Wire harness airtightness detection fixture

Abstract

The utility model discloses a harness airtightness detection fixture relates to jig technical field, the utility model discloses a base and the base top of setting a plurality of jig module, the jig module includes detachable connection to the base top of base, sets up the upper die and lower die of base top, the lower die detachable connection to the base top, the upper die square along vertical direction swing joint to the upper side of lower die, the lower die top is provided with the work station for accommodating product, and the upper die bottom is provided with the recess that cooperates with work station, the recess and work station intercommunication form detection cavity, one side of lower die is connected with the gas pipe joint, the inside wall on work station is provided with the air hole that communicates with gas pipe joint, and the side wall that work station is away from air hole is provided with the accommodation slot that supplies harness to pass, through the cooperation of upper die and lower die, the precision of airtightness detection is guaranteed, through detachable connection, the application range of jig is expanded.

Description

Technical Field

[0001] This utility model relates to a fixture, and more specifically, to a fixture for testing the airtightness of wire harnesses. Background Technology

[0002] As a crucial carrier of electrical energy and signal transmission in electrical equipment, the airtightness of wire harnesses directly affects the reliability and safety of the equipment in harsh environments such as humid and dusty conditions. Therefore, airtightness testing of the joints during wire harness production is one of the key steps in ensuring product quality.

[0003] Existing wire harness airtightness testing fixtures mostly adopt a fixed structure, and the position of their testing modules is usually not adjustable, making it difficult to adapt to the testing needs of wire harnesses of different lengths and specifications. In addition, traditional fixtures often rely on external compression or simple fitting for sealing, which can easily lead to distorted test results due to wire harness misalignment or incomplete sealing.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a wire harness airtightness testing fixture.

[0006] The technical solution of this utility model is: A wire harness airtightness testing fixture includes a base and several fixture modules disposed on the top of the base. Each fixture module includes a base platform detachably connected to the top of the base, an upper mold and a lower mold disposed on the top of the base platform. The lower mold is detachably connected to the top of the base platform. The upper mold is vertically movably connected above the lower mold. The top of the lower mold has a workstation for accommodating the product. The bottom of the upper mold has a recess that mates with the workstation. The recess communicates with the workstation to form a testing cavity. One side of the lower mold is connected to an air pipe connector. The inner side wall of the workstation has a vent hole that communicates with the air pipe connector. The side wall of the workstation opposite to the vent hole has a clearance groove for the wire harness to pass through.

[0007] The present invention is further configured such that a sealing groove is provided on the top of the lower mold, which is arranged around the work station and cooperates with the end seal of the wire harness, and the sealing groove communicates with the recess.

[0008] The present invention is further configured such that the relief groove is open along the axial direction, and the open part is provided with a limiting member. The limiting member is made of plastic material and has a clamping groove for clamping the outer peripheral wall of the wire harness.

[0009] The present invention is further configured such that a support frame is fixedly connected to the top of the base on one side of the lower mold, a support plate is fixedly connected to the top of the support frame by bolts, a cylinder is fixedly connected to the top of the support plate, the drive end of the cylinder passes through the support plate and is connected to the lower pressure plate, and the upper mold is fixedly connected to the bottom of the lower pressure plate by bolts.

[0010] The present invention is further configured such that symmetrically arranged guide columns are provided between the support plate and the base, the guide columns pass through the lower pressure plate, and a guide sleeve that slides with the guide columns is fixedly connected to the lower pressure plate.

[0011] The present invention is further configured such that a positioning rail is fixedly connected to the top of the base along its length, and a positioning groove is provided at the bottom of the base to slide in cooperation with the positioning rail.

[0012] The present invention is further configured such that countersunk holes are provided at all four corners of the lower mold, and a positioning threaded hole communicating with the countersunk holes is provided on the top of the base. The lower mold is fixedly connected to the base by positioning bolts and countersunk holes.

[0013] The present invention is further configured such that the base has a plurality of countersunk holes arranged in an array, and the top of the base has a plurality of fixing holes arranged in an array along its length direction, and the bolts pass through the countersunk holes and are threadedly connected to the fixing holes.

[0014] The present invention is further configured such that a mounting hole is provided on the side of the upper mold away from the recess, and the mounting hole coincides with the central axis of the positioning threaded hole.

[0015] The beneficial technical effects of this utility model are: By detachably connecting several bases to the base, the spacing between two adjacent fixture modules can be adjusted to accommodate wire harnesses of different specifications. The lower mold can also be detachably connected to the top of the base, and the angle of the lower mold can be adjusted so that two adjacent lower molds can be mirrored or arrayed to accommodate wire harnesses of different specifications, thus expanding the applicability of the overall fixture. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a structural schematic diagram from another perspective of the present invention.

