Wire harness air tightness detection device

Abstract

The utility model discloses a wire harness air tightness detection device, and the device comprises a bearing seat which is provided with a first combination block and a second combination block which are arranged in a relative movement manner, and the first combination block and the second combination block form an accommodation cavity when in a combination state; and the flexible cavity is arranged in the containing cavity, a through opening is formed in one side of the flexible cavity, the through opening communicates with the exterior of the bearing seat, the through opening is provided with connecting points with the first combination block and the second combination block in the circumferential direction, and the first combination block is provided with an air inlet communicating with the interior of the flexible cavity. According to the invention, the flexible cavity is used as an air tightness detection space of the integrated wire harness, the bearing seat is provided with the first combination block and the second combination block which are of a split structure, and the first combination block and the second combination block open the passing opening of the flexible cavity through relative movement. Therefore, the integrated wire harness has a larger passing space and can be smoothly placed into the flexible cavity for air tightness inspection.

Description

Technical Field

[0001] This application relates to the field of airtightness testing equipment technology, and in particular to a wire harness airtightness testing device. Background Technology

[0002] For integrated wire harnesses operating under harsh conditions or in important locations, they usually need to undergo airtightness testing and be put into use only after meeting the airtightness requirements. Current airtightness testing equipment mostly requires the integrated wire harness to be inserted into the wire hole for testing. Since the structure of integrated wire harnesses is often quite complex, containing multiple wires and OT terminals of the cable tie machine, it is difficult to insert them directly into the wire hole. Instead, each wire needs to be combed and passed through the seal, which is complicated. At the same time, the wire harness is also very easy to collide with the rigid edge of the wire hole, causing damage to the wire harness or even directly affecting the airtightness of the wire harness.

[0003] Therefore, how to improve the ease of operation and safety of the integrated wire harness airtightness inspection process is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a wire harness airtightness testing device to improve the ease of operation and safety of the integrated wire harness airtightness inspection process.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A wire harness airtightness testing device, comprising:

[0007] The support has a first assembly block and a second assembly block that are relatively movable, and the first assembly block and the second assembly block form an accommodating cavity when they are in an assembled state.

[0008] A flexible cavity is disposed within the receiving cavity. A passage is opened on one side of the flexible cavity, and the passage is connected to the outside of the support. The passage has connection points with both the first assembly block and the second assembly block in its circumferential direction, and the first assembly block has an air inlet that connects to the interior of the flexible cavity.

[0009] Preferably, in the above-mentioned wire harness airtightness testing device, the joint between the first assembly block and the second assembly block at the passage opening position bisects the passage opening.

[0010] Preferably, the above-mentioned wire harness airtightness testing device further includes a connecting pad, which is fixedly connected to the through port and extends away from the center of the through port;

[0011] The connecting pad is attached to the first assembly block, the connecting pad is attached to the second assembly block, and the connecting pad allows the connecting point to pass through and be fixed.

[0012] Preferably, in the above-mentioned wire harness airtightness testing device, the volume of the first assembly block is larger than that of the second assembly block, and the first assembly block is fixedly installed; the height of the second assembly block in the axial direction of the flexible cavity is smaller than that of the flexible cavity.

[0013] Preferably, in the above-mentioned wire harness air tightness testing device, both the first assembly block and the second assembly block are provided with the air inlet.

[0014] Preferably, in the above-mentioned wire harness airtightness testing device, the second assembly block is slidably engaged with the first assembly block;

[0015] The sliding surface of the second assembly block is provided with a sliding block, and the mating surface of the first assembly block is provided with a slide rail along the sliding direction of the second assembly block, and the sliding block is embedded in the slide rail.

[0016] Preferably, in the above-mentioned wire harness airtightness testing device, the flexible cavity is a variable cross-section structure along the axial direction, and the through port is the minimum cross-sectional area along the axial direction of the flexible cavity.

[0017] Preferably, in the above-mentioned wire harness airtightness testing device, the flexible cavity is a trumpet-shaped structure with an arc-shaped inner wall.

[0018] Preferably, the above-mentioned wire harness airtightness testing device further includes auxiliary fasteners, and the first assembly block and the second assembly block are respectively fixedly connected to the side wall of the flexible cavity near the through-hole position through the auxiliary fasteners.

[0019] Preferably, in the above-mentioned wire harness airtightness testing device, the first assembly block and the second assembly block have the same structure and are symmetrically arranged about the flexible cavity.

