Air tightness testing device for sleeve and via hole seal of automobile cable
By designing a simplified airtightness testing device and utilizing a sealing cylinder and plug needle structure, the complexity of airtightness testing of the center hole and sleeve of automotive cable through-hole seals was solved, achieving efficient and accurate airtightness testing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO AUTO CABLE CONTROLS
- Filing Date
- 2025-08-25
- Publication Date
- 2026-07-28
AI Technical Summary
In existing technologies, the airtightness testing of the central hole and sleeve of the through-hole seal of automotive cables is not very targeted, and the testing device has a complex structure and is cumbersome to operate.
An airtightness testing device was designed, comprising a control box, a power switch, and a workbench. It utilizes a sealing cylinder, a pressure gauge, a plug needle, and a clamping and straightening structure. The device is fixed to the existing structure of the sleeve through a through-hole seal, simplifying the clamping and testing process. A cylinder drives the plug needle to seal the through hole of the cable core, and the airtightness is tested by gas pressure.
It achieves efficient and accurate airtightness testing of the center hole of automotive cable sleeves and through-hole seals. The device has a simple structure, is easy and quick to operate, and provides intuitive and accurate test results.
Smart Images
Figure CN224568449U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive cable manufacturing technology, specifically to an airtightness testing device for the sleeve and through-hole seal of an automotive cable. Background Technology
[0002] There are many types of automotive cables, each with varying quality requirements. For example, one type of automotive cable has a first connector and a second connector fixed at both ends of the sleeve. A through-hole seal, such as a rubber seal, is interference-fitted into the middle section of the sleeve. The outer diameter of the through-hole seal is much larger than the outer diameter of the sleeve. The outer end of the through-hole seal is shaped like a semi-circular swimming ring, with a sealing sleeve connected to its center. This sealing sleeve is fixed to the sleeve of the automotive cable with an interference fit and provides a seal. The inner end of the through-hole seal has an axially convex ring, which is used to interference fit and seal a circular through-hole in a rigid material such as a steel plate. Automotive manufacturers have high requirements for the airtightness between the sealing sleeve at the center of the through-hole seal and the sleeve in automotive cables. Before assembling the cable core, such as the steel wire rope, inside the sleeve, the airtightness between the central hole of the through-hole seal and the sleeve must be tested for each sleeve.
[0003] However, existing hose airtightness testing devices are not very targeted at testing the airtightness of the central hole of the through-hole seal and the hose. The structure for fixing the sleeve is relatively complex, the structure of the testing device itself is also relatively complex, and the airtightness testing operation is relatively cumbersome. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide an airtightness testing device for the sleeve and through-hole seal of automobile cables, which is highly targeted, has a relatively simple clamping structure, a relatively simple device structure, and is relatively easy to operate.
[0005] The technical solution of this utility model is to provide an airtightness testing device for the sleeve and through-hole seal of an automotive cable, including a control box, a power switch and a workbench, and a horizontal sealing cylinder fixed on the workbench by a support. The sealing cylinder is equipped with a pressure gauge, one end of the sealing cylinder has an air inlet, and the other end of the sealing cylinder has a radial convex ring for the sleeve and the first connector located at one end of the through-hole seal to enter and exit, and to press against and seal the through-hole seal. The workbench also has a clamping and straightening structure for clamping the second connector located at the other end of the through-hole seal and for straightening the sleeve located at the other end of the through-hole seal. The clamping and straightening structure is also equipped with a plugging needle driven by a horizontal cylinder for sealing the through hole of the second connector cable core.
[0006] With the above structure, the airtightness testing device for the sleeve and through-hole seal of the automobile cable of this utility model has the following advantages: it is highly targeted and practical. This device is specifically designed for airtightness testing between the central hole of the sleeve and the through-hole seal of the automobile cable. Both ends are fixed using the existing structure of the second connector of the automobile cable sleeve and the through-hole seal. The fixing structure is relatively simple, and the overall structure of the testing device itself is also relatively simple. The operation is also relatively convenient and quick. For example, it is only necessary to expand the axial inner convex ring of the through-hole seal into the radial convex ring, and fix the second connector downward. Start the cylinder to seal the cable core through hole with the plug needle, and then inject gas at a predetermined pressure so that the pressure gauge of the sealing cylinder reaches the specified air pressure value, such as 2-2.6 MPa. After pausing for a predetermined time, such as 3-5 seconds, if the pressure gauge value does not drop, it is qualified; otherwise, it is unqualified. The test results are accurate and intuitive.
