Wire harness airtightness testing device

Abstract

The utility model relates to a wire harness airtightness testing device which comprises an inflation assembly, a positioning assembly, an air valve and an air pressure sensor. The inflation assembly comprises a locking cylinder, a first test interface and an air inlet channel connected with the locking cylinder and the first test interface; the positioning assembly comprises a slide rail, a second test interface slidably arranged on the slide rail, and a second positioning groove arranged on one side of the slide rail; the air valve is arranged at one end of the air inlet channel and used for controlling on-off of air in the air inlet channel; the air pressure sensor is arranged in the first test interface; the joint of the first end of the wire harness to be tested is connected with the first test interface; the joint of the second end of the to-be-tested wire harness is connected with the second test interface; and the air inlet channel is connected with the inflation port on the first end joint of the wire harness to be tested through the first test interface. The device can accurately position the wire harness to be measured, meets the length requirements of different wire harnesses to be measured, and simply, quickly and accurately measures the air tightness of the wire harness to be measured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to test device technical field, especially, relate to a wire harness airtightness testing arrangement. BACKGROUND

[0002] In all kinds of wire harness production, especially in the production process of automobile wire harness, waterproof performance detection is an important link to ensure product quality. At present, the commonly used waterproof detection often uses water immersion test, and this method meets the test standard of IP67 and IP68 waterproof level. Taking IP67 as an example, the product is required to be soaked in 1 meter deep water for 30 minutes, and no water leakage phenomenon is qualified. However, this detection process is time-consuming, and drying and other processes are required after detection, and the drying time is also long, more importantly, the repeatability and stability are poor, and water immersion test involves the combination of water and electricity, which has safety hazards.

[0003] Therefore, how to provide an airtightness detection device, which can accurately position the wire harness to be tested, adapt to the length requirements of different wire harnesses to be tested, and simply, quickly and accurately measure the airtightness of the wire harness to be tested, is a technical problem to be solved in the field. UTILITY MODEL CONTENT

[0004] To solve at least one of the above technical problems, the utility model provides a wire harness airtightness testing arrangement, which comprises: an inflation assembly, a positioning assembly, a gas valve and a gas pressure sensor.

[0005] The inflation assembly comprises a locking cylinder, a first test interface and an air inlet channel connected with the locking cylinder and the first test interface.

[0006] The positioning assembly comprises a slide rail, a second test interface slidably arranged on the slide rail and a second positioning groove arranged on one side of the slide rail.

[0007] The gas valve is arranged at one end of the air inlet channel and is used to control the on-off of the gas in the air inlet channel.

[0008] The gas pressure sensor is arranged in the first test interface.

[0009] The connector at the first end of the wire harness to be tested is connected with the first test interface, and the connector at the second end of the wire harness to be tested is connected with the second test interface.

[0010] The air inlet channel is connected with the inflation port on the connector at the first end of the wire harness to be tested through the first test interface.

[0011] Further, the wire harness airtightness testing arrangement further comprises a mounting plate, and the bottom of the inflation assembly and / or the bottom of the positioning assembly is provided with a suction cup.

[0012] The inflation assembly and the positioning assembly are movably arranged on the mounting plate through the suction cup at the bottom.

[0013] Further, the wire harness air tightness testing device further comprises a double-hand switch arranged on one side of the mounting plate;

[0014] The first end of the double-hand switch is connected with the air valve, and the second end of the double-hand switch is connected with the first testing interface and the air inlet channel.

[0015] Further, the front side of the first testing interface is conical.

[0016] The middle part of the first testing interface is provided with a sealing area, and the sealing area is provided with a sealing ring.

[0017] Further, the sealing area comprises a first sealing groove, a second sealing groove, a first sealing ring arranged in the first sealing groove, and a second sealing ring arranged in the second sealing groove.

[0018] The first sealing groove is arranged on the upper side of the testing interface.

[0019] The second sealing groove is arranged on the lower side of the testing interface.

[0020] The first sealing groove and the second sealing groove are coaxially arranged.

[0021] Further, the depth of the first sealing groove is greater than the depth of the second sealing groove, and the hardness of the first sealing ring is greater than the hardness of the second sealing ring.

[0022] Further, an exhaust hole is arranged between the first sealing groove and the second sealing groove.

