Pin detection equipment for automotive wiring harness plugs and recording system of its measured values

Abstract

The present invention provides a pin detection device for automobile wiring harness plug and a system for recording the measured value thereof. The pin detection device comprises: a plug fixture, a test bench and a touch screen, a start button, a slide table and a test fixture arranged on the test bench. A limit slot is provided on the plug fixture, and the slide table is used to drive the test fixture to approach or move away from the plug fixture; the test fixture comprises a base, a contour socket, a pressure detection plate and a plurality of floating rods located in the contour socket, the base is connected to the slide table, a trigger ring is provided on the floating rod, and a varistor matching the trigger ring is provided on the pressure detection plate; a blind hole is provided at the end of the floating rod. The number of floating rods in the contour socket is consistent with the pins to be tested in the wiring harness plug. During the detection, the floating rods are in one-to-one contact with the pins, and then the floating rods trigger the corresponding varistor on the pressure detection plate to accurately detect the tightness of each pin; during the test, the pins extend into the blind holes, and the blind holes provide limit, which can prevent the pins from being pressed crooked.

Description

Technical Field

[0001] The invention relates to a pin detection device for an automobile wiring harness plug, in particular to a pin detection device for an automobile wiring harness plug. Background Art

[0002] Figure 1 It is a wiring harness plug 20 for an automobile, which includes a plug body 21 and a plurality of pins 22 located inside the plug body 21 and connected to the wires. After the pins 22 are installed into the plug body 21, not only the electrical performance thereof needs to be tested, but also whether the connection between the pins 22 and the socket body 21 is firm needs to be tested. The specific testing method is to fix the wiring harness plug 20, apply force to the pins 22, and determine whether the pins 22 are loose, so as to ensure the delivery quality of the automobile wiring harness plug 20.

[0003] However, the pin 22 itself is a slender member with weak bending resistance. When the test device applies too much force, it is easy to bend the pin 22. If the force during the test is reduced, it is impossible to accurately test the weak pin 22. Therefore, how to ensure the accuracy of the pin test and avoid bending the pin during the test is a problem that needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a pin detection device for an automobile wiring harness plug, which can ensure the accuracy of the pin test and avoid bending the pins during the test, thereby improving the delivery quality of the automobile wiring harness plug.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A pin detection device for automobile wiring harness plugs, comprising: a plug fixture, a test bench, and a touch screen, a start button, a slide table, and a test fixture arranged on the test bench;

[0007] The plug fixture is provided with a limiting groove, and the slide is used to drive the test fixture to approach or move away from the plug fixture;

[0008] The test fixture comprises a base, a contour socket, a pressure detection plate and a plurality of floating rods located in the contour socket, the base is connected to the slide, a trigger ring is provided on the tail of the floating rod, and a varistor matching the trigger ring is provided on the pressure detection plate;

[0009] Wherein, a blind hole is opened at the end of the floating rod.

[0010] In one embodiment, there are two start buttons, and the two start buttons are respectively located on two sides of the test fixture.

[0011] In one of the embodiments, a buzzer is provided on the test bench.

[0012] In one of the embodiments, an emergency stop button is provided on the test bench.

[0013] In one of the embodiments, the plug clamp is provided with an anti-deviation rod, and the base is provided with a limiting hole matching the anti-deviation rod.

[0014] In one embodiment, the diameter of the blind hole is larger than the diameter of the pin to be tested.

[0015] In one embodiment, there are two pressure detection plates, the two pressure detection plates are arranged opposite to each other, a through hole is opened on the pressure detection plate, the floating rod passes through the through hole, and the trigger ring is located between the two pressure detection plates.