[0007] Furthermore, the clamping and straightening structure with a plugging needle includes a slide block that slides on a longitudinal guide rail fixed to the worktable. The slide block and the longitudinal guide rail have a first positioning structure that positions the slide block at any longitudinal position. A support plate is located at the top of the slide block, and a locking block is located at the end of the support plate near the sealing cylinder. The locking block has a vertical notch for the annular groove of the second connector to engage. A horizontal cylinder is fixed at the end of the support plate near the sealing cylinder, and the plugging needle is fixed at the center of the free end face of the piston rod of the horizontal cylinder. With the above specific structure, the clamping and straightening structure with a plugging needle can perform both sealing and straightening functions in one set. Furthermore, the locking groove utilizes the existing annular groove of the second connector for clamping, further ensuring a highly targeted, simple, and convenient technical effect.
[0008] Furthermore, the horizontal cylinder has three parallel piston rods. The front ends of these three piston rods are all fixed to a rectangular slider that slides onto a support plate. A circular plug seat is fixed at the center of the rectangular slider. The end of the circular plug seat near the second connector has a circular blind hole that fits into the outer end of the second connector. A conical plug, smaller at the outer end and larger at the inner end, is fixed to the center of the inner wall of the circular blind hole. This cylinder structure significantly improves the accuracy, reliability, and tightness of the plug's sealing of the second connector's through-hole, further enhancing the accuracy of the detection.
[0009] Furthermore, the support plate has a transverse groove at one end near the sealing cylinder, and the bottom of the locking block slides within the transverse groove. The support plate and the locking block have a second positioning structure that allows the locking block to be positioned at any transverse position within the transverse groove. With this structure, in addition to longitudinal straightening and adjustment, transverse adjustment is also possible, further improving the accuracy and tightness of the plugging of the second connector cable core through-hole, and further enhancing the accuracy of the detection.
[0010] Furthermore, there are two supports, both vertical plates. The bottom of each vertical plate is fixed to the workbench plate. Each vertical plate has fixing holes at its upper part for fitting sealing cylinders. Both ends of the sealing cylinders, fitted into the two fixing holes, are fixed to the vertical plates. The outer end of the sealing cylinder has a circular plug with an air inlet. The circular plug has external threads that engage with the internal threads of the outer end of the sealing cylinder. A first flexible sealing ring is located between the circular plug and the outer end face of the sealing cylinder. The inner end of the sealing cylinder has an annular sealing head that engages with the internal threads of the inner end of the sealing cylinder. The external thread and the second flexible sealing ring are located between the annular sealing head and the inner end face of the sealing cylinder. The radial convex ring has the following structure: a circular steel plate with a central hole is fixed to the end face of the annular sealing head near the plug needle; a third flexible sealing ring is located between the circular steel plate and the annular sealing head; the inner hole of the annular sealing head and the central hole of the circular steel plate together form a through hole for the sleeve and the first connector located at one end of the through-hole seal to enter and exit; the axially convex elastic ring on the outer circle of the through-hole seal is interference-fitted with the central hole of the circular steel plate and seals. With the above structure, the sealing cylinder is easier to install and the sealing performance is better. The circular steel plate with the central hole utilizes the existing axially convex ring of the through-hole seal to interference-fit and seal with the through-hole seal, further ensuring the technical effect of strong targeting, simple structure, and convenient operation, and further improving the accuracy of testing the airtightness between the sleeve and the through-hole seal of the automotive cable. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of the preferred embodiment of the airtightness testing device of this utility model, which includes a pre-installed cable. Figure 1 .
[0012] Figure 2 yes Figure 1 A magnified structural diagram of A in the diagram.