[0020] As can be seen from the above technical solution, the wire harness airtightness testing device provided in this application sets the carrier as a split structure of a first assembly block and a second assembly block, so that the relative positions of the first assembly block and the second assembly block can change. When the first assembly block and the second assembly block are in the assembled state, their interiors cooperate to form a receiving cavity structure. The flexible cavity is used to provide space for wire harness airtightness testing. In particular, the flexible cavity is open on one side and is disposed in the receiving cavity. The through-hole on one side of the flexible cavity connects to the outside of the carrier to allow the wire harness to pass through. At the same time, the through-hole has connection points with the first assembly block and the second assembly block in the circumferential direction, so that when the positions of the first assembly block and the second assembly block change, The structure can change the opening of the flexible passage, allowing adjustment of the hole size in the wire harness passage area. The operator can also adjust the size of the passage by adjusting the relative movement of the first and second assembly blocks when inserting the wire harness into the flexible cavity, thus reducing the difficulty of insertion. Furthermore, at least one of the first and second assembly blocks has an air inlet that connects from the outer wall of the support to the interior of the flexible cavity, allowing for air inflation to test the airtightness of the wire harness. This structure is simple to operate and allows for changing the size of the passage, meeting the requirements for wire harness insertion and sealing during testing, reducing the risk of wire harness damage, and improving the ease of operation and safety of the wire harness airtightness inspection process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the wire harness airtightness testing device provided in this disclosure;

[0023] Figure 2 This is a schematic diagram of the assembly of a wire harness airtightness testing device.

[0024] Figure 3 This is a schematic cross-sectional view of the wire harness airtightness testing device.

[0025] Figure 4 This is a schematic diagram of the side structure of the support.

[0026] Wherein, 10-bearing seat; 110-first assembly block; 1110-dating surface; 1120-slide rail; 120-second assembly block; 1210-sliding surface; 130-air inlet; 140-accommodating cavity; 20-flexible cavity; 210-through port; 220-connecting pad; 30-connection point; 40-auxiliary fastener. Detailed Implementation

[0027] The core of this application is to disclose a wire harness airtightness testing device to improve the ease of operation and safety of the integrated wire harness airtightness inspection process.

[0028] To enable those skilled in the art to better understand the present application, embodiments of the present application will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model described in the claims. Additionally, the complete content of the structures represented in the following embodiments is not limited to those necessary for the solution of the utility model described in the claims.

[0029] like Figure 1 and Figure 3 As shown, this disclosure provides a wire harness airtightness testing device, which mainly includes a support base 10 and a flexible cavity 20. The support base 10 includes a first assembly block 110 and a second assembly block 120, and the first assembly block 110 and the second assembly block 120 are movable relative to each other, specifically, the distance between them can change. When the first assembly block 110 and the second assembly block 120 are in an assembled state, their interiors cooperate to form a receiving cavity 140 structure; here, the assembled state refers to the state in which the first assembly block 110 and the second assembly block 120 are in close contact.

[0030] And such Figure 4 As shown, the accommodating cavity 140 is a cavity structure for placing the flexible cavity 20. The accommodating cavity 140 can be a single-sided opening structure, while the flexible cavity 20 is a single-sided opening cavity structure made of rubber. It is used for inserting wire harnesses for airtightness testing. Specifically, the flexible cavity 20 has a through port 210, which connects to the outside of the carrier 10. The wire harness passes through the through port 210 from the outside of the carrier 10 to be inserted into the interior of the flexible cavity 20 for airtightness testing. It should be noted that the wire harness is placed inside the flexible cavity 20 for airtightness testing, while the accommodating cavity 140 for the flexible cavity 20 can have only one opening. The opening 210 mates with the single opening of the accommodating cavity 140, and the other parts of the flexible cavity 20 are all located inside the accommodating cavity 140 for enclosure and protection. At the same time, the accommodating cavity 140 can also have multiple openings, and the opening 210 can mate with any of the openings on the accommodating cavity 140, so that the openings of the flexible cavity 20 can be in different states to meet the airtightness testing requirements under different working conditions.

