CN219142965U - High-voltage wire harness shielding effectiveness testing device - Google Patents
High-voltage wire harness shielding effectiveness testing device Download PDFInfo
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- CN219142965U CN219142965U CN202320000498.6U CN202320000498U CN219142965U CN 219142965 U CN219142965 U CN 219142965U CN 202320000498 U CN202320000498 U CN 202320000498U CN 219142965 U CN219142965 U CN 219142965U
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Abstract
The utility model discloses a high-voltage wire harness shielding effectiveness testing device, which can be used for rapidly and accurately measuring the surface transfer impedance of a high-voltage wire harness so as to judge whether the shielding effectiveness is good or not. The test device comprises a test sleeve, a lead, a test head, a shielding layer protecting shell, a shielding layer clamping sleeve and a shielding layer locking ring; one end of the test sleeve is connected with the lead head, the other end of the test sleeve is connected with the test head, the shielding layer protection shell is suspended in the test sleeve, the shielding layer protection shell is connected with the test head, the test head is connected with the test instrument, and the shielding layer clamping sleeve is connected to the inner wall of the shielding layer protection shell through the shielding layer locking ring; the shielding layer locking ring, the shielding layer clamping sleeve, the shielding layer protecting shell and the testing head are conductive, the testing wire harness is clamped in the shielding layer clamping sleeve, and the clamped wire harness part exposes the shielding layer. The utility model has simple structure and operation and good adaptability, and can be used for adapting high-voltage wire bundles with different diameters to carry out shielding effectiveness test.
Description
Technical Field
The utility model belongs to the technical field of electromagnetic interference detection, and particularly relates to a high-voltage wire harness electromagnetic shielding effectiveness testing device.
Background
The high-voltage wire harness plays a role in transmitting electric energy in the new energy electric automobile, and is a large artery for connecting three large electric power (battery, electric control and motor) of the whole automobile. The driving motor, the motor controller and the DCDC in the new energy electric automobile comprise a large number of electronic components, the oscillation generated in a circuit is larger when the automobile runs, the vibration becomes one of main electromagnetic interference (EMI) sources in an electric system of the electric automobile, the high-voltage systems of the electric automobile are connected by high-voltage wire bundles to realize electric energy transmission, the high requirement on the shielding efficiency of the high-voltage wire bundles is provided, the improper control can seriously interfere the whole automobile electricity, and as shown in fig. 1, the shielding efficiency of the wire bundles is poor in the frequency range of 150kHz-30MHz, and larger electromagnetic interference is generated.
Therefore, the shielding effectiveness of the high-voltage wire harness is a basic guarantee of the whole safety of the new energy automobile, how to check the shielding effectiveness of the high-voltage wire harness of the electric automobile and the importance thereof, and the technical development of the high-voltage wire harness has an important effect on the improvement of the whole performance of the new energy automobile.
Disclosure of Invention
The utility model aims to provide a high-voltage wire harness shielding effectiveness testing device, which can be used for rapidly and accurately measuring the surface transfer impedance of a high-voltage wire harness, and the lower the transfer impedance is, the stronger the shielding effectiveness is, so that the shielding effectiveness can be judged.
The technical scheme adopted by the utility model is as follows:
a high-voltage wire harness shielding effectiveness testing device comprises a testing sleeve, a lead head, a testing head, a shielding layer protecting shell, a shielding layer clamping sleeve and a shielding layer locking ring;
the test sleeve is of a hollow tubular structure, one end of the test sleeve is connected with the lead head, the other end of the test sleeve is connected with the test head, and a shielding layer protection shell is suspended in the sleeve;
one end of the shielding layer protection shell is connected with a test head, and the test head is connected with a test instrument; the shielding layer clamping sleeve is connected to the inner wall of the shielding layer protective shell through a shielding layer locking ring;
the shielding layer locking ring, the shielding layer clamping sleeve, the shielding layer protecting shell and the testing head are conductive, and the testing sleeve and the lead head are not conductive;
the lead head passes through the test wire harness, the test wire harness is clamped in the shielding layer clamping sleeve, and the clamped wire harness part exposes the shielding layer.
Further: the lead head comprises a test tube end cap, a test tube end connecting seat, a test tube end blocking cover and a test tube end locking ring; the test tube end cap is screwed outside the test sleeve, and the test tube end connecting seat is pressed at the end part of the test sleeve; the test pipe end blocking cover is arranged inside the test pipe end connecting seat, and the test pipe end locking ring is screwed between the test pipe end connecting seat and the test pipe end blocking cover to clamp the test pipe end blocking cover; and a small hole is formed in the middle of the test tube end blocking cover, and a test wire harness penetrates through the small hole.
