Air tightness detection equipment for automobile wire harness

Abstract

According to the air tightness detection equipment for the automobile wire harness, the sealing performance of the whole set of wire harness is obtained through air tightness detection, the detection is efficient and convenient, and the detection accuracy is high. The base body comprises a bottom plate, two side plates and a top plate, the length of the bottom plate is larger than that of the top plate, and the top plate is arranged over one section of area of the bottom plate through the two side plates; the press-fitting driving mechanism comprises a press-fitting air cylinder and a pressing plate; the lower surface of the upper die is provided with a plurality of lower convex pressing blocks which are profiled at the wire body position of the to-be-tested automobile wire harness, and is provided with a pressing cover corresponding to the upper interface position of the lower convex gas circuit pipe; the upper surface of the lower die is provided with a placing wire groove for the to-be-tested automobile wire harness, the lower die is provided with a lower convex gas circuit pipe corresponding to the end part of the to-be-tested automobile wire harness, the upper part of the lower convex gas circuit pipe is communicated with the placing wire groove, and the top of the lower convex gas circuit pipe is arranged corresponding to the position of the gland; and the linear moving module comprises a linear advancing air cylinder, a guide rail assembly and a translation plate.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness detection, in particular to an air tightness detection device for automobile wire harnesses. Background Art

[0002] Wiring harness structures are required in automobiles, and some wiring harness structures need to be installed in positions that are in contact with the external environment. After actual assembly, it was found that if the sealing performance of the wiring harness structure is not good, external water will enter the interior of the wiring harness, causing signal loss or abnormality. Therefore, it is necessary to ensure the sealing performance of the wiring harness before assembly. The existing detection method is to perform airtightness detection on the joint part of the wiring harness. Since there are relatively many joints in the wiring harness, the actual detection process is time-consuming and labor-intensive. In addition, even after all joints of the entire set of wiring harnesses are tested to ensure that each joint is sealed reliably, there are still unsealed parts in the entire set of wiring harnesses. For this reason, it is urgent to adjust the existing detection mode that only detects the sealing performance of the joint position, and it is necessary to study a device that can perform airtightness detection on the entire set of wiring harnesses. Summary of the Invention

[0003] In response to the above problems, the present invention provides an air tightness testing device for automobile wiring harnesses, which performs air tightness testing on the entire wiring harness to obtain its sealing performance. The testing is efficient, convenient, and has high detection accuracy.

[0004] An air tightness detection device for automobile wiring harness, characterized in that it comprises: The base body includes a bottom plate, two side plates, and a top plate. The bottom plate is longer than the top plate, and the top plate is placed directly above a section of the bottom plate through the two side plates. A press-fitting drive mechanism comprising a press-fitting cylinder and a press plate; The upper die has a lower surface shaped like the wire body of the automobile wiring harness to be tested and is provided with a plurality of lower convex pressing blocks, and a pressure cover is provided corresponding to the upper interface position of the lower convex air pipe; The lower mold has an upper surface provided with a wire groove for placing the automotive wiring harness to be tested, and the lower mold is provided with a lower convex air pipe corresponding to the end of the automotive wiring harness to be tested, the upper portion of the lower convex air pipe is connected to the wire groove, and the top of the lower convex air pipe is provided corresponding to the position of the gland, and a sealing ring is provided on the outer periphery of the surface area of ​​the wire groove and the upper surface of the lower convex air pipe of the lower mold, and the upper surface of the sealing ring is convex from the upper surface of the lower mold; and a linear motion module, which includes a linear motion cylinder, a guide rail assembly, and a translation plate; The upper surface of the base plate is provided with a guide rail assembly along its length direction, the translation plate is arranged on the guide rail assembly through a guide rail pair and is translated along the guide rail assembly, the output end of the linear motion cylinder is connected to the bottom of the translation plate, the upper surface of the translation plate is fixedly mounted with the lower surface of the lower mold, the lower convex air path pipe passes through the corresponding avoidance hole of the translation plate and is exposed downward, the lower convex air path pipe is used to connect to an external air path detection module, and the external air path detection module is used to perform vacuuming and detect air pressure values; The output end of the press-fitting cylinder is connected to a lower pressing plate, the lower surface of the pressing plate is fixedly connected to the upper surface of the upper mold, and the automobile wiring harness to be tested is placed in the wire groove in the air path detection state. After the upper mold is pressed down and tightly against the upper surface of the sealing ring, the air path detection module is pneumatically operated.

