A wiring harness continuity detection device

Abstract

The present invention belongs to the technical field of wire harness continuity detection, and in particular, relates to a wire harness continuity detection device, comprising: a detection platform; a detection mechanism, wherein the detection mechanism is provided in multiple groups and a linear array is distributed above the detection platform, and each group of the detection mechanism includes two installation frames symmetrically arranged above the detection platform, and the two installation frames are respectively provided with test terminals connected to the two ends of the wire; an adaptive clamping mechanism, wherein the adaptive clamping mechanism is provided in multiple groups and is respectively used in conjunction with each installation frame, and is used to adaptively clamp and fix the wire according to the diameter of the wire. By providing an adaptive clamping mechanism, the present invention can adaptively clamp and fix the wire according to its diameter, thereby improving the fixing effect of wires of different diameters in the wire harness, improving the stability of the wire connection, and avoiding affecting the continuity detection of the wire.

Description

Technical Field

[0001] The invention belongs to the technical field of wire harness continuity detection, and in particular relates to a wire harness continuity detection device. Background Art

[0002] A wiring harness is a system consisting of multiple wires, cables and their related connectors, plugs, terminals, etc., which is used to connect various parts of electrical equipment. It is usually designed as an integrated structure that can transmit power, signals and data in electronic products, automobiles, electrical equipment, etc.

[0003] After the wire harness is produced, it is often necessary to perform a continuity test to detect whether the electrical wiring in the wire harness has open circuits, short circuits, poor contact or other faults, to ensure that each line in the wire harness can transmit current correctly and avoid faults caused by line damage or poor contact.

[0004] When the wiring harness is used in some complex equipment or vehicles, it is necessary to set wires of different lengths to adapt to different physical spaces and connection positions to meet the actual installation space and layout requirements. For example, in some automotive electrical systems, since there are multiple subsystems, such as lighting, electric windows, air conditioning, engine control module (ECM), etc., and these subsystems are located in different positions, it is necessary to make the wire lengths different to meet the connection between the main system and the subsystems in different positions. However, the existing wiring harness continuity detection device still has the following problems when performing continuity detection on these wiring harnesses:

[0005] Before testing, when the wires in the wire harness are clamped and fixed, the clamping tool in the testing device cannot be adaptively adjusted according to the diameter of the wire, resulting in the clamping tool being unable to fully fit the wires of different diameters in the wire harness, thereby affecting the stability of the wire connection and affecting the test results of the wires in the wire harness;

[0006] When testing wires, the wires in the wiring harness are prone to bending or loosening, resulting in unstable contact points and the risk of poor contact. At the same time, bent or loose wiring harnesses can cause electromagnetic interference between the wires, affecting the accurate transmission of the detection signal, resulting in inaccurate wire conductivity detection results. Summary of the invention

[0007] The purpose of the present invention is to address the problems raised in the above background technology and to provide a wire harness continuity detection device that can adaptively clamp and fix wires according to their diameters, thereby improving the fixing effect of wires of different diameters in the wire harness.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A wiring harness continuity detection device, comprising:

[0010] Testing platform;

[0011] A detection mechanism, wherein the detection mechanism is provided in multiple groups and is distributed in a linear array above the detection platform, each group of the detection mechanism comprises two installation frames symmetrically arranged above the detection platform, and the two installation frames are respectively provided with test terminals connected to both ends of the wire;

[0012] An adaptive clamping mechanism, wherein the adaptive clamping mechanism is provided in multiple groups and is used in conjunction with each mounting frame respectively, and is used to adaptively clamp and fix the wire according to the diameter of the wire;

[0013] The straightening mechanism is provided with two groups and moves relative to each other, and is used to straighten the wire before detection.

[0014] Preferably, a display is provided at the upper end of the detection platform, and the test terminals inside the two installation frames are connected to the first power supply and the current sensor respectively.