[0023] Further, the width of the first sealing groove or / and the second sealing groove is less than the width of the groove bottom.

[0024] Further, the air charging assembly further comprises a first positioning groove arranged at the front end of the locking cylinder.

[0025] The width of the first positioning groove is greater than or equal to the diameter width of the wire harness to be tested, but is less than the connector width of the first end of the wire harness to be tested.

[0026] Further, the positioning assembly further comprises a push rod arranged on one side of the testing interface and a cross positioning groove arranged on both sides of the second positioning groove.

[0027] In this embodiment, a wire harness air tightness testing device is given for testing the air tightness inside the wire harness; in use, the operator connects the first end of the wire harness to be tested to the first testing interface; then, the gas valve is opened, and the test gas enters the wire harness to be tested through the gas inlet channel and the gas inlet of the wire harness to be tested; at the same time, the gas enters the locking cylinder to tightly push the one end of the wire harness to be tested into the first testing interface; the operator inserts the connector at the second end of the wire harness to be tested into the second positioning groove; the second testing interface on the slide rail is pushed to connect the second end of the wire harness to be tested to the second testing interface; according to the length of the wire harness to be tested, the position of the second testing interface on the slide rail is adjusted to avoid bending or twisting of the wire harness to be tested; then, the gas pressure sensor on the first testing interface monitors the gas pressure change inside the wire harness to be tested in real time; if the gas pressure change is within the standard gas pressure change range within the preset gas pressure detection time, the air tightness of the wire harness to be tested is qualified; if the gas pressure change is not within the standard gas pressure change range within the preset time, the air tightness of the wire harness to be tested is unqualified; the operator can timely, quickly and accurately determine whether there is an air tightness problem in the wire harness to be tested during the testing process. After the wire harness air tightness test is completed, the wire harness to be tested can be taken out by reversing the operation. It is worth noting that the number of positioning assemblies and inflation assemblies can be arbitrarily set according to the number of connectors of the wire harness to be tested to meet the testing requirements of the wire harness to be tested with multiple wire harness branches, further improving the application range of the wire harness air tightness testing device. In summary, the wire harness air tightness testing device can accurately position the wire harness to be tested, adapt to the length requirements of different wire harnesses to be tested, and simply, quickly and accurately measure the air tightness of the wire harness to be tested. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following briefly introduces the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on the drawings shown. The same components in the drawings use the same reference numerals. The drawings are not drawn according to the actual proportion.

[0029] Figure 1 is a schematic view of an embodiment of a wire harness air tightness testing device of the present application;

[0030] Figure 2 is a sectional view of an embodiment of a first testing interface of a wire harness air tightness testing device of the present application;

[0031] Figure 3 is a schematic view of an embodiment of a positioning assembly of a wire harness air tightness testing device of the present application. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or a middle element can be present at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or a middle element can be present at the same time.

[0034] It should also be noted that if the embodiments of the utility model involve directional indications, such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly. In addition, if the embodiments of the utility model involve descriptions such as "first, second", "S1, S2", "step one, step two", etc., such descriptions are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or the number of indicated technical features or indicating the execution order of the method, etc. Those skilled in the art can understand that any change within the technical concept of the utility model without deviating from the utility model points should be included in the protection scope of the utility model.

[0035] The utility model provides a kind of wire harness airtight test device, reference Figure 1 、 Figure 2 And Figure 3 , comprising: inflation assembly 1, positioning assembly 2, gas valve 3 and air pressure sensor 4;

[0036] Inflation assembly 1, comprising: locking cylinder 11, first test interface 12, and with locking cylinder 11 and first test interface 12 connection air inlet channel 13;

[0037] Positioning assembly 2, comprising: slide rail 21, the second test interface 22 of slidable setting on slide rail 21, and the second positioning groove 23 of setting in the side of slide rail 21;

[0038] Gas valve 3 is set in air inlet channel 13 one end, for controlling the on-off of gas in air inlet channel 13;

[0039] Air pressure sensor 4 is set in first test interface 12;

[0040] The connector of the first end of the wire harness to be tested is connected with the first test interface 12, and the connector of the second end of the wire harness to be tested is connected with the second test interface 22; and the air inlet channel 13 is connected with the air inlet on the connector of the first end of the wire harness to be tested through the first test interface 12.

