Airtight test equipment for PTC heating core assembly and wire harness
By designing the test bench base, mounting clips, and test chamber structure of the airtightness testing equipment, the problem of time-consuming and labor-intensive airtightness testing of PTC heating core components and wiring harnesses was solved, achieving efficient and accurate airtightness testing and protecting the test pieces from damage.
Patent Information
- Application Number
- CN202520655375.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-09
AI Technical Summary
In the existing technology, the airtightness testing of PTC heating core components and wiring harnesses is time-consuming and labor-intensive, and there is a problem of low test accuracy due to the movement of the test piece.
An airtightness testing device was designed, comprising a test bench base, a mounting clip, a first test chamber, and a second test chamber. These structures are connected by an airtightness tester to detect the airtightness of the wire harness, and the pressure difference is detected by compressed air to determine leakage.
It improves testing efficiency, prevents test piece movement, ensures testing accuracy, and protects the test piece with sealing rings and chamfers to prevent compressed gas leakage.
Smart Images
Figure CN223955091U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to airtight test equipment field especially to a kind of airtight test equipment for PTC heating core assembly and pencil. BACKGROUND
[0002] PTC heating core assembly airtightness test is generally in the qualified detection of heating core assembly factory, for several groups of heating core assembly equipment, after using a period of time, heating core assembly also appears the problem caused by airtightness, heating core assembly is composed of several heating, and it has several groups of pencil, if every group of pencil is tested separately, it is time-consuming and laborious. UTILITY MODEL CONTENT
[0003] The utility model discloses a kind of airtight test equipment for PTC heating core assembly and pencil, the airtightness test is completed by installing the first test cavity and the second test cavity on the several groups of pencil on test piece.
[0004] To solve the above technical problems, the following technical solutions are adopted:
[0005] The utility model provides a kind of airtight test equipment for PTC heating core assembly and pencil, including the test table base for installing airtight tester and the installation clamp for installing test piece, the installation clamp is set on the test table base, first test cavity and second test cavity for respectively installing the first end and tail end several pencil on test piece are equipped on the test table base;
[0006] The airtight tester is connected with first test cavity and second test cavity, the airtight tester transports compressed air to first test cavity, compressed air enters test piece from first end pencil, then is discharged from tail end pencil to second test cavity, then enters into airtight tester, and the airtight tester detects the pressure difference between output compressed gas and incoming compressed gas.
[0007] Optionally, the test table base is also provided with a cooling fan for cooling.
[0008] Optionally, the first test cavity is located in test end, and the second test cavity is located in feedback end, and the test end and the feedback end are both composed of upper shell and lower shell, and the first test cavity or second test is formed inside after the upper shell and the lower shell cooperate.
[0009] Optionally, the upper shell and the lower shell are installed by bolt.
[0010] Optionally, sealing ring is provided between the upper shell and the lower shell, and sealing ring is provided between the test end and the feedback end and the test table base.
[0011] Optionally, the test bench base is formed by welding galvanized sheet and is surface-plasticized.
[0012] Optionally, the back of the test bench base is provided with a power socket, and the front is provided with a power switch and start and stop buttons and a display of the air tightness tester.
[0013] Optionally, the mounting clip is a plate-shaped structure provided with bosses at four top corners, and the inner side of the boss is provided with a chamfer.
[0014] Compared with the prior art, the utility model has the beneficial effects that:
[0015] 1. The utility model discloses a first test cavity and a second test cavity are connected with the air tightness tester, thereby testing the air tightness of the test piece with multiple wire harnesses, and the mounting clip is used to mount the test piece, thereby avoiding the movement of the test piece during testing.
[0016] 2. The utility model discloses a chamfer on the mounting clip, avoiding the damage of the test piece, and a sealing ring is mounted on the test end and the feedback end, avoiding the leakage of internal compressed gas and ensuring the testing precision. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is one of the use state structure schematic diagrams of the air tightness testing equipment in the utility model;
[0018] Figure 2 is the second use state structure schematic diagram of the air tightness testing equipment in the utility model;
[0019] Figure 3 is the overall structure schematic diagram of the air tightness testing equipment in the utility model;
[0020] Figure 4 is the sectional structure schematic diagram of the air tightness testing equipment in the utility model.
[0021] BRIEF DESCRIPTION OF DRAWINGS
[0022] 1. Test bench base; 11. Power socket; 12. Power switch; 13. Start button; 14. Stop button; 15. Display screen; 2. Mounting clip; 21. Boss; 22. Chamfer; 3. Test end; 31. First test cavity; 4. Feedback end; 41. Second test cavity; 5. Upper shell; 6. Lower shell; 7. Bolt; 8. Test piece; 81. Wire harness. DETAILED DESCRIPTION
[0023] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is merely illustrative, and is by no means intended to limit the present application and its application or use in any way.
[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment 1
[0025] The embodiment provides a kind of PTC heating core assembly and wire harness airtight test equipment, including test table pedestal 1 and installation clamp 2, installation clamp 2 is installed on the upper surface of test table pedestal 1, first test cavity 31 and second test cavity 41 for installing test piece 8 wire harness 81 are also provided on test table pedestal 1.There is airtight tester for testing airtightness in test table pedestal 1.
