Low-voltage automobile wire harness conduction testing device and method

Abstract

The invention belongs to the technical field of automobile wire harness detection, and particularly relates to a low-voltage automobile wire harness conduction testing device and method.The low-voltage automobile wire harness conduction testing device comprises a bottom plate, a rotatable driving rod is installed at the top of the bottom plate, a rotating disc is installed at the top of the driving rod, and four discharging parts are arranged on the surface of the rotating disc in a circumferential array mode; the discharging part is used for installing a wire harness; the driving part drives the turntable to rotate, so that the discharging part sequentially passes through the detection part, and continuous automatic detection of the wire harness is realized. In the detection process, for the wiring harness with qualified conductivity, the electromagnet adsorbs the iron block and drives the supporting spring to push the qualified wiring harness to the storage area; and for the non-conducted wire harness, the extrusion block extrudes the limiting block, so that the support spring pushes the defective product to the defective product storage area. By means of the automatic detection and classification mode, the time and energy of manual operation are greatly reduced, a large number of wire harnesses can be processed in a short time, and the overall working efficiency of wire harness detection is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile wiring harness detection, and in particular to a low-voltage automobile wiring harness continuity test device and method. Background Art

[0002] In the automotive manufacturing industry, low-voltage automotive wiring harnesses, as a crucial component of the vehicle's electrical system, carry the critical task of transmitting power and signals. Their quality and performance are directly related to the overall safety, reliability, and stability of the vehicle. With the rapid development of the automotive industry, the demands on production efficiency and product quality for automotive wiring harnesses are becoming increasingly stringent. Wiring harness continuity testing is a crucial step in ensuring wiring harness quality, enabling timely detection of faults such as breaks and shorts, preventing substandard wiring harnesses from entering the market. Traditional low-voltage wiring harness continuity testing methods are mostly manual, requiring inspectors to connect and test each wiring harness individually, a tedious and time-consuming process. On large-scale production lines, this manual testing method cannot meet the demands of efficient production, resulting in extended production cycles and increased production costs. Furthermore, manual testing is susceptible to the influence of inspectors' skill level and fatigue, making it difficult to ensure the accuracy and consistency of test results. This can lead to missed or false detections, further impacting wiring harness quality and production efficiency. During traditional testing processes, dust and impurities easily accumulate on wiring harness connectors. This contamination can affect the contact between the connector and the testing equipment, leading to inaccurate test results. For example, dust can cause contact resistance between the plug and the test terminal, misidentifying a wiring harness break; or it can mask an actual break, allowing a substandard harness to pass inspection. Furthermore, due to a lack of effective classification management, qualified wiring harnesses can easily be confused with defective ones. During subsequent production and use, defective products can cause malfunctions in the vehicle's electrical system, seriously impacting vehicle safety and reliability. Some existing wiring harness continuity testers lack structural design, leading to wear and loosening of transmission components, which can cause problems such as jamming and vibration during operation. For example, some devices utilize simple mechanical transmission. Over time, wear of components such as gears and chains can lead to inaccurate transmission, compromising the stability and reliability of the test. Furthermore, these devices lack effective reset mechanisms. If an abnormality occurs during testing, such as a stuck transmission component, the device struggles to automatically restore to its original state, requiring manual intervention and repair. This not only increases maintenance costs but also disrupts normal production line operations. Summary of the Invention

[0003] In order to solve the above problems, the present invention proposes a low-voltage automobile wiring harness continuity test device to more accurately solve the problems raised in the above background technology.

