CN215989552U

CN215989552U - Adapter, device and system for wire harness test

Info

Publication number: CN215989552U
Application number: CN202122169129.3U
Authority: CN
Inventors: 董志永; 刘爱军
Original assignee: Siemens Rail Transit Equipment Tianjin Co ltd
Current assignee: Siemens Rail Transit Equipment Tianjin Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-03-08
Anticipated expiration: 2031-09-08

Abstract

The utility model relates to the technical field of wiring harness (4) testing, in particular to an adapter (1), a device and a system for testing a wiring harness (4). On the base (11), a first connection base (14) is electrically connected with a plurality of first sockets (12), a second connection base (15) is electrically connected with a plurality of second sockets (13), and when one first socket (12) is plugged with a first plug (411) of one cable (41), one second socket (13) is suitable for being plugged with a second plug (412) of the same cable (41). Therefore, the test of the wire harness (4) is more convenient and quicker, and the time and material cost are saved.

Description

Adapter, device and system for wire harness test

Technical Field

The utility model relates to the technical field of wire harness testing, in particular to an adapter, a device and a system for wire harness testing.

Background

The shaped wire bundles used in high-speed rail converters and auxiliary inverters include a large number of control cables and signal feedback cables. In the prior art, a newly manufactured, replaced or maintained molded wire harness is tested after being installed in a product, for example, electric devices in a traction cabinet body are connected through the molded wire harness, after the whole traction product is assembled, a point-to-point test is performed on cables in the molded wire harness in a pre-test area of the traction cabinet body by using a universal meter, and then a voltage-withstanding insulation test of the molded wire harness is performed in a voltage-withstanding test area of the traction cabinet body.

However, in the above method of mounting the molded wire harness into a product and then performing a test, if a cable inside the molded wire harness is damaged, the cable needs to be repaired or replaced, which is difficult and requires a lot of time and material costs.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an adapter, an apparatus and a system for testing a wire harness, so as to reduce the difficulty, time and material cost in the process of testing the wire harness.

In a first aspect, in an embodiment of the adapter for testing a wire harness provided by the present invention, there are a plurality of cables in the wire harness to be tested, and one end of the cable is provided with a first plug and the other end is provided with a second plug; the adapter is adapted to be connected with a cable tester through a first connecting wire and a second connecting wire, the adapter comprising: a base; a plurality of first receptacles disposed on the base such that the first receptacles are adapted to mate with the first plugs; at least one first wire holder on said base arranged such that said first wire holder is electrically connected to a plurality of first sockets and said first wire holder is arranged to be adapted for mating with a first electrical connector of said first connection wire; a plurality of second receptacles disposed on the base such that when a first receptacle is mated with a first plug of a cable, a second receptacle is adapted to mate with a second plug of the same cable; at least one second wire holder is provided on the base such that the second wire holder is electrically connected to a plurality of second sockets and the second wire holder is provided adapted for mating with the second electrical connectors of the second connecting wire.

Therefore, on the base, the first wire holder is electrically connected with a plurality of first sockets, the second wire holder is electrically connected with a plurality of second sockets, and when one first socket is plugged with the first plug of one cable, one second socket is suitable for being plugged with the second plug of the same cable. So, the cable tester is connected with the first connection terminal of adapter through an at least first connecting wire in the test procedure to and be connected with the second connection terminal through an at least second connecting wire, can carry out performance test such as continuity, withstand voltage and insulation of shaping cable, make the test of pencil more convenient, swift and save time and material resources cost. The purpose of directly testing the newly manufactured, replaced or maintained molded wiring harness can be achieved.

In an implementation manner of the adapter provided in the above embodiment, one of the two opposite ends of the first wire holder is provided with a first hooking portion, and the other end of the first wire holder is provided with a first clamping portion; first hook portion be suitable for with the cooperation is connect with in the second hook portion collude of first electricity, just first joint portion sets to be suitable for when first hook portion with the cooperation is connected with in the second hook portion collude with the second joint portion joint of first electricity. Therefore, when the first electric connector and the first wire holder are in splicing matching, the first electric connector is further hooked with one end of the first wire holder and clamped with the other end of the first wire holder, and the problem that the first electric connector is accidentally separated from the first wire holder due to the fact that the first electric connector is connected with the first electric connector by the first electric connector and the first connecting wire is connected with the first electric connector by the first electric connector is solved.