[0041] In this embodiment, a wire harness air tightness testing device is provided for testing the air tightness of the wire harness. In use, an operator inserts the first end of the wire harness to be tested into the first test interface, then opens the air valve to allow the test gas to enter the wire harness to be tested through the air inlet channel and the air inlet of the wire harness to be tested, and at the same time, the gas enters the locking cylinder to tightly push the first end of the wire harness to be tested into the first test interface. The operator inserts the connector of the second end of the wire harness to be tested into the second positioning groove, and pushes the second test interface on the slide rail to insert the connector of the second end of the wire harness to be tested into the second test interface. According to the length of the wire harness to be tested, the position of the second test interface on the slide rail is adjusted to adapt to wire harnesses to be tested of different lengths, so as to avoid the wire harness to be tested from being bent or twisted. Then, the gas pressure sensor on the first test interface monitors the change of the gas pressure in the wire harness to be tested in real time. If the change of the gas pressure is within the standard gas pressure change range within the preset gas pressure detection time, the air tightness of the wire harness to be tested is qualified. If the change of the gas pressure is not within the standard gas pressure change range within the preset time, the air tightness of the wire harness to be tested is unqualified. The operator can timely, quickly and accurately determine whether there is an air tightness problem in the wire harness to be tested during the testing process. For example, the preset gas pressure value is 20 KPa, the preset gas pressure detection time is 10 s, and the standard gas pressure change range is -1.5 KPa to 0.5 KPa. After the air source supplies the air to the wire harness to be tested to reach 20 KPa, if the gas pressure in the wire harness to be tested measured by the gas pressure sensor is within 18.5 KPa to 20.5 KPa within the 10 s gas pressure detection time, the air tightness of the wire harness to be tested is qualified. If the gas pressure in the wire harness to be tested measured by the gas pressure sensor is less than 18.5 KPa or greater than 20.5 KPa, the air tightness of the wire harness to be tested is unqualified. After the air tightness test of the wire harness is completed, the wire harness to be tested can be taken out by reversing the operation. It is worth noting that the number of the positioning assembly and the air charging assembly can be arbitrarily set according to the number of the connectors of the wire harness to be tested to meet the testing requirements of the wire harness to be tested with multiple wire harness branches, and further improve the application range of the wire harness air tightness testing device. In summary, the wire harness air tightness testing device can accurately position the wire harness to be tested, adapt to the length requirements of different wire harnesses to be tested, and simply, quickly and accurately measure the air tightness of the wire harness to be tested.

[0042] Preferably, referring to Figure 1 , the wire harness air tightness testing device further comprises a mounting plate 5, and the bottom of the air charging assembly 1 or / and the bottom of the positioning assembly 2 is provided with a suction cup.

[0043] The inflatable assembly 1 and the positioning assembly 2 are movably arranged on the mounting plate 5 through the suction cups at the bottom.

[0044] In this embodiment, the suction cups are additionally arranged at the bottom of the inflatable assembly and the positioning assembly, and the suction cups are vacuum-sucked on the mounting plate. The operator can quickly install, dismount, or adjust the position of the inflatable assembly and the positioning assembly on the mounting plate through the suction cups, thereby greatly improving the flexibility of the wire harness air tightness testing device and the application range.

[0045] Preferably, referring to Figure 1 , the wire harness air tightness testing device further comprises a double-hand switch 6 arranged on one side of the mounting plate 5.

[0046] The first end of the double-hand switch 6 is connected with the air valve 3, and the second end of the double-hand switch 6 is connected with the first testing interface 12 and the air inlet channel 13.

[0047] In this embodiment, the double-hand switch is additionally arranged on the wire harness air tightness testing device. When the operator tests the wire harness to be tested, the operator needs to press the double-hand switch with both hands at the same time and reach a preset time to open the double-hand switch. At this time, the testing gas of the air valve passes through the double-hand switch and the air inlet channel and finally enters the inside of the wire harness to be tested to complete the inflation process. On the one hand, the operator needs to frequently ventilate and cut off the gas to complete the testing of the batch of wire harnesses to be tested. The double-hand switch can avoid the frequent opening and closing of the air valve, thereby preventing the air valve from being damaged and prolonging the service life of the device. On the other hand, when the locking cylinder is in action, the operator's hands are pressed on the double-hand switch, which can effectively prevent the locking cylinder from clamping the operator's hands and improve the safety of the wire harness air tightness testing device.