[0015] Preferably, each group of the adaptive clamping mechanism includes two clamping boxes fixedly connected to the upper and lower ends of the mounting frame, a liquid storage chamber is provided inside the clamping box, an airtight sliding piston plate is provided inside the liquid storage chamber, a screw is rotatably connected to the inner wall of the liquid storage chamber, the piston plate is threadedly connected to the screw and is sealed to the screw, a micro motor for driving the screw is fixedly connected to the outer wall of the clamping box, a plurality of clamping grooves distributed in a linear array are provided on the inner bottom wall of the liquid storage chamber, a clamping plate is airtightly slidably connected in each of the clamping grooves, each of the clamping plates extends to the interior of the mounting frame, and a first spring is provided between each of the clamping plates and the top wall of the liquid storage chamber, the interior of the liquid storage chamber is filled with electrorheological fluid, and a control mechanism for controlling the rheological properties of the electrorheological fluid is also provided inside the liquid storage chamber.

[0016] Preferably, the control mechanism includes a control plate which is airtightly slidably connected to the inner wall of the liquid storage chamber, a second spring is provided between the control plate and the inner wall of the liquid storage chamber, a first conductive sheet is fixedly connected through the control plate, a second conductive sheet is provided on the inner wall of the liquid storage chamber away from the micro motor, a second power supply is provided on the outer wall of the clamping box, and power lines are connected between the first conductive sheet, the second conductive sheet and the second power supply.

[0017] Preferably, each group of the straightening mechanisms includes a moving rod that is slidably connected to the upper end of the detection platform in a horizontal direction, guide rails are provided on both sides of each of the installation frames, and the two guide rails are fixedly connected to the upper end of the detection platform through L-shaped support rods, and sliders are connected in the two guide rails in a horizontal direction, and a U-shaped plate is fixedly connected between the two sliders. The installation frame is slidably connected to the inner wall of the U-shaped plate at the corresponding position in the horizontal direction, and a third spring is provided between the installation frame and the inner wall of the U-shaped plate, and a lifting block is slidably connected to the outer wall of the U-shaped plate in a vertical direction, and an extension rod is fixedly connected to the lower end of the lifting block, and a card block is fixedly connected to the bottom of the extension rod, and a card slot used for cooperating with the card block at the corresponding position is opened on the moving rod, and a transmission mechanism is provided in the U-shaped plate for straightening wires of different lengths.

[0018] Preferably, the transmission mechanism includes two symmetrically distributed hinged rods fixedly connected to the mounting frame, the hinged rod is hingedly connected to a guide wheel at one end away from the mounting frame, two limit grooves are symmetrically provided on the side wall of the U-shaped plate, a transmission plate is slidably connected in each of the limit grooves, the portion of the transmission plate extending into the U-shaped plate is fixedly connected to a wedge-shaped transmission block, a fourth spring is provided between the wedge-shaped transmission block and the inner wall of the U-shaped plate, the guide wheel is in rolling contact with the wedge-shaped transmission block at a corresponding position, the portion of the transmission plate extending outside the U-shaped plate is provided with a first hinge seat, and two symmetrically distributed second hinge seats are provided at the lower end of the lifting block, and connecting rods are provided between the first hinge seat and the second hinge seat at the corresponding position.

[0019] Preferably, a plurality of limiting mechanisms are provided above the detection platform and are used to cooperate with the mounting frames at corresponding positions, which are used to limit the mounting frames at both ends of the wire at each position after the wire is straightened. The limiting mechanism includes a stopper plate fixedly connected to the extension rod, ratchet plates are symmetrically arranged on both sides of the U-shaped plate, two telescopic rods are provided between each ratchet plate and the upper end of the detection platform, ratchet blocks used to cooperate with the ratchet plates at corresponding positions are provided at the lower ends of the sliders on both sides of the U-shaped plate, and the two sides of the stopper plate are respectively abutted against the lower ends of the two ratchet plates, and an extension plate with the same height as the moving rod is fixedly connected to the moving rod.

[0020] Compared with the existing technology, the advantages of the wiring harness continuity detection device are:

[0021] The present invention provides an adaptive clamping mechanism. Before detection, the electrorheological fluid stored in the liquid storage cavity is transported to a plurality of clamping grooves, so that the clamping plates in the plurality of clamping grooves can be pushed into the installation frame and abut against the peripheral side walls of the wires. Subsequently, the control plate is pushed to slide in the liquid storage cavity, so that the first conductive sheet on the control plate contacts the second conductive sheet, so that the electrorheological fluid in the liquid storage cavity is converted into a low-viscosity fluid, so that the position of the clamping plate in the clamping groove cannot be changed, thereby adaptively clamping and fixing the wire according to its diameter, improving the fixing effect of wires with different diameters in the wiring harness, improving the stability of the wire connection, and avoiding affecting the conduction detection of the wires.