In one embodiment of the adapter provided in the above embodiment, the plurality of second sockets are disposed around the plurality of first sockets on the base, the plurality of first sockets are used for connecting a plurality of first plugs of the bus end of the wire harness, and the plurality of second sockets are used for correspondingly connecting a plurality of second plugs of each branch end of the wire harness. Therefore, the design can meet the test requirements of the wire harness applied in the scene that the bus end of the wire harness is connected with the control terminal and each branch end of the wire harness is respectively connected with each device.

In an implementation manner of the adapter provided in the foregoing embodiment, the adapter further includes: and the wire hanging frames comprise a plurality of wire hanging rods or wire hanging hooks which extend outwards from the base, and the periphery of the base is sequentially distributed. Therefore, the wiring harness main body can be erected along the wire hanging frame, and each cable can be extended out at a proper position of the wire hanging frame and connected to the first socket or the second socket. Through setting up the hanging wire frame, can make placing of pencil and cable cleaner and tidier in the pencil testing process, guarantee to insert the accuracy of establishing the position, and more do benefit to the connection of pencil and the work of demolising of the back pencil that the test finishes. Meanwhile, the arrangement of the wire hanging frame is simpler and the cost is lower.

In an implementation manner of the adapter provided in the foregoing embodiment, the adapter further includes: the wiring groove extends along the periphery of the base, one side of the wiring groove is provided with an opening, and the direction of the opening of the wiring groove, which is positioned on one side of the base, is the same as the extension direction of the side of the base; and a plurality of threading holes corresponding to the positions of the second sockets are also arranged on the wiring groove at intervals. Therefore, the wire harness main body can be overlapped inside the wire trough through the opening of the wire trough, and each cable of the wire harness can extend out of the wire through hole and is connected with the first socket or the second socket. Through setting up the trough, can make placing of pencil and cable cleaner and tidier in the pencil test process, guarantee to insert the accuracy of establishing the position, and more do benefit to the connection of pencil and the work of demolising of the back pencil that the test finishes. Simultaneously, the trough has better advantage of accomodating pencil and its cable.

In one implementation of the adapter provided in the above embodiment, the adapter further comprises a cart to which the base is fixed; or wheels are arranged on the base. Therefore, the adapter is convenient to move, and the test work of the wire harnesses in different places can be met.

In an implementation of the adapter provided in the above embodiment, the first socket and/or the second socket is an aircraft socket. Therefore, since the aviation socket is mostly connected to the cable on the high-speed rail and the motor car, in order to meet the test of the cable for the high-speed rail and the motor car, the first socket and the second socket in the adapter can be set as the aviation socket.

In a second aspect, in one embodiment of the wire harness testing device provided by the present invention, the wire harness testing device includes: an adapter as described in any of the above embodiments; and a cable tester adapted to be connected with the first wire holder of the adapter by at least one first connection wire, and further adapted to be connected with the second wire holder by at least one second connection wire. Therefore, the wire harness testing device has the advantages that the wire harness is tested more conveniently and quickly and the time and material cost are saved due to the adoption of the adapter in the embodiment.

In an implementation manner of the wire harness testing device provided in the above embodiment, the wire harness testing device further includes: the adapter and the cable tester are fixed on the rack. From this, it is fixed with adapter and cable tester through the frame, can be with its combination structure as an organic whole, be convenient for wholly sell, use and export.

In a third aspect, in one embodiment of the wire harness testing system provided by the present invention, the wire harness testing system comprises: the wire harness testing device described in any of the above embodiments; and the infrared grating transmitter and the infrared grating receiver are in communication connection with the cable tester and are set to enable the cable tester to cut off a test power supply when an object is detected to intrude into a preset test area in a beam test state. Therefore, the wire harness testing system can prevent casualties and equipment loss caused by accidents in the process of carrying out high-voltage testing on the wire harness by arranging the infrared grating transmitter and the infrared grating receiver. In addition, an alarm can be given by a cable tester or other alarm device.

Drawings

The foregoing and other features and advantages of the utility model will become more apparent to those skilled in the art to which the utility model relates upon consideration of the following detailed description of a preferred embodiment of the utility model with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of an adapter for harness testing according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the connection of an adapter to a harness and cable tester in accordance with an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a wiring harness testing system according to an embodiment of the present invention.

