Air tightness testing device

Abstract

The utility model provides an air tightness testing device, which is used for testing the air tightness of a wire harness terminal, and comprises a test board, the top surface of the test board is provided with at least one accommodating groove, the accommodating groove can accommodate a part of the shell of the wire harness terminal, each accommodating groove is communicated with an air tightness testing module, and the air tightness testing module can inflate the accommodating groove; the pressing part is movably arranged above the containing grooves, receding grooves are formed in the side, facing the test table, of the pressing part, and the receding grooves are configured to be in one-to-one correspondence with the containing grooves; when the pressing part can be driven to approach the test bench, the pressing part can tightly press a part of the housing of the wire harness terminal in the accommodating groove. According to the air tightness testing device provided by the utility model, through the arrangement of the pressing part and the accommodating groove, the pressing part can tightly press a part of the shell of the wire harness terminal in the accommodating groove, so that the air tightness testing module inflates and pressurizes the accommodating groove, the air tightness detection of the wire harness terminal is realized, and the use quality of the wire harness terminal is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical component detection, in particular to an airtightness testing device. Background Art

[0002] With the development of the automobile industry, cars have become products that have more humanized requirements in addition to simple driving. Especially with the development of the electronics industry, cars have added more modular functions in terms of safety, comfort, and enjoyment. In order to make the various electronic module components on the vehicle work properly and realize the information interconnection inside the vehicle, the various electronic module components on the vehicle are connected together through wiring harnesses.

[0003] The wiring harness is provided with wiring harness terminals for connecting to various components. In order to ensure the normal operation of various components of the vehicle, it is necessary to prevent the external environment from affecting the wiring harness terminals during the use of the vehicle. These influences include siphoning, interference of external water particles, metal particles and other conductive media on the wiring harness terminals. Therefore, it is necessary to use an airtightness test device to detect the airtightness of the wiring harness terminals to ensure that the wiring harness terminals are not affected by the external environment. However, existing airtightness test devices usually have the problem of poor fixing effect of the wiring harness terminals. The wiring harness terminals are easily lifted up by the airflow, resulting in insufficient accuracy of the airtightness test. Utility Model Content

[0004] In view of this, the utility model aims to provide an airtightness testing device to realize airtightness detection of wiring harness terminals and improve the fixing effect of wiring harness terminals to ensure the accuracy of airtightness testing.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] An airtightness testing device, used for testing the airtightness of a wiring harness terminal, comprises a test bench, wherein the top surface of the test bench is provided with at least one receiving groove, the receiving groove can accommodate a partial shell of the wiring harness terminal, each of the receiving grooves is respectively connected to an airtightness testing module, and the airtightness testing module can inflate the receiving groove; a clamping portion, movably arranged above the receiving groove, the clamping portion is provided with an avoidance groove on a side facing the test bench, and the avoidance grooves are configured to be a plurality of one-to-one corresponding to each of the receiving grooves; when the clamping portion is drivable close to the test bench, the clamping portion can press the partial shell of the wiring harness terminal tightly into the receiving groove.

[0007] Furthermore, the test bench is provided with a plurality of sealing strips arranged around the notches of each of the accommodating grooves.

[0008] Furthermore, it also includes a base, two columns arranged on two opposite sides of the test bench, a beam connected between the top ends of the two columns, and a first driving part arranged on the beam; the test bench is arranged on the base, and the driving end of the first driving part can pass through the beam and be connected to the clamping part; when the first driving part is started, the clamping part following the driving end can approach or move away from the test bench.

[0009] Furthermore, the first driving part is a cylinder; the cylinders are configured as a plurality of cylinders distributed at intervals along the crossbeam, and the driving end of each cylinder is connected to the clamping part.

[0010] Furthermore, a movable seat is provided between the two columns; the movable seat can slide along the extension direction of the column, and the clamping portion is connected to the driving end through the movable seat.

[0011] Furthermore, two opposite ends of the movable seat are respectively provided with linear bearings sleeved on the two columns.

[0012] Furthermore, it also includes a dotting portion, which is configured to have a plurality of dotting portions corresponding one to one with each of the accommodating grooves; when the dotting portion is driven to move and abut against the shell, the dotting portion marks marking points on the outer surface of the shell.

