isometric view of the present utility model;

FIG. 3 is a schematic cross-sectional view of FIG. 1 in accordance with the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3A in accordance with the present utility model;

FIG. 5 is a second schematic cross-sectional view of FIG. 1 in accordance with the present utility model;

FIG. 6 is an enlarged view of a portion of the utility model at B of FIG. 5;

FIG. 7 is a front exterior view of FIG. 1 of the present utility model;

FIG. 8 is a left side exterior view of FIG. 1 of the present utility model;

FIG. 9 is a right side exterior view of FIG. 1 of the present utility model;

fig. 10 is a bottom exterior view of fig. 1 of the present utility model.

The reference numerals are explained as follows:

1. a transducer body; 101. a frequency conversion circuit board; 102. wire passing grooves; 2. a ground wire connection seat; 201. a connecting plate; 202. a connecting piece; 3. a grounding assembly; 301. installing a slot; 302. a grounding plug; 303. a mounting plate; 304. a ground wire; 305. a fixing piece; 4. a locking assembly; 401. a mounting hole; 402. a handle; 403. a spring; 404. a limiting hole; 405. and a limit rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

Referring to fig. 1-10, the utility model provides a grounding structure of a frequency converter, which comprises a frequency converter body 1, wherein a frequency conversion circuit board 101 is vertically unfolded and fixed in the frequency converter body 1 along the transverse direction, and a ground wire connection seat 2 is arranged at the bottom of the front surface of the frequency conversion circuit board 101. The ground wire connection seat 2 is vertically inserted and provided with the grounding component 3, specifically, the grounding component 3 comprises a mounting slot 301 and a ground wire connection block 302, the mounting slot 301 is vertically arranged on the top surface of the ground wire connection seat 2, the mounting slot 301 is a through slot in the vertical direction, the ground wire connection block 302 penetrates through the mounting slot 301 in a vertical sliding fit mode, the ground wire connection block 302 is detachably fixed in the mounting slot 301 through the locking component 4, the bottom surface of the ground wire connection block 302 is connected with the ground wire 304 through the mounting plate 303, the lower end of the ground wire 304 extends out of the lower portion of the frequency converter body 1 through the wire slot 102, and the arrangement is convenient for realizing the electric connection between the ground wire 304 and the frequency conversion circuit board 101 in a mode that the ground wire connection block 302 at the top end of the ground wire connection block 304 is connected with the ground wire connection seat 2, and then realizing the ground conduction through the ground wire 304.

The side position installation of ground connection terminal 2 is provided with locking component 4, and locking component 4 is passed through at the top of ground connection component 3 and ground connection terminal 2 is dismantled to be connected, specifically, locking component 4 includes mounting hole 401 and gag lever post 405, mounting hole 401 has been seted up along transversely to the side terminal surface of ground connection terminal 2, the side terminal surface that ground connection plug 302 is close to mounting hole 401 has transversely been seted up spacing hole 404, and spacing hole 404 is transversely coaxial contrast with mounting hole 401, mounting hole 401 has gag lever post 405 along transversely sliding fit, and the inner and spacing hole 404 transversely coaxial sliding fit of gag lever post 405, the outer end of gag lever post 405 stretches out the outside terminal surface of ground connection terminal 2 and coaxial fixed with handle 402, the partial coaxial clearance fit of gag lever post 405 between handle 402 and the outside terminal surface of ground connection terminal 2 has spring 403, and the outside terminal surface fixed connection of handle 402 and ground connection terminal 2 respectively, so set up, be convenient for through the vertical sliding fit of ground connection plug 302 and ground connection plug 301 and the vertical sliding fit of gag lever post 405 and spacing hole 404, can be with ground connection plug 304 and ground connection plug 302 and ground connection terminal 2 and ground connection plug 304 can be dismantled and only be removed from the ground connection plug 302 and ground connection terminal 2 simultaneously from the outside terminal connection terminal 2.