Wherein the reference numbers are as follows:

1-adapter 11-base 12-first socket

13-second socket 14-first wire holder 15-second wire holder

16-wire hanging frame 17-wheel 2-cable tester

21-first connecting line 22-second connecting line 31-echelette emitter

32-echelette receiver 4-wire harness 41-cable

411-first plug 412-second plug 51-partition wall

52-warning tape

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples.

The shaped wire bundles used in high-speed rail converters and auxiliary inverters include a large number of control cables and signal feedback cables. In the prior art, a newly manufactured, replaced or maintained molded wire harness is tested after being installed in a product, for example, electric devices in a traction cabinet body are connected through the molded wire harness, after the whole traction product is assembled, a point-to-point test is performed on cables in the molded wire harness in a pre-test area of the traction cabinet body by using a universal meter, and then a voltage-withstanding insulation test of the molded wire harness is performed in a voltage-withstanding test area of the traction cabinet body. These tests mainly include: continuity, pressure resistance, insulation, and presence or absence of breakage of the cable.

The embodiment provides an adapter 1, a device and a system for testing a wire harness 4, which are used for reducing the difficulty, time and material cost in the process of testing the wire harness 4.

In a first aspect, as shown in fig. 1 and fig. 2, in an embodiment of the adapter 1 for testing the wire harness 4, the wire harness 4 to be tested has a plurality of wires 41, and one end of each wire 41 is provided with a first plug 411 and the other end is provided with a second plug 412, it should be noted that although the first plugs 411 of the plurality of wires 41 are shown as one block in fig. 2, it is only for convenience that the first plugs 411 of all the wires are not the same, and a general wire has independent first plugs 411 and second plugs 412. Fig. 2 is also not intended to illustrate the corresponding number relationship between the first socket 12 and the first wire holder 14, nor the corresponding number relationship between the second socket 13 and the second wire holder 15, but merely to show that there is a connection relationship in the circuit. Furthermore, the adapter 1 is adapted to be connected to the cable tester 2 by a first connection cord 21 and a second connection cord 22.

The adapter 1 comprises: a base 11; a plurality of first sockets 12 provided on the base 11 such that the first sockets 12 are adapted to be mated with the first header 411; at least one first wire holder 14 provided on the base 11 such that the first wire holder 14 is electrically connected with the plurality of first sockets 12, and the first wire holder 14 is provided adapted to be in plugging fit with the first electrical terminals of the first connection wires 21; a plurality of second receptacles 13 arranged on the base 11 such that, while one first receptacle 12 is plugged into the first plug 411 of one cable 41, one second receptacle 13 is adapted to be plugged into the second plug 412 of the same cable 41; at least one second wire holder 15 is provided on the base 11 such that the second wire holder 15 is electrically connected to the plurality of second sockets 13, and the second wire holder 15 is provided adapted to mate with the second electrical connectors of the second connection cord 22.

Thus, on the base 11, the first wire holder 14 is electrically connected with a plurality of first sockets 12, the second wire holder 15 is electrically connected with a plurality of second sockets 13, and when one first socket 12 is plugged with the first plug 411 of one cable 41, one second socket 13 is adapted to be plugged with the second plug 412 of the same cable 41. So, in the test process, the cable tester 2 is connected with the first wire holder 14 of the adapter 1 through at least one first connecting wire 21 and is connected with the second wire holder 15 through at least one second connecting wire 22, so that the continuity, voltage resistance, insulation and other performance tests of the formed cable 41 can be performed, and the test of the wire harness 4 is more convenient and quicker and saves time and material cost. The number of the first connection lines 21 and the second connection lines 22 can be selected according to specific test requirements, and of course, all the first wire holders 14 can be connected to the cable tester 2 through the plurality of first connection lines 21, and all the second wire holders 15 can be connected to the cable tester 2 through the plurality of second connection lines 22, and the current of part of the first connection lines 21 is conducted as required in the test of the wire harness 4.