[0022] The present invention provides a straightening mechanism. When the two moving rods move away from each other, the clamping block is in the clamping groove of the moving rod, and thus the multiple U-shaped plates and the mounting frame on both sides are driven to move away from each other. When any one wire in the wiring harness is straightened, the U-shaped plates continue to move away from each other, which will cause the mounting frame at this position to be displaced relative to the U-shaped plates, thereby allowing the two guide wheels to roll along the two wedge-shaped transmission blocks to pull the clamping block out of the clamping groove, so that when the two moving rods continue to move away from each other, the U-shaped plate and the mounting frame at this position are no longer driven to move, thereby allowing the wire at this position to remain in a straightened state and not continue to be stretched and damaged, while longer wires at other positions are continued to be stretched, thereby achieving straightening work for wires of different lengths, avoiding bending or relaxation of the wires, improving the stability of the wire contact points, preventing electromagnetic interference between the wires, and improving the accuracy of the conduction detection results. At the same time, the straightening operation can ensure that wires of different lengths are tested in a similar physical state, thereby improving the repeatability and consistency of the test results.

[0023] The present invention provides a limiting mechanism. When the clamping block is separated from the moving rod, the ratchet block below the slider is clamped by the ratchet plate, so that during the subsequent movement of the moving rod, the slider is limited in the straightened position of the wire. The wire always maintains a straightened state, and the positions of the U-shaped plate and the installation frame are prevented from being offset due to collision with workers after the wire is straightened and separated from the moving rod, thereby ensuring the straightening effect of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the installation frame in the present invention;

[0026] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0027] Figure 4 It is a partial structural schematic diagram of the straightening mechanism in the present invention;

[0028] Figure 5 yes Figure 4 The enlarged view of point B in the middle;

[0029] Figure 6 It is a partial structural schematic diagram of the straightening mechanism in the present invention from another angle;

[0030] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0031] Figure 8 It is a partial structural schematic diagram of the limiting mechanism in the present invention.

[0032] In the figure: 1. detection platform; 2. detection mechanism; 21. installation frame; 22. test terminal; 3. adaptive clamping mechanism; 31. clamping box; 32. liquid storage chamber; 33. piston plate; 34. screw; 35. micro motor; 36. clamping groove; 37. clamping plate; 38. first spring; 4. straightening mechanism; 41. moving rod; 42. guide rail; 43. slider; 44. U-shaped plate; 45. third spring; 46. lifting block; 47. extension rod; 48. card block; 49. card slot; 5. display; 6. control mechanism; 61. control board ; 62. second spring; 63. first conductive sheet; 64. second conductive sheet; 65. power cord; 7. transmission mechanism; 71. hinged rod; 72. guide wheel; 73. limiting groove; 74. transmission plate; 75. wedge-shaped transmission block; 76. fourth spring; 77. first hinge seat; 78. second hinge seat; 79. connecting rod; 8. limiting mechanism; 81. abutment plate; 82. ratchet plate; 83. telescopic rod; 84. ratchet block; 85. extension plate; 9. driving mechanism; 91. driving rod; 92. motor; 93. driving gear; 94. rack. DETAILED DESCRIPTION

[0033] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0034] It should be noted in advance that the present invention is applicable to some complex equipment or vehicles, during which wires of different lengths need to be set to adapt to different physical spaces and connection positions to meet actual installation space and layout requirements.

[0035] Example: Refer to Figures 1 to 8 , a wiring harness continuity detection device, comprising:

[0036] Detection platform 1;

[0037] The detection mechanism 2 is provided with multiple groups and linear arrays are distributed above the detection platform 1. Each group of the detection mechanism 2 includes two installation frames 21 symmetrically arranged above the detection platform 1. The two installation frames 21 are respectively provided with test terminals 22 connected to both ends of the wire;

[0038] Specifically, a display 5 is provided at the upper end of the detection platform 1, and the test terminals 22 inside the two installation frames 21 are respectively connected to the first power supply and the current sensor. During actual detection, when the two ends of the wire are respectively connected to the test terminals 22 in the two installation frames 21, the first power supply can send current to the wire under test, and the current sensor can feed back the detected current signal to the display 5. The current signal observed by the display 5 is used to detect whether a path is formed in the wire, thereby realizing the conductivity detection of the wire.