[0004] The present invention is achieved through the following technical solutions:

[0005] The present invention proposes a low-voltage automotive wiring harness continuity test device, comprising a base plate, a rotatable driving rod installed on the top of the base plate, a turntable installed on the top of the driving rod, and four sets of discharge parts arranged in a circumferential array on the surface of the turntable. The discharge parts are used to install the wiring harness. A detection part is provided on the left side of the turntable. The detection part is installed on the top of the base plate and is used to test the conductivity of the wiring harness fixed thereto when the discharge part rotates to this position. The discharge part includes a mounting seat installed on the surface of the turntable, and the bottom of the mounting seat is detachably connected to a plug by screws. The head is used to insert the two ends of the wiring harness, and the surface of the plug is equipped with power terminals. The detection part includes a mounting bracket installed above the bottom plate, and a power supply is installed on the side of the mounting bracket. The power supply is connected to two power terminals with wires, and the power terminals are used to contact the power terminals when the discharge part moves to the detection part, so as to conduct the plug. An electromagnet is installed on the back of the mounting bracket, and an iron block is provided on the top of the mounting seat, which can be used to energize the electromagnet to adsorb the iron block when the wiring harness conductivity is qualified, so as to detect the wiring harness conductivity.

[0006] Preferably, the surface of the bottom plate is provided below the detection part, and the discharge part also includes a top plate attached to the surface of the plug and passing through the mounting seat, a support spring is installed between the inner wall of the top plate and the mounting seat, a connecting plate 1 is installed on the top of the top plate, and a fixing plate is installed on one side of the connecting plate 1, and the iron block is installed at the bottom of the fixing plate, and is used to drive the support spring to move downward when the iron block is adsorbed by the electromagnet, and is used for the support spring to push the wiring harness conducted at the plug to stop and store it.

[0007] Preferably, the top of the turntable is provided with, the surface of the base plate is installed at the rear, and the and are connected, and a limiting block is installed on the other side of the mounting seat located at the detection part, which is used to squeeze and limit the limiting block when it moves to the bottom, and is used to fix the plate to drive the support spring to move downward, and is used to push the non-conductive wiring harness installed at the plug into the memory for storage.

[0008] Preferably, a driving part is installed on the top of the base plate, and the driving part is used to drive the rotation of the driving rod. The driving part includes a stepper motor installed on the top of the base plate, and chucks are installed on the surface of the driving rod and the output end of the stepper motor. A chain is installed between the chucks to drive the rotation of the driving rod after the stepper motor is started.

[0009] Preferably, a cleaning portion is installed on the top of the bottom plate, and the cleaning portion is used to spray air to the bottom of the rightmost plug for cleaning the plug.

[0010] Preferably, the cleaning part includes a piston cylinder installed on the top of the base plate, a piston rod is inserted into the surface of the piston cylinder, the piston rod is used to squeeze out the air in the piston cylinder, an air duct is installed at the bottom of the piston cylinder, the air duct is used to transport the air squeezed out of the piston cylinder, and a nozzle is installed at the end of the air duct, and the nozzle is set at the bottom of the plug to spray air onto the plug for cleaning the plug.

[0011] Preferably, a transmission part is installed on the top of the base plate, and the transmission part is used to drive the movement of the piston rod. The transmission part includes a gear installed on the surface of the driving rod and rotates with the driving rod. A rack is provided on one side of the gear, and the gear drives the movement of the rack when it rotates. A connecting plate three is installed on the end of the rack, and a connecting plate two is installed on the end of the piston rod. The connecting plate three is connected to the connecting plate two.

[0012] Preferably, a notch is provided at the gear, and a reset portion is provided at the top of the bottom plate, and the reset portion is used to reset the rack when the rack contacts the notch.

[0013] Preferably, the reset part includes a mounting plate installed on the top of the base plate, a sliding rod is installed between the mounting plates, a slider is slidably connected to the surface of the sliding rod, the top of the slider is connected to the connecting plate at three points, a reset spring is installed between the slider and the mounting plate, and the reset spring is used to reset the slider.

[0014] A low-voltage automotive wiring harness continuity test method comprises the following steps:

[0015] The operator inserts both ends of the low-voltage automotive wiring harness to be tested into the plugs of the discharge section.

[0016] The stepper motor of the driving part is started, and the driving rod is driven to rotate through the chuck and chain, thereby rotating the turntable and moving the unloading part with the wire harness to the detection part.

[0017] When the discharge part moves to the detection part, the power terminal of the detection part contacts the power terminal of the discharge part, and the power supply supplies power to the plug to perform a harness conductivity test.