It should be noted that, since the cable 41 on the high-speed rail and the motor car is mostly connected to the aviation socket, in order to satisfy the test of the cable 41 for the high-speed rail and the motor car, the first socket 12 and the second socket 13 in the adapter 1 may be provided as aviation sockets. Thus, in one embodiment of the adapter 1 provided in the above embodiment, the first receptacle 12 and/or the second receptacle 13 are aircraft receptacles. Meanwhile, the aviation socket has the design of fast plugging and wrong plugging prevention.

It is understood that the first and

second sockets

12 and 13 may be provided on the front surface of the base 11 and the first and

second wire holders

14 and 15 may be provided on the rear surface of the base 11. In addition, the first socket 12, the second socket 13, the first wire holder 14, and the second wire holder 15 may be all disposed on the same side of the base 11.

The first electrical terminals, which are mated with the first wire holder 14, run the risk of coming off due to the large volume and weight of the first electrical terminals themselves and the weight of the first connecting wires 21 connected thereto. To this end, in one implementation of the adapter 1 provided in the above embodiment, one of the opposite ends of the first wire holder 14 is provided with a first hooking portion and the other end is provided with a first snapping portion; first hook portion is suitable for with the cooperation of the second hook portion colluding of first electricity joint, and first joint portion sets to be suitable for when first hook portion with the cooperation of second hook portion colluding with the second joint portion joint of first electricity joint. Therefore, when the first electric connector is matched with the first wire holder 14 in an inserting mode, the first electric connector is hooked with one end of the first electric connector 14 and clamped with the other end of the first electric connector, and the problem that the first electric connector is accidentally separated from the first wire holder 14 due to the larger weight of the first electric connector and the first connecting wire 21 connected with the first electric connector is solved.

For example, the purpose of mutual hooking and matching between the first wire holder 14 and the first electrical connector can be achieved by one of the first hook portion and the second hook portion being a hook and the other being a hook. In addition, the purpose of mutual clamping between the first wire holder 14 and the first electric connector can be realized by one of the first clamping part and the second clamping part being a clamping jaw and the other being a clamping opening. Although the description is given here in conjunction with the function of preventing disconnection between the first wire holder 14 and the first electrical connector, the same function of preventing disconnection between the second wire holder 15 of the adapter 1 and the second electrical connector can be achieved by applying this design.

For the formed wire harness 4 applied on the high-speed rail, the first plugs 411 of the plurality of cables 41 are located at the same end of the wire harness 4 and connected to the control terminal, and then the second plugs 412 of the plurality of cables 41 are respectively connected with the devices at different positions on the high-speed rail. To this end, in one embodiment of the adapter 1 provided in the above embodiment, the plurality of second sockets 13 are provided around the plurality of first sockets 12 on the base 11, the plurality of first sockets 12 are used to connect the plurality of first plugs 411 of the bus terminals of the wire harness 4, and the plurality of second sockets 13 are used to correspondingly connect the plurality of second plugs 412 of the respective branch terminals of the wire harness 4. Therefore, the design can meet the test requirements of the wire harness 4 applied in the scene that the control terminal is connected to the bus end of the wire harness 4 and each branch end of the wire harness 4 is respectively connected to each device. As in fig. 2, the first receptacle 12 is arranged in the second upper region and the second receptacle 13 is arranged in the remaining region. In other embodiments of the adapter 1 provided in the above embodiments, the first receptacle 12 and the second receptacle 13 may also be positioned according to specific requirements.

Due to the variety and number of the cables 41 in the wire harness 4, it is generally necessary to clearly mark each cable 41 and the plugging position thereof during connection so as to ensure the accuracy of the plugging position. To this end, in an implementation of the adapter 1 provided in the above embodiment, the adapter 1 further comprises: and a plurality of wire hanging brackets 16, which comprise a plurality of wire hanging rods or wire hanging hooks extending outwards away from the base 11 and are distributed on the periphery of the base 11 in sequence. The wire hanging bracket 16 shown in fig. 1 is a simply provided wire hanging rod. From this, the pencil 4 main part can be set up along the hanging wire frame 16, and each cable 41 can stretch out and be connected to first socket 12 or second socket 13 in the position of suitable hanging wire frame 16, through setting up hanging wire frame 16, can make placing of pencil 4 and cable 41 neater in the pencil 4 testing process, guarantees to insert the accuracy of establishing the position, and more does benefit to the connection of pencil 4 and the work of demolising of pencil 4 after the test finishes. Meanwhile, the arrangement of the wire hanging frame 16 is simpler and the cost is lower.

