Automobile wire harness detection device and system

Abstract

The invention relates to the technical field of automobile part detection, in particular to an automobile wire harness detection device and system.The automobile wire harness detection device is characterized in that a plurality of core columns are installed on each cross beam driven by a lead screw mechanism at intervals, the ends of the core columns are sleeved with driven gears in a running fit mode, and the core columns and the driven gears are connected through tension sensing assemblies; a wire harness socket is arranged at the end part of the driven gear; the driven gear is meshed with a driving gear, and a sliding gear is installed on a gear shaft of the driving gear. Two limiting contact elements are in threaded fit with the second screw rod mechanism and can control an electromagnet mounted at one end of the gear shaft; the testing motor can frequently rotate forwards and backwards, gear tooth end faces of the gear disc on the main shaft and the sliding gear are blade-shaped, and the gear disc and the sliding gear are in meshed connection. And when the end part of the cross beam is in contact with the limiting contact element, the electromagnet is electrified to attract the sliding gear to a position meshed with the gear disc. According to the invention, the detection of the automobile wire harness can be rapidly and accurately carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts detection, and in particular to an automobile wiring harness detection device and system. Background Art

[0002] As a key component of a vehicle's electrical system, automotive wiring harnesses carry the crucial tasks of power and signal transmission. Their quality is directly related to the vehicle's safety, reliability, and comfort. However, during the production and use of automotive wiring harnesses, various problems may arise, such as wire breaks, short circuits, insulation damage, poor contact, and accidental disconnection due to loose connections. These problems can lead to malfunctions in the vehicle's electrical equipment and even safety accidents.

[0003] Testing automotive wiring harnesses involves not only continuity testing but also mechanical performance testing. While many existing technologies exist for continuity testing, most often employ continuity testing circuits capable of simultaneously testing the continuity of multiple wires, or signal lines, within the wiring harness. Mechanical performance testing, on the other hand, involves testing the connection strength and the tensile and torsional resistance of the wiring harness. Generally, tensile and torsional tests are performed to test the mechanical properties of automotive wiring harnesses, stretching and twisting them, respectively. A tensile testing machine can measure parameters such as tensile strength and elongation during the stretching process, while a torsional testing machine can measure the torsional resistance and torsional fatigue life of the harness during the twisting process. These parameters are crucial for evaluating the durability and reliability of wiring harnesses during actual automotive use.

[0004] Generally speaking, cars experience various road conditions while driving, which inevitably produce vibrations and bumps. This requires that automotive wiring harnesses have sufficient mechanical connection strength to withstand the repeated stress caused by vibration. It is very important to conduct a tensile test to determine whether the wiring harness will break when connected to a qualified wiring harness socket under tension or torsion, or whether the connection terminals will fall off the wiring harness socket. This can assess the wiring harness's ability to withstand tensile forces and avoid wire breakage or loose connections due to vibration, thereby ensuring the stable transmission of electrical signals and power. For example, the wiring harness in the engine compartment will generate continuous vibration due to the operation of the engine. If the wiring harness has poor mechanical properties, long-term vibration may cause the metal wires inside the wires to break, causing electrical failures.

[0005] Furthermore, some automotive components undergo relative motion during operation, such as when doors open and close or seats are adjusted. The wiring harnesses connecting these components must exhibit excellent flexibility and torsional resistance. Torsion testing can assess the harness's torsional resistance and torsional fatigue life during torsion, ensuring that the harness maintains normal electrical performance despite the torsional forces caused by component movement. Otherwise, frequent torsion can damage the harness's insulation, causing short circuits between wires and impacting the proper operation of related equipment.

[0006] Existing automotive wiring harness testing equipment generally performs tensile and torsional tests on tensile testing machines and torsional testing machines respectively. This is inefficient and the simulated motion environment is relatively simple. It can only perform testing from axial tension and single-head rotation. The tensile and torsional resistance tests are not sufficient and comprehensive. Summary of the Invention

[0007] The purpose of the present invention is to provide an automobile wiring harness detection device and system, which can solve the problems of small number of one-time detection, low efficiency and relatively single detection method when detecting automobile wiring harnesses in the prior art.