Further: the test head comprises a test head connecting end, a wiring terminal, a test head insulating block and a test head shell, wherein one end of the test head connecting end is connected with the shielding layer protective shell, and the other end of the test head connecting end is connected with the wiring terminal; the test head insulating block is connected to the outer end of the test head connecting end and insulates the test head connecting end from the test head shell; the test head shell is connected with the test sleeve; the terminal penetrates through the test head insulating block and the test head shell.
Further: an insulated test head pressing ring is pressed between the test head shell and the test head insulating block.
Further: and the periphery of the test head shell and the periphery of the test sleeve are provided with a pipe clamp, and the pipe clamp is locked by a locking mechanism.
Further: the shielding layer clamping sleeve is a clamp formed by buckling two elastic semi-wedge structures together, and a test wire harness is clamped in the center of the clamp.
Further: the device is characterized in that a wire harness switching clamp is further independently configured, a wire harness connector is clamped on the wire harness switching clamp, one end of the wire harness connector is connected with a test wire harness, a wiring terminal is arranged at the other end of the wire harness connector, and the wiring terminal is connected to a test instrument.
Therefore, the beneficial effects of the utility model are as follows:
first, the utility model has simple structure and operation, ensures the convenience and the rapidness of the establishment of the test environment, saves time and labor, and is accurate and efficient.
Secondly, the suitability is good, and the high-voltage wire bundles with different diameters can be adapted to carry out shielding effectiveness test.
Third, the manufacturing cost is low, far lower than the price of foreign imported equipment, and the safety is high and the reliability is strong.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated herein and constitute a part of this specification, illustrate only some embodiments and, together with the description, serve to explain the principles of the utility model. In the drawings:
FIG. 1 is a graph showing the strength of electromagnetic interference generated by poor shielding effectiveness of high voltage wire bundles at frequencies between 150kHz and 30 MHz;
FIG. 2 is a front elevational view of the body structure of the present utility model;
FIG. 3 is a cross-sectional view of the body structure of the present utility model;
fig. 4 is a schematic view of an auxiliary harness transit jig of the present utility model.
In the figure, 1-test cannula; 2-a lead; 3-a test head; 4-shielding layer protective housing; 5-clamping the shielding layer; 6-shielding layer locking ring; 7-testing the wire harness; 8-supporting a base; 9-a wire harness switching fixture;
21-test tube end cap; 22-a test tube end connecting seat; 23-testing the end cap of the pipe; 24-testing the pipe end locking ring;
31-a test head connection; 32-connecting terminals; 33-test head insulating blocks; 34-a test head housing; 35-a test head clamping ring; 36-pipe clamp; 37-locking mechanism;
91-a wire harness joint; 92-connection terminals.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the technical solution of the utility model to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.
As shown in fig. 2 and 3, a high-voltage wire harness shielding effectiveness testing device mainly comprises a testing sleeve 1, a lead head 2, a testing head 3, a shielding layer protecting shell 4, a shielding layer clamping sleeve 5 and a shielding layer locking ring 6.
The test sleeve 1 is of a hollow tubular structure, one end of the test sleeve is provided with a lead head 2, the other end of the test sleeve is provided with a test head 3, and a shielding layer protective shell 4, a shielding layer clamping sleeve 5 and a shielding layer locking ring 6 are placed in the test sleeve. The test wire harness 7 penetrates into the test sleeve 1 along the lead 2, penetrates into the shielding layer protective shell 4 through the built-in shielding layer clamping sleeve 5 and the shielding layer locking ring 6 to stop, the shielding layer clamping sleeve 5 and the shielding layer locking ring 6 are in contact with the shielding layer protective shell 4 to conduct electricity, the shielding layer protective shell 4 is connected with the test head 3 to conduct electricity, and an electric signal passing through the test wire harness 7 can be rolled and output by the test head 3.
The lead head 2 comprises a test tube end cap 21, a test tube end connecting seat 22, a test tube end blocking cover 23 and a test tube end locking ring 24, which are all of circular tube structures. The test tube end connecting seat 22 is arranged at the end part of the test tube, the test tube end cap 21 is screwed on the outer end part of the test tube, and the test tube end connecting seat 22 is pressed on the end part of the test tube; the test tube end blanking cover 23 is arranged inside the test tube end connecting seat 22, and the test tube end locking ring 24 is screwed between the inner wall of the test tube end connecting seat 22 and the test tube end blanking cover 23 to clamp the test tube end blanking cover 23; a small hole is arranged in the middle of the test tube end blocking cover 23, the test wire harness 7 passes through the small hole, and the test wire harness 7 with different diameters can be adapted by changing the inner diameter of the small hole.