[0016] In one embodiment, the test fixture further includes an end cover, a coil, a magnetic ring and a plurality of steel balls, wherein the end cover is arranged on the contoured socket, a guide hole is provided on the end cover, a conical contact portion is provided on the end of the floating rod facing the guide hole, a plurality of spherical pits connected to the blind hole are opened on the conical contact portion, each of the spherical pits accommodates one of the steel balls, the steel ball partially extends into the blind hole, and the portion of the steel ball exposed outside the spherical pit is in contact with the hole wall of the guide hole; the coil is arranged in the contoured socket, the floating rod passes through the coil, the magnetic ring is arranged on the conical contact portion, and the coil is conductive to push the magnetic ring closer to or away from the end cover.

[0017] In one embodiment, a gap is provided between the guide hole and the conical contact portion, and a spacing is provided between the magnetic ring and the coil.

[0018] A measurement value recording system, comprising the above-mentioned pin detection device for automobile wiring harness plug, and also comprising a laser marking device;

[0019] The laser marking device is used to receive the detection data of the test bench, and mark and record the detection data in the form of a QR code on the wiring harness plug.

[0020] The above-mentioned pin detection equipment for automobile wiring harness plug has the following advantages:

[0021] 1. The number of floating rods in the contour socket is consistent with the pins to be tested in the wiring harness plug. During the test, the floating rods are in one-to-one contact with the pins, and then the floating rods trigger the corresponding varistor on the pressure detection board to accurately detect the tightness of each pin;

[0022] 2. During the test, the pins are inserted into the blind holes, which provide limit stops to prevent the pins from being twisted. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural diagram of the wiring harness plug;

[0025] Figure 2 It is a structural schematic diagram of a pin detection device for automobile wiring harness plug;

[0026] Figure 3 A partial cross-sectional view of a pin detection device for an automotive wiring harness plug;

[0027] Figure 4 This is a schematic diagram of the matching between the plug fixture and the test fixture;

[0028] Figure 5 This is a schematic diagram of the test fixture split;

[0029] Figure 6 It is a schematic diagram of the internal structure of the contour socket;

[0030] Figure 7 It is a schematic diagram of the cooperation between the floating rod and the steel ball;

[0031] Figure 8 Figure 1 is the coordination diagram of the floating rod and the pin;

[0032] Fig. 9 Figure 2 shows the coordination between the floating rod and the pin. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0036] See also Figure 2 and Figure 3 The present invention provides a pin detection device 10 for an automobile wiring harness plug, comprising: a plug fixture 100, a test bench 200, a touch screen 300, a start button 400, a slide table 500, and a test fixture 600 arranged on the test bench 200.

[0037] See also Figure 3 and Figure 4 A limiting groove 110 is provided on the plug fixture 100 , and the slide 500 is used to drive the test fixture 600 to approach or move away from the plug fixture 100 .

[0038] See also Figure 4 and Figure 5 The test fixture 600 includes a base 610, a contour socket 620, a pressure detection plate 630 and a plurality of floating rods 640 located in the contour socket 620. The base 610 is connected to the slide 500. A trigger ring 650 is provided on the tail of the floating rod 640. A varistor 631 matching the trigger ring 650 is provided on the pressure detection plate 630.

[0039] See also Figure 6 , wherein a blind hole 641 is formed at the end of the floating rod 640 , and preferably, the diameter of the blind hole 641 is larger than the diameter of the pin 22 to be tested. The pin 22 is inserted into the blind hole 641 during testing.

[0040] When testing the harness plug 20, it is clamped on the plug fixture 100, and the limit groove 110 is used to position the plug body 21 so that the side of the harness plug 20 with the pin 22 faces the test fixture 600. After the operator presses the start button 400, the slide 500 pushes the base 610 close to the plug fixture 100, so that the contour socket 620 is inserted into the harness plug 20. At this time, the pin 22 extends into the floating rod 640 and abuts against the bottom of the blind hole 641, and then pushes the floating rod 640, so that the trigger ring 650 on the floating rod 640 squeezes the varistor 631. The value of the pressure on the pin 22 at this time is measured by the varistor 631, and it is judged whether the pin 22 is loose.