[0008] To achieve the above-mentioned object, the present invention provides an automobile wiring harness detection device, comprising a mechanical performance testing unit arranged on a base plate, the mechanical performance testing unit comprising a first crossbeam and a second crossbeam driven by a first screw mechanism, a plurality of core columns being installed at intervals on each crossbeam, a driven gear being rotatably fitted on the end of each core column, and the core column and the driven gear being axially connected together via a tension sensing assembly, a wiring harness socket being provided at the ends of each pair of driven gears facing each other, and all the driven gears on each crossbeam being meshed in sequence; a driven gear on each crossbeam is meshed with a driving gear, the driving gear being rotatably mounted on the crossbeam via a gear shaft, and a sliding gear being axially slidably mounted on the gear shaft; and further comprising a parallel first wire. The rod mechanism is provided with a second screw mechanism, and the second screw mechanism is threaded with two limit contact elements, and the limit contact element can control an electromagnet installed at one end of the gear shaft; the screws of the two screw mechanisms have two sections of threads that are symmetrically arranged but rotate in opposite directions, and one end of the screw of the first screw mechanism is connected to the main shaft of a test motor through a sliding component, and the test motor can rotate forward and reverse frequently. A gear plate is installed on the main shaft, and the gear plate and the gear tooth end faces of the sliding gear are both blade-shaped, so that the gear plate and the sliding gear can be axially approached arbitrarily to achieve meshing connection; when the end of the beam contacts the limit contact element, the main shaft and the screw rotate relative to each other, and the electromagnet is energized to attract the sliding gear to a position meshing with the gear plate.

[0009] Among them, the tension sensing assembly includes a tension sensor, a pull rod, and a stepped cone. The tension sensor is embedded in one end of the core column located in the driven gear. The tension sensor is connected to the stepped cone through the pull rod. The driven gear rotates around the stepped cone, and the wiring harness socket is located directly below the stepped cone.

[0010] Among them, one end of the driven gear has a cylindrical socket section with a smooth surface, and the wiring harness socket is located on the end face of the socket section. A conductive ring installed on the support frame is sleeved on the outer side of the socket section. The support frame is slidably installed on the base plate, and the socket section can rotate in the conductive ring. The inner wall of the conductive ring contacts the conductive contact pins arranged in a ring array in the socket section. The conductive contact pins are connected one-to-one with the pins in the wiring harness socket. A number of wires are also connected to the end of the conductive ring. An indicator light is installed on the circuit where each wire is located to indicate whether the connection of each pin is normal when the plug of the automobile wiring harness is inserted into the wiring harness socket.

[0011] The support frame includes a pair of insulating support legs arranged opposite to each other, and the bottom ends of the insulating support legs are slidably mounted on the base plate along a direction parallel to the axial direction of the driven gear.

[0012] The conductive ring is surrounded by a number of arc-shaped conductors, and two adjacent arc-shaped conductors are connected together by insulating strips.

[0013] Among them, the cross-section of the insulating strip on the side exposed from the inner wall of the conductive ring is an isosceles triangle with a rounded top end, the conductive contact pin is axially elastically and telescopically installed in the socket section, and the end of the conductive contact pin exposed from the side of the socket section is conical, so that when the conical end of the conductive contact pin slides along the circumference of the inner wall of the conductive ring, it can pass over the insulating strip and stay on the inner wall of one of the arc-shaped conductors.

[0014] The conductive ring is mounted on the support frame via a plurality of limit springs, so that the conductive ring can be reset after being adaptively twisted around the axis under the action of an external force.

[0015] Among them, the slipping component includes a guide column and two magnets that attract and contact each other and are fixed at the end of the main shaft and the end of the screw respectively. The guide column is coaxially fixed at the end of the main shaft and freely passes through the two magnets and is axially inserted into the end of the screw.

[0016] Among them, the gear shaft is rotatably installed through a sleeve, the sleeve is fixed on the crossbeam, and the end of the sleeve is connected to the sliding gear through a connecting spring. The inner wall of the shaft hole of the sliding gear has a sliding groove, and a guide key is fixed on the gear shaft. The guide key is installed in the sliding groove in a sliding fit. In the assembled state, the connecting spring makes the guide key contact with one end of the sliding groove close to the electromagnet. When the electromagnet is energized, the sliding gear slides along the gear shaft to a position engaged with the gear plate.