[0018] If the wiring harness is qualified, the electromagnet is energized to attract the iron block, which drives the fixed plate, connecting plate 1 and ejector plate to move downward. The support spring is compressed, and the ejector plate pushes the conductive wiring harness to the surface of the bottom plate and is stored in the memory below the detection part.

[0019] Compared with the prior art, the present invention provides a low-voltage automotive wiring harness continuity test device, which has the following beneficial effects:

[0020] This low-voltage automotive wiring harness continuity testing device and method uses a drive unit to rotate a turntable, allowing the unloading section to sequentially pass through the inspection section, achieving continuous and automatic testing of the wiring harness. During the testing process, for wiring harnesses that pass the continuity test, an electromagnet attracts an iron block, driving a support spring to push the qualified wiring harness to a storage area. For wiring harnesses that do not pass the continuity test, an extrusion block squeezes a limit block, causing the support spring to push defective wiring harnesses to the defective storage area. This automated testing and classification method significantly reduces manual operation time and effort, enabling the processing of large numbers of wiring harnesses in a short period of time, significantly improving the overall efficiency of wiring harness testing.

[0021] This low-voltage automotive wiring harness continuity test device and method uses a transmission unit to convert the rotation of a drive rod into linear movement of a piston rod. This allows air within the piston cylinder to be sprayed through an air duct and an air nozzle to the bottom of the rightmost plug, cleaning the plug. In actual operation, this cleaning mechanism generates an airflow of sufficient intensity to effectively remove dust and impurities from the bottom of the plug. After cleaning, the plug surface is clean, free of noticeable dust residue, ensuring a stable connection between the plug and the wiring harness.

[0022] This low-voltage automotive wiring harness continuity test device and method utilizes a rack-and-pinion transmission mechanism to stably convert the rotation of the drive rod into linear movement of the piston rod, ensuring the proper functioning of the cleaning unit. A reset mechanism is also included. When the rack contacts the notch in the gear, a reset spring provides sufficient elastic force to quickly reset the slider, ensuring the rack returns to its initial position and ensuring the proper functioning of the entire transmission structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a low-voltage automotive wiring harness continuity test device proposed by the present invention;

[0024] Figure 2 This is the left side diagram of the structure of a low-voltage automotive wiring harness continuity test device proposed by the present invention;

[0025] Figure 3 The right side diagram is a structural diagram of a low-voltage automotive wiring harness continuity test device proposed by the present invention;

[0026] Figure 4 This is a top view of the structure of a low-voltage automotive wiring harness continuity test device proposed by the present invention;

[0027] Figure 5 This is a structural schematic diagram of the discharge part of a low-voltage automotive wiring harness continuity test device proposed by the present invention;

[0028] Figure 6 This is a top-sectional view of the structure of a low-voltage automotive wiring harness continuity test device proposed by the present invention;

[0029] Figure 7A low-voltage automotive wiring harness continuity test device proposed by the present invention Figure 6 A magnified schematic diagram of area A in the middle;

[0030] Figure 8 This is a connection diagram of the discharge part and the detection part of a low-voltage automobile wiring harness continuity test device proposed by the present invention.

[0031] In the figure: 1. Base plate; 2. Driving rod; 3. Turntable; 4. Discharging part; 41. Mounting seat; 411. Winding rod; 42. Plug; 43. Power terminal; 44. Support spring; 45. Connecting plate 1; 46. Ejecting plate; 47. Fixing plate; 48. Iron block; 49. Limit block; 5. Detection part; 51. Mounting frame; 52. Power supply; 53. Power terminal; 54. Electromagnet; 6. Driving part; 61. Stepping motor; 62. Chuck; 63. Chain; 7. Cleaning part; 71. Piston cylinder; 72. Piston rod; 73. Air guide tube; 74. Injection head; 75. Connecting plate 2; 8. Transmission part; 81. Gear; 82. Rack; 83. Connecting plate 3; 84. Notch; 9. Reset part; 91. Mounting piece; 92. Slide rod; 93. Slider; 94. Reset spring. DETAILED DESCRIPTION