As the scheme of the present preferred scheme, the lower part of converter body 1 has been seted up and has been used for making grounding subassembly 3 wear out to external wire casing 102 smoothly, so set up, be convenient for make the earth connection 304 wear out converter body 1 through wire casing 102 smoothly through the mode that sets up wire casing 102, the upper and lower position at earth connection wiring seat 2 back all extends and is fixed with connecting plate 201, and connecting plate 201 all is fixed in the front of frequency conversion circuit board 101 through the mode of installing a plurality of connecting pieces 202 additional, preferably connecting plate 201 and connecting piece 202 are electrically conductive metalwork, so set up, be convenient for install the reliable stable bottom in the front of frequency conversion circuit board 101 with earth connection wiring seat 2 through the mode of installing connecting piece 202 additional through connecting plate 201.

Meanwhile, the horizontal section shapes of the installation slot 301 and the grounding plug 302 are rectangular, so that the installation slot 301 and the grounding plug 302 are convenient to vertically slide and match, a fixing piece 305 used for being fixed on the ground is arranged at the bottom end of the grounding wire 304, the bottom end of the grounding wire 304 can be stably and reliably fixed on the ground through the fixing piece 305, the grounding wire holder 2, the grounding plug 302 and the installation plate 303 are all conductive metal blocks, the back surface of the grounding wire holder 2 is in contact with the grounding welding spot of the frequency conversion circuit board 101, the side end surface of the grounding plug 302, far away from the locking component 4, is in contact with the inner side wall of the installation slot 301, and the installation slot is convenient for the grounding wire holder 2, the grounding plug 302 and the grounding wire 304 to form a conductive path.

And the spring 403 is in a pre-stretching state, the limiting hole 404 is a blind groove, and the inner end of the limiting rod 405 is in contact with the inner end of the limiting hole 404, so that the limiting rod 405 can be conveniently propped against the limiting hole 404 by the elastic force of the spring 403 during pre-stretching, and then the grounding plug 302 is propped against the inner wall of the mounting slot 301 to be in contact with the inner wall of the mounting slot 301, so that the grounding plug 302 is ensured to be in good contact with the ground wire connection seat 2, and smooth conduction can be realized.

With the above structure, in particular, in the process of using the frequency converter body 1, after the ground wire holder 2 is installed on the frequency conversion circuit board 101, the ground plug 302 and the installation slot 301 of the ground wire holder 2 can be electrically connected together in a detachable manner by vertically sliding fit and transversely sliding fit between the ground plug 302 and the ground wire 304 and the ground wire holder 2 in a manner of the limit rod 405 and the limit hole 404, when the ground plug 302 is specifically matched with the installation slot 301, because the spring 403 is in a pre-stretching state and the inner end of the limit rod 405 is in contact with the limit hole 404, the limit rod 405 can be propped against the limit hole 404 by the elastic force of the spring 403 when the spring 403 is pre-stretching, and then the ground plug 302 is propped against the inner wall of the installation slot 301, thereby ensuring that the ground plug 302 is in contact with the ground wire holder 2 well, so that the ground plug 302 and the ground wire holder 2 can be smoothly conductive, the fixed combination manner of the ground plug 302 and the ground plug 304 and the ground wire holder 2 is easy to operate, the ground plug 302 and the ground wire 304 are convenient to be quickly and fixedly connected with the ground wire holder 2, and simultaneously, the ground plug 302 and the ground plug 304 can be easily detached from the ground wire holder 2 by the fixing piece 304, simultaneously, the length of the ground plug can be prevented from being simultaneously from being fixed to the ground wire holder 2 by the fixing screw, and the ground plug 302 can be simultaneously released from the limit rod 405 by the fixing screw, and the ground wire holder 2 by the fixing bolt, and the ground plug can be simultaneously, and the ground wire holder can be simultaneously removed from the ground wire holder by the fixing bolt, and the ground plug can be simultaneously by the fixing bolt, and the ground wire connector 2, the ground wire 304 is easily overhauled and replaced after the ground plug 302 and the ground wire 304 are detached at a later stage, and it should be noted that the power supply of the frequency conversion circuit board 101 should be completely cut off before the ground plug 302 is detached to ensure safe operation.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (9)