[0039] Adaptive clamping mechanism 3, which is provided with multiple groups and respectively cooperates with each installation frame 21 to adaptively clamp and fix the wire according to the diameter of the wire;

[0040] Each group of adaptive clamping mechanisms 3 includes two clamping boxes 31 fixedly connected to the upper and lower ends of the mounting frame 21, a liquid storage chamber 32 is provided inside the clamping box 31, an airtight sliding piston plate 33 is provided inside the liquid storage chamber 32, a screw 34 is rotatably connected to the inner wall of the liquid storage chamber 32, the piston plate 33 is threadedly connected to the screw 34 and is sealed to the screw 34, a micro motor 35 for driving the screw 34 is fixedly connected to the outer wall of the clamping box 31, a plurality of clamping grooves 36 distributed in a linear array are provided on the inner bottom wall of the liquid storage chamber 32, a clamping plate 37 is airtightly slidably connected in each clamping groove 36, each clamping plate 37 extends to the interior of the mounting frame 21, and a first spring 38 is provided between each clamping plate 37 and the inner top wall of the liquid storage chamber 32, the interior of the liquid storage chamber 32 is filled with electrorheological fluid, and a control mechanism 6 for controlling the rheological properties of the electrorheological fluid is also provided inside the liquid storage chamber 32.

[0041] Specifically, when an external electric field is applied, the electrorheological fluid is in a high-viscosity fluid, and after the external electric field is removed, it is in a low-viscosity fluid. This is because when an external electric field is applied, the suspended particles in the electrorheological fluid are rapidly arranged into a chain structure under the action of the electric field, which increases the cohesion and viscosity of the fluid, causing the electrorheological fluid to appear as a high-viscosity fluid. When the electric field is removed, the suspended particles in the electrorheological fluid will redisperse, causing the electrorheological fluid to return to its original low-viscosity state.

[0042] The control mechanism 6 includes a control board 61 which is airtightly slidably connected to the inner wall of the liquid storage chamber 32, a second spring 62 is provided between the control board 61 and the inner wall of the liquid storage chamber 32, a first conductive sheet 63 is fixedly connected through the control board 61, a second conductive sheet 64 is provided on the inner wall of the liquid storage chamber 32 away from the micro motor 35, a second power supply is provided on the outer wall of the clamping box 31, and a power line 65 is connected between the first conductive sheet 63, the second conductive sheet 64 and the second power supply.

[0043] Specifically, when the first conductive sheet 63 contacts the second conductive sheet 64, a path is formed between the second power supply, the first conductive sheet 63, the second conductive sheet 64 and the two power lines 65. Since the current is formed by the flow of charged particles along the power lines 65, when the current passes through the power lines 65, the charge distribution inside the power lines 65 will be affected, resulting in an electric field around the power lines 65.

[0044] In view of the problem that the clamping tooling in the prior art cannot be adaptively adjusted according to the diameter of the wire, resulting in the clamping tooling being unable to fully fit the wires of different diameters in the wiring harness, the present invention sets an adaptive clamping mechanism 3. Before detection, the screw 34 is driven to rotate by a micro motor 35, so that the piston plate 33 is horizontally displaced along the screw 34 in the liquid storage chamber 32, and the electrorheological fluid stored in the liquid storage chamber 32 is transported to the multiple clamping grooves 36, so that the clamping plates 37 in the multiple clamping grooves 36 can be pushed into the installation frame 21 and abut against the peripheral side wall of the wire. After the multiple clamping plates 37 are unable to move, the multiple clamping plates 37 complete the clamping work of the wire, and the piston plate 33 continues to transport the electrorheological fluid. The spring force of the second spring 62 is overcome, and the control board 61 is pushed to slide in the liquid storage chamber 32, so that the first conductive sheet 63 on the control board 61 contacts the second conductive sheet 64, and a passage is formed between the second power supply, the first conductive sheet 63, the second conductive sheet 64 and the two power lines 65, so that the electrorheological fluid in the liquid storage chamber 32 is transformed from a high-viscosity fluid to a low-viscosity fluid under the action of the electric field. At this time, the electrorheological fluid cannot flow, so that the position of the clamping plate 37 in the clamping groove 36 cannot change, so that the wire is clamped and fixed adaptively according to its diameter, thereby improving the fixing effect of wires of different diameters in the wiring harness, improving the stability of the wire connection, and avoiding affecting the conduction detection of the wire.