[0032] In order to more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0033] Example

[0034] like Figures 1-8 As shown, one embodiment of the present invention provides a low-voltage automotive wiring harness continuity test device, comprising a base plate 1, a rotatable drive rod 2 mounted on top of the base plate 1 via a bearing, and a turntable 3 fixedly mounted on top of the drive rod 2. The turntable 3 has four sets of feeder sections 4 arranged in a circular array on its surface, which are used to install the wiring harness. Specifically, the feeder sections 4 include a mounting base 41 mounted on the surface of the turntable 3. A plug 42 is detachably connected to the bottom of the mounting base 41 via screws. The plug 42 is used to insert the two ends of the wiring harness, and the surface of the plug 42 is mounted with power terminals 43.

[0035] A detection unit 5 is provided on the left side of the turntable 3. The detection unit 5 is mounted on the top of the base plate 1 and is used to perform a conductivity test on the wire harness fixed there when the discharge section 4 rotates to this location. The detection unit 5 includes a mounting bracket 51 mounted above the base plate 1. A power supply 52 is mounted on the side of the mounting bracket 51. The power supply 52 is connected to two power terminals 53 by wires. The power terminals 53 are used to contact the power terminals 43 when the discharge section 4 moves to the detection unit 5, thereby performing a conductivity test on the plug 42. An electromagnet 54 is mounted on the back of the mounting bracket 51, and an iron block 48 is provided on the top of the mounting seat 41. When the wire harness conductivity is qualified, the electromagnet 54 is energized to attract the iron block 48, thereby achieving the detection of the wire harness conductivity. Actual tests have shown that the device can accurately detect the conductivity of the wire harness. For qualified wire harnesses, the electromagnet 54 can successfully attract the iron block 48.

[0036] In the present invention, a storage area 11 is provided on the surface of the bottom plate 1 below the detection unit 5. The discharge unit 4 also includes a top plate 46 that fits on the surface of the plug 42 and penetrates the mounting seat 41. A support spring 44 is installed between the inner wall of the top plate 46 and the mounting seat 41. A connecting plate 45 is installed on the top of the top plate 46, and a fixing plate 47 is installed on one side of the connecting plate 45. An iron block 48 is installed on the bottom of the fixing plate 47.

[0037] When the iron block 48 is attracted by the electromagnet 54, it drives the fixing plate 47 downward, which in turn drives the support spring 44 downward. The support spring 44 pushes the wire harness connected at the plug 42 into the storage area 11 for storage. In actual use, after the qualified wire harness is detected, this structure can smoothly push the wire harness to the storage area 11 for subsequent processing.

[0038] In the present invention, a squeeze block 32 is provided on the top of the turntable 3, and a defective product storage area 12 is installed on the rear surface of the bottom plate 1. The squeeze block 32 and the defective product storage area 12 are connected by a support rod 31. A limit block 49 is installed on the other side of the mounting base 41 located on the detection part 5.

[0039] When the stopper 49 moves to the bottom of the extrusion block 32, the extrusion block 32 squeezes and limits the stopper 49, causing the fixing plate 47 to drive the support spring 44 downward, thereby pushing the non-conductive wiring harness installed at the plug 42 into the defective product storage area 12 for storage. After multiple tests, this structure can accurately push the non-conductive wiring harness into the defective product storage area 12, realizing the classified storage of defective products.

[0040] In the present invention, a driving unit 6 is mounted on the top of the base plate 1, and is used to drive the rotation of the driving rod 2. The driving unit 6 includes a stepper motor 61 mounted on the top of the base plate 1. Chucks 62 are mounted on the surface of the driving rod 2 and the output end of the stepper motor 61, and a chain 63 is installed between the chucks 62.

[0041] When the stepper motor 61 is started, it drives the chuck 62 on the surface of the drive rod 2 to rotate through the chain 63, thereby driving the drive rod 2 to rotate. In actual operation, the stepper motor 61 can stably drive the drive rod 2 to rotate, causing the turntable 3 to rotate at the set speed and angle, meeting the process requirements of the wire harness inspection.