[0013] Furthermore, the base is provided with a connecting part connecting each of the dotting parts, and a second driving mechanism for driving the connecting part to move laterally; because the second driving mechanism drives the connecting part to move, each of the dotting parts following the connecting part can move laterally and abut against the shell.

[0014] Furthermore, the second driving mechanism is a slide cylinder.

[0015] Furthermore, the dotting portion is a paint pen, and when the tip of the paint pen abuts against the shell, the paint pen paints the marking point on the shell.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The airtightness testing device described in the utility model, through the arrangement of the clamping part and the accommodating groove, the clamping part can press part of the shell of the wiring harness terminal in the accommodating groove, so that the airtightness testing module inflates and pressurizes the accommodating groove, and detects the change of air pressure in the accommodating groove, thereby judging whether there is air leakage in the shell of the wiring harness terminal, thereby realizing the airtightness detection of the wiring harness terminal and improving the fixing effect of the wiring harness terminal to ensure the accuracy of the airtightness test.

[0018] The sealing strip arranged at the notch of the receiving groove can fill the gap between the shell and the receiving groove when the shell is pressed against the receiving groove by the pressing portion, thereby improving the sealing between the shell and the receiving groove and ensuring the normal progress of the airtightness test.

[0019] Through the arrangement of the chassis, the column, the crossbeam and the first driving part, the first driving part can drive the clamping part to move, so as to clamp the wiring harness terminal housing in the receiving groove of the test bench and improve the stability of the movement of the clamping part.

[0020] The first driving part is configured as a plurality of cylinders, which can increase the pressure of the clamping part and connect the clamping part to each driving end at the same time. When the driving end pushes against the clamping part, the clamping part is subjected to uniform force, and the end of the clamping part is prevented from bending, thereby improving the clamping and fixing effect of the clamping part on the shell.

[0021] By setting the movable seat, the clamping part is fixed on the movable seat, which can prevent the clamping part from bending upward at both ends due to uneven force. At the same time, the movable seat can make the clamping part evenly stressed, ensuring the fixing effect of the clamping part on the wiring harness terminal housing.

[0022] The two opposite ends of the movable seat are respectively provided with linear bearings. The arrangement of the linear bearings reduces the sliding resistance between the movable seat and the two columns, thereby improving the smoothness of the movement of the movable seat and the pressing part.

[0023] By setting up the dotting part, qualified wiring harness terminals can be marked, making it easier for operators to distinguish and avoid confusion between good and defective products.

[0024] The second driving part for driving the dotting part to move adopts a slide cylinder, which has good movement accuracy and driving force, can drive the dotting part to dot on the shell, and prevent damage to the dotting part to a certain extent.

[0025] The paint pen is used as the dotting part, and obvious marking points can be painted on the housing of the wiring harness terminal, so as to facilitate observation by operators. At the same time, the dotting method of painting the marking points is not easy to damage the outer surface of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of the overall structure of the airtightness testing device described in an embodiment of the utility model;

[0028] Description of reference numerals:

[0029] 1. Test bench; 101. Receiving groove; 102. Sealing strip;

[0030] 2. Pressing part; 201. Avoidance groove;

[0031] 3. Base; 301. Column; 302. Beam; 303. Cylinder;

[0032] 4. Movable seat; 401. Linear bearing;

[0033] 5. Dotting unit; 501. Connecting unit; 502. Second driving unit. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0035] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0036] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] This embodiment relates to an air tightness testing device. In terms of overall structure, the air tightness testing device includes a testing platform 1 and a pressing part 2 .

[0040] Among them, at least one receiving groove 101 is provided on the top surface of the test bench 1, and the receiving groove 101 can accommodate part of the housing of the wiring harness terminal, and each receiving groove 101 is respectively connected to the airtight test module, and the airtight test module can inflate the receiving groove 101. And the clamping part 2 is movably arranged above the receiving groove 101, and the side of the clamping part 2 facing the test bench 1 is provided with an avoidance groove 201, and the avoidance groove 201 is configured to be a plurality of corresponding to each receiving groove 101.

[0041] When the pressing portion 2 is drivable to approach the test bench 1 , the pressing portion 2 can press a portion of the housing of the wiring harness terminal into the accommodating groove 101 .