The test head 3 includes a test head connection end 31, a connection terminal 32, a test head insulating block 33, and a test head housing 34. The shielding layer protection shell 4 is connected with the test head connecting end 31, and the test head connecting end 31 is connected with the wiring terminal 32; the test head insulation block 33 is connected to the outer end of the test head connection end 31 to isolate the test head connection end 31 from the outside; the test head shell 34 is buckled at the outer end of the test head insulating block 33 and is connected with the test sleeve 1; the terminal block 32 passes through the test head insulating block 33 and the test head housing 34. Further, a test head pressing ring 35 is provided to be pressed between the test head housing 34 and the test head insulating block 33. Further, a tube clamp 36 may be provided between the test head housing 34 and the test sleeve 1, the tube clamp 36 being of two-half construction, one end being pivotally connected and the other end having a locking mechanism 37.
The shielding layer protection shell 4 is arranged in the test sleeve 1 and is connected in suspension by the test head connecting end 31 of the test head 3; the shielding layer protecting shell 4 is of a hollow tubular structure, and the shielding layer clamping sleeve 5 is arranged in the shielding layer protecting shell 4 and is contacted with the inner wall of the shielding layer protecting shell 4; the shielding layer clamping sleeve 5 is externally sleeved with a shielding layer locking ring 6, and is connected with the internal thread of the shielding layer protective shell 4 through the external thread of the shielding layer locking ring 6. The test harness 7 is threaded into the shielding clamping sleeve 5.
Further, the shielding layer clamping sleeve 5 is a clamp formed by buckling two elastic semi-wedge structures together, the wire inlet end of the shielding layer clamping sleeve 5 is an elastic wedge-shaped opening, a wire harness can be clamped, and the other end of the clamping sleeve is sleeved with the shielding layer locking ring 6 and connected to the shielding layer protection shell 4. By adjusting the different inner diameter dimensions of the shielding clamping sleeve 5, it is possible to adapt to test harnesses 7 of different diameters.
The test sleeve 1 and the lead head 2 have no conductivity, and the shielding layer locking ring 6, the shielding layer clamping sleeve 5 and the shielding layer protecting shell 4 and the test head 3 have conductivity, so that the conductive shielding test of the test harness 7 can be realized by means of the connection relation of the shielding layer protecting shell 4, the shielding layer clamping sleeve 5 and the shielding layer locking ring 6 and the connection relation of the shielding layer protecting shell 4 and the test head 3. Selecting a test wire harness with the length of about 1m, peeling off a part of the outer skin at one end of the wire harness to expose the shielding layer of the wire harness, clamping the exposed position of the shielding layer of the test wire harness 7 by using a shielding layer clamping sleeve 5, plugging the shielding layer clamping sleeve 5 into a shielding layer protecting shell 4, stably fixing the shielding layer clamping sleeve 5 into the shielding layer protecting shell 4 by using a shielding layer locking ring 6, and stopping one end of the wire harness in the shielding layer protecting shell 4; then, the shielding layer protecting shell 4 is arranged on the test head connecting end 31, and the test wire harness 7 is connected with the shielding layer clamping sleeve 5, the shielding layer locking ring 6 and the shielding layer protecting shell 4, so that the connection of the shielding layer of the wire harness and the test head connecting end 31 is equivalent to the direct connection of the wire harness and the test head connecting end 31 and the wiring terminal 32; then, the test sleeve 1 is lapped with the test head shell 34, and the wiring terminal 32 is connected with the current input end of the test instrument; the other end of the wire harness is provided with a sheath penetrating out of the lead head 2, is connected with the current output end of the testing instrument through a wiring terminal, and can measure the shielding data of the testing wire harness 7 by sending an electric signal through the instrument.
Further, the bottom of the test sleeve 1 may be provided with a support base 8 of wood material as a support.
Further, the device can be further provided with a wire harness switching fixture 9, the wire harness switching fixture 9 is of an independent structure and is arranged on one side of the test sleeve 1, from which the test wire harness 7 is led out, as shown in fig. 4, a wire harness connector 91 is clamped on the wire harness switching fixture 9, one end of the wire harness connector 91 is connected with the test wire harness 7, the other end of the wire harness connector 91 is provided with a connecting terminal 92, and the connecting terminal 92 is connected with a current injection end of the signal generator. The wire harness transferring clamp 9 can enable the test wire harness to be firmly connected with the test instrument.