[0042] In the present invention, a cleaning unit 7 is mounted on the top of the base plate 1. This unit is used to spray air onto the bottom of the rightmost plug 42 to clean it. In actual operation, as the turntable 3 rotates, when the plug 42 rotates to the rightmost position, the air sprayed by the cleaning unit 7 effectively removes dust and impurities from the bottom of the plug 42. Multiple observations have shown that the surface of the cleaned plug 42 is clean, with no noticeable dust residue, ensuring the stability of the connection between the plug 42 and the wiring harness.

[0043] In the present invention, the cleaning unit 7 includes a piston cylinder 71 mounted on the top of the base plate 1. A piston rod 72 is inserted into the surface of the piston cylinder 71. The piston rod 72 is used to squeeze out the air in the piston cylinder 71. An air guide tube 73 is installed at the bottom of the piston cylinder 71. The air guide tube 73 is used to transport the air squeezed out from the piston cylinder 71. The end of the air guide tube 73 is installed with a nozzle 74. The nozzle 74 is set at the bottom of the plug 42.

[0044] When the piston rod 72 moves, the air in the piston cylinder 71 is squeezed out and transported to the nozzle 74 through the air guide tube 73. The nozzle 74 sprays the air onto the plug 42 to clean the plug 42. After actual testing, the cleaning structure can generate an airflow of sufficient intensity to effectively clean the dirt on the plug 42.

[0045] In the present invention, a transmission unit 8 is mounted on the top of the base plate 1. This unit is used to drive the movement of the piston rod 72. The transmission unit 8 comprises a gear 81 mounted on the surface of the drive rod 2 and rotating with the drive rod 2. A rack 82 is provided on one side of the gear 81. The rotation of the gear 81 drives the movement of the rack 82. A third connecting plate 83 is mounted on the end of the rack 82. A second connecting plate 75 is mounted on the end of the piston rod 72. The third connecting plate 83 is connected to the second connecting plate 75 via bolts.

[0046] When the drive rod 2 rotates, it drives the gear 81 to rotate, which in turn drives the rack 82 to move. The rack 82 drives the piston rod 72 to move via the third connecting plate 83 and the second connecting plate 75. After multiple operational tests, this transmission structure can stably convert the rotation of the drive rod 2 into the linear movement of the piston rod 72, thereby achieving the normal operation of the cleaning unit 7.

[0047] In the present invention, a notch 84 is provided at the gear 81, and a reset portion 9 is provided at the top of the base plate 1. The reset portion 9 is used to reset the rack 82 when the rack 82 contacts the notch 84. Actual observations show that when the rack 82 moves to contact the notch 84, the reset portion 9 can promptly function to restore the rack 82 to its initial position, thereby ensuring the normal operation of the transmission unit 8.

[0048] In the present invention, the reset portion 9 includes a mounting plate 91 mounted on the top of the base plate 1, a slide rod 92 is installed between the mounting plates 91, a slider 93 is slidably connected to the surface of the slide rod 92, the top of the slider 93 is connected to the connecting plate 3 83, and a reset spring 94 is installed between the slider 93 and the mounting plate 91.

[0049] When rack 82 contacts notch 84, slider 93 slides on slide rod 92 under the action of return spring 94, driving connecting plate 3 83 to move, thereby resetting rack 82. Multiple simulation tests have shown that return spring 94 provides sufficient elastic force to quickly reset slider 93, ensuring that rack 82 returns to its initial position in a timely manner and ensuring stable operation of the entire device.

[0050] Finally, it should be noted that while the basic concepts have been described above, it should be apparent to those skilled in the art that the detailed disclosure is provided merely as an example and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and revisions to this specification. Such modifications, improvements, and revisions are suggested throughout this specification and remain within the spirit and scope of the exemplary embodiments of this specification. Furthermore, this specification uses specific terms to describe the embodiments of this specification. For example, terms such as "one embodiment," "an embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "one embodiment," "an embodiment," or "an alternative embodiment" two or more times in different places in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of this specification may be appropriately combined. Furthermore, unless expressly provided in the claims, the order of the processing elements and sequences, the use of alphanumeric characters, or other designations described in this specification are not intended to limit the order of the processes and methods of this specification.

