CN215933889U - Power unit and equipotential connection structure thereof - Google Patents
Power unit and equipotential connection structure thereof Download PDFInfo
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- CN215933889U CN215933889U CN202122636603.9U CN202122636603U CN215933889U CN 215933889 U CN215933889 U CN 215933889U CN 202122636603 U CN202122636603 U CN 202122636603U CN 215933889 U CN215933889 U CN 215933889U
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Abstract
The utility model relates to the technical field of frequency converters and discloses a power unit and an equipotential connection structure thereof. Wherein: the insulation base is provided with a first connecting position for mounting a first equipotential connecting piece and a slot hole for mounting a second equipotential connecting piece; the first equipotential connecting piece is provided with an inner conductor connecting potential which is used for being connected with the inner conductor of the power unit in an equipotential manner; the second equipotential connecting piece can penetrate through the through hole and the slotted hole which are formed in the power unit shell and is connected with the first equipotential connecting piece and the power unit shell in an equipotential mode. The utility model can effectively separate the equipotential connection points between the inner conductors of the power unit and the shell of the power unit and ensure the electrical safety.
Description
Technical Field
The utility model relates to the technical field of frequency converters, in particular to a power unit and an equipotential connection structure thereof.
Background
The power unit in the frequency converter system comprises a power unit shell (shell for short) and a power unit inner conductor (namely a power unit internal system). During use, the power unit shell needs to be in equipotential connection with the inner conductor of the power unit. However, when the power unit is in an idle test, the equipotential connection point between the power unit shell and the inner conductor of the power unit must be disconnected, and when the power unit is in a full test, the equipotential connection point needs to be reconnected.
At present, for convenience of operation, the power unit inner conductor is generally provided with a lead wire with a terminal, and the terminal is led out of the power unit to the outside of the shell to be equipotentially connected with the shell. The connecting terminal is disconnected to be suspended outside the shell, so that the requirement that an equipotential connecting point between the shell of the power unit and an inner conductor of the power unit needs to be disconnected during no-load test can be met; when the full load test is carried out, the wiring terminal is reconnected with the shell.
However, when no-load testing is performed, special attention of workers is required to ensure the insulation distance between the conductor with the wiring terminal and the shell, and the exposed part of the wiring terminal still has electric shock risk.
Therefore, how to ensure electrical safety while effectively separating equipotential connection points between the inner conductors of the power units and the power unit casing is a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a power unit and an equipotential connection structure thereof, which can ensure electrical safety while effectively separating an equipotential connection point between an inner conductor of the power unit and a power unit casing.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a power unit equipotential connection structure, includes insulating base, first equipotential connecting piece, second equipotential connecting piece, wherein:
the insulating base is provided with a first connecting position for mounting the first equipotential connecting piece and a slot for mounting the second equipotential connecting piece;
the first equipotential connecting piece is provided with an inner conductor connecting potential which is used for being connected with an inner conductor of the power unit in an equipotential manner;
the second equipotential connecting piece can penetrate through a through hole formed in the power unit shell and the slot hole and is connected with the first equipotential connecting piece and the power unit shell in an equipotential mode.
Optionally, in the above equipotential connecting structure for a power unit, the second equipotential connecting member is an equipotential connecting bolt;
the first equipotential connecting piece is provided with an equipotential connecting threaded hole or a through hole matched with the equipotential connecting bolt.
Optionally, in the above equipotential connecting structure for a power unit, the insulating base includes a base body and a mounting groove fixedly connected to a front side surface of the base body, where the mounting groove is the first connection potential adapted to the first equipotential connecting member.
Optionally, in the above power unit equipotential connecting structure, a side wall of the mounting groove is provided with a clamping hole, and a side surface of the first equipotential connecting piece is provided with a clamping protrusion adapted to the clamping hole.
Optionally, in the above power unit equipotential connecting structure, a lower side surface of the clamping protrusion is an inclined surface, and an inclined direction of the inclined surface is: gradually inclines upwards from the root to the top; or the lower side surface of the clamping protrusion is an arc-shaped surface.
Optionally, in the above equipotential connecting structure for a power unit, the first connection potential and the slot are respectively located at two sides of the base body.