[0041] Specifically, if pin 22 is loose, the force applied when the contour socket 620 is inserted into the wiring harness plug 20 will cause pin 22 to slide, and the reaction force received by the floating rod 640 matching the pin 22 will be much smaller than the normal value or even not received any force, and there is a one-to-one correspondence between the varistor 631 and the pin 22. In this way, the test bench 200 can determine the specific position of the problematic pin 22 based on the pressure value measured by the varistor 631, so as to facilitate the subsequent rework operation.

[0042] It should be emphasized that during the detection process, pin 22 is docked with floating rod 640 and pin 22 is inserted into blind hole 641, that is, during the process of applying force to pin 22, pin 22 is in a wrapped state throughout the process. Pin 22 is limited by blind hole 641 to prevent pin 22 from being bent during the detection process.

[0043] See also Figure 2 In one embodiment, two start buttons 400 are provided, and the two start buttons 400 are respectively located on both sides of the test fixture 600. The operator must press the two start buttons 400 at the same time to start the test fixture 600, ensuring that the operator's hands are away from the test fixture 600 during the operation of the equipment, so as to avoid harm to the operator during the detection process.

[0044] See also Figure 2 Preferably, a buzzer 210 is provided on the test bench 200. When the pin 22 on the harness plug 20 is abnormal, the buzzer 210 sounds long. When the detection is qualified, the buzzer 210 sounds intermittently, and the operator is notified of the detection status of the harness plug 20 by sound. Preferably, an emergency stop button 220 is provided on the test bench 200.

[0045] See also Figure 3 and Figure 4 In one embodiment, the plug fixture 100 is provided with an anti-drift rod 120, and the base 610 is provided with a limiting hole 611 matching the anti-drift rod 120. The anti-drift rod 120 and the limiting hole 611 cooperate to provide guidance for the sliding of the base 610, so that the base 610 runs more smoothly and reduces the shaking during the detection process.

[0046] It should be noted that the above-mentioned process of testing the firmness of the pin 22 actually simulates the process of docking the wiring harness plug 20 with the socket on the car when it is used. The purpose is to ensure that each pin 22 can be docked with the terminal in the socket when the wiring harness plug 20 is inserted into the socket. During the docking process, the pin 22 mainly bears pressure. After the docking is completed, the terminal in the socket and the pin 22 are engaged, so that the wiring harness plug 20 is electrically connected to the socket; it can be understood that when the car is inspected and troubleshooted, especially when the accessories need to be replaced, the plugging and unplugging process of the wiring harness plug 20 will be designed. Unlike the above-mentioned detection process of the pin 22, the pin 22 is subjected to tension during the process of unplugging the wiring harness plug 20, while the existing equipment only performs pressure testing on the wiring harness plug 20, and does not exclude the pin 22 with weak tensile strength. In other words, in the scenario where the wiring harness plug 20 needs to be unplugged, there is a risk of the pin 22 falling off. Therefore, in view of the detection problem of the pin 22, the following improvements are made to the test fixture 600:

[0047] See also Figure 5 , there are two pressure detection plates 630, the two pressure detection plates 630 are arranged opposite to each other, a through hole 632 is opened on the pressure detection plate 630, the floating rod 640 passes through the through hole 632, and the trigger ring 650 is located between the two pressure detection plates 630. When the floating rod 640 is pressurized, the trigger ring 650 squeezes the pressure detection plate 630 on the side away from the end cover 660 (such as Fig. 9 On the contrary, when the floating rod 640 is subjected to tension, the trigger ring 650 squeezes the pressure detection plate 630 near the end cap 660 (as shown in FIG. Figure 8 As shown), the two pressure detection plates 630 are used to detect the pressure and tension exerted on the pin 22 respectively.