[0017] In the diagram, 1 is the base; 11 is the positioning rail; 2 is the platform; 21 is the guide post; 22 is the guide sleeve; 23 is the countersunk hole; 3 is the upper mold; 31 is the recess; 4 is the lower mold; 41 is the work station; 42 is the air pipe connector; 43 is the sealing groove; 44 is the clearance groove; 5 is the limiting component; 51 is the clamping groove; 6 is the support frame; 61 is the support plate; 611 is the cylinder; and 612 is the lower pressure plate. Detailed Implementation

[0018] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0019] A wire harness airtightness testing fixture, such as Figures 1-3 As shown, the device includes a base 1 and several fixture modules disposed on the top of the base 1. Each fixture module includes a base 2 detachably connected to the top of the base 1, an upper mold 3 and a lower mold 4 disposed on the top of the base 2. The lower mold 4 is detachably connected to the top of the base 2 by bolts. The upper mold 3 is vertically connected to the upper part of the lower mold 4. The top of the lower mold 4 has a workstation 41 for accommodating products. The bottom of the upper mold 3 has a recess 31 that mates with the workstation 41. The recess 31 communicates with the workstation 41 to form a testing chamber. One side of the lower mold 4 is connected to an air pipe connector 42. The inner side wall of the workstation 41 has a vent hole that communicates with the air pipe connector 42. The side wall of the workstation 41 away from the vent hole has a clearance groove 44 for wire harnesses to pass through. The lower mold 4 has a sealing groove 43 on its top. The station 41 is located inside the sealing groove 43. The sealing groove 43 communicates with the recess 31. The end of the wire harness is provided with a sealing element that mates with the sealing groove 43. When the end of the wire harness is flipped into the sealing groove 43, the wire harness terminal is accommodated in the station 41. The sealing element fits into the sealing groove 43, and the upper half of the sealing element extends out of the sealing groove 43. After the upper mold 3 is pressed down, the upper half of the sealing element is located in the recess 31 and abuts against the bottom wall of the recess 31. The sealing component completes the sealing of the entire detection chamber, thereby ensuring the accuracy of the airtightness test; the relief groove 44 is open along the axis and its open part is provided with a limiting component 5. The limiting component 5 is made of plastic material and has a clamping groove 51 for clamping the outer peripheral wall of the wire harness. The wire harness is placed in the relief groove 44 and extends into the clamping groove 51. The clamping groove 51 is used to stabilize the wire harness in the corresponding position and prevent the wire harness from tilting up when the upper mold 3 is pressed down, which would affect the overall detection accuracy. A support frame 6 is fixedly connected to the top of the base 2 on one side of the lower mold 4. A support plate 61 is fixedly connected to the top of the support frame 6 by bolts. A cylinder 611 is fixedly connected to the top of the support plate 61. A lower pressure plate 612 is set through the channel end of the cylinder 611 through the support plate 61. The upper mold 3 is fixedly connected to the bottom of the lower pressure plate 612 by bolts. The cylinder 611 drives the lower pressure plate 612 to press down, causing the upper mold 3 to approach the lower mold 4, thus completing the pressing of the product. There are guide columns 21 symmetrically arranged between the support plate 61 and the base 2. The guide columns 21 pass through the lower pressure plate 612. A guide sleeve 22 that slides with the guide column 21 is fixedly connected to the lower pressure plate 612 by bolts. The setting of the guide column 21 ensures the guiding effect of the lower pressure plate 612, restricts the movement trajectory of the lower pressure plate 612, and makes the movement of the lower pressure plate 612 more stable. A positioning rail 11 is fixedly connected to the top of the base 1 along its length. A positioning groove is provided at the bottom of the base 2 to slide with the positioning rail 11. The positioning rail 11 ensures the corresponding positions of adjacent bases 2. When airtightness testing of the wire harness ends is required, two fixture modules are used, with adjacent fixture modules mirror-imaged. The terminals at both ends of the wire harness can be placed into the testing chambers of the fixture modules to complete the testing. The positioning rail 11 and positioning groove ensure the symmetry of the two fixture modules, thereby ensuring the symmetry of the testing chambers within the two fixture modules. The base 2 is detachably mounted on the top of the base 1, allowing control of the spacing between adjacent fixture modules. This accommodates wire harnesses of different specifications and prevents bending of the wire harness, which could affect its performance. Quality inspection: The lower mold 4 has countersunk holes arranged in an array at its four corners. The base 2 has a positioning threaded hole that communicates with the countersunk holes. The lower mold 4 is fixedly connected to the countersunk holes by positioning bolts. The upper mold 3 has a mounting hole on the side away from the recess 31, which is on the same straight line as the central axis of the positioning threaded groove, ensuring the positioning effect of the upper mold 3 and the lower mold 4, thereby ensuring the inspection accuracy. The base 2 has several waist-shaped countersunk holes 23 arranged in an array. The top of the base 1 has several fixing holes arranged in an array along its length. The fixing holes communicate with the waist-shaped countersunk holes 23. Bolts pass through the waist-shaped countersunk holes 23 and are fixedly connected to the fixing holes, so that the base 2 can be detachably connected to the top of the base 1. The position of the base 2 on the top of the base 1 can be adjusted, thereby improving the applicability of the overall inspection fixture.