Optionally, in the above equipotential connecting structure for a power unit, the rear side of the base body is provided with the slot and a second connection location for connecting with the power unit casing through a fastener.
Optionally, in the above equipotential connecting structure for a power unit, a groove communicated with the upper side is disposed on the rear side of the base body, and the slot is located in the groove.
Optionally, in the above equipotential connecting structure for a power unit, the first equipotential connecting part is embedded in the insulating base and integrally formed.
Optionally, in the equipotential connecting structure for a power unit, the inner conductor connecting potential is a threaded hole.
A power cell comprising a power cell housing and a power cell inner conductor, and a power cell equipotential connection structure as described hereinabove.
According to the power unit and the equipotential connection structure thereof, the equipotential connection between the inner conductor of the power unit and the shell of the power unit can be conveniently and effectively separated by using a mode of combining the insulating material (the insulating base) and the conductive material (the first equipotential connection piece and the second equipotential connection piece), the safe and reliable distance between the shell of the power unit and the electrified terminal is effectively ensured, and the equipotential connection point is placed in the power unit, so that the electrified body can be prevented from being touched by mistake, and the risk of electric shock is avoided. It is safe and reliable.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 and 2 are isometric views of an insulation base provided by an embodiment of the utility model at different angles;
FIG. 3 is an isometric view of a first equipotential connector provided in accordance with one embodiment of the present invention;
fig. 4 is an exploded schematic view of an equipotential connection structure of a power unit according to an embodiment of the present invention.
Wherein:
1-an insulating base, 2-a first equipotential connector, 3-a second equipotential connector,
4-power unit shell, 5-fastening bolt,
11-first connection site, 12-slot, 13-second connection site,
14-a clamping hole, 15-a groove,
21-inner conductor connecting position, 22-clamping protrusion and 23-equipotential connecting threaded hole.
Detailed Description
The utility model discloses a power unit and an equipotential connection structure thereof, which can effectively separate equipotential connection between an inner conductor of the power unit and a shell of the power unit and can ensure electrical safety.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example one
Referring to fig. 1 to 4, an equipotential connection structure for a power unit according to an embodiment of the present invention includes an insulating base 1, a first equipotential connector 2, and a second equipotential connector 3. Wherein:
the insulating base 1 is provided with a first connecting position 11 for installing the first equipotential connecting piece 2 and a slotted hole 12 for installing the second equipotential connecting piece 3;
the first equipotential connecting piece 2 is provided with an inner conductor connecting potential 21 for equipotential connection with an inner conductor of the power unit;
the second equipotential connector 3 can pass through a through hole provided in the power unit case 4 (typically, a conductive iron plate) and the slot 12 of the insulating base 1, and is equipotential-connected to the first equipotential connector 2 and the power unit case 4.
It is emphasized here that the insulating base 1 is an insulating material, and the first equipotential connector 2, the second equipotential connector 3, and the power cell housing 4 are all conductive materials.
In the specific implementation: the first equipotential connecting piece 2 is arranged at a first connecting potential 11 of the insulating base 1 and is equipotentially connected with an inner conductor of the power unit; the second equipotential connecting piece 3 passes through the through hole arranged on the power unit shell 4 and the slot hole 12 of the insulating base 1. After the installation is finished, the insulating base 1 is positioned between the power unit shell 4 and the first equipotential connecting piece 2 to play a role in insulating and isolating; the power unit inner conductor, the first equipotential connector 2, the second equipotential connector 3, and the power unit case 4 are connected in sequence and are connected in an equipotential manner.
When the equipotential connection between the inner conductor of the power unit and the power unit shell 4 needs to be disconnected, the second equipotential connecting piece 3 is detached, and at the moment, the first equipotential connecting piece 2 and the power unit shell 4 are separated by the insulating base 1 to form a safe distance, so that the electrical separation is effectively guaranteed, no exposed electrified part exists outside the power unit, and the safety of personnel is guaranteed.
When the equipotential connection between the inner conductor of the power unit and the power unit casing 4 needs to be established, the second equipotential connection member 3 is inserted into the through hole formed in the power unit casing 4 and the slot 12 of the insulating base 1.