[0017] In addition, the present invention also provides an automotive wiring harness detection system, comprising the aforementioned automotive wiring harness detection device and a controller for controlling the automotive wiring harness detection device, the controller comprising three control modules; the screw of the second screw mechanism is driven by a micro motor, wherein when the first control module drives the micro motor to rotate, the two limit contact elements first slide to a position where the distance between them is greater than the length of the automotive wiring harness to be tested, and then the test motor is driven to move the two crossbeams away from each other until all automotive wiring harnesses are disengaged from the wiring harness socket, and the detection values ​​of all tension sensor components are recorded;

[0018] When the second control module drives the micro motor to rotate, the two limit contact elements move away from each other to the position where the automobile wiring harness is stretched straight, and then the test motor is driven to move the two beams away from each other to the position where they contact the corresponding limit contact elements. After that, the test motor is driven to rotate forward and reverse alternately several times, and the detection value of the tension sensor component is recorded during this period.

[0019] When the third control module drives the micro motor to rotate, the two limit contact elements move away from each other to the extreme position where they are always out of contact with the limit contact elements, and then drives the test motor to move the two beams away from each other until all the vehicle wiring harnesses are disconnected from the wiring harness sockets, and records the detection values ​​of all tension sensor components.

[0020] An automobile wiring harness detection device and system of the present invention can automatically detect the tensile and torsional properties of multiple automobile wiring harnesses at the same time. Not only can multiple automobile wiring harnesses be detected at one time, but tensile and torsional tests can also be performed in one device, integrating the two tests into one. Moreover, the conductivity can even be intuitively tested through indicator lights, etc., not only completing the mechanical performance test, but also when setting indicator lights and electrical components such as ammeters that are adaptively connected in series by technical personnel in this field, it can also simulate and display whether the electrical indicators such as the current value corresponding to each signal line under the set input are qualified, thereby more completely realizing the automobile wiring harness conductivity test, which undoubtedly greatly improves the detection efficiency.

[0021] In addition, the present invention also has three detection modes, which respectively perform a simple tensile test, a single torsion test, and a comprehensive test combining tensile and torsion on the automobile wiring harness, so as to more fully detect the automobile wiring harness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0023] Figure 1 It is a schematic top view of the present invention;

[0024] Figure 2 It is an enlarged view of the connection structure between the automobile wiring harness and the wiring harness socket in the present invention;

[0025] Figure 3 yes Figure 1 An enlarged structural diagram at A in the middle;

[0026] Figure 4 yes Figure 3 A schematic diagram of the structure of the sliding gear before it slides;

[0027] Figure 5 It is a schematic diagram of the end face of a gear with a blade-shaped end face of the gear teeth;

[0028] Figure 6-Figure 7 It is a schematic diagram of the meshing process between the teeth of the blade-shaped end faces;

[0029] Figure 8 This is another schematic diagram of a gear tooth with a blade-like end face;

[0030] Figure 9 This is a schematic diagram of the installation structure of a conductive ring;

[0031] Figure 10 This is a schematic diagram of the first structure of the conductive ring;

[0032] Figure 11 It is a schematic diagram of the second structure of the conductive ring;

[0033] Figure 12 It is a structural diagram of a slip assembly;

[0034] Figure 13 It is a schematic diagram of the appearance of an automobile wiring harness.