Further, in addition to providing the wire hanging bracket 16, in an embodiment of the adapter 1 provided in the above embodiment, the adapter 1 further includes: a wiring groove extending along the periphery of the base 11, wherein one side of the wiring groove is provided with an opening, and the direction of the opening of the wiring groove positioned on one side of the base 11 is the same as the extending direction of the side of the base 11; the wiring groove is also provided with a plurality of wiring holes at intervals corresponding to the positions of the second sockets 13. Therefore, the main body of the wire harness 4 can be overlapped in the wire trough through the opening of the wire trough, and each cable 41 of the wire harness 4 can extend out through the wire through hole and is connected with the first socket 12 or the second socket 13. Through setting up the trough, can make placing of pencil 4 and cable 41 neater in the testing process, guarantee to insert the accuracy of establishing the position, and more do benefit to the connection of pencil 4 and the work of demolising of pencil 4 after the test finishes. Meanwhile, the cabling channel has the advantage of better accommodating the wiring harness 4 and the cable 41 thereof.

In view of the fact that the adapter 1 may involve handling during use, in one embodiment of the adapter 1 provided in the above embodiment, the adapter 1 further comprises a cart to which the base 11 is fixed; alternatively, as shown in fig. 1, wheels 17 may be provided on the base 11. Thereby, the movement of the adapter 1 itself is facilitated, and the test work of the wire harness 4 at different places can be satisfied.

In a second aspect, considering the integrity of the testing device of the wiring harness 4, facilitating the sale, use, transportation, export, etc. of the whole set of devices for testing the wiring harness 4, a wiring harness testing device is further provided in an embodiment of the present invention, referring to fig. 2, the wiring harness testing device includes: the adapter 1 in any of the above embodiments; and a cable tester 2 adapted to be connected to the first wire holder 14 of the adapter 1 by at least one first connection wire 21 and further adapted to be connected to the second wire holder 15 by at least one second connection wire 22. Therefore, the wire harness testing device has the advantages that the wire harness 4 can be tested more conveniently and quickly, and the time and material cost are saved due to the adoption of the adapter 1 in the embodiment. The purpose of directly testing the newly manufactured, replaced or repaired molded wire harness 4 can be achieved.

In an implementation manner of the wire harness testing device provided in the above embodiment, the wire harness testing device further includes: the rack, the adapter 1 and the cable tester 2 are all fixed on it. From this, fix adapter 1 and cable tester 2 through the frame, can be with its structure of combination as whole, be convenient for wholly sell, use, transportation and export.

In the third aspect, since the cable 41 is tested with a high voltage test item, there is a certain risk. To this end, in an embodiment of the present invention, a wire harness testing system is further provided, referring to fig. 3, the wire harness testing system includes: the wire harness testing device in any one of the above embodiments; and an echelette transmitter 31 and an echelette receiver 32 communicatively connected to the cable tester 2 and configured to cause the cable tester 2 to cut off test power when an object intruding into a preset test area is detected in a test state of the wire harness 4. Therefore, the wire harness testing system can prevent casualties and equipment loss caused by accidents in the process of carrying out high-voltage testing on the wire harness 4 by arranging the infrared grating transmitter 31 and the infrared grating receiver 32. In addition, an alarm can be given by a cable tester or other alarm device.

In fig. 3, the adapter 1 and the cable tester 2 are in a test area having three sides of a partition wall 51, one side of which is an access opening where the ir grating transmitter 31 and the ir grating receiver 32 can be installed. Meanwhile, a warning band 52 may be provided at the doorway to warn people. When a person mistakenly breaks the test area of the wire harness 4, the grating can automatically cut off the voltage output of the high-voltage cable tester 2, so that the safety of the wire harness test area in testing the formed wire harness 4 is ensured.

It should be noted that the above-mentioned echelette emitter 31 and echelette receiver 32 are based on echelette technology, echelette is also called electronic grating, echelette fence or echelette rail, is one of active infrared correlation, and adopts multi-beam infrared correlation, the emitter emits infrared light to the receiver in a mode of "low frequency emission and time division detection", and once a person or an object blocks any two adjacent beams of light emitted by the emitter for more than 30ms, the receiver immediately outputs an alarm signal.