[0013] Figure 3 This is a schematic diagram of the structure of the preferred embodiment of the airtightness testing device of this utility model, which includes a pre-installed cable. Figure 2 (Several vertical spaces are omitted to show part of the platform, and the power switch is omitted).
[0014] Figure 4 yes Figure 3 A magnified structural diagram of B in the diagram.
[0015] Figure 5 yes Figure 3 A magnified structural diagram of C.
[0016] Figure 6 yes Figure 5 A structural diagram from a different angle.
[0017] Figure 7 yes Figure 4 A schematic diagram of the exploded structure in which some components were exposed. Figure 1-7 (Some screws omitted).
[0018] Figure 8 This is a structural diagram of the car cable that needs to be inspected. Figure 1 .
[0019] Figure 9 This is a structural diagram of the car cable that needs to be inspected. Figure 2 .
[0020] Figure 10 yes Figure 8 A magnified structural diagram of D in the diagram.
[0021] Figure 11 yes Figure 8 A magnified structural diagram of E in the middle.
[0022] Figure 12 yes Figure 9 A magnified structural diagram of F in the middle.
[0023] Figure 13 yes Figure 9 A schematic diagram of the enlarged structure of G.
[0024] As shown in the figure:
[0025] 1. Car cable; 11. Sleeve; 111. First end sleeve; 112. Second end sleeve; 12. First connector; 13. Second connector; 131. Cable core through hole; 132. Annular groove; 14. Protective tube; 15. Through hole seal; 151. Sealing sleeve; 152. Elastic ring.
[0026] 2. Workbench; 21. Tabletop; 211. First longitudinal space; 212. Second longitudinal space; 213. Third longitudinal space; 22. Wall panel;
[0027] 3. Air tightness testing part of the testing device: 31. Sealing cylinder, 311. Pressure gauge, 312. Air inlet, 313. Circular plug, 314. First flexible sealing ring, 315. Second flexible sealing ring, 316. Third flexible sealing ring, 32. Longitudinal guide rail, 33. Slide block, 331. Support plate, 332. Column, 3311. Transverse slide groove, 34. Locking block, 341. Vertical notch, 35. Horizontal cylinder, 351. Piston rod, 352. Rectangular slider, 36. Plug needle seat, 361. Circular blind hole, 37. Plug needle, 38. Vertical plate, 381. Fixing hole, 39. Circular sealing head, 391. Inner hole, 310. Circular steel plate, 3101. Center hole, 3102. Flange;
[0028] 4. Power switch;
[0029] 5. Control box; 51. Display screen. Detailed Implementation
[0030] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions of specific embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various specific embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0031] like Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown.
[0032] The automotive cable 1 to be inspected is, strictly speaking, a semi-finished automotive cable 1 without a core assembly. A first connector 12 and a second connector 13 are fixed to both ends of a sleeve 11. A protective tube 14 can be fitted onto the sleeve near the first connector 12. A through-hole seal 15 is interference-fitted onto the middle section of the sleeve 11. The outer diameter of the through-hole seal 15 is much larger than the outer diameter of the sleeve 11. The outer end of the through-hole seal 15 is shaped like a half-ring, and a sealing sleeve 151 is sealed to the center of the outer end. The sealing sleeve 151 is fixed to the sleeve 11 of the automotive cable 1 with an interference fit and seals. An axially convex elastic ring 152 on the outer circumference of the through-hole seal 15 is used for interference fit or tightening and sealing with through holes in rigid materials such as circular holes in steel plates. The sleeve 11 near the first connector 12 can be called the first end sleeve 111, and the sleeve 11 near the second connector 13 can be called the second end sleeve 112. Automobile manufacturers have high requirements for the airtightness between the sealing sleeve 151 at the center of the through-hole seal 15 and the sleeve 11 of the automobile cable 1. Therefore, before installing the cable core, such as steel wire rope or steel strand, inside the sleeve 11, the airtightness between the sealing sleeve 151 at the center of the through-hole seal 15 and the sleeve 11 of each sleeve 11 must be tested. The through-hole seal 15 is generally made of rubber, but it can also be made of soft plastic. It is easy to understand that the sleeve 11, also called a flexible hose, is not an ordinary flexible hose; it is a flexible hose with interconnected inner bushings or inner strips for increased strength.