[0005] It is further characterized by: The wire placement slots include wire body placement slots and connector placement slots, and all connector placement slots and wire body placement slots are connected; The four corners of the pressing plate are respectively provided with linear bearings, and the positions of the top plate and the bottom plate corresponding to the linear bearings are provided with guide rods to ensure that the pressing plate is parallel to the linear direction of the pressing operation; The length direction of the bottom plate is greater than the length of the top plate, and one end of the bottom plate in the length direction is used to place the lower mold with an unobstructed upper end; The cylinder seat of the linear motion cylinder is fixedly mounted on the other end of the base plate in the longitudinal direction through a cylinder body mounting seat. When the piston rod of the linear motion cylinder is in a retracted state, the lower die is located directly below the upper die and is in the detection position. When the piston rod of the linear motion cylinder is in an extended state, the lower die is located in the loading position, so that the wiring harness to be detected is conveniently placed in the wiring groove of the lower die. The guide rail assembly includes a backing plate and guide rails on both sides. Corresponding guide rails are provided on both sides of the width direction of the backing plate, and the length of the guide rails covers the detection station and the loading station; The exposed lower portion of the downwardly convex air path tube is located outside the width direction of the pad, ensuring that the downwardly convex air path tube is conveniently connected to the external air path detection module; A plurality of foot pads are arranged at the bottom of the base plate to facilitate reliable adjustment of the levelness of the entire device; Sensing devices are installed at the feed port positions of the two side plates corresponding to the lower mold. After the sensing device senses that the lower mold has moved and is securely placed directly under the upper mold, the sensing device notifies the operator to perform the lower mold closing action and subsequent airtightness detection.

[0006] After adopting the above technical solution, the wiring harness to be tested is placed in the wire groove of the lower mold, and then the linear motion cylinder pushes the translation plate and drives the lower mold to be placed directly below the upper mold. Then the upper mold moves down together with the pressure plate under the linear motion of the pressing cylinder until the upper and lower molds are completed. The sealing ring is used to ensure the sealing of the mold cavity after the upper and lower molds are closed. Then the air path detection module pneumatically operates to complete the vacuum operation of the mold cavity through the lower convex air path tube, and determines the sealing performance of the entire automotive wiring harness by detecting the air pressure after vacuuming. It uses air tightness testing to determine the sealing performance of the entire set of wiring harnesses, and performs sealing testing on multiple sets of connectors and all wires at a time. The detection is efficient and convenient, and the detection accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention (unmolded state); Figure 2 The three-dimensional lower mold of the present invention Figure 1 ; Figure 3 The three-dimensional lower mold of the present invention Figure 2 ; Figure 4 A perspective view of the upper mold of the present invention; The names corresponding to the serial numbers in the figure are as follows: Base body 10, bottom plate 11, side plate 12, top plate 13, press-fitting drive mechanism 20, press-fitting cylinder 21, pressing plate 22, upper mold 30, lower convex pressure block 31, lower mold 40, wire placement groove 41, wire body placement groove 411, connector placement groove 412, lower convex air pipe 50, pressure cover 60, automobile wiring harness to be tested 70, sealing ring 80, linear motion module 90, linear travel cylinder 91, guide rail assembly 92, pad 921, guide rail 922, translation plate 93, linear bearing 100, guide rod 101, cylinder body mounting seat 110, foot pad 120, sensing device 130. DETAILED DESCRIPTION