The utility model relates to the technical field of wiring harness 4 testing, in particular to an adapter 1, a device and a system for wiring harness 4 testing. On the base 11, a plurality of first sockets 12 are electrically connected to the first wire holder 14, a plurality of second sockets 13 are electrically connected to the second wire holder 15, and one second socket 13 is adapted to be plugged with the second plug 412 of the same cable 41 while one first socket 12 is plugged with the first plug 411 of the same cable 41. Therefore, the test of the wire harness 4 is more convenient and quicker, and the time and material cost are saved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An adapter (1) for testing a wire harness (4), wherein the wire harness (4) to be tested is provided with a plurality of cables (41), one end of each cable (41) is provided with a first plug (411), and the other end of each cable is provided with a second plug (412); the adapter (1) is adapted to be connected to a cable tester (2) by a first connection line (21) and a second connection line (22), characterized in that the adapter (1) comprises:

a base (11);

a plurality of first sockets (12) arranged on the base (11) such that the first sockets (12) are adapted to mate with the first plug (411);

at least one first wire holder (14) on said base (11) arranged such that said first wire holder (14) is electrically connected to a plurality of first sockets (12), and said first wire holder (14) is arranged to be adapted to mate with a first electrical connector of said first connection wire (21);

a plurality of second sockets (13) arranged on said base (11) such that, while a first socket (12) is plugged into the first plug (411) of a cable (41), a second socket (13) is adapted to be plugged into the second plug (412) of the same cable (41);

at least one second wire holder (15) on said base (11) arranged such that said second wire holder (15) is electrically connected to a plurality of second sockets (13), and the second wire holder (15) is arranged to be adapted to mate with second electrical connections of said second connection wire (22).

2. The adapter (1) according to claim 1, characterized in that: one end of the two opposite ends of the first wire holder (14) is provided with a first hook part, and the other end of the first wire holder is provided with a first clamping part; first hook portion be suitable for with the cooperation is connect with in the second hook portion collude of first electricity, just first joint portion sets to be suitable for when first hook portion with the cooperation is connected with in the second hook portion collude with the second joint portion joint of first electricity.

3. The adapter (1) according to claim 1, characterized in that: the plurality of second sockets (13) are provided around the plurality of first sockets (12) on the base (11), the plurality of first sockets (12) are used for connecting a plurality of first plugs (411) of the bus end of the wire harness (4), and the plurality of second sockets (13) are used for correspondingly connecting a plurality of second plugs (412) of each branch end of the wire harness (4).

4. An adapter (1) according to claim 3, characterized in that it further comprises:

the wire hanging frames (16) comprise a plurality of wire hanging rods or wire hanging hooks extending outwards from the base (11), and are sequentially distributed on the periphery of the base (11).

5. An adapter (1) according to claim 3, characterized in that: further comprising:

the wiring groove extends along the periphery of the base (11), one side of the wiring groove is provided with an opening, and the direction of the opening of the wiring groove, which is positioned on one side of the base (11), is the same as the extension direction of the side of the base (11);

the wiring groove is also provided with a plurality of wiring holes at intervals corresponding to the positions of the second sockets (13).

6. The adapter (1) according to claim 1, characterized in that:

the device also comprises a vehicle, wherein the base (11) is fixed on the vehicle; alternatively, the first and second electrodes may be,

wheels (17) are arranged on the base (11).

7. The adapter (1) according to claim 1, characterized in that: the first socket (12) and/or the second socket (13) are aeronautical sockets.

8. A wire harness testing device, comprising:

the adapter (1) of any one of claims 1 to 7; and the number of the first and second groups,

a cable tester (2) adapted to be connected to the first wire holder (14) of the adapter (1) by at least one first connection wire (21) and further adapted to be connected to the second wire holder (15) by at least one second connection wire (22).

9. The wire harness testing device according to claim 8, further comprising:

the adapter (1) and the cable tester (2) are fixed on the rack.

10. A wire harness testing system, comprising:

the wire harness testing device of claim 8 or 9; and the infrared grating transmitter (31) and the infrared grating receiver (32) are in communication connection with the cable tester (2) and are arranged to enable the cable tester (2) to cut off a test power supply when an object is detected to intrude into a preset test area under the test state of the wiring harness (4).