[0045] After the detection is completed, when the wire needs to be removed, the micro motor 35 drives the screw 34 to rotate in the opposite direction, so that the piston plate 33 moves and resets in the liquid storage chamber 32. Since the elastic force of the second spring 62 is greater than the elastic force of the first spring 38, the control plate 61 will move and reset first, and the multiple clamping plates 37 will move and reset later. The elastic force of the first spring 38 makes the multiple clamping plates 37 in a horizontal setting after resetting, which is convenient for re-clamping and fixing the wire next time.

[0046] It is worth mentioning that in the process of clamping the wires, the two ends of a wire in the wiring harness are respectively placed in one of the installation frames 21 at the two side positions, and when the multiple clamping plates 37 at the two side positions in the installation frame 21 are close to each other, one end of the wire is clamped and fixed by the multiple clamping plates 37. Here, the clamping plates 37 corresponding to the two side positions cannot move after moving to be close to each other.

[0047] The straightening mechanism 4 is provided with two groups and moves relative to each other, and is used to straighten the wire before detection.

[0048] Each set of straightening mechanisms 4 includes a moving rod 41 slidably connected to the upper end of the detection platform 1 in the horizontal direction, and guide rails 42 are provided on both sides of each installation frame 21. The two guide rails 42 are fixedly connected to the upper end of the detection platform 1 through L-shaped struts. Slide blocks 43 are slidably connected in the two guide rails 42 in the horizontal direction, and a U-shaped plate 44 is fixedly connected between the two slide blocks 43. The installation frame 21 is slidably connected to the inner wall of the U-shaped plate 44 at the corresponding position in the horizontal direction. A third spring 45 is provided between the installation frame 21 and the inner wall of the U-shaped plate 44. The outer wall of the U-shaped plate 44 is slidably connected to a lifting block 46 in the vertical direction. The lower end of the lifting block 46 is fixedly connected to an extension rod 47, and the bottom of the extension rod 47 is fixedly connected to a card block 48. A card slot 49 used in conjunction with the card block 48 at the corresponding position is opened on the moving rod 41, and a transmission mechanism 7 is provided in the U-shaped plate 44 for straightening wires of different lengths.

[0049] Specifically, a driving mechanism 9 is also provided on the detection platform 1 for controlling the relative movement of the two groups of straightening mechanisms 4. The driving mechanism 9 includes a driving rod 91 rotatably connected to the upper end of the detection platform 1. A motor 92 for controlling the rotation of the driving rod 91 is provided at the bottom of the detection platform 1. A driving gear 93 is fixedly connected to the driving rod 91. Racks 94 are fixedly connected to the two moving rods 41 through fixed rods. The two racks 94 are respectively meshed with the two sides of the driving gear 93. After clamping is completed, the driving rod 91 is driven to rotate by the motor 92, and then the driving gear 93 is rotated, so that the two racks 94 move away from each other, and further drive the two moving rods 41 to move away from each other, thereby ensuring the straightening of the wires in the wiring harness.

[0050] The transmission mechanism 7 includes two symmetrically distributed hinged rods 71 ​​fixedly connected to the installation frame 21, and a guide wheel 72 is hinged at one end of the hinged rod 71 away from the installation frame 21. Two limiting grooves 73 are symmetrically provided on the side wall of the U-shaped plate 44, and a transmission plate 74 is slidably connected in each limiting groove 73. The portion of the transmission plate 74 extending into the U-shaped plate 44 is fixedly connected to a wedge-shaped transmission block 75, and a fourth spring 76 is provided between the wedge-shaped transmission block 75 and the inner wall of the U-shaped plate 44. The guide wheel 72 is in rolling contact with the wedge-shaped transmission block 75 at the corresponding position, and the portion of the transmission plate 74 extending outside the U-shaped plate 44 is provided with a first hinge seat 77. The lower end of the lifting block 46 is provided with two symmetrically distributed second hinge seats 78, and a connecting rod 79 is provided between the first hinge seat 77 and the second hinge seat 78 at the corresponding position.