[0008] An air tightness testing device for automobile wiring harnesses, see Figures 1-4 : It includes a base 10, a press-fitting drive mechanism 20, an upper mold 30, a lower mold 40, and a linear moving module 90; The base body 10 includes a bottom plate 11, two side plates 12, and a top plate 13. The bottom plate 11 is longer than the top plate 13. The top plate 13 is placed directly above a section of the bottom plate 11 through the two side plates 12. The press-fitting drive mechanism 20 includes a press-fitting cylinder 21 and a press plate 22; The lower surface of the upper mold 30 is provided with a plurality of lower convex pressing blocks 31 in the shape of the wire body of the automobile wiring harness 70 to be tested, and a pressure cover 60 is provided corresponding to the upper interface position of the lower convex air pipe 50; The upper surface of the lower mold 40 is provided with a wire groove 41 for placing the automotive wiring harness to be tested. The lower mold 40 is provided with a lower convex air pipe 50 at the end corresponding to the automotive wiring harness 70 to be tested. The upper part of the lower convex air pipe 50 is connected to the wire groove 41. The top of the lower convex air pipe 50 is provided at the position corresponding to the pressure cover 60. The outer periphery of the surface area of ​​the wire groove 41 and the upper surface of the lower convex air pipe 50 of the lower mold 40 is provided with a sealing ring 80. The sealing ring 80 protrudes from the upper surface of the lower mold 40. The linear motion module 90 includes a linear motion cylinder 91, a guide rail assembly 92, and a translation plate 93; A guide rail assembly 92 is provided on the upper surface of the base plate 11 along its length. The translation plate 93 is provided on the guide rail assembly 92 through a guide rail pair and is translationally arranged along the guide rail assembly 92. The output end of the linear cylinder 91 is connected to the bottom of the translation plate 93. The lower surface of the lower mold 40 is fixedly mounted on the upper surface of the translation plate 93. The lower convex air path pipe 50 passes through the corresponding avoidance hole of the translation plate 93 and is exposed downward. The lower convex air path pipe 50 is used to connect to an external air path detection module (not shown in the figure, belonging to conventional vacuum detection equipment). The external air path detection module is used to perform vacuum and detect the air pressure value. The output end of the press cylinder 21 is connected to the lower pressing plate 22, and the lower surface of the pressing plate 22 is fixedly connected to the upper surface of the upper mold 30. In the air path detection state, the automobile wiring harness 70 to be detected is placed in the wire groove 41. After the upper mold 30 is pressed down and tightly against the upper surface of the sealing ring, the air path detection module is pneumatically operated.

[0009] In a specific embodiment, the wire placement groove 41 includes a wire body placement groove 411 and a connector placement groove 412. All the connector placement grooves 411 and wire body placement grooves 412 are connected. In the mold closing state, a corresponding lower convex pressure block 31 is arranged above the wire body placement groove 411. The lower convex pressure block 31 presses the wire body to ensure that the position of the wire body is stable and reliable.

[0010] During specific implementation, linear bearings 100 are respectively provided at the four corners of the pressure plate 22, and guide rods 101 are provided at the positions of the top plate 13 and the bottom plate 11 corresponding to the linear bearings 100. The linear bearings 100 are mounted on the guide rods 101 to ensure that the pressure plate 22 is pressed downward in a parallel linear direction.

[0011] In a specific implementation, the length of the bottom plate 11 is greater than the length of the top plate 13, and one end of the bottom plate 11 in the length direction is used to place the lower mold 40 with an unobstructed upper end; The cylinder seat of the linear motion cylinder 91 is fixed to the other end of the length direction of the base plate 11 through the cylinder body mounting seat 110. When the piston rod of the linear motion cylinder 91 is in the retracted state, the lower mold 40 is located directly below the upper mold 30 and is in the detection position. When the piston rod of the linear motion cylinder 91 is in the extended state, the lower mold 40 is located at the loading position, which is convenient for placing the wiring harness to be tested in the wire placement groove 41 of the lower mold 40.

[0012] In a specific implementation, the guide rail assembly 92 includes a pad 921 and guide rails 922 on both sides. Corresponding guide rails 922 are provided on both sides of the pad 921 in the width direction. The length of the guide rails 922 covers the detection station and the loading station. The exposed lower portion of the downwardly convex air path tube 50 is located outside the width direction of the pad 921, ensuring that the downwardly convex air path tube 90 can be easily connected to the external air path detection module.

[0013] In a specific embodiment, a plurality of foot pads 120 are arranged at the bottom of the base plate 11 to facilitate reliable adjustment of the levelness of the entire device; The two side plates 12 are provided with sensing devices 130 at the feed port positions corresponding to the lower mold 40. After the sensing device 130 senses that the lower mold 40 has moved and is securely placed directly below the upper mold 30, the sensing device 130 notifies the operator to perform the downward mold closing action of the upper mold 30 and perform subsequent airtightness detection.

[0014] During specific implementation, the upper mold 30 is fixed to the pressure plate 22 by fasteners at the four corners, and the lower mold 40 is fixed to the translation plate 93 by fasteners at the four corners. The positions of the wire groove 41, the lower convex pressure block 31 and the sealing ring 80 formed between the upper mold 30 and the lower mold 40 are set according to the shape of the automobile wiring harness to be tested. For different automobile wiring harnesses, the upper mold 30 and the lower mold 40 can be replaced in time without replacing the entire set of equipment.