[0048] See also Figure 5 , Figure 6 and Figure 7 The test fixture 600 further includes an end cap 660, a coil 670, a magnetic ring 680 and a plurality of steel balls 690. The end cap 660 is disposed on the contoured socket 620. A guide hole 661 is disposed on the end cap 660. A conical contact portion 642 is disposed on one end of the floating rod 640 facing the guide hole 661. A gap is disposed between the guide hole 661 and the conical contact portion 642. The conical contact portion 642 is provided with a plurality of spherical pits 643 connected to the blind hole 641. The plurality of spherical pits 643 are distributed in a circular array with the blind hole 641 as the center. Each spherical pit 643 contains a steel ball 690. The steel ball 690 partially extends into the blind hole 641. The portion of the steel ball 690 exposed outside the spherical pit 643 fits the hole wall of the guide hole 661.

[0049] When the floating rod 640 moves toward the side where the end cover 660 is located, the gap between the conical contact portion 642 and the guide hole 661 becomes smaller, and the hole wall of the guide hole 661 squeezes the steel ball 690 toward the center of the blind hole 641, thereby holding the pin 22 in the blind hole 641; when the floating rod 640 moves away from the side where the end cover 660 is located, the gap between the conical contact portion 642 and the guide hole 661 becomes larger, causing the steel ball 690 to loosen the pin 22.

[0050] See also Figure 5 , Figure 6 and Figure 7 The coil 670 is disposed in the contoured socket 620, the floating rod 640 passes through the coil 670, and the magnetic ring 680 is disposed on the conical contact portion 642. A gap is provided between the magnetic ring 680 and the coil 670. The coil 670 can generate a magnetic field when it is energized, and changing the direction of the current in the coil 670 can change the direction of the magnetic field force to attract or repel the magnetic ring 680, thereby driving the floating rod 640 to perform a short-distance telescopic movement.

[0051] The principle of testing the tensile strength of pin 22 is as follows:

[0052] See also Fig. 9 First, the pressure performance of the pin 22 is tested, and it is clamped on the plug fixture 100. The plug body 21 is positioned by the limiting groove 110 so that the side of the wiring harness plug 20 with the pin 22 faces the test fixture 600. After the start button 400 is pressed, the slide 500 pushes the base 610 close to the plug fixture 100, so that the contour socket 620 is inserted into the wiring harness plug 20. The thrust generated when the pin 22 enters the blind hole 641 drives the floating rod 640 to move in the direction away from the end cover 660, so that the trigger ring 650 is pressed on the pressure detection plate 630 on the side away from the contour socket 620. In this process, the gap between the conical contact portion 642 and the guide hole 661 becomes larger, and the steel ball 690 is squeezed by the pin 22 to the gap between the conical contact portion 642 and the guide hole 661 until the pin 22 is against the bottom of the blind hole 641, thereby pushing the floating rod 640, so that the trigger ring 650 on the floating rod 640 squeezes the varistor 631, and the value of the pressure on the pin 22 at this time is measured by the varistor 631, and it is judged whether the pin 22 is loose.

[0053] See also Figure 8 After the pressure performance test of pin 22 is completed, coil 670 is energized, and the magnetic field generated by coil 670 pushes magnetic ring 680, causing floating rod 640 to move toward the side where end cover 660 is located. Since the conical contact portion 642 is close to the guide hole 661, the gap between the two becomes smaller, and the steel ball 690 is squeezed toward the blind hole 641, allowing the steel ball 690 to hold pin 22.

[0054] Next, the slide 500 drives the base 610 away from the plug fixture 100, driving the contoured socket 620 to move away from the wiring harness plug 20, and causing the pin 22 to move away from the blind hole 641. Since the pin 22 is held by the steel ball 690 at this time, the movement of the pin 22 away from the blind hole 641 will drive the floating rod 640 to move toward the side where the end cover 660 is located, until the trigger ring 650 is pressed on the pressure detection plate 630 close to the side of the end cover 660. At this time, the gap between the tapered contact portion 642 and the guide hole 661 is further reduced, causing the steel ball 690 to hold the pin 22 tightly. At this time, tension is generated at the pin 22, and the pressure detection plate 630 close to the side of the end cover 660 detects the tension borne by the pin 22 at this time.