[0020] Working principle: When single-end testing of the wire harness is required, multiple fixture modules are set and arrayed on the top of the base 1. During testing, the wire harness end is inverted into the sealing groove 43 of the lower mold 4, and the wire harness terminal is accommodated in the station 41. The seal is in contact with the sealing groove 43, and the upper part of the seal extends out of the sealing groove 43. After the upper mold 3 is pressed down, the upper part of the seal is located in the recess 31 and abuts against the bottom wall of the recess 31. The seal is used to seal the entire testing chamber. The wire harness is placed in the relief groove 44 and extends into the clamping groove 51. The clamping groove 51 is used to stabilize the wire harness in the corresponding position, ensuring the stability of the wire harness placement and thus ensuring the testing accuracy. After the test is completed, the air pipe connector 42 is used to connect to the air tightness testing device for ventilation to complete the entire air tightness test. When it is necessary to test the two ends of the wire harness, the number of fixture modules is set to an even number. When installing the lower mold 4, the lower molds 4 in the two fixture modules are set symmetrically. The two ends of the wire harness are put into the lower mold 4 and the upper mold 3 is pressed down. Then, the airtightness testing device is used for testing, which expands the applicability of the overall testing fixture.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fixture for testing the airtightness of wire harnesses, characterized in that: The device includes a base (1) and several fixture modules disposed on the top of the base (1). Each fixture module includes a base (2) detachably connected to the top of the base (1), an upper mold (3) and a lower mold (4) disposed on the top of the base (2). The lower mold (4) is detachably connected to the top of the base (2). The upper mold (3) is vertically connected to the upper part of the lower mold (4). The top of the lower mold (4) has a workstation (41) for accommodating the product. The bottom of the upper mold (3) has a recess (31) that cooperates with the workstation (41). The recess (31) communicates with the workstation (41) to form a detection cavity. One side of the lower mold (4) is connected to an air pipe connector (42). The inner side wall of the workstation (41) has a vent hole that communicates with the air pipe connector (42). The side wall of the workstation (41) away from the vent hole has a clearance groove (44) for the wire harness to pass through.

2. The wire harness airtightness testing fixture according to claim 1, characterized in that: The lower mold (4) has a sealing groove (43) on its top that surrounds the work station (41) and cooperates with the end seal of the wire harness. The sealing groove (43) is connected to the recess (31).

3. The wire harness airtightness testing fixture according to claim 2, characterized in that: The clearance groove (44) is open along the axial direction, and its open part is provided with a limiting member (5). The limiting member (5) is made of plastic material and has a clamping groove (51) for clamping the outer peripheral wall of the wire harness.

4. The wire harness airtightness testing fixture according to claim 1, characterized in that: The base (2) is fixedly connected to a support frame (6) on one side of the lower mold (4). The support frame (6) is fixedly connected to a support plate (61) by bolts. The support plate (61) is fixedly connected to a cylinder (611). The driving end of the cylinder (611) passes through the support plate (61) and is connected to a lower pressure plate (612). The upper mold (3) is fixedly connected to the bottom of the lower pressure plate (612) by bolts.

5. The wire harness airtightness testing fixture according to claim 4, characterized in that: The support plate (61) and the base (2) are provided with symmetrically arranged guide columns (21), the guide columns (21) pass through the lower pressure plate (612), and the lower pressure plate (612) is fixedly connected with a guide sleeve (22) that slides with the guide column (21).

6. The wire harness airtightness testing fixture according to claim 1, characterized in that: The base (1) is fixedly connected to a positioning rail (11) arranged along its length direction at the top, and the base (2) is provided with a positioning groove at the bottom that slides with the positioning rail (11).

7. The wire harness airtightness testing fixture according to claim 1, characterized in that: The lower mold (4) has countersunk holes at all four corners, and the base (2) has a positioning threaded hole at the top that communicates with the countersunk holes. The lower mold (4) is fixedly connected to the base (2) by positioning bolts and countersunk holes.

8. The wire harness airtightness testing fixture according to claim 1, characterized in that: The base (2) has several arrayed countersunk holes (23), and the top of the base (1) has several fixing holes arranged in an array along its length. Bolts pass through the countersunk holes (23) and are threadedly connected to the fixing holes.

9. The wire harness airtightness testing fixture according to claim 1, characterized in that: The upper mold (3) has a mounting hole on the side opposite to the recess (31), and the mounting hole coincides with the central axis of the positioning threaded hole.

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