[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 Figure 13 As shown.
[0034] A preferred embodiment of the airtightness testing device for the sleeve and through-hole seal of the present invention includes a control box 5, a power switch 4, and a workbench 2. A wall panel 22 and a platform 21 may be installed on the upper part of the workbench. The control box 5 may be located on the workbench 2 above the platform 21. The control box 5 includes a main controller such as a PLC programmable control chip, relays, and other electrical components, as well as a display screen 51. The power switch 4 may include a start button switch and a stop button switch, and may be installed on the platform 21 of the workbench 2. The platform 21 may be divided into multiple longitudinally extending spaces using vertical and horizontal plates at both ends. For example, the first longitudinal space 211 near the operator's side can hold the sleeve to be tested; the second longitudinal space 212 in the middle can have the airtightness testing part 3 of the testing device installed on the platform 21; and the third longitudinal space 213 away from the operator can hold the tested qualified products, while unqualified products can be placed separately.
[0035] A preferred embodiment of the airtightness testing device for the sleeve and through-hole seal of the automotive cable of this utility model further includes a horizontal sealing cylinder 31 fixed on the workbench 2 by a support. The horizontal sealing cylinder 31 is placed longitudinally and is equipped with a pressure gauge 311. One end of the sealing cylinder 31 has an air inlet 312, and the other end of the sealing cylinder 31 has a radial convex ring for the sleeve (also called the first end sleeve 111) and the first connector 12 located at one end of the through-hole seal 15 to enter and exit, and to press against and seal the through-hole seal 15. The workbench 2 also has a clamping and straightening structure for securing the second connector 13 located at the other end of the through-hole seal 15 and for straightening the sleeve (also called the second end sleeve 112) located at the other end of the through-hole seal 15. The clamping and straightening structure is also equipped with a plugging needle 37 driven by a horizontal cylinder 35 for sealing the cable core through hole of the second connector 13. The plugging needle 37 can also be called a push needle.
[0036] The locking and straightening structure with plug 37 includes a slide block 33 that slides on a longitudinal guide rail 32 fixed to the worktable 2. The slide block 33 and the longitudinal guide rail 32 have a first positioning structure that positions the slide block 33 at any longitudinal position. A support plate 331 is located at the top of the slide block 33. The support plate 331 can be fixedly connected to the slide block 33 via four columns 332. A locking block 34 is located at the end of the support plate 331 near the sealing cylinder 31. The locking block 34 has a vertical notch 341 for engaging the annular groove 132 of the second connector 13. It is easy to understand that the locking block 34 can be fixed, for example, by welding to the support plate 331, but it is preferably set via a transverse sliding groove 3311 and a second positioning structure. A horizontal cylinder 35 is fixed, for example, by locking or welding to the end of the support plate 331 near the sealing cylinder 31. The plug 37 is fixed at the center of the free end face of the piston rod 351 of the horizontal cylinder 35.
[0037] The slide 33 and the longitudinal guide rail 32 have a first positioning structure that allows the slide 33 to be positioned at any longitudinal position. A conventional positioning screw can be used, such as one or more threaded holes on the slide, with one or more positioning screws screwed into it. When the longitudinal position of the slide needs to be adjusted, the slide is manually pushed to the predetermined position, and then the positioning screws are tightened and the longitudinal guide rail is pressed to position the slide at any longitudinal position. A locking nut can also be added. Because in actual operation, the slide position only needs to be adjusted and positioned after the length of the sleeve batch is being tested, this adjustment is not very frequent. The first positioning structure described above can basically meet the needs of actual testing.
[0038] A limiting vertical plate can also be provided at one end near the sealing cylinder. The vertical plate has one or more threaded holes, and a screw is screwed into each threaded hole. The front end of the screw reaches the slide. A fastening nut can be provided on each screw. After screwing the screw to move the slide to the predetermined position, tighten the fastening nut, and the slide will be positioned in any longitudinal position.