[0048] Preferably, referring to Figure 2 , the front side of the first testing interface 12 is conical.

[0049] The middle part of the first testing interface 12 is provided with a sealing area 121, and a sealing ring is arranged in the sealing area.

[0050] In this embodiment, the front side of the first test interface is conical. When the connector of the wire harness to be tested contacts the first test interface, the connector of the wire harness to be tested is automatically aligned with the center of the first test interface, so that the connector of the wire harness to be tested and the center of the first test interface are more easily aligned. In addition, the conical structure is gradually compressed when pressure is applied, thereby improving the fit of the connector and the first test interface and further improving the air tightness of the device. In the middle of the first test interface, a separate sealing area is designed, and a sealing ring is arranged to effectively fix the sealing ring and prevent the first test interface from being displaced due to pressure or repeated use. At the same time, the combination of the conical design of the front side of the first test interface and the connector of the wire harness to be tested reduces the friction and stretching of the sealing ring when the connector is connected or disconnected, thereby avoiding excessive wear of the sealing ring due to repeated use, improving the air tightness of the device during testing, and further improving the accuracy of the air tightness measurement of the wire harness to be tested.

[0051] More preferably, referring to Figure 2 , the sealing area 121 comprises: a first sealing groove 121a, a second sealing groove 121b, a first sealing ring arranged in the first sealing groove 121a, and a second sealing ring arranged in the second sealing groove 121b;

[0052] The first sealing groove 121a is arranged on the lower side of the test interface.

[0053] The second sealing groove 121b is arranged on the upper side of the test interface.

[0054] The first sealing groove 121a and the second sealing groove 121b are coaxially arranged.

[0055] In this embodiment, the sealing area adopts a coaxial design of double sealing grooves, and there is a proper distance between the first sealing groove and the second sealing groove, so that the first sealing ring and the second sealing ring are independent of each other and do not interfere with each other. The two independent sealing rings provide a double sealing effect. Even if one of the sealing rings fails due to aging or damage, the other sealing ring can still provide basic sealing capability, thereby greatly improving the sealing reliability. For example, in this application, the distance between the first sealing groove and the second sealing groove is 3-5 mm, so as to balance the structural strength and the sealing effect and improve the reliability and stability of the device during testing. More preferably, an exhaust hole is arranged between the first sealing groove and the second sealing groove to avoid the retention of test gas in the space between the two sealing rings, thereby reducing the risk of leakage caused by the accumulation of test gas and further improving the air tightness and stability of the device.

[0056] More preferably, referring to Figure 2 , the depth of the first sealing groove 121a is greater than the depth of the second sealing groove 121b, and the hardness of the first sealing ring is greater than the hardness of the second sealing ring.

[0057] In this embodiment, the first sealing groove has a large depth to accommodate the first sealing ring with high hardness. In a high air pressure range, the first sealing ring is elastically deformed to gradually fill the entire sealing groove and tightly fit on the connector of the wire harness to be tested, thereby achieving a good sealing effect. The second sealing groove has a small depth to accommodate the second sealing ring with high softness. In a small air pressure range, the second sealing ring is elastically deformed to fill the entire sealing groove and tightly fit on the connector of the wire harness to be tested, thereby achieving a good sealing effect. The double sealing structure enables the device to maintain good air tightness in different air pressure ranges, thereby improving the reliability of the wire harness air tightness testing device and the accuracy of air tightness testing.

[0058] More preferably, the first sealing groove 121a or / and the second sealing groove 121b has a slot width smaller than a slot bottom width.

[0059] In this embodiment, the first sealing groove or / and the second sealing groove has a slot width smaller than a slot bottom width. The slot of the first sealing groove and the second sealing groove is narrowed to form a chamfer, so that the first sealing ring or / and the second sealing ring is more stable in the sealing groove, thereby avoiding the sealing ring from jumping out and further improving the sealing effect.

[0060] Preferably, referring to Figure 1 , the inflation assembly 1 further comprises a first positioning groove 14 arranged at the front end of the locking cylinder 11.

[0061] The first positioning groove 14 has a width greater than or equal to the diameter of the wire harness to be tested, but smaller than the width of the connector of the first end of the wire harness to be tested.