Therefore, in the equipotential connection structure for a power unit provided in the first embodiment of the present invention, by using a combination of an insulating material (the insulating base 1) and a conductive material (the first equipotential connection member 2 and the second equipotential connection member 3), equipotential connection between a conductor in the power unit and the power unit housing 4 can be conveniently and effectively separated, a safe and reliable distance between the power unit housing and a charged terminal is effectively ensured, and an equipotential connection point is placed inside the power unit, so that a charged body is prevented from being touched by mistake, and a risk of electric shock is avoided. It is safe and reliable.
In a preferred embodiment, the second equipotential connecting part 3 is an equipotential connecting bolt, the first equipotential connecting part 2 is provided with an equipotential mounting hole 23 adapted to the equipotential connecting bolt, and the equipotential mounting hole 23 is a threaded hole or a through hole. When the equipotential mounting hole 23 is a threaded hole, the second equipotential connecting piece 3 sequentially passes through the through hole on the power unit shell 4 and the slot hole 12 on the insulating base 1 and then is fastened and connected with the threaded hole; when the equipotential mounting hole 23 is a through hole, the second equipotential connecting piece 3 passes through the through hole on the power unit casing 4, the slot hole 12 on the insulating base 1, and the equipotential mounting hole 23 on the first equipotential connecting piece 2 in sequence, and then is fastened by a nut. Therefore, the second equipotential connecting member 3 can establish/break equipotential connection between the power unit inner conductor and the power unit case 4, and can also perform a fastening connection function on the power unit case 4, the insulating base 1, and the first equipotential connecting member 2, thereby performing a fastening function on the entire power unit.
The equipotential connecting bolt is generally a standard steel bolt and has certain conductivity.
Specifically, the inner conductor connection site 21 is a threaded hole. As shown in fig. 3 and 4, the equipotential connection between the first equipotential bonding part 2 and the power cell inner conductor is achieved by tightening the bolts 5. For example, after the fastening bolt 5 is mounted on the first equipotential bonding wire 2, the bottom of the fastening bolt 5 contacts the power unit inner conductor to be equipotentially connected thereto; for example, the lead terminal of the inner conductor of the power unit is connected to the position of the inner conductor connection site 21 by pressing through the fastening bolt 5, so as to ensure the equipotential connection between the first equipotential connector 2 and the inner conductor of the power unit.
Specifically, referring to fig. 1 and fig. 2, the insulating base 1 includes a base body and an installation groove fixedly connected to a front side surface of the base body, where the installation groove is the first connection location 11 adapted to the first equipotential connector 2.
Further, the side wall of the mounting groove is also provided with a clamping hole 14, and the side surface of the first equipotential connecting piece 2 is provided with a clamping protrusion 22 matched with the clamping hole 14. Therefore, the first equipotential connecting piece 2 can be fixedly installed in the installation groove of the insulating base 1 through the clamping hole 14 and the clamping protrusion 22 and is not easy to fall off.
Preferably, the lower side of the clamping protrusion 22 is a slope, and the slope direction of the slope is: gradually inclines upwards from the root to the top; alternatively, the lower side surface of the catching projection 22 is an arc-shaped surface. Therefore, when the first equipotential connecting piece 2 is installed on the insulating base 1, the clamping protrusion 22 can be conveniently slid into the clamping hole 14 to be clamped with the clamping protrusion, and the assembling stability between the first equipotential connecting piece 2 and the insulating base 1 is ensured.
Specifically, the first connecting portion 11 is located at the front side of the base body, and the slot 12 is disposed at the rear side of the base body. Furthermore, the rear side of the base body is further provided with a second connection site 13 for connecting with the power unit housing 4 through a fastener. Wherein, if the fastener is a bolt, the second connecting position 13 is provided with a through hole; if the fastening member is a screw, the second connection position 13 is provided with a threaded hole.
Further, the rear side of the base body is provided with a groove 15 communicated with the upper side, and the slotted hole 12 is positioned in the groove 15.
When the second equipotential connector 3 is installed, whether the second equipotential connector 3 passes through the installation hole 41 of the power unit shell 4 and then is aligned with the slot 12 on the insulating base 1 can be conveniently checked through the groove 15, and if the second equipotential connector 3 passes through the installation hole 41 of the power unit shell 4, the relative position between the insulating base 1 and the power unit shell 4 is adjusted, so that quick installation is realized.