[0051] In view of the problem that the wires in the wiring harness in the prior art are prone to bending or loosening, resulting in unstable contact points and the risk of poor contact, and at the same time, bent or loose wiring harnesses will cause electromagnetic interference between the wires, affecting the accurate transmission of detection signals, the present invention provides a straightening mechanism 4. When the two moving rods 41 move away from each other, since the block 48 is in the slot 49 of the moving rod 41, it will drive the multiple U-shaped plates 44 and the installation frame 21 on both sides to move away from each other. When any one of the wires in the wiring harness is straightened, the U-shaped plates 44 continue to move away from each other, which will cause the installation frame 21 in the U-shaped plate 44 at this position to be displaced relative to the U-shaped plate 44, thereby allowing the two guide wheels 72 to roll along the two wedge-shaped transmission blocks 75, with The two wedge-shaped transmission blocks 75 are moved closer to each other, further making the two transmission plates 74 closer to each other, and under the action of the first hinge seat 77, the second hinge seat 78 and the connecting rod 79, the lifting block 46 is displaced upward, and the card block 48 is pulled out of the card slot 49 through the extension rod 47, so that when the two moving rods 41 continue to move away from each other, they no longer drive the U-shaped plate 44 and the installation frame 21 at this position to move, so that the wire at this position remains in a straight state and will not continue to be stretched and damaged, while longer wires at other positions are continued to be stretched, so as to achieve the straightening work for wires of different lengths, avoid bending or relaxation of the wires, improve the stability of the wire contact points, prevent electromagnetic interference between the wires, and improve the accuracy of the conduction detection results.

[0052] In addition, regardless of the initial shape of the different wires in the harness, the straightening operation ensures that wires of different lengths are tested in a similar physical state, which improves the repeatability and consistency of the test results and avoids test errors caused by the natural bending of the wires or different placement methods.

[0053] It should be noted that an anti-slip coating is provided on the side of the clamping plate 37 close to the wire. Therefore, after the wire is stretched straight, when the mounting frame 21 is displaced relative to the U-shaped plate 44, the pulling force of the third spring 45 on the mounting frame 21 and the wire is not sufficient to overcome the friction between the clamping plate 37 and the wire, thereby ensuring that the wire will not affect the conduction detection of the wire after being stretched straight.

[0054] A plurality of limiting mechanisms 8 are provided above the detection platform 1 for use with the mounting frames 21 at the corresponding positions, and are used to limit the mounting frames 21 at both ends of the wire at each position after the wire is straightened. The limiting mechanism 8 includes a stop plate 81 fixedly connected to the extension rod 47, ratchet plates 82 are symmetrically provided on both sides of the U-shaped plate 44, two telescopic rods 83 are provided between each ratchet plate 82 and the upper end of the detection platform 1, and ratchet blocks 84 for use with the ratchet plates 82 at the corresponding positions are provided at the lower ends of the sliders 43 on both sides of the U-shaped plate 44, and the two sides of the stop plate 81 are respectively abutted against the lower ends of the two ratchet plates 82, and an extension plate 85 with the same height as the moving rod 41 is fixedly connected to the moving rod 41.

[0055] It should also be noted that the present invention provides a limiting mechanism 8. When the block 48 is disengaged from the slot 49 on the moving rod 41, the extension rod 47 will move upward, and the ratchet plates 82 on both sides of the wire at this position will be driven to move upward under the action of the abutment plate 81. The ratchet plate 82 clamps the ratchet block 84 under the slider 43. Since the height of the extension plate 85 is the same as that of the moving rod 41, the ratchet plate 82 can always limit the slider 43 in the straightening position of the wire during the subsequent movement of the moving rod 41, so that the wire always maintains a straightened state, and avoids the position of the U-shaped plate 44 and the installation frame 21 from being offset due to collision with the staff after the wire is straightened and disengaged from the moving rod 41, thereby ensuring the straightening effect of the wire.

[0056] After the detection is completed, the motor 92 drives the driving rod 91 to rotate in the opposite direction, so that the two moving rods 41 are close to each other. When the moving rod 41 moves to the block 48 and re-engages in the slot 49, the downward movement of the abutment plate 81 will cause the ratchet plate 82 at this position to automatically fall down under the action of gravity, so that the wire is no longer stretched straight, so that the moving rod 41 can be reset when passing through each U-shaped plate 44 and the mounting frame 21 during the resetting process, thereby ensuring the subsequent conduction detection of the wiring harness.