[0042] It can be understood that the housing of the wiring harness terminal includes a lower housing and an upper housing, and the part of the housing of the wiring harness terminal in the receiving groove 101 is part of the lower housing, and the lower housing is the connection end of the wiring harness terminal. At the same time, the upper housing of the wiring harness terminal can pass through the cable, so the avoidance groove 201 on the pressing part 2 can avoid the cable part of the wiring harness terminal and press the wiring harness terminal tightly in the receiving groove 101.

[0043] As described above, through the arrangement of the clamping portion 2 and the accommodating groove 101, the clamping portion 2 can press part of the housing of the wiring harness terminal tightly in the accommodating groove 101, so that the airtight test module inflates and pressurizes the accommodating groove 101, and detects the change in air pressure in the accommodating groove 101, thereby determining whether there is air leakage in the housing of the wiring harness terminal, and realizing airtightness detection of the wiring harness terminal, thereby improving the use quality of the wiring harness terminal.

[0044] Based on the above overall introduction, specifically, since the test bench 1 of this embodiment can be provided with a plurality of receiving grooves 101, when the lower shell of the wiring harness terminal is formed with only one connection end, the airtightness test device of this embodiment can be used to simultaneously perform airtightness tests on a plurality of wiring harness terminals. Alternatively, when the lower shell of the wiring harness terminal has a plurality of connection ends matching the receiving grooves 101, the airtightness test device of this embodiment can perform airtightness tests on the wiring harness terminal.

[0045] In addition, the airtight test module of this embodiment includes an air pump and a pressure detection unit. The air pump can inflate and pressurize each containing tank 101, and the pressure detection unit can detect the pressure value in each containing tank 101, and convert the pressure value into an electrical signal and send it to the industrial controller or PLC controller connected to the airtight test module. In specific implementation, the air pump and pressure detection unit of this embodiment are conventional air pumps and conventional pressure detection units well known to those skilled in the art. At the same time, when the wiring harness terminal is subjected to an airtightness test, the working mode of the airtightness test module is as follows: first, the air pump is started to inflate each receiving slot 101 to a certain pressure value, and the pressure is maintained for a certain period of time; during the pressure maintenance process, the pressure detection unit detects the pressure in each receiving slot 101 in real time; when the drop in the pressure value in each receiving slot 101 is less than a preset value, the airtightness of the wiring harness terminal is judged to be qualified, and when the drop in the pressure value in any receiving slot 101 is greater than or equal to the above preset value, the airtightness of the connector test terminal in the corresponding receiving slot 101 is judged to be unqualified, and at the same time, the pressure detection unit sends an electrical signal to the industrial computer or PLC controller, thereby alarming the operator and reminding the operator that the airtightness of the wiring harness terminal in the corresponding receiving slot 101 is unqualified.

[0046] In addition, since the housing of the wiring harness terminal is formed by the upper housing and the lower housing being buckled together, when the upper housing is buckled on the lower housing, the upper housing can be self-locked in place on the lower housing. Therefore, when the lower housing is installed in the receiving groove 101, the pressing part 2 can drive the upper housing to buckle on the lower housing through the movement of the pressing part 2, so as to realize the assembly of the wiring harness terminal. At the same time, after the assembly is completed, the air tightness of the wiring harness terminal can be immediately tested.

[0047] During the air tightness test, the part of the housing with the connection end of the wiring harness terminal is in the receiving groove 101, and due to the action of the clamping part 2, the part of the housing is tightly fitted with the edge of the receiving groove 101, so that a sealed cavity is formed in the receiving groove 101, thereby realizing the air tightness test of the wiring harness terminal. In order to further improve the sealing between the housing of the wiring harness terminal and the receiving groove 101, a plurality of sealing strips 102 arranged around the notches of each receiving groove 101 are provided on the test bench 1 of this embodiment. Through the setting of the sealing strips 102, when the housing is pressed against the receiving groove 101 by the clamping part 2, the sealing strips 102 can fill the gap between the housing and the receiving groove 101, improve the sealing between the housing and the receiving groove 101, thereby ensuring the normal progress of the air tightness test and preventing the accuracy of the air tightness test from being affected by air leakage between the housing and the receiving groove 101.