[0031] Based on the above structure, the through-hole 210 on the flexible cavity 20 has a connection point 30 fixed to the first combined block 110 and the second combined block 120 in its circumferential direction. When the first combined block 110 and the second combined block 120 move relative to each other and change the distance between them, the flexible cavity 20, by means of its flexible structure, can make the through-hole 210 change its opening size synchronously with the first combined block 110 and the second combined block 120. Based on this, when it is necessary to use the wire harness airtightness testing device provided in this disclosure to perform wire harness airtightness testing, the first combined block 110 and the second combined block 120 can be moved to separate them, and the through-hole 210 will expand synchronously. The experimenter has a large operating space to place the wire harness into the flexible cavity 20. After the wire harness is placed, the first combined block 110 and the second combined block 120 can be adjusted to the combined state so that the through-hole 210 contracts. The smaller opening of the through-hole 210 can be sealed by sealing structures such as sealing gaskets, and maintain the sealing effect of the wire harness in the flexible cavity 20.

[0032] It should be noted that the adjustable opening 210 not only facilitates the insertion of the wire harness, but its flexible opening edge and internal structure also prevent the risk of damage from bumps during placement. Furthermore, an air inlet 130 is provided on the side wall of the first assembly block 110. The two ends of the air inlet 130 are connected to the outside of the support base 10 and the inside of the flexible cavity 20 in the receiving cavity 140, respectively. After the wire harness is successfully inserted into the flexible cavity 20, air is introduced into the flexible cavity 20 through the air inlet 130 to successfully test the airtightness of the wire harness inside the flexible cavity 20. After the airtightness test of the wire harness is completed, the experimenter can separate the first assembly block 110 and the second assembly block 120 to enlarge the opening 210, and then smoothly remove the wire harness to complete the experiment.

[0033] Furthermore, in the wire harness airtightness testing device provided in this disclosure, the smooth opening adjustment of the port 210 is the basis for the smooth insertion of the wire harness. The opening adjustment of the port 210 is based on the movement of the first assembly block 110 and the second assembly block 120. Therefore, to improve the safety of the first assembly block 110 and the second assembly block 120 during the opening adjustment process of the port 210, in some embodiments of this disclosure, the port 210 of the flexible cavity 20 and both the first assembly block 110 and the second assembly block 120 have at least two connection points 30, so that during the opening adjustment process of the port 210, the force on each side can be evenly distributed. By applying force through at least two connection points 30, the uniformity of the force exerted by the first assembly block 110 and the second assembly block 120 on the passage opening 210 is improved. Furthermore, the butt joint of the first assembly block 110 and the second assembly block 120 at the passage opening 210 position is also set to bisect the passage opening 210, and the contact length between the passage opening 210 and the first assembly block 110 and the second assembly block 120 on both sides is equal. At the same time, the connection points 30 on both sides of the butt joint of the first assembly block 110 and the second assembly block 120 at the passage opening 210 position are symmetrically arranged about the butt joint, so as to improve the uniformity of the force on the passage opening 210 during the opening degree change process.

[0034] To further optimize the above technical solution and improve the stability of the flexible cavity 20 during deformation, in some embodiments of this disclosure, the wire harness airtightness detection device further includes an auxiliary fastener 40. Specifically, the first assembly block 110 and the second assembly block 120 are respectively fixedly connected to the side wall of the flexible cavity 20 through the auxiliary fastener 40 to cooperate with the connection point 30, thus avoiding the risk of tearing at the connection point 30 during the deformation process when only a single area of ​​the opening 210 is connected. Similarly, the auxiliary fastener 40 is positioned on the flexible cavity 20 close to the opening 210 to achieve a cooperating and fixing effect with the connection point 30 at the opening 210.

[0035] Based on the above embodiments, such as Figure 2 and Figure 3As shown, the opening 210 can be flush with the accommodating opening, meaning the end of the flexible cavity 20 through the opening 210 is flush with the side wall of the support 10. The flexible cavity 20 is fixedly connected to the first assembly block 110 and the second assembly block 120 by adhesive or lateral screws. In some embodiments of this disclosure, the flexible cavity 20 can also extend out of the accommodating cavity 140 from one side of the opening 210, allowing it to expand circumferentially and fit against the side walls of the surrounding first assembly block 110 and second assembly block 120. In this case, a connecting pad 220 is also provided at the position of the opening 210, extending away from the center of the opening 210. While maintaining the flexible contact effect at the position of the opening 210, the connecting pad 220 can also increase the contact area between the flexible cavity 20 and the first assembly block 110 and the second assembly block 120. The connection point 30 can be a bolt set through the connecting pad 220. The setting of the connecting pad 220 allows the bolt to have more free fixing space and can appropriately increase the number of bolts, so as to improve the stability of the opening adjustment of the opening 210 of the first assembly block 110 and the second assembly block 120 during movement.