[0039] Of course, a cylinder can also be fixed at one end of the guide rail or on the platform. The free end of the piston rod of the cylinder is fixed to the slide. When it is necessary to adjust the longitudinal position of the slide, the cylinder is started to drive the slide to the predetermined position and then the cylinder is stopped. Then the slide can be positioned at any longitudinal position.
[0040] The horizontal cylinder 35 may have three parallel piston rods 351. The front ends of the three parallel piston rods 351 may be jointly fixed to a rectangular slider 352 that slides on a support plate 331. A circular plug seat 36 is fixed at the center of the rectangular slider 352. The end of the circular plug seat 36 near the second connector 12 has a circular blind hole 361 that fits the outer end of the second connector 13. A conical plug 37, with a smaller outer end and a larger inner end, is fixed at the center of the inner end wall of the circular blind hole 361, that is, the conical plug 37 is coaxial with the circular blind hole 361. If the top of the cone has a circular end face and is not called a cone but a frustum or truncated cone, the plug 37 may also be called a frustum or truncated cone plug.
[0041] The support plate 331 may have a transverse groove 3311 at one end near the sealing cylinder 31. The bottom of the locking block 34 is slidably fitted in the transverse groove 3311. The support plate 331 and the locking block 34 have a second positioning structure that allows the locking block 34 to be positioned at any transverse position in the transverse groove 3311.
[0042] It is easy to understand that the second positioning structure can be the same as the first two positioning structures mentioned above, except that the second positioning structure is transverse, while the first positioning structure is longitudinal. For example, the second positioning structure can have threaded holes, positioning screws, and locking nuts on the groove plate outside the transverse slide. After manually moving the block to the predetermined transverse position, the positioning screws and locking nuts are tightened. Alternatively, a limiting vertical plate, a screw, and a locking nut can be provided at one end of the transverse slide. The front end of the screw is axially limited by the block but can rotate circumferentially. For example, if there is a circular step at the front end of the screw, and a ring is fixed to the bottom side of the block, the circular step inside the ring limits the block axially but allows it to rotate circumferentially. After screwing the screw to move the block laterally to the predetermined position, the locking nut is tightened to achieve positioning.
[0043] There can be two supports, both of which are vertical plates 38. The bottom of each vertical plate 38 is fixed to the table plate 21 of the workbench 2, such as by welding. Each vertical plate 38 has a fixing hole 381 for fitting a sealing cylinder 31. Both ends of the sealing cylinder 31 fitted into the two fixing holes 381 are fixed to the vertical plate 38 by multiple screws or welding. The outer end of the sealing cylinder 31 has a circular plug 313 with an air inlet 312. The circular plug 313 has an external thread that engages with the internal thread of the outer end of the sealing cylinder 31. There is a first flexible sealing ring 314 between the circular plug 313 and the outer end face of the sealing cylinder 31.
[0044] The inner end of the sealing cylinder 31 has an annular sealing head 39. The annular sealing head 39 has an external thread that engages with the internal thread of the inner end of the sealing cylinder 31. A second flexible sealing ring 315 is located between the annular sealing head 39 and the inner end face of the sealing cylinder 31. The specific structure of the radial convex ring can be as follows: a circular steel plate 310 with a central hole 3101 is fixed to the end face of the annular sealing head 39 near the plug pin 37. A third flexible sealing ring 316 is located between the circular steel plate 310 and the annular sealing head 39. The inner hole 391 of the annular sealing head 39 and the central hole 3101 of the circular steel plate 310 together form a through hole for the sleeve, such as the first end sleeve 111 and the first connector 12, located at one end of the through hole seal 15 to enter and exit. The fixing can be achieved by using a flange 3102 and passing multiple screws through the screw holes of the flange 3102 and the circular steel plate 310, and tightening them into the multiple threaded holes of the annular sealing head 39. The axially convex elastic ring 152 on the outer circumference of the through-hole seal 15 is press-fitted with the central hole 3101 of the circular steel plate 310 for sealing. The axially convex elastic ring 152 on the outer circumference of the through-hole seal 15 can be understood as an elastic circular skirt structure. This elastic circular skirt structure facilitates the press-fitting or tightening and sealing of the central hole 3101 of the circular steel plate 310. The flexible sealing ring is, for example, a rubber sealing ring.