[0035] In the figure: base plate 1, first screw mechanism 2, second screw mechanism 3, crossbeam 4, driven gear 5, socket section 502, core column 6, tension sensor 7, pull rod 8, stepped cone 9, automotive wiring harness 10, connecting terminal 1001, driving gear 11, bushing 12, threaded block 13, limit contact element 14, sliding gear 15, slide groove 1501, test motor 16, gear plate 17, slip assembly 18, main shaft 19, magnet 1901, guide column 1902, electromagnet 20, guide key 21, connecting spring 22, gear shaft 23, conductive ring 24, arc conductor 2401, insulating strip 2402, insulating support foot 25, conductive contact pin 26, wire 27, limit spring 28, pin 29, indicator light 30, power supply 31. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] As one of the embodiments of the present invention, a vehicle wiring harness detection device is described in detail, which can be used to detect Figure 13 The common automotive wiring harness shown in the figure has a structure such as Figure 1 As shown, it mainly includes a mechanical performance testing unit provided on the bottom plate 1 to test the stability of the automobile wiring harness 10 when it is plugged into the corresponding wiring harness socket. Specifically, the mechanical performance testing unit in this embodiment is referred to in conjunction with Figure 2-Figure 4 The system primarily comprises two spaced-apart crossbeams 4 driven by a first screw mechanism 2. The two crossbeams 4 are parallel to each other. Specifically, the first screw mechanism 2 can be mounted on one side of a base plate 1, while a guide rod is fixed to the other side of the base plate 1. The guide rod is parallel to the screw of the first screw mechanism 2. During installation, one end of the crossbeam 4 is threaded onto the screw of the first screw mechanism 2 via a threaded block 13, forming a threaded pair. The other end of the crossbeam 4 is slidably mounted onto the guide rod and perpendicular to the guide rod. That is, the guide rod passes vertically through the crossbeam 4 to guide the movement of the crossbeam 4. More specifically, each crossbeam 4 is also spaced apart and mounted with a plurality of core posts 6. These core posts 6 can be integrally fixed to the crossbeam 4 and move with the crossbeam 4. A driven gear 5 is rotatably mounted on the end of each core post 6. That is, the driven gear 5 can rotate around the core post 6. The end of the driven gear 5 is provided with the aforementioned wiring harness socket for inserting the automotive wiring harness 10. In addition, in this embodiment, the core column 6 and the driven gear 5 are axially connected together through a tension sensing assembly. Therefore, when the crossbeam 4 moves, and the core column 6 moves with it, the driven gear 5 is pulled axially by the tension sensing assembly. Ignoring factors such as slight friction, it can be considered that when the automobile wiring harness 10 is inserted into the wiring harness socket, the automobile wiring harness 10 is straightened, and the plug-in bite force between the automobile wiring harness 10 and the wiring harness socket is equal to the pull force on the driven gear 5 by the tension sensing assembly, that is, the tension value of the tension sensing assembly when the automobile wiring harness 10 is separated from the wiring harness socket, which is equal to the magnitude of the pulling force when the two are separated. Therefore, it is intuitive to determine whether the bite force of the automobile wiring harness 10 when plugged in meets the design requirements. During production, each pair of driven gears 5 facing each other are provided with a wiring harness socket at the end to realize the detection of one automobile wiring harness 10. All driven gears 5 on each crossbeam 4 are meshed in sequence, and then multiple automobile wiring harnesses 10 of the same specification can be detected at one time. As a specific design structure, such as Figure 1(For clarity and simplicity, only the driving gear 11 and its accessories on one of the beams 4 are drawn in the figure). It is necessary to engage a driving gear 11 with one of the driven gears 5 on each beam 4 to drive the plugs or connection terminals 1001 at both ends of the vehicle wiring harness 10 to perform a torsion test within a certain angle range.

[0038] In the above embodiments, Figure 1 As shown, the driving gear 11 is rotatably mounted on the crossbeam 4 via the gear shaft 23, so that the driving gear 11 moves along with the crossbeam 4. All the driving gears 11 are always in meshing state. In addition, a sliding gear 15 is axially slidably mounted on the gear shaft 23. Under certain conditions, the sliding gear 15 can slide axially along the gear shaft 23. This embodiment also includes a second screw mechanism 3 arranged parallel to the first screw mechanism 2. The thread on the second screw mechanism 3 is as shown in FIG. Figure 1 The two limit contact elements 14 shown are capable of controlling an electromagnet 20 mounted at one end of a gear shaft 23. When the crossbeam 4 moves, it directly or indirectly contacts the limit contact element 14 and is unable to continue moving in the existing direction. Furthermore, the electromagnet 20 is momentarily energized. Specifically, a switch button that can control the on / off power of the electromagnet 20 is provided on the side of the limit contact element 14. When pressed, the electromagnet 20 is energized. When released, the electromagnet 20 automatically rebounds and resets, de-energizing the electromagnet 20. In the above embodiments, the screws of the two screw mechanisms are symmetrically arranged, but with two sections of threads that rotate in opposite directions, thereby allowing the corresponding pair of components to move away from or toward each other. Furthermore, another key design is that one end of the screw of the first screw mechanism 2 is specifically connected to the spindle 19 of a test motor 16 via a slip assembly 18. Under normal conditions, the screw and spindle 19 rotate synchronously. When the screw is prevented from rotating, the spindle 19 will break away from its fixed connection with the screw and rotate relative to it. In order to better realize the torsion test of the automobile wiring harness 10, the test motor 16 can frequently rotate forward and reverse. For example, it can rotate forward to make the end of the automobile wiring harness 10 rotate forward 45 degrees, and then immediately reverse to make the end of the automobile wiring harness 10 rotate backward 45 degrees, simulating the situation that the automobile wiring harness 10 is twisted due to external force. In order to realize this torsion design, a gear plate 17 needs to be installed on the main shaft 19, such as Figure 5-Figure 7As shown, the gear plate 17 and the sliding gear 15 have blade-shaped tooth end faces. This is to ensure that the gear plate 17 and the sliding gear 15 can be meshed at any time when they are axially close together. Because of the special shape of the tooth end faces, even if the teeth of one gear are not directly facing the two teeth of the gear to be meshed, the corresponding teeth can adaptively enter between the two teeth of the other gear, thereby achieving meshing. In addition, if necessary, the aforementioned driven gear 5 and its mating gear can also adaptively refer to this structure. As a specific manufacturing structure, when the above-mentioned teeth are used as the teeth of the involute gear, they can be as follows Figure 8 In specific operation, when the end of the crossbeam 4 contacts the limit contact element 14, the screw cannot continue to rotate, the main shaft 19 and the screw rotate relative to each other, and the electromagnet 20 is energized, thereby attracting the sliding gear 15 to a position that meshes with the gear plate 17, causing all the driven gears 5 to rotate, realizing the torsion test.