[0057] The present invention can be explained by the following operation mode:

[0058] Before testing, the two ends of the wire are respectively placed in the installation frames 21 on both sides, and the screw 34 is driven to rotate by the micro motor 35, so that the piston plate 33 is horizontally displaced along the screw 34 in the liquid storage chamber 32, and the electrorheological fluid stored in the liquid storage chamber 32 is transported to the multiple clamping grooves 36, so that the clamping plates 37 in the multiple clamping grooves 36 can be pushed into the installation frame 21 and abut against the surrounding side wall of the wire. The continued delivery of the electrorheological fluid by the piston plate 33 will overcome the elastic force of the second spring 62, and push the control plate 61 to slide in the liquid storage chamber 32, so that the first conductive sheet 63 on the control plate 61 contacts the second conductive sheet 64, so that the electrorheological fluid is converted into a low-viscosity fluid. At this time, the electrorheological fluid cannot flow, so that the position of the clamping plate 37 in the clamping groove 36 cannot change, and the wire is clamped and fixed adaptively according to its diameter;

[0059] The motor 92 is turned on to drive the two moving rods 41 to move away from each other, driving the multiple U-shaped plates 44 and the mounting frame 21 on both sides to move away from each other. When any wire in the wiring harness is straightened, the U-shaped plates 44 continue to move away from each other, which will cause the mounting frame 21 in the U-shaped plate 44 at this position to shift relative to the U-shaped plate 44, so that the two transmission plates 74 approach each other, and the clamping block 48 is pulled out of the clamping slot 49, so that when the two moving rods 41 continue to move away from each other, the U-shaped plate 44 and the mounting frame 21 at this position will no longer be driven to move, thereby achieving the straightening of wires of different lengths;

[0060] During detection, current is sent to the tested wire through the first power supply, and the current sensor feeds back the detected current signal to the display 5. The current signal observed by the display 5 is used to detect whether the wire forms a path, thereby realizing the conduction detection of the wire.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wiring harness continuity detection device, characterized in that: include: Detection platform (1); A detection mechanism (2), wherein the detection mechanism (2) is provided in a plurality of groups and is distributed in a linear array above the detection platform (1), each group of the detection mechanism (2) comprises two installation frames (21) symmetrically arranged above the detection platform (1), and the two installation frames (21) are respectively provided with test terminals (22) connected to two ends of the wire; An adaptive clamping mechanism (3), wherein the adaptive clamping mechanism (3) is provided in a plurality of groups and is respectively used in conjunction with each mounting frame (21) to adaptively clamp and fix the wire according to the diameter of the wire; Each group of the adaptive clamping mechanisms (3) comprises two clamping boxes (31) fixedly connected to the upper and lower ends of the mounting frame (21), a liquid storage chamber (32) is provided inside the clamping box (31), an airtight sliding piston plate (33) is provided inside the liquid storage chamber (32), a screw rod (34) is rotatably connected to the inner wall of the liquid storage chamber (32), the piston plate (33) is threadedly connected to the screw rod (34) and is sealed to the screw rod (34), and a micro motor (35) for driving the screw rod (34) is fixedly connected to the outer wall of the clamping box (31). ), a plurality of clamping grooves (36) distributed in a linear array are provided on the inner bottom wall of the liquid storage cavity (32), a clamping plate (37) is airtightly slidably connected to each of the clamping grooves (36), each of the clamping plates (37) extends into the interior of the mounting frame (21), and a first spring (38) is provided between each of the clamping plates (37) and the inner top wall of the liquid storage cavity (32), the interior of the liquid storage cavity (32) is filled with electrorheological fluid, and a control mechanism (6) for controlling the rheological properties of the electrorheological fluid is also provided inside the liquid storage cavity (32); A straightening mechanism (4), wherein the straightening mechanism (4) is provided with two groups and moves relative to each other, and is used to straighten the wire before testing; The control mechanism (6) comprises a control plate (61) airtightly slidably connected to the inner wall of the liquid storage chamber (32); a second spring (62) is provided between the control plate (61) and the inner wall of the liquid storage chamber (32); a first conductive sheet (63) is fixedly connected to the control plate (61); a second conductive sheet (64) is provided on the inner wall of the liquid storage chamber (32) away from the micro motor (35); a second power supply is provided on the outer wall of the clamping box (31); and power lines (65) are connected between the first conductive sheet (63), the second conductive sheet (64) and the second power supply.