[0045] It is easy to understand that the airtightness of the sealing cylinder 31 itself was tested multiple times with gas pressure greater than the actual test pressure before the test, thus ensuring the airtightness of the airtightness testing part 3 of the testing device, such as the sealing cylinder 31. Furthermore, the connection between the first connector 12 and the sleeve 11, and the connection between the second connector 13 and the sleeve 11, were all confirmed to be leak-free after multiple airtightness tests by other processes; the airtightness of the plug needle 37 and the core through hole 131 of the second connector 13 were also confirmed to be leak-free after multiple airtightness tests; the airtightness of the axially convex elastic ring 152 of the outer circle of the through hole seal 15 and the center hole 3101 of the interference fit circular steel plate 310 were also confirmed to be leak-free after multiple airtightness tests. In other words, this testing device is specifically designed for airtightness testing between the sleeve 11 of the automotive cable 1 and the sealing sleeve 151 at the center of the through-hole seal 15. It has ensured the airtightness of the airtightness testing part 3 of the above testing device itself and other connections of the sleeve 11, providing a good foundation for airtightness testing between the sleeve 11 and the sealing sleeve 151 at the center of the through-hole seal 15. That is, after the pressure gauge 311 reaches the specified air pressure value and pauses for a predetermined time, if the pressure gauge value does not drop, the airtightness of the sleeve 11 and the sealing sleeve 151 at the center of the through-hole seal 15 meets the requirements, and the tested sleeve 11 is a qualified product. If the pressure gauge value drops, the airtightness of the sleeve 11 and the sealing sleeve 151 at the center of the through-hole seal 15 does not meet the requirements, and the tested sleeve, or automotive cable 1, is a non-qualified product. Its testing accuracy is very high.
[0046] The detection process of this detection device is briefly described as follows: The first connector 12 and sleeve 11 located at one end of the through-hole seal 15 enter the sealing cylinder 31 through the through hole formed by the central hole 3101 of the circular steel plate 310 and the inner hole 391 of the annular sealing head 39. The axially convex elastic ring 152 of the outer circle of the through-hole seal 15 with elastic skirt structure is interference-fitted or tightened in the central hole 3101 of the circular steel plate 310 to fix and seal it. Then, the annular groove 132 of the second connector 13 is inserted into the vertical notch 341 of the locking block 34 with the locking and straightening structure equipped with the plug pin 37. At this time, the large diameter rings at both ends of the annular groove 132 of the second connector 13 are axially limited on both sides of the locking block 34, that is, the second connector 13 is firmly locked. Also, because the longitudinal direction is... The sliding slide 33 has its length predetermined for the end sleeve, such as the second end sleeve 112, and its longitudinal position has been fixed in advance. Therefore, the end sleeve, such as the second end sleeve 112, is also straightened at the same time. Then, the start button switch of the power switch 4 is pressed to start the horizontal cylinder 35, so that the plug needle seat 36 or ejector seat at the free end of the piston rod 351 is fitted onto the free end of the second connector 13, and the conical plug needle 37 or conical ejector seals the core through hole 131 of the second connector 13. Then, gas at a predetermined pressure is injected into the sealing cylinder 31 through the air inlet 312 and the air pipe. If the air pump and the solenoid reversing valve are started, the pressure gauge value of the sealing cylinder 31 reaches the specified air pressure value, such as 2-2.6 MPa. After a predetermined pause time, such as 3-5 seconds, the pressure gauge value does not drop, which is considered qualified; otherwise, it is considered unqualified. Restart the horizontal cylinder 35 to drive the piston rod 351 back to its original position and remove the plug needle 37. The sealing cylinder 31 will then release air through the sleeve 11 and the second connector 13. Then press the stop button switch of the power switch 4 to cut off the power. Then, disengage the second connector 13 from the vertical notch 341. Then, pull out the through-hole seal 15 and take away the inspected car cable 1 product. Qualified car cables 1, or qualified car cables 1 products to be assembled, are placed in the qualified product space on the workbench, such as the third space. Unqualified car cables 1, or unqualified car cables 1 products to be assembled, can be placed in the unqualified product collection box.