[0039] In this embodiment, Figure 1-Figure 2 As shown, the tension sensing assembly includes a tension sensor 7, a pull rod 8, and a stepped cone 9. The core column 6 is located at one end of the driven gear 5, and the tension sensor 7 is embedded in it. The tension sensor 7 is connected to the stepped cone 9 through the pull rod 8. The driven gear 5 rotates around the stepped cone 9, and the wiring harness socket is preferably located directly below the stepped cone 9.

[0040] In this embodiment, Figure 2 As shown, one end of the driven gear 5 has a cylindrical socket section 502 with a smooth surface. This socket section 502 can actually be a round shaft integrally formed with the driven gear 5, and the wiring harness socket is located on the end face of the socket section 502. In addition, a conductive ring 24 mounted on a support frame is sleeved on the outer side of the socket section 502. The support frame is slidably mounted on the base plate 1, and the socket section 502 can rotate within the conductive ring 24. The above support frame includes a pair of oppositely arranged insulating support feet 25, and the bottom ends of the insulating support feet 25 are slidably mounted on the base plate 1 along a direction parallel to the axial direction of the driven gear 5. The inner wall of the conductive ring 24 of this embodiment contacts a plurality of conductive contact pins 26 arranged in a ring array within the socket section 502, as shown in FIG. Figure 11As shown, these conductive contact pins 26 are connected one-to-one with pins 29 in the wiring harness socket. The end of the conductive ring 24 is also connected to a number of wires 27. Each wire 27 is connected to a circuit with an indicator light 30 installed. This circuit is also equipped with a power supply 31. It should be noted that the indicator light 30 is actually an indicator element that indicates whether the corresponding signal circuit is normal. It can also be adaptively connected with electrical components such as ammeters and voltmeters. The purpose is to simulate whether the relationship between the input and output of the corresponding signal circuit meets the design standards. These can be adaptively designed with reference to existing conductivity test circuits and will not be described in detail in this embodiment. When the automobile wiring harness 10 is properly plugged into the wiring harness socket, the indicator light 30 lights up, indicating that the pins of the automobile wiring harness 10 are properly connected when the plug is inserted into the wiring harness socket.

[0041] In actual use, in order to avoid the possible error in the detection result caused by sharing a conductive ring 24 as a common conductor element, in particular, Figure 10 In this embodiment, the conductive ring 24 is surrounded by a plurality of arc-shaped conductors 2401, and adjacent arc-shaped conductors 2401 are connected together by insulating strips 2402. In this way, when the test is completed, the driven gear 5 rotates to a stop position, so that the corresponding conductive contact pins 26 are in contact with the corresponding arc-shaped conductor 2401 instead of the insulating strip 2402. This ensures that the circuits composed of the pins or pins 29 of each automotive wiring harness 10 are completely independent and there will be no problem of mutual influence.