2. The wire harness continuity detection device according to claim 1, characterized in that: A display (5) is provided at the upper end of the detection platform (1), and the test terminals (22) inside the two installation frames (21) are connected to the first power supply and the current sensor respectively.

3. The wire harness continuity detection device according to claim 2, characterized in that: Each group of the straightening mechanisms (4) comprises a moving rod (41) slidably connected to the upper end of the detection platform (1) in a horizontal direction, and guide rails (42) are provided at both sides of each of the installation frames (21). The two guide rails (42) are fixedly connected to the upper end of the detection platform (1) via L-shaped support rods, and sliders (43) are slidably connected in the two guide rails (42) in a horizontal direction. A U-shaped plate (44) is fixedly connected between the two sliders (43), and the installation frame (21) is slidably connected to the inner wall of the U-shaped plate (44) at the corresponding position in the horizontal direction. A third spring (45) is provided between the mounting frame (21) and the inner wall of the U-shaped plate (44); the outer wall of the U-shaped plate (44) is slidably connected to a lifting block (46) in the vertical direction; the lower end of the lifting block (46) is fixedly connected to an extension rod (47); the bottom of the extension rod (47) is fixedly connected to a clamping block (48); a clamping groove (49) for use with the clamping block (48) at a corresponding position is provided on the moving rod (41); a transmission mechanism (7) is provided inside the U-shaped plate (44) for straightening wires of different lengths.

4. The wire harness continuity detection device according to claim 3, characterized in that: The transmission mechanism (7) comprises two symmetrically distributed hinged rods (71) fixedly connected to the mounting frame (21); one end of the hinged rod (71) away from the mounting frame (21) is hingedly connected to a guide wheel (72); two limiting grooves (73) are symmetrically provided on the side wall of the U-shaped plate (44); a transmission plate (74) is slidably connected in each of the limiting grooves (73); a portion of the transmission plate (74) extending into the U-shaped plate (44) is fixedly connected to a wedge-shaped transmission block (75); A fourth spring (76) is provided between the wedge-shaped transmission block (75) and the inner wall of the U-shaped plate (44); the guide wheel (72) is in rolling contact with the wedge-shaped transmission block (75) at a corresponding position; a portion of the transmission plate (74) extending outside the U-shaped plate (44) is provided with a first hinge seat (77); two symmetrically distributed second hinge seats (78) are provided at the lower end of the lifting block (46); and a connecting rod (79) is provided between the first hinge seat (77) and the second hinge seat (78) at the corresponding position.

5. The wire harness continuity detection device according to claim 3, characterized in that: A plurality of limiting mechanisms (8) for use with the mounting frames (21) at corresponding positions are provided above the detection platform (1), and are used to limit the mounting frames (21) at both ends of the wire at each position after the wire is straightened. The limiting mechanism (8) comprises a stop plate (81) fixedly connected to the extension rod (47). Ratchet plates (82) are symmetrically arranged at both sides of the U-shaped plate (44). Two telescopic rods (83) are arranged between each ratchet plate (82) and the upper end of the detection platform (1). Ratchet blocks (84) for use with the ratchet plates (82) at corresponding positions are arranged at the lower ends of the sliders (43) at both sides of the U-shaped plate (44). Both sides of the stop plate (81) are respectively abutted against the lower ends of the two ratchet plates (82). An extension plate (85) having the same height as the moving rod (41) is fixedly connected to the moving rod (41).

6. The wire harness continuity detection device according to claim 3, characterized in that: The detection platform (1) is also provided with a driving mechanism (9) for controlling the two sets of straightening mechanisms (4) to move relative to each other. The driving mechanism (9) comprises a driving rod (91) rotatably connected to the upper end of the detection platform (1). A motor (92) for controlling the rotation of the driving rod (91) is provided below the detection platform (1). A driving gear (93) is fixedly connected to the driving rod (91). Racks (94) are fixedly connected to the two moving rods (41) via fixed rods. The two racks (94) are respectively meshed with two sides of the driving gear (93).

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