[0036] It should be noted that the connecting pad 220 can be set independently and fixed to the through port 210, or it can be directly integrally formed with the through port 210 to maintain a stable opening state when the through port 210 is expanded.

[0037] Furthermore, in the wire harness airtightness testing device provided in this disclosure, the dimensions of the first assembly block 110 and the second assembly block 120 can be the same or different. In some embodiments of this disclosure, the first assembly block 110 and the second assembly block 120 have the same structure and are symmetrically arranged about the flexible cavity 20, so that the opening state of the first assembly block 110 and the second assembly block 120 with respect to the passage 210 is more uniform. At the same time, both the first assembly block 110 and the second assembly block 120 can be provided with an air inlet 130 structure. The first assembly block 110 and the second assembly block 120 with the same structure do not need to distinguish the installation direction, and both have a more convenient production method, thereby reducing the production cost of the wire harness airtightness testing device.

[0038] In other embodiments of this disclosure, the volume of the first assembly block 110 can be larger than that of the second assembly block 120. The larger first assembly block 110 can be fixedly mounted on the ground or a workbench, serving as a fixed reference for the experimental operation and improving the stability of the wire harness airtightness testing device during use. The smaller second assembly block 120 can be manually operated by the experimenter to change its position relative to the first assembly block 110, thereby adjusting the opening of the passage 210. It should be noted that for the first assembly block 110 and the second assembly block 120 with different volumes, the manually operated second assembly block 120 can also be equipped with a handle or other structure to improve the convenience of manual operation.

[0039] Based on the above embodiments, for structures where the volume of the first assembly block 110 is larger than that of the second assembly block 120, the second assembly block 120 can slide with the first assembly block 110. This sliding engagement limits the movement direction of the second assembly block 120 relative to the first assembly block 110, improving the regularity and uniformity of force distribution during the opening adjustment process of the port 210. Simultaneously, to reduce the manufacturing difficulty and cost of the wire harness airtightness testing device, the air inlet 130 only needs to be installed on the side wall of the first assembly block 110. With the fixed installation structure of the first assembly block 110, the relative movement distance between the first assembly block 110 and the side wall of the flexible cavity 20 is smaller during the opening adjustment process of the port 210, thus making it easier to ensure the airtightness of the air inlet 130.

[0040] To further optimize the above technical solution, in some embodiments of this disclosure, in the axial direction of the flexible cavity 20, the height of the second assembly block 120 is less than the height of the flexible cavity 20. When the through port 210 is fixedly connected to both the first assembly block 110 and the second assembly block 120 and located on the side wall of the support seat 10, the end of the flexible cavity 20 away from the through port 210, i.e., its closed end, is entirely located inside the first assembly block 110 and will not come into contact with the second assembly block 120. Thus, even if the second assembly block 120 moves and causes the through port 210 to change its opening, the flexible cavity 20, which is stably set at the bottom, can still maintain a stable state, and only the opening of the through port 210 will change significantly, reducing the risk of deformation damage to the flexible cavity 20. At the same time, it can also avoid the risk of leakage at the air inlet 130 due to the deformation of the flexible cavity 20.

[0041] It should be noted that the sliding fit structure of the first assembly block 110 and the second assembly block 120 can adopt a commonly used concave-convex sliding fit structure. In some embodiments of this disclosure, the second assembly block 120 includes a sliding surface 1210 that contacts the first assembly block 110, and a slider is provided on the sliding surface 1210. The first assembly block 110 includes a mating surface 1110 that contacts and fits with the sliding surface 1210, and a slide rail 1120 is provided on the mating surface 1110. The slide rail 1120 is set along the sliding direction of the second assembly block 120 relative to the first assembly block 110, and the slider is embedded in the slide rail 1120 on the first assembly block 110. During the sliding operation of the second assembly block 120 relative to the first assembly block 110 to adjust the opening of the orifice 210, the sliding block can be limited and guided by the slide rail 1120, thereby improving the regularity of the movement of the second assembly block 120, reducing the risk of the flexible cavity 20 being damaged by oblique stretching due to the skewed operation of the second assembly block 120, and improving the stability of the wire harness airtightness detection device.