[0048] In order to ensure the stability of the movement of the clamping part 2, the airtightness testing device of this embodiment also includes a base 3, two columns 301 arranged on two opposite sides of the test bench 1, a beam 302 connected between the top ends of the two columns 301, and a first driving part arranged on the beam 302. The above-mentioned test bench 1 is arranged on the base 3, and the driving end of the first driving part can penetrate the beam 302 and be connected to the clamping part 2. When the first driving part is started, the clamping part 2 at the follower driving end can approach or move away from the test bench 1. Therefore, through the setting of the first driving part, the movement of the clamping part 2 can be realized, so as to press the wiring harness terminal housing into the receiving groove 101 of the test bench 1, and the stability of the movement of the clamping part 2 is improved.

[0049] Specifically, since the clamping part 2 of this embodiment extends along the arrangement direction of each receiving groove 101 and can press the shell tightly in each receiving groove 101. In order to improve the pressing and fixing effect of the clamping part 2 on the shell, the first driving part of this embodiment is a cylinder 303, and the cylinder 303 is configured as a plurality of cylinders 303 distributed at intervals along the crossbeam 302, and the driving end of each cylinder 303 is connected to the clamping part 2. By providing a plurality of cylinders 303, the pressure of the clamping part 2 can be increased, and the clamping part 2 is connected to each driving end at the same time. When the driving end pushes against the clamping part 2, the clamping part 2 is subjected to uniform force, and the end of the clamping part 2 is prevented from bending, thereby improving the pressing and fixing effect of the clamping part on the shell.

[0050] In addition, since the clamping part 2 is used to clamp the housing, it can also push the upper housing to buckle and self-lock on the lower housing, thereby realizing the assembly of the wiring harness terminal. In the specific implementation, the clamping part 2 can be made of a material with a certain elasticity, such as an elastic material such as rubber, so that it can clamp the housing while avoiding damaging the housing of the wiring harness terminal. In addition, a movable seat 4 is provided between the two columns 301 of the present embodiment. The movable seat 4 can slide along the extension direction of the column 301, and the clamping part 2 is connected to the driving end through the movable seat 4. By setting the movable seat 4, the clamping part 2 is fixed on the movable seat 4, which can prevent the clamping part 2 from bending upward at both ends due to uneven force. At the same time, the movable seat 4 is provided to connect each driving end. When the driving end pushes against the clamping part 2, the movable seat 4 can make the clamping part 2 evenly stressed, thereby improving the use effect and service life of the clamping part 2, thereby ensuring the fixing effect of the clamping part 2 on the wiring harness terminal housing.

[0051] In order to improve the smoothness of the sliding of the movable seat 4 on the pillars 301, the two opposite ends of the movable seat 4 of this embodiment are respectively provided with linear bearings 401 sleeved on the two pillars 301. The provision of the linear bearings 401 reduces the sliding resistance between the movable seat 4 and the two pillars 301, thereby improving the smoothness of the movement of the movable seat 4 and the pressing part 2.

[0052] In order to facilitate operators to distinguish the connector terminals that have been tested and qualified, and to prevent confusion between good products and bad products, the airtightness testing device of this embodiment also includes a dotting portion 5, which is configured to correspond to each accommodating groove 101. After the wiring harness terminal passes the airtightness test and passes, when the dotting portion 5 is driven to move and abuts against the shell, the dotting portion 5 marks a mark on the outer surface of the shell. By setting the dotting portion 5, qualified wiring harness terminals can be marked, which is convenient for operators to distinguish and avoid confusion between good products and bad products.

[0053] Specifically, in order to drive the dotting part 5 to mark the mark points on the shell, the base 3 of this embodiment is provided with a connecting part 501 connecting each dotting part 5, and a second driving mechanism for driving the connecting part 501 to move horizontally. Because the second driving mechanism drives the connecting part 501 to move, each dotting part 5 of the follower connecting part 501 can move horizontally and abut against the shell, so as to ensure that the dotting part 5 can be driven to move and mark the mark points on the shell of the qualified wiring harness terminal. In specific implementation, the second driving part 502 is connected to the same industrial computer or PLC controller as the airtight test module. When the airtight test module determines that the airtightness of the wiring harness terminal is qualified and sends an electrical signal to the industrial computer or PLC controller, the industrial computer or PLC controller can control the second driving part 502 to drive each dotting part 5 on the connecting part 501 to do the dotting.