[0042] Based on the above design, a better design structure is as follows Figure 11 As shown, the cross-section of the insulating strip 2402 exposed on the inner sidewall of the conductive ring 24 is formed into an isosceles triangle with a rounded top. The conductive contact pin 26 is axially and elastically mounted within the socket section 502. Furthermore, the end of the conductive contact pin 26 exposed on the side of the socket section 502 is conical. This allows the conical end of the conductive contact pin 26 to slide along the circumference of the inner sidewall of the conductive ring 24, passing over the insulating strip 2402. Furthermore, due to the special cross-sectional shape of the isosceles triangle, the conical end automatically slides to the inner sidewall of the arc-shaped conductor 2401 to remain stable, that is, to rest on the inner sidewall of one of the arc-shaped conductors 2401. This ensures that each pin is connected to only one arc-shaped conductor 2401, forming a closed circuit for the indicator light 30 corresponding to a single controller. Compared to the aforementioned embodiment, this embodiment does not require the position at which the driven gear 5 finally stops rotating. As long as the automotive wiring harness 10 is of good quality, the indicator light 30 can remain illuminated throughout the twisting process. In practice, in order to make the conical end slide more reliably to contact the inner wall of the arc conductor 2401, as shown in FIG. Figure 9As shown, the conductive ring 24 is mounted on the support frame via a number of limit springs 28, which define the initial position of the conductor 27. This allows the conductive ring 24 to adaptively twist around its axis under external force and then return to its original position. When the conical end is in contact with the insulating strip 2402, its elastic thrust causes the conductive ring 24 to rotate slightly, allowing the conical end to slide to the inner wall of the arc-shaped conductor 2401.

[0043] As for the design of relative rotation between the driving and the screw rod, the corresponding sliding component 18 is as follows: Figure 12 As shown, it includes a guide column 1902, and two magnets 1901 fixed at the end of the main shaft 19 and the end of the screw respectively, which are attracted to each other. The guide column 1902 is coaxially fixed to the end of the main shaft 19, and after freely passing through the two magnets 1901, it is axially inserted into the end of the screw. The guide column 1902 can rotate inside the end of the screw. When the threaded block 13 on the beam 4 touches the limiting contact element 14, the screw cannot continue to rotate. The continued rotation of the micro motor will cause the two magnets 1901 to rotate relative to each other, and the main shaft 19 and the screw rotate relative to each other.

[0044] In this embodiment, Figure 1 as well as Figure 3-Figure 4 The gear shaft 23 is rotatably mounted via the sleeve 12, which is directly fixed to the crossbeam 4. The end of the sleeve 12 is connected to the sliding gear 15 via a connecting spring 22. A sliding groove 1501 is formed on the inner wall of the shaft hole of the sliding gear 15. In addition, a guide key 21 is fixed to the gear shaft 23. The guide key 21 is slidably mounted in the sliding groove 1501. In the assembled state, the connecting spring 22 forces the driven gear 5 to abut against the side of the driven gear 5, causing the guide key 21 to contact the end of the sliding groove 1501 near the electromagnet 20. In use, when the electromagnet 20 is energized, the sliding gear 15 is attracted by the electromagnet 20, overcoming the elastic force of the connecting spring 22 and sliding along the gear shaft 23 to a position engaged with the gear plate 17.

[0045] Based on the above embodiment, as another specific embodiment, an automotive wiring harness detection system is introduced, which mainly includes the aforementioned automotive wiring harness detection device and a controller for controlling the automotive wiring harness detection device. Specifically, the controller includes three control modules. During detection, the three control modules are activated one by one to simulate three detection scenarios. In this embodiment, the screw of the second screw mechanism 3 is driven by a micro motor.

[0046] When the first control module of this embodiment drives the micromotor to rotate, the two limiting contact elements 14 first slide to a position where the distance between them is greater than the length of the automotive wiring harness 10 to be tested. This allows the automotive wiring harness 10 to be fully pulled in both directions without being constrained by the limiting contact elements 14, and at this point, the driven gear 5 and gear plate 17 do not contact each other. The test motor 16 is then driven to move the two crossbeams 4 away from each other until all automotive wiring harnesses 10 are disengaged from the wiring harness sockets. The detection values ​​of all tension sensor components are recorded to test the pullout performance of each automotive wiring harness 10.