[0015] The working process is as follows: the wiring harness to be tested is placed in the wire groove of the lower mold, and then the linear motion cylinder pushes the translation plate and drives the lower mold to be placed directly below the upper mold. Then the upper mold moves down together with the pressure plate under the linear motion of the pressing cylinder until the upper and lower molds are completed. The sealing ring is used to ensure the sealing of the mold cavity after the upper and lower molds are closed. Then the air path detection module pneumatically operates the vacuum operation of the mold cavity through the lower convex air path tube, and determines the sealing performance of the entire automotive wiring harness by detecting the air pressure after vacuuming. The entire set of wiring harnesses is tested for air tightness to obtain its sealing performance, and multiple sets of connectors and all wires are tested for sealing at a time. The detection is efficient and convenient, and the detection accuracy is high.

[0016] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0017] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An air tightness testing device for automobile wiring harness, characterized in that: It includes: The base body includes a bottom plate, two side plates, and a top plate. The bottom plate is longer than the top plate, and the top plate is placed directly above a section of the bottom plate through the two side plates. A press-fitting drive mechanism comprising a press-fitting cylinder and a press plate; The upper die has a lower surface shaped like the wire body of the automobile wiring harness to be tested and is provided with a plurality of lower convex pressing blocks, and a pressure cover is provided corresponding to the upper interface position of the lower convex air pipe; The lower mold has an upper surface provided with a wire groove for placing the automotive wiring harness to be tested, and the lower mold is provided with a lower convex air pipe corresponding to the end of the automotive wiring harness to be tested, the upper portion of the lower convex air pipe is connected to the wire groove, and the top of the lower convex air pipe is provided corresponding to the position of the gland, and a sealing ring is provided on the outer periphery of the surface area of ​​the wire groove and the upper surface of the lower convex air pipe of the lower mold, and the upper surface of the sealing ring is convex from the upper surface of the lower mold; and a linear motion module, which includes a linear motion cylinder, a guide rail assembly, and a translation plate; The upper surface of the base plate is provided with a guide rail assembly along its length direction, the translation plate is arranged on the guide rail assembly through a guide rail pair and is translated along the guide rail assembly, the output end of the linear motion cylinder is connected to the bottom of the translation plate, the upper surface of the translation plate is fixedly mounted with the lower surface of the lower mold, the lower convex air path pipe passes through the corresponding avoidance hole of the translation plate and is exposed downward, the lower convex air path pipe is used to connect to an external air path detection module, and the external air path detection module is used to perform vacuuming and detect air pressure values; The output end of the press-fitting cylinder is connected to a lower pressing plate, the lower surface of the pressing plate is fixedly connected to the upper surface of the upper mold, and the automobile wiring harness to be tested is placed in the wire groove in the air path detection state. After the upper mold is pressed down and tightly against the upper surface of the sealing ring, the air path detection module is pneumatically operated.

2. The air tightness testing device for automobile wiring harness according to claim 1, characterized in that: The wire placement slots include wire body placement slots and connector placement slots, and all connector placement slots and wire body placement slots are connected.

3. The air tightness testing device for automobile wiring harness according to claim 1, characterized in that: Linear bearings are respectively provided at the four corners of the pressing plate, and guide rods are provided at the positions of the top plate and the bottom plate corresponding to the linear bearings.

4. The air tightness testing device for automobile wiring harness according to claim 1, characterized in that: The length direction of the bottom plate is greater than the length of the top plate, and one end of the bottom plate in the length direction is used for placing the lower mold with an unobstructed upper end.

5. The air tightness testing device for automobile wiring harness according to claim 4, characterized in that: The cylinder seat of the linear motion cylinder is fixed to the other end of the base plate in the length direction through the cylinder body mounting seat. When the piston rod of the linear motion cylinder is in a retracted state, the lower mold is located directly below the upper mold and is in the detection position. When the piston rod of the linear motion cylinder is in an extended state, the lower mold is located at the loading position, so that the wiring harness to be tested is conveniently placed in the wire placement groove of the lower mold.

6. The air tightness testing device for automobile wiring harness according to claim 5, characterized in that: The guide rail assembly includes a pad and guide rails on both sides. Corresponding guide rails are set on both sides of the pad in the width direction, and the length of the guide rails covers the detection station and the loading station.

7. The air tightness testing device for automobile wiring harness according to claim 6, characterized in that: The exposed portion of the downwardly convex air pipe is located outside the pad in the width direction.

8. The air tightness testing device for automobile wiring harness according to claim 1, characterized in that: A plurality of foot pads are arranged at the bottom of the base plate.

9. The air tightness testing device for automobile wiring harness according to claim 1, characterized in that: Sensing devices are installed at the feed port positions of the two side plates corresponding to the lower mold. After the sensing device senses that the lower mold has moved and is securely placed directly under the upper mold, the sensing device notifies the operator to perform the lower mold closing action and subsequent airtightness detection.

Images