[0051] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A low-voltage automotive wiring harness continuity test device, comprising a base plate (1), characterized in that: A rotatable driving rod (2) is installed on the top of the base plate (1), and a turntable (3) is installed on the top of the driving rod (2). The surface of the turntable (3) is provided with four groups of discharge parts (4) in a circumferential array. The discharge parts (4) are used to install the wiring harness. A detection part (5) is provided on the left side of the turntable (3). The detection part (5) is installed on the top of the base plate (1) and is used to test the conductivity of the wiring harness fixed thereto when the discharge part (4) rotates thereto. The discharge part (4) includes a mounting seat (41) installed on the surface of the turntable (3). The bottom of the mounting seat (41) is detachably connected to a plug (42) by a screw. The plug (42) is used to insert the two ends of the wiring harness. The surface of the discharging portion (42) is provided with a power terminal (43), the detection portion (5) includes a mounting frame (51) mounted above the bottom plate (1), a power supply (52) is mounted on the side of the mounting frame (51), the power supply (52) is connected to two power terminals (53) by wire conduction, the power terminals (53) are used to contact the power terminals (43) when the discharge portion (4) moves to the detection portion (5), and are used to conduct the plug (42), an electromagnet (54) is installed on the back of the mounting frame (51), and an iron block (48) is provided on the top of the mounting seat (41), which is used to energize the electromagnet (54) to adsorb the iron block (48) when the wiring harness conductivity is qualified, so as to detect the wiring harness conductivity.

2. A low-voltage automotive wiring harness continuity test device according to claim 1, characterized in that: The surface of the bottom plate (1) is located below the detection part (5) and is provided with (11). The discharge part (4) also includes a top plate (46) attached to the surface of the plug (42) and penetrating the mounting seat (41). A support spring (44) is installed between the inner wall of the top plate (46) and the mounting seat (41). A connecting plate (45) is installed on the top of the top plate (46). A fixing plate (47) is installed on one side of the connecting plate (45). The iron block (48) is installed at the bottom of the fixing plate (47) and is used to drive the support spring (44) to move downward when the iron block (48) is adsorbed by the electromagnet (54), and is used for the support spring (44) to push the wiring harness connected at the plug (42) into the stop (11) for storage.

3. A low-voltage automotive wiring harness continuity test device according to claim 1, characterized in that: The top of the turntable (3) is provided with (32), and the surface of the bottom plate (1) is provided with (12) at the rear, and the (32) and (12) are connected by (31). The mounting seat (41) is provided with a limit block (49) on the other side of the detection part (5), and the (32) is used to squeeze and limit the limit block (49) when it moves to the bottom of (32), and is used to fix the plate (47) to drive the support spring (44) to move downward, and is used to push the non-conductive wire harness installed at the plug (42) into (12) for storage.

4. A low-voltage automotive wiring harness continuity test device according to claim 1, characterized in that: A driving part (6) is installed on the top of the base plate (1), and the driving part (6) is used to drive the rotation of the driving rod (2). The driving part (6) includes a stepping motor (61) installed on the top of the base plate (1), and chucks (62) are installed on the surface of the driving rod (2) and at the output end of the stepping motor (61). A chain (63) is installed between the chucks (62) and is used to drive the rotation of the driving rod (2) after the stepping motor (61) is started.

5. A low-voltage automotive wiring harness continuity test device according to claim 4, characterized in that: A cleaning portion (7) is installed on the top of the bottom plate (1), and the cleaning portion (7) is used to spray air to the bottom of the rightmost plug (42) for cleaning the plug (42).