[0047] When the second control module of this embodiment drives the micro motor to rotate, the two limit contact elements 14 move away from each other to the position where the automobile wiring harness 10 is stretched straight. The distance between the two limit contact elements 14 can generally be set. The second control module then drives the test motor 16 to move the two crossbeams 4 away from each other until they contact the corresponding limit contact elements 14. While the screw rod stops rotating, the electromagnet 20 is energized and the driven gear 5 begins to rotate. After that, the test motor 16 rotates forward and reverse several times alternately and records the detection value of the tension sensor component during this period. The change in the detection value can be used to intuitively see the stability of the connection of the automobile wiring harness 10 during the torsion period. It can also be determined whether the automobile wiring harness 10 is qualified based on whether the automobile wiring harness 10 directly falls off during the period, thereby realizing a separate test of the torsion performance of the automobile wiring harness 10.

[0048] When the third control module in this embodiment drives the micromotor to rotate, it causes the two limit contact elements 14 to move away from each other to their limit positions, where they never contact the limit contact elements 14. Specifically, the limit contact elements 14 are positioned as far apart as possible. Even when the sliding gear 15 engages the gear plate 17, the end of the crossbeam 4 will not be blocked by the limit contact elements 14 and stop moving. The third control module then drives the test motor 16 to move the two crossbeams 4 away from each other until all vehicle wiring harnesses 10 are disengaged from the wiring harness socket. The module then records the detection values ​​of all tension sensor components to observe whether any are disengaged, thereby achieving performance testing of the vehicle wiring harness 10 under the combined effects of pulling and torsion.

[0049] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. An automobile wiring harness detection device, comprising a mechanical performance testing unit arranged on a base plate (1), characterized in that: The mechanical property testing unit comprises two crossbeams (4) driven by a first screw mechanism (2), a plurality of core columns (6) are installed on each crossbeam (4) at intervals, a driven gear (5) is rotatably fitted on the end of each core column (6), and the core column (6) and the driven gear (5) are axially connected together via a tension sensor assembly, a wiring harness socket is provided at the ends of each pair of driven gears (5) facing each other, and all the driven gears (5) on each crossbeam (4) are meshed in sequence; A driven gear (5) on each crossbeam (4) is meshed with a driving gear (11), and the driving gear (11) is rotatably mounted on the crossbeam (4) via a gear shaft (23), and a sliding gear (15) is also axially slidably mounted on the gear shaft (23); The invention also includes a second screw mechanism (3) arranged in parallel with the first screw mechanism (2), wherein the second screw mechanism (3) is threadedly matched with two limit contact elements (14), and the limit contact element (14) can control an electromagnet (20) installed at one end of the gear shaft (23); the screws of the two screw mechanisms have two sections of threads arranged symmetrically but with opposite rotation directions, and one end of the screw of the first screw mechanism (2) is connected to the main shaft (19) of a test motor (16) through a slip assembly (18), and the test motor (16) can frequently rotate forward and reverse, and a gear plate (17) is installed on the main shaft (19), and the gear tooth end faces of the gear plate (17) and the sliding gear (15) are both blade-shaped, so that the gear plate (17) and the sliding gear (15) can be arbitrarily axially approached to achieve meshing connection; When the end of the crossbeam (4) contacts the limit contact element (14), the main shaft (19) and the screw rod rotate relative to each other, and the electromagnet (20) is energized to attract the sliding gear (15) to a position where it meshes with the gear plate (17).

2. The automotive wiring harness detection device according to claim 1, wherein: The tension sensing assembly includes a tension sensor (7), a pull rod (8), and a stepped cone (9). The tension sensor (7) is embedded in one end of the core column (6) located in the driven gear (5). The tension sensor (7) is connected to the stepped cone (9) through the pull rod (8). The driven gear (5) rotates around the stepped cone (9). The wiring harness socket is located directly below the stepped cone (9).