1. The utility model provides a converter grounding structure, includes converter body (1), its characterized in that: a frequency conversion circuit board (101) is vertically unfolded and fixed in the frequency converter body (1) along the transverse direction, and a ground wire wiring seat (2) is arranged at the bottom of the front surface of the frequency conversion circuit board (101);

the ground wire connection seat (2) is vertically inserted and provided with the grounding assembly (3), a locking assembly (4) is arranged at the side part of the ground wire connection seat (2), and the top of the grounding assembly (3) is detachably connected with the ground wire connection seat (2) through the locking assembly (4).

2. The frequency converter grounding structure of claim 1, wherein: the lower part of the frequency converter body (1) is provided with a wire passing groove (102) used for enabling the grounding assembly (3) to smoothly penetrate out to the outside.

3. The frequency converter grounding structure of claim 2, wherein: the upper and lower positions of the back of the ground wire connection seat (2) are respectively fixedly provided with a connecting plate (201) in an extending mode, and the connecting plates (201) are respectively fixed in front of the frequency conversion circuit board (101) in a mode of additionally installing a plurality of connecting pieces (202).

4. A frequency converter grounding structure according to claim 2 or 3, characterized in that: the grounding assembly (3) comprises a mounting slot (301) and a grounding plug block (302), the mounting slot (301) is vertically formed in the top surface of the ground wire connection seat (2), the mounting slot (301) is a through slot vertically, the grounding plug block (302) penetrates through the mounting slot (301) in a vertically sliding fit mode, the grounding plug block (302) is detachably fixed to the mounting slot (301) through the locking assembly (4), a grounding wire (304) is connected to the bottom surface of the grounding plug block (302) through a mounting plate (303), and the lower end of the grounding wire (304) extends out of the lower portion of the frequency converter body (1) through the wire passing slot (102).

5. The frequency converter grounding structure of claim 4, wherein: the horizontal cross-sectional shapes of the mounting slot (301) and the grounding plug (302) are rectangular.

6. The frequency converter grounding structure of claim 5, wherein: the bottom end of the grounding wire (304) is provided with a fixing piece (305) which is used for being fixed on the ground.

7. The frequency converter grounding structure of claim 6, wherein: the ground wire wiring seat (2), the ground plug block (302) and the mounting plate (303) are all conductive metal blocks, the back of the ground wire wiring seat (2) is in fit contact with the position of a ground welding point of the frequency conversion circuit board (101), and the side end face, away from the locking assembly (4), of the ground plug block (302) is in fit contact with the inner side wall of the mounting slot (301).

8. The frequency converter grounding structure of claim 5, 6 or 7, wherein: the locking assembly (4) comprises a mounting hole (401) and a limiting rod (405), wherein the mounting hole (401) is transversely formed in one side end face of the ground wire wiring seat (2), the grounding plug (302) is close to the side end face of the mounting hole (401), the limiting hole (404) is transversely formed in a matched mode along the transverse direction, the limiting rod (405) is transversely matched with the mounting hole (401) in a sliding mode, the inner end of the limiting rod (405) is transversely matched with the limiting hole (404) in a sliding mode in a coaxial mode, the outer end of the limiting rod (405) extends out of the outer end face of the ground wire wiring seat (2) and is coaxially fixed with a handle (402), the limiting rod (405) is located in a spring (403) in partial coaxial clearance fit with the space between the outer end faces of the handle (402) and the outer end face of the ground wire wiring seat (2), and two ends of the spring (403) are fixedly connected with the outer end faces of the handle (402) and the ground wire wiring seat (2) respectively.

9. The frequency converter grounding structure of claim 8, wherein: the spring (403) is in a pre-stretching state, the limiting hole (404) is a blind groove, and the inner end of the limiting rod (405) is in fit contact with the inner end of the limiting hole (404).