[0055] If the pin 22 under tension is loose, the pin 22 cannot drag the floating rod 640 toward the end cover 660, that is, the steel ball 690 cannot hold the pin 22 tightly, and the tension value measured by the varistor 631 corresponding to the pin 22 will be significantly smaller than other normal pins 22, or even zero.

[0056] After completing the tensile performance test, the slide 500 is extended again to make the contoured socket 620 close to the plug fixture 100, and the tensile force applied to the pin 22 is released. At this time, the floating rod 640 is close to the pin 22, and the steel ball 690 no longer holds the pin 22 tightly.

[0057] The direction of the current in the coil 670 is changed, and the coil 670 is allowed to absorb the magnetic ring 680, so that the floating rod 640 moves away from the end cover 660. Since the conical contact portion 642 is away from the guide hole 661, the gap between the two becomes larger, and the steel ball 690 releases the pin 22. At this time, the slide 500 retracts, and the contoured socket 620 is pulled out of the wiring harness plug 20, and the detection is completed.

[0058] It can be seen from the above detection process that the optimized test fixture 600 can not only detect the compressive resistance of the pin 22, but also perform a tensile test on it, which can effectively simulate the stress conditions of the pin 22 on the wiring harness plug 20 during actual use, and prevent the wiring harness plug 20 with loose problems from entering the market.

[0059] It should be emphasized that during the compression test and tensile test of pin 22, pin 22 is located in blind hole 641. Blind hole 641 provides protection for pin 22 to prevent pin 22 from bending due to stress, thereby solving the problem of pin 22 being defective during the test process.

[0060] In summary, the pin detection device 10 for automobile wiring harness plug has the following advantages:

[0061] 1. The number of floating rods 640 in the contoured socket 620 is consistent with the pins to be tested in the wiring harness plug. During the test, the floating rods 640 are in one-to-one contact with the pins 22, and then the floating rods 640 trigger the corresponding varistor 631 on the pressure detection plate 630 to accurately detect the tightness of each pin, and the specific position of the pin 22 with a loose problem can be detected.

[0062] 2. During the testing process, the pin 22 is located in the blind hole 641 throughout the whole process, and the blind hole 641 provides a limit to prevent the pin 22 from bending due to force problems during the testing process, thereby avoiding damage to the pin 22 during the testing process.

[0063] 3. Change the direction of the current in the coil 670 so that the steel ball 690 and the floating rod 640 cooperate to hold the pin 22 tightly, creating conditions for the tensile performance test of the pin 22, so that the testing equipment can test the compressive capacity of the pin 22 and the tensile capacity of the pin 22.

[0064] The present invention also discloses a measurement value recording system, comprising the above-mentioned pin detection device 10 for automobile wiring harness plug, and also comprising a laser marking device 30 (such as Figure 2 As shown); the laser marking device 30 is used to receive the detection data of the test bench 200, and mark and record the detection data in the form of a two-dimensional code on the wiring harness plug 20.

[0065] The pin detection device 10 used for the automotive wiring harness plug can detect the pin 22 with a loose problem in the wiring harness plug 20, and the floating rod 640 in the contoured socket 620 is in one-to-one contact with the pin 22, so the specific position of the pin 22 with the problem can be measured. The pin 22 is distributed in an array in the plug body 21, so the distribution position of the defective pin 22 can be converted into corresponding coordinate information, for example, (1, 2) corresponds to the pin 22 in the first row and the second column on the plug body 21.

[0066] When the laser marking device 30 prints the QR code on the wiring harness plug 20, the test bench 200 records the product batch number corresponding to the QR code and the coordinate information of the defective pin 22. The product batch number can be used to determine whether it is a defective product, and the coordinate information on it can be used to determine the specific location of the defective pin 22, so that the pin 22 at the corresponding position can be quickly replaced or reinstalled, which is conducive to improving rework efficiency.