During operation, one end of the test wire harness 7 is kept intact and electrically connected with the current output end of the test instrument through the wiring terminal 92, the other end of the test wire harness 7 is peeled off to expose the shielding layer, the exposed part is clamped in the shielding layer clamping sleeve 5 and is sent into the shielding layer protecting shell 4, the test head 3 is kept well connected with the shielding layer protecting shell 4, the wiring terminal 32 of the test head 3 is electrically connected with the current input end of the test instrument, therefore, the test system of the wire harness is built, the input and output current changes because one end of the test wire harness 7 is intact and the other end of the test wire harness is exposed to the shielding layer, and the shielding effectiveness test can be carried out according to the surface transfer impedance of the wire harness.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the utility model in any way, and any simple modification, equivalent changes and modification made by those skilled in the art without departing from the scope of the present utility model will still fall within the scope of the present utility model.
Claims (7)
1. The utility model provides a high-voltage wire harness shielding effectiveness testing arrangement which characterized in that: the device comprises a test sleeve (1), a lead head (2), a test head (3), a shielding layer protection shell (4), a shielding layer clamping sleeve (5) and a shielding layer locking ring (6);
the test sleeve (1) is of a hollow tubular structure, one end of the test sleeve is connected with the lead head (2), the other end of the test sleeve is connected with the test head (3), and a shielding layer protection shell (4) is suspended in the sleeve;
one end of the shielding layer protection shell (4) is connected with the test head (3), and the test head (3) is connected with the test instrument; the shielding layer clamping sleeve (5) is connected to the inner wall of the shielding layer protection shell (4) through the shielding layer locking ring (6);
the shielding layer locking ring (6), the shielding layer clamping sleeve (5), the shielding layer protection shell (4) and the test head (3) are conductive; the test sleeve (1) and the lead head (2) are not conductive;
the lead head (2) is internally provided with a test wire harness (7), the test wire harness (7) is clamped in the shielding layer clamping sleeve (5), and the clamped wire harness part exposes the shielding layer.
2. The high voltage harness shielding effectiveness testing apparatus of claim 1 wherein:
the lead head (2) comprises a test tube end cap (21), a test tube end connecting seat (22), a test tube end blocking cover (23) and a test tube end locking ring (24),
the test tube end cap (21) is screwed outside the test sleeve (1), and the test tube end connecting seat (22) is pressed at the end part of the test sleeve (1);
the test pipe end blocking cover (23) is arranged inside the test pipe end connecting seat (22), and the test pipe end locking ring (24) is screwed between the test pipe end connecting seat (22) and the test pipe end blocking cover (23) to clamp the test pipe end blocking cover (23);
a small hole is formed in the middle of the test tube end blocking cover (23), and the test wire harness (7) penetrates through the small hole.
3. The high voltage harness shielding effectiveness testing apparatus of claim 1 wherein:
the test head (3) comprises a test head connecting end (31), a wiring terminal (32), a test head insulating block (33) and a test head shell (34), wherein,
one end of the test head connecting end (31) is connected with the shielding layer protecting shell (4), and the other end of the test head connecting end is connected with the wiring terminal (32);
the test head insulation block (33) is connected to the outer end of the test head connection end (31) to insulate the test head connection end (31) from the test head shell (34);
the test head shell (34) is connected with the test sleeve (1);
the connection terminal (32) passes through the test head insulating block (33) and the test head shell (34).
4. The high voltage harness shielding effectiveness testing apparatus of claim 3 wherein:
an insulated test head clamping ring (35) is pressed between the test head housing (34) and the test head insulating block (33).
5. The high voltage harness shielding effectiveness testing apparatus of claim 3 wherein:
a pipe clamp (36) is arranged at the periphery of the test head shell (34) and the test sleeve (1), and the pipe clamp (36) is locked by a locking mechanism (37).
6. The high voltage harness shielding effectiveness testing apparatus of claim 1 wherein:
the shielding layer clamping sleeve (5) is a clamp formed by buckling two elastic semi-wedge structures together, and a test wire harness (7) is clamped in the center of the clamp.
7. The high voltage harness shielding effectiveness testing apparatus of claim 1 wherein: the device is characterized in that a wire harness switching clamp (9) is further independently configured, a wire harness connector (91) is clamped on the wire harness switching clamp (9), one end of the wire harness connector (91) is connected with a test wire harness (7), a wiring terminal (92) is arranged at the other end of the wire harness connector, and the wiring terminal (92) is connected to a test instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320000498.6U CN219142965U (en) | 2023-01-02 | 2023-01-02 | High-voltage wire harness shielding effectiveness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320000498.6U CN219142965U (en) | 2023-01-02 | 2023-01-02 | High-voltage wire harness shielding effectiveness testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219142965U true CN219142965U (en) | 2023-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320000498.6U Active CN219142965U (en) | 2023-01-02 | 2023-01-02 | High-voltage wire harness shielding effectiveness testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219142965U (en) |
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2023
- 2023-01-02 CN CN202320000498.6U patent/CN219142965U/en active Active
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