Specifically, two sides of the groove 15 are respectively provided with a second connection position 13 for ensuring the stable connection between the insulating base 1 and the power unit housing 4.
Example two
An embodiment of the present invention provides an equipotential connection structure for a power unit, where the equipotential connection structure differs from the equipotential connection structure for a power unit provided in the first embodiment only in that: the first equipotential connecting piece 2 is embedded into the insulating base 1 and integrally formed. That is to say, directly imbed first equipotential connecting piece 2 in insulating base 1 production process, for example, insulating base 1 is in injection moulding's in-process, puts into the first equipotential connecting piece 2 that has made the shaping to make the two form integrated into one piece's fixed connection structure.
EXAMPLE III
The third embodiment of the present invention provides a power unit, where the power unit includes a power unit housing 4 and a power unit inner conductor, and the power unit equipotential connection structure provided in the first embodiment or the second embodiment of the present invention: the connector comprises an insulating base 1, a first equipotential connector 2 and a second equipotential connector 3.
In summary, the power unit and the equipotential connection structure thereof provided by the utility model can be applied to power unit modules of medium and high voltage inverter products, and can realize rapid operation of equipotential connection and disconnection on the premise of safety and reliability. Not only improves the working efficiency, but also improves the safety.
It should be noted that the term "through hole" as used herein refers to a simple through hole having a smooth inner wall.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a power unit equipotential connection structure, characterized in that, includes insulating base (1), first equipotential connecting piece (2), second equipotential connecting piece (3), wherein:
the insulation base (1) is provided with a first connecting position (11) for installing the first equipotential connecting piece (2) and a slotted hole (12) for installing the second equipotential connecting piece (3);
the first equipotential connecting piece (2) is provided with an inner conductor connecting potential (21) which is used for being connected with an inner conductor of the power unit in an equipotential manner;
the second equipotential connecting piece (3) can penetrate through a through hole formed in the power unit shell (4) and the slotted hole (12) and is connected with the first equipotential connecting piece (2) and the power unit shell (4) in an equipotential mode.
2. The equipotential connection structure of a power cell according to claim 1, characterized in that said second equipotential connecting means (3) is an equipotential connecting bolt;
the first equipotential connecting piece (2) is provided with an equipotential connecting threaded hole (23) or a through hole matched with the equipotential connecting bolt.
3. The equipotential connection structure of a power cell according to claim 1, wherein the insulating base (1) includes a base body and a mounting groove fixedly attached to a front side of the base body, the mounting groove being the first connection site (11) adapted to the first equipotential connection member (2).
4. The equipotential connection structure of a power unit according to claim 3, wherein a clamping hole (14) is formed in a side wall of the mounting groove, and a clamping protrusion (22) adapted to the clamping hole (14) is formed on a side surface of the first equipotential connecting member (2).
5. The equipotential connection structure of a power cell according to claim 3, wherein the first connection site (11) and the slot (12) are located on either side of the base body.
6. The equipotential connection structure of a power cell according to claim 5, characterized in that the rear side of the base body is provided with said slot (12) and a second connection site (13) for connection with the power cell casing (4) by means of fasteners.
7. The equipotential connection structure of a power cell according to claim 6, wherein the rear side of the base body has a groove (15) communicating with the upper side, and the slot (12) is located in the groove (15).
8. The equipotential connection structure of a power cell according to claim 1, wherein said first equipotential connecting means (2) is embedded in said insulating base (1) and is formed integrally therewith.
9. The equipotential connection structure of a power cell according to claim 1, characterized in that said inner conductor connection site (21) is a threaded hole.
10. A power cell, characterized by comprising a power cell housing (4) and a power cell inner conductor, and a power cell equipotential connection structure of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122636603.9U CN215933889U (en) | 2021-10-29 | 2021-10-29 | Power unit and equipotential connection structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122636603.9U CN215933889U (en) | 2021-10-29 | 2021-10-29 | Power unit and equipotential connection structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN215933889U true CN215933889U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122636603.9U Active CN215933889U (en) | 2021-10-29 | 2021-10-29 | Power unit and equipotential connection structure thereof |
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| CN (1) | CN215933889U (en) |
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- 2021-10-29 CN CN202122636603.9U patent/CN215933889U/en active Active
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