6. A low-voltage automotive wiring harness continuity test device according to claim 5, characterized in that: The cleaning portion (7) comprises a piston cylinder (71) mounted on the top of the base plate (1); a piston rod (72) is inserted into the surface of the piston cylinder (71); the piston rod (72) is used to squeeze out the air in the piston cylinder (71); an air guide tube (73) is mounted at the bottom of the piston cylinder (71); the air guide tube (73) is used to transport the air squeezed out of the piston cylinder (71); a nozzle (74) is mounted at the end of the air guide tube (73); the nozzle (74) is arranged at the bottom of the plug (42) and is used to spray air onto the plug (42) for cleaning the plug (42).

7. A low-voltage automotive wiring harness continuity test device according to claim 6, characterized in that: A transmission part (8) is installed on the top of the base plate (1), and the transmission part (8) is used to drive the movement of the piston rod (72). The transmission part (8) includes a gear (81) installed on the surface of the driving rod (2) and rotates with the driving rod (2). A rack (82) is provided on one side of the gear (81). When the gear (81) rotates, it drives the movement of the rack (82). A connecting plate three (83) is installed at the end of the rack (82). A connecting plate two (75) is installed at the end of the piston rod (72). The connecting plate three (83) is connected to the connecting plate two (75).

8. A low-voltage automotive wiring harness continuity test device according to claim 7, characterized in that: A notch (84) is provided at the gear (81), and a reset portion (9) is provided at the top of the bottom plate (1). The reset portion (9) is used to reset the rack (82) when the rack (82) contacts the notch (84).

9. A low-voltage automotive wiring harness continuity test device according to claim 8, characterized in that: The reset portion (9) includes a mounting plate (91) mounted on the top of the base plate (1), a slide bar (92) is mounted between the mounting plates (91), a slider (93) is slidably connected to the surface of the slider bar (92), the top of the slider (93) is connected to the connecting plate (83), a reset spring (94) is mounted between the slider (93) and the mounting plate (91), and the reset spring (94) is used to reset the slider (93).

10. A low-voltage automobile wiring harness continuity test method, comprising a low-voltage automobile wiring harness continuity test device according to claims 1-9, characterized in that: The following steps are involved: The operator inserts the two ends of the low-voltage automobile wiring harness to be tested into the plug (42) of the discharge part (4), and the stepping motor (61) of the driving part (6) is started, and the driving rod (2) is driven to rotate through the chuck (62) and the chain (63), thereby rotating the turntable (3) and moving the discharge part (4) equipped with the wiring harness to the detection part (5); When the discharge portion (4) moves to the detection portion (5), the power terminal (53) of the detection portion (5) contacts the power terminal (43) of the discharge portion (4), and the power supply (52) supplies power to the plug (42) to perform a wiring harness conductivity test; If the wiring harness is of qualified conductivity, the electromagnet (54) is energized to attract the iron block (48), and the iron block (48) drives the fixed plate (47), the connecting plate (45) and the ejector plate (46) to move downward, the support spring (44) is compressed, and the ejector plate (46) pushes the conductive wiring harness to the surface of the bottom plate (1) and is stored in the (11) provided below the detection part (5); If the wiring harness is unqualified for conductivity, the turntable (3) continues to rotate, and when the limit block (49) moves to the bottom of (32) set on the top of the turntable (3), (32) squeezes the limit block (49) to limit the position, so that the fixed plate (47) drives the support spring (44) to move downward, pushing the non-conductive wiring harness to the surface of the bottom plate (1) located at the rear installed (12) for storage; During the rotation of the turntable (3), when the rightmost plug (42) rotates to a suitable position, the gear (81) on the surface of the driving rod (2) rotates, driving the rack (82) to move, and the rack (82) drives the piston rod (72) to move in the piston cylinder (71) through the connecting plate three (83) and the connecting plate two (75), and the air in the piston cylinder (71) is sprayed to the bottom of the plug (42) through the air guide pipe (73) and the nozzle (74), thereby cleaning the plug (42); When the gear (81) rotates until the notch (84) contacts the rack (82), the reset spring (94) of the reset portion (9) drives the rack (82) to reset through the slider (93), so as to drive the piston rod (72) to move for cleaning work next time.

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