[0054] In this embodiment, as an implementation form, the second driving part 502 of this embodiment is a slide cylinder 303, and the connecting part 501 is arranged on the slide of the slide cylinder 303. The slide cylinder 303 has good moving accuracy and driving force, can drive the dotting part 5 to dot on the shell, and prevent damage to the dotting part 5 to a certain extent.

[0055] In order to facilitate the dotting part 5 to mark obvious marking points on the housing of the wiring harness terminal, so as to facilitate observation by operators, the dotting part 5 of this embodiment is a paint pen. When the tip of the paint pen abuts against the housing, the paint pen paints the marking points on the housing. By using a paint pen as the dotting part 5, obvious marking points can be painted on the housing of the wiring harness terminal, so as to facilitate observation by operators. At the same time, the dotting method of painting the marking points is not easy to damage the outer surface of the housing. In specific implementation, the color of the paint pen should be significantly different from the color of the wiring harness terminal housing, or the colors of the two should be complementary to each other. For example, when the outer surface of the wiring harness terminal housing is black, the paint pen of this embodiment should use a white paint pen to facilitate observation of the marking points, so as to facilitate observation and identification by operators.

[0056] In summary, the airtightness testing device of this embodiment, through the setting of the clamping part 2 and the accommodating groove 101, the clamping part 2 can press part of the shell of the wiring harness terminal in the accommodating groove 101, so that the airtightness testing module inflates and pressurizes the accommodating groove 101, and detects the change of air pressure in the accommodating groove 101, thereby judging whether there is air leakage in the shell of the wiring harness terminal, realizing the airtightness detection of the wiring harness terminal, and improving the fixing effect of the wiring harness terminal to ensure the accuracy of the airtightness test, and has good practicality.

[0057] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air tightness testing device for testing the air tightness of a wiring harness terminal, characterized in that: include: A test bench, wherein the top surface of the test bench is provided with at least one receiving groove, the receiving groove can receive a part of the housing of the wiring harness terminal, each of the receiving grooves is respectively connected to an airtight test module, and the airtight test module can inflate the receiving groove; A pressing part, movably disposed above the receiving groove, a side of the pressing part facing the test bench is provided with an avoidance groove, and the avoidance grooves are configured to be a plurality of grooves corresponding to each of the receiving grooves; When the pressing portion is drivable to approach the test bench, the pressing portion can press a portion of the housing of the wiring harness terminal into the accommodating groove.

2. The airtightness testing device according to claim 1, characterized in that: The test bench is provided with a plurality of sealing strips surrounding the notches of the accommodating grooves.

3. The airtightness testing device according to claim 1, characterized in that: It also includes a base, two columns arranged on two opposite sides of the test bench, a crossbeam connected between the top ends of the two columns, and a first driving part arranged on the crossbeam; The test bench is provided on the base, and the driving end of the first driving part can penetrate the crossbeam and be connected to the pressing part; When the first driving part is started, the pressing part following the driving end can approach or move away from the test bench.

4. The airtightness testing device according to claim 3, characterized in that: The first driving part is a cylinder; The cylinders are configured to be multiple and spaced apart along the crossbeam, and the driving end of each cylinder is connected to the pressing portion.

5. The airtightness testing device according to claim 3, characterized in that: A movable seat is provided between the two upright posts; The movable seat can slide along the extension direction of the column, and the pressing part is connected to the driving end through the movable seat.

6. The airtightness testing device according to claim 5, characterized in that: Two opposite ends of the movable seat are respectively provided with linear bearings sleeved on the two columns.

7. The airtightness testing device according to any one of claims 3 to 6, characterized in that: Also includes: a dotting portion, the dotting portion being configured to correspond one-to-one to each of the receiving grooves; When the dotting portion is driven to move and abut against the shell, the dotting portion marks marking points on the outer surface of the shell.

8. The airtightness testing device according to claim 7, characterized in that: The base is provided with a connecting portion connecting the dotting portions, and a second driving mechanism for driving the connecting portion to move laterally; Since the second driving mechanism drives the connecting part to move, each of the dotting parts following the connecting part can move laterally and abut against the shell.

9. The airtightness testing device according to claim 8, characterized in that: The second driving mechanism is a slide cylinder.

10. The airtightness testing device according to claim 7, characterized in that: The dotting portion is a paint pen. When the tip of the paint pen abuts against the shell, the paint pen paints the marking point on the shell.

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