[0042] Furthermore, since integrated wire harnesses typically have a rather messy volume and require significant space during testing, the wire harness airtightness testing device provided in this embodiment has a flexible cavity 20 with a variable cross-section along its axial direction. During airtightness testing, the through-port 210 of the flexible cavity 20 represents its smallest cross-sectional area along its axial direction. After the wire harness enters the flexible cavity 20 through the through-port 210, it gains a larger internal space. The through-port 210, representing the smallest cross-sectional area, allows for easy insertion of the wire harness by adjusting its opening. This larger internal space reduces the risk of compression and collision, improving the safety of the wire harness during airtightness testing.

[0043] It should also be noted that the accommodating cavity 140 is also a variable cross-section structure adapted to the outer wall structure of the flexible cavity 20, so that the flexible cavity 20 can be in an unfolded state without being compressed and causing deformation of its spatial structure.

[0044] Furthermore, to reduce the risk of the wire harness bumping against the inner wall of the flexible cavity 20, in some embodiments of this disclosure, the inner wall of the flexible cavity 20 has an arc-shaped structure, that is, the flexible cavity 20 is a trumpet-shaped structure with one end open and the other end closed. The arc-shaped structure of the inner wall of the flexible cavity 20 does not have sharp edges, thereby reducing the risk of damage to the wire harness during the insertion process and the airtightness test.

[0045] The terms "first," "second," "left side," and "right side," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units may not be defined in the listed steps or units, but may include steps or units not listed.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wire harness airtightness testing device, characterized in that, include: The support (10) has a first assembly block (110) and a second assembly block (120) that are relatively movable, and the first assembly block (110) and the second assembly block (120) form an accommodating cavity (140) when they are in the combined state. A flexible cavity (20) is disposed within the accommodating cavity (140). The flexible cavity (20) has a passage opening (210) on one side, which connects to the outside of the support seat (10). The passage opening (210) has a connection point (30) with both the first assembly block (110) and the second assembly block (120) in its circumferential direction. The first assembly block (110) has an air inlet (130) that connects to the interior of the flexible cavity (20).

2. The wire harness airtightness testing device as described in claim 1, characterized in that, The first assembly block (110) and the second assembly block (120) bisect the passage (210) at the joint where they meet.

3. The wire harness airtightness testing device as described in claim 2, characterized in that, It also includes a connecting pad (220) which is fixedly connected to the passage (210) and extends in a direction away from the center of the passage (210); The connecting pad (220) is attached to the first assembly block (110), the connecting pad (220) is attached to the second assembly block (120), and the connecting pad (220) allows the connecting point (30) to pass through and be fixed.

4. The wire harness airtightness testing device as described in claim 1, characterized in that, The volume of the first assembly block (110) is larger than that of the second assembly block (120), and the first assembly block (110) is fixedly installed; the height of the second assembly block (120) in the axial direction of the flexible cavity (20) is smaller than that of the flexible cavity (20).

5. The wire harness airtightness testing device as described in claim 1, characterized in that, The first assembly block (110) and the second assembly block (120) are both provided with the air inlet (130).

6. The wire harness airtightness testing device as described in claim 1, characterized in that, The second assembly block (120) is in sliding engagement with the first assembly block (110); A sliding block is provided on the sliding surface (1210) of the second assembly block (120), and a slide rail (1120) is provided on the mating surface (1110) of the first assembly block (110) along the sliding direction of the second assembly block (120), and the sliding block is embedded in the slide rail (1120).

7. The wire harness airtightness testing device as described in claim 1, characterized in that, The flexible cavity (20) is a variable cross-section structure along the axial direction, and the through-hole (210) is the minimum cross-sectional area of ​​the flexible cavity (20) along the axial direction.

8. The wire harness airtightness testing device as described in claim 7, characterized in that, The flexible cavity (20) is a trumpet-shaped structure with an arc-shaped inner wall.

9. The wire harness airtightness testing device as described in claim 1, characterized in that, It also includes auxiliary fasteners (40), the first assembly block (110) and the second assembly block (120) are respectively fixedly connected to the side wall of the flexible cavity (20) near the passage (210) by the auxiliary fasteners (40).

10. The wire harness airtightness testing device as described in claim 1, characterized in that, The first assembly block (110) has the same structure as the second assembly block (120) and is symmetrically arranged about the flexible cavity (20).

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