[0067] It should be noted that the reworked harness plug 20 needs to be re-placed in the pin detection device for re-testing. If the rework is qualified, the information corresponding to the QR code on the harness plug 20 is modified in the test bench 200 to mark it as a qualified product; if there are still problems after rework, the information corresponding to the QR code on the harness plug 20 is also modified in the test bench 200, and the coordinate information of the pins 22 that still have problems after rework is recorded, that is, the laser marking device 30 does not need to be started when re-testing after rework, and only the information corresponding to the QR code on the target harness plug 20 needs to be modified in the test bench 200. The test bench 200 and the laser marking device 30 cooperate to record the detection data of each harness plug 20, so that the production process of the harness plug 20 can be traced and the production quality of the product is guaranteed.

[0068] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A pin detection device for automobile wiring harness plug, characterized in that: include: Plug fixture, test bench and touch screen, start button, slide table and test fixture arranged on the test bench; The plug fixture is provided with a limiting groove, and the slide is used to drive the test fixture to approach or move away from the plug fixture; The test fixture comprises a base, a contour socket, a pressure detection plate and a plurality of floating rods located in the contour socket, the base is connected to the slide, a trigger ring is provided on the tail of the floating rod, and a varistor matching the trigger ring is provided on the pressure detection plate; Wherein, a blind hole is provided at the end of the floating rod; During detection, the contoured socket is inserted into the wiring harness plug, and the pins on the wiring harness plug abut against the bottom of the blind hole, thereby pushing the floating rod, causing the trigger ring to squeeze the varistor, and the varistor measures the pressure value borne by the pins at this time.

2. The pin detection device for automobile wiring harness plug according to claim 1, characterized in that: There are two start buttons, and the two start buttons are respectively located on both sides of the test fixture.

3. The pin detection device for automobile wiring harness plug according to claim 1, characterized in that: The test bench is provided with a buzzer.

4. The pin detection device for automobile wiring harness plug according to claim 1, characterized in that: The test bench is provided with an emergency stop button.

5. The pin detection device for automobile wiring harness plug according to claim 1, characterized in that: The plug fixture is provided with an anti-deviation rod, and the base is provided with a limiting hole matching the anti-deviation rod.

6. The pin detection device for automobile wiring harness plug according to claim 1, characterized in that: The diameter of the blind hole is larger than the diameter of the pin to be tested.

7. The pin detection device for automobile wiring harness plug according to claim 1, characterized in that: There are two pressure detection plates, which are arranged opposite to each other. A through hole is opened on the pressure detection plate, and the floating rod passes through the through hole. The trigger ring is located between the two pressure detection plates.

8. The pin detection device for automobile wiring harness plug according to claim 7, characterized in that: The test fixture further includes an end cover, a coil, a magnetic ring and a plurality of steel balls. The end cover is arranged on the contoured socket, a guide hole is arranged on the end cover, a conical contact portion is arranged on one end of the floating rod facing the guide hole, a plurality of spherical pits connected to the blind hole are opened on the conical contact portion, each of the spherical pits accommodates one of the steel balls, a portion of the steel ball extends into the blind hole, and a portion of the steel ball exposed outside the spherical pit is in contact with the hole wall of the guide hole; The coil is arranged in the contoured socket, the floating rod passes through the coil, the magnetic ring is arranged on the conical contact portion, and the coil is conductive to push the magnetic ring to approach or move away from the end cover.

9. The pin detection device for automobile wiring harness plug according to claim 8, characterized in that: A gap is provided between the guide hole and the tapered contact portion, and a spacing is provided between the magnetic ring and the coil.

10. A system for recording measured values, characterized in that: A pin detection device for an automobile wiring harness plug according to any one of claims 1 to 9, further comprising a laser marking device; The laser marking device is used to receive the detection data of the test bench, and mark and record the detection data in the form of a QR code on the wiring harness plug.

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