3. The automobile wiring harness detection device according to claim 1, wherein: One end of the driven gear (5) has a cylindrical socket section (502) with a smooth surface. The wiring harness socket is located on the end face of the socket section (502). A conductive ring (24) mounted on a support frame is sleeved on the outer side of the socket section (502). The support frame is slidably mounted on the base plate (1), and the socket section (502) can rotate in the conductive ring (24). The inner wall of the conductive ring (24) contacts the conductive contact pins (26) arranged in a ring array in the socket section (502). The conductive contact pins (26) are connected to the pins (29) in the wiring harness socket in a one-to-one correspondence. The end of the conductive ring (24) is also connected to a plurality of wires (27). An indicator light (30) is installed on the circuit where each wire (27) is located to indicate whether the connection of each pin is normal when the plug of the automobile wiring harness (10) is inserted into the wiring harness socket.

4. The automobile wiring harness detection device according to claim 3, characterized in that: The support frame comprises a pair of insulating support legs (25) arranged opposite to each other, and the bottom ends of the insulating support legs (25) are slidably mounted on the base plate (1) along a direction parallel to the axial direction of the driven gear (5).

5. The automobile wiring harness detection device according to claim 3, characterized in that: The conductive ring (24) is surrounded by a plurality of arc-shaped conductors (2401), and two adjacent arc-shaped conductors (2401) are connected together via an insulating strip (2402).

6. The automobile wiring harness detection device according to claim 5, characterized in that: The cross section of the insulating strip (2402) exposed on the inner side wall of the conductive ring (24) is an isosceles triangle with a rounded top end. The conductive contact pin (26) is axially elastically and telescopically installed in the socket section (502), and the end of the conductive contact pin (26) exposed on the side of the socket section (502) is conical, so that when the conical end of the conductive contact pin (26) slides along the circumference of the inner side wall of the conductive ring (24), it can pass over the insulating strip (2402) and stay on the inner side wall of one of the arc-shaped conductors (2401).

7. The automobile wiring harness detection device according to claim 6, characterized in that: The conductive ring (24) is mounted on the support frame via a plurality of limit springs (28), so that the conductive ring (24) can be reset after adaptively twisting around the axis under the action of an external force.

8. The automobile wiring harness detection device according to claim 1, wherein: The slip assembly (18) includes a guide column (1902) and two magnets (1901) fixed to the end of the main shaft (19) and the end of the screw rod respectively, which are attracted to each other. The guide column (1902) is coaxially fixed to the end of the main shaft (19) and freely passes through the two magnets (1901) and is axially inserted into the end of the screw rod.

9. The automobile wiring harness detection device according to claim 1, wherein: The gear shaft (23) is rotatably installed through a shaft sleeve (12), and the shaft sleeve (12) is fixed on the crossbeam (4). The end of the shaft sleeve (12) is connected to the sliding gear (15) through a connecting spring (22). The inner wall of the shaft hole of the sliding gear (15) has a sliding groove (1501). A guide key (21) is fixed on the gear shaft (23), and the guide key (21) is installed in the sliding groove (1501) in a sliding manner. In the assembled state, the connecting spring (22) makes the guide key (21) contact with the sliding groove (1501) by one end of the electromagnet (20). When the electromagnet (20) is energized, the sliding gear (15) slides along the gear shaft (23) to a position engaged with the gear plate (17).

10. An automobile wiring harness detection system, characterized in that: The invention comprises an automobile wiring harness detection device according to any one of claims 1 to 9, and a controller for controlling the automobile wiring harness detection device, wherein the controller comprises three control modules; the screw of the second screw mechanism (3) is driven by a micro motor, wherein: When the first control module drives the micro motor to rotate, the two limit contact elements (14) first slide to a position where the distance between them is greater than the length of the automobile wiring harness (10) to be tested, and then drive the test motor (16) to move the two beams (4) away from each other until all automobile wiring harnesses (10) are disengaged from the wiring harness socket, and record the detection values ​​of all tension sensor components; When the second control module drives the micro motor to rotate, the two limit contact elements (14) move in opposite directions to a position where the automobile wiring harness (10) is stretched straight, and then the test motor (16) is driven to move the two beams (4) away from each other to a position where they contact the corresponding limit contact elements (14), and then the test motor (16) is driven to rotate forward and reverse alternately several times, and the detection value of the tension sensor component is recorded during the period; When the third control module drives the micro motor to rotate, the two limit contact elements (14) move away from each other to a limit position where they are always out of contact with the limit contact elements (14), and then drives the test motor (16) to move the two beams (4) away from each other until all the automobile wiring harnesses (10) are disconnected from the wiring harness socket, and the detection values ​​of all tension sensor components are recorded.

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