[0062] In this embodiment, after the first end of the wire harness to be tested is placed in the first positioning groove, one side of the first positioning groove abuts against the connector of the first end of the wire harness to be tested, thereby tightly pressing the connector of the wire harness to be tested in the first test interface. This prevents the wire harness to be tested from leaking gas during air tightness testing, thereby further improving the reliability of the device testing.

[0063] Preferably, referring to Figure 3 , the positioning assembly 2 further comprises a push rod arranged on one side of the test interface 22 and a cross positioning groove 24 arranged on both sides of the second positioning groove 23. In this embodiment, on the one hand, the push rod is arranged on one side of the test interface. The operator can adjust the position of the second test interface on the slide rail according to the length, bending, and twisting of the wire harness by the push rod. This avoids overstretching the wire harness to be tested during air tightness testing, thereby preventing damage to the wire harness to be tested and improving the reliability and safety of air tightness testing. On the other hand, the cross positioning groove is arranged on both sides of the second positioning groove. This is compatible with different types of connectors of the wire harness to be tested, thereby greatly improving the application range of the wire harness air tightness testing device.

[0064] Preferably, the gas provided by the gas inlet channel 13 for the first test interface is nitrogen, so as to more effectively prevent oxidation and corrosion of the metal and material inside the wire harness to be tested, and improve the service life of the wire harness testing device.

[0065] The technical effects and the combination of technical features of the wire harness airtightness testing device are not described here again. The above-described embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model.

Claims

1. A wiring harness air tightness testing device characterized by, The utility model relates to a kind of test device for wire harness, including: Inflation assembly, positioning assembly, gas valve and air pressure sensor; Inflation assembly, comprising: locking cylinder, first test interface, and air inlet channel connected with locking cylinder and first test interface; Positioning assembly, comprising: slide rail, second test interface slidably arranged on slide rail, and second positioning slot arranged on one side of slide rail; Gas valve is arranged at one end of air inlet channel, for controlling the on-off of gas in air inlet channel; Air pressure sensor is arranged in first test interface; The connector of the first end of the wire harness to be tested is connected with the first test interface;The connector of the second end of the wire harness to be tested is connected with the second test interface; Air inlet channel is connected with the inflation port on the connector of the first end of the wire harness to be tested through the first test interface.

2. The wiring harness air tightness testing device of claim 1, wherein, Further comprising: Mounting plate; the bottom of inflation assembly or / and the bottom of positioning assembly is provided with suction cup; Inflation assembly and positioning assembly are movably arranged on mounting plate by the suction cup of bottom.

3. The wiring harness air tightness testing device of claim 2, wherein, Further comprising: Double-hand switch is arranged on one side of mounting plate; The first end of double-hand switch is connected with gas valve, and the second end of double-hand switch is connected with first test interface and air inlet channel.

4. The wire harness air tightness testing device of claim 1, wherein, The front side of first test interface is conical; The middle part of first test interface is provided with sealing area, and sealing ring is arranged in sealing area.

5. The wire harness air tightness testing device of claim 4, wherein, Sealing area, comprising: first sealing groove, second sealing groove, first sealing ring arranged in first sealing groove and second sealing ring arranged in second sealing groove; First sealing groove is arranged on the upper side of test interface; Second sealing groove is arranged on the lower side of test interface; First sealing groove and second sealing groove are coaxially arranged.

6. The wire harness air tightness testing device of claim 5, wherein, The depth of first sealing groove is greater than the depth of second sealing groove;The hardness of first sealing ring is greater than the hardness of second sealing ring.

7. The wire harness air tightness testing device of claim 5, wherein, Exhaust hole is arranged between first sealing groove and second sealing groove.

8. The wire harness air tightness testing device of claim 5, wherein, The width of groove opening of first sealing groove or / and second sealing groove is less than the width of groove bottom.

9. The wire harness air tightness testing device of claim 1, wherein, Inflation assembly further comprises: first positioning slot is arranged at the front end of locking cylinder; The width of first positioning slot is greater than or equal to the diameter width of wire harness to be tested, but less than the connector width of the first end of wire harness to be tested.

10. The wire harness air tightness testing device of claim 1, wherein, Positioning assembly further comprises: push rod is arranged on one side of test interface, and cross positioning slot is arranged on both sides of second positioning slot.

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