[0047] Components, structures, or quantities not marked above are not shown in the drawings, and some components are not marked in the drawings. The drawings are for illustrative purposes only. In case of any inconsistency between the drawings and the text description, or between the drawings themselves, the text description shall prevail.
[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An airtightness testing device for the sleeve and through-hole seal of an automotive cable, comprising a control box, a power switch, and a workbench, characterized in that: It also includes a horizontal sealing cylinder fixed to the workbench by a support. The sealing cylinder is equipped with a pressure gauge. One end of the sealing cylinder has an air inlet. The other end of the sealing cylinder has a radial convex ring for the sleeve and the first connector located at one end of the through hole seal to enter and exit, and for interference fit and sealing with the through hole seal. The workbench also has a clamping and straightening structure for clamping the second connector located at the other end of the through hole seal and for straightening the sleeve located at the other end of the through hole seal. The clamping and straightening structure is also equipped with a plug needle driven by a horizontal cylinder for sealing the through hole of the second connector cable core.
2. The airtightness detection device for the sleeve and through-hole seal of the automotive cable according to claim 1, characterized in that: The locking and straightening structure with a plugging needle includes a slide block that slides on a longitudinal guide rail fixed to the worktable. The slide block and the longitudinal guide rail have a first positioning structure that positions the slide block at any longitudinal position. The top of the slide block has a support plate, and the end of the support plate near the sealing cylinder has a locking block with a vertical notch for the second connector to engage with an annular groove. A horizontal cylinder is fixed to the end of the support plate near the sealing cylinder, and the plugging needle is fixed at the center of the free end face of the piston rod of the horizontal cylinder.
3. The airtightness detection device for the sleeve and through-hole seal of the automotive cable according to claim 2, characterized in that: The horizontal cylinder has three parallel piston rods. The front ends of the three parallel piston rods are fixed with a rectangular slider that slides on the support plate. A circular plug seat is fixed at the center of the rectangular slider. The end of the circular plug seat near the second connector has a circular blind hole that fits the outer end of the second connector. A conical plug with a smaller outer end and a larger inner end is fixed at the center of the inner wall of the circular blind hole.
4. The airtightness detection device for the sleeve and through-hole seal of the automotive cable according to claim 2, characterized in that: The support plate has a transverse groove at one end near the sealing cylinder. The bottom of the locking block slides within the transverse groove. The support plate and the locking block have a second positioning structure that allows the locking block to be positioned at any transverse position within the transverse groove.
5. The airtightness detection device for the sleeve and through-hole seal of the automotive cable according to claim 1, characterized in that: There are two supports, both of which are vertical plates. The bottom of each vertical plate is fixed to the workbench plate. The upper part of each vertical plate has a fixing hole for fitting a sealing cylinder. Both ends of the sealing cylinder fitted into the two fixing holes are fixed to the vertical plate. The outer end of the sealing cylinder has a circular plug with an air inlet. The circular plug has an external thread that engages with the internal thread of the outer end of the sealing cylinder. There is a first flexible sealing ring between the circular plug and the outer end face of the sealing cylinder. The inner end of the sealing cylinder has an annular sealing head, which has an external thread that engages with the internal thread of the inner end of the sealing cylinder. A second flexible sealing ring is located between the annular sealing head and the inner end face of the sealing cylinder. The structure of the radial convex ring includes: a circular steel plate with a central hole is fixed to the end face of the annular sealing head near the plug needle; a third flexible sealing ring is located between the circular steel plate and the annular sealing head; the inner hole of the annular sealing head and the central hole of the circular steel plate together form a through hole for the sleeve and the first connector located at one end of the through hole seal to enter and exit; the axially convex elastic ring on the outer circle of the through hole seal is interference-fitted with the central hole of the circular steel plate and seals.