[0026] The test piece 8 has a plurality of head-end wire bundles 81 and a plurality of tail-end wire bundles 81, the plurality of head-end wire bundles 81 are arranged in the first test cavity 31, the plurality of tail-end wire bundles 81 are arranged in the second test cavity 41, the first test cavity 31 is communicated with the gas delivery interface of the air tightness tester, and the second test cavity 41 is communicated with the gas inlet interface of the air tightness tester. The air tightness tester delivers compressed gas to the first test cavity 31 through the gas delivery interface, the compressed gas enters the inside of the test piece 8 from the plurality of head-end wire bundles 81, is discharged to the second test cavity 41 from the tail-end 81, and finally enters the air tightness tester through the gas inlet interface. The air tightness tester is provided with a component for measuring air pressure in the channel communicated with the gas delivery interface and the gas inlet interface, the component for measuring air pressure collects the air pressure of the compressed gas at the gas delivery interface and the gas inlet interface, and a processing unit in the air tightness tester calculates the pressure difference between the two interfaces, so as to detect whether the test piece 8 leaks.
[0027] The first test cavity 31 and the second test cavity 41 are arranged, which facilitates fixing the plurality of wire bundles 81 on the test piece 8.
[0028] The test piece 8 is arranged on the mounting clamp 2, so that the test piece 8 is prevented from moving during testing, and the testing accuracy is improved. Embodiment 2
[0029] The difference between the embodiment and the embodiment 1 is that the test bench base is provided with a test end 3 and a feedback end 4, the test end 3 and the feedback end 4 each include an upper shell 5 and a lower shell 6, the upper shell 5 and the lower shell 6 are each a rectangular box structure with an open end, the openings of the upper shell 5 and the lower shell 6 are aligned with each other and are connected through a bolt 7, threads are formed on the upper shell 5 and the lower shell 6, a screw rod is matched with the threads on the upper shell 5 and the lower shell 6, the screw rod at the outer end of the upper shell 5 is screwed through a butterfly nut, and the upper shell 5 and the lower shell 6 are installed together to form the first test cavity 31 and the second test cavity 41.
[0030] The test end 3 and the feedback end 4 are each processed by aluminum alloy CNC, a sealing ring is arranged between the test end 3 and the feedback end 4 and the test bench base 1, and a special-shaped sealing ring is arranged around the upper shell 5 and the lower shell 6, the special-shaped sealing ring can pass through the wire bundle 81, and the end of the wire bundle 81 is arranged between the upper shell 5 and the lower shell 6. The compressed air between the upper shell 5 and the lower shell 6 is prevented from leaking, and the testing accuracy is affected.
[0031] The test bench base 1 is further provided with a cooling fan, and a cooling hole is formed in the side wall of the test bench base 1, and the cooling fan and the cooling hole are used for cooling the air tightness tester inside.
[0032] The test bench base 1 is formed by welding a galvanized sheet and is subjected to a plastic spraying treatment on the surface.
[0033] The back of the test bench base 1 is provided with a power socket 11 for powering the air tightness tester and the cooling fan, and the front is provided with a power switch 12, a start button 13 of the air tightness tester, a stop switch 14 and a display screen 15. The display screen 15 can display the pressure of the first test chamber 31 and the second test chamber 41 and the pressure difference between the two chambers.
[0034] The mounting clip 2 is made of aluminum alloy by CNC machining, and is a plate-shaped structure with bosses 21 at four corners. The range surrounded by the bosses 21 at the four corners is the same size as the test piece 8. The bosses 21 are L-shaped structures, and the inner side of the bosses 21 is provided with a chamfer 22. After the test piece 8 is installed, the chamfer 22 can avoid damage to the outer surface of the test piece 8.
[0035] In use, taking the test piece 8 as a heating core assembly as an example, the butterfly nut on the test end 3 and the feedback end 4 is unscrewed, the upper shell 5 and the lower shell 6 are loosened, the first end wire harness 81 of the heating core assembly is arranged between the upper shell 5 and the lower shell 6 of the test end 3, so that the end of the first end wire harness 81 is located in the first test chamber 31, and the tail end wire harness 81 is arranged between the upper shell 5 and the lower shell 6 of the feedback end 4, so that the end of the tail end wire harness 81 is located in the second test chamber 41. Plug in the power, turn on the power switch 12, open the start button 13, the air tightness tester delivers 50KP pressure compressed gas to the first test chamber 31, the compressed gas enters the heating core assembly through the first end wire harness 81, then is discharged from the tail end wire harness 81 to the second test chamber 41, and finally returns to the air tightness tester. Wait for 30 seconds, the air tightness tester calculates the pressure difference between the output and the incoming compressed gas, judges whether it is leaking, and finally displays the result on the display screen 15.
[0036] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.
Claims
1. An airtightness testing device for PTC heating element assemblies and wiring harnesses, characterized in that, It includes a test bench base for mounting an airtightness tester and a mounting clip for mounting test pieces. The mounting clip is disposed on the test bench base, and the test bench base is provided with a first test cavity and a second test cavity for mounting several wire harnesses at both ends of the test piece, respectively. The air tightness tester is connected to the first test chamber and the second test chamber. The air tightness tester delivers compressed air to the first test chamber. After the compressed air enters the test piece from the first end wire harness, it is discharged from the tail end wire harness to the second test chamber and then enters the air tightness tester. The air tightness tester detects the pressure difference between the output compressed gas and the entering compressed gas.
2. The airtightness testing equipment for PTC heating core components and wiring harnesses according to claim 1, characterized in that, The test bench base is also equipped with a cooling fan for heat dissipation.
3. The airtightness testing equipment for PTC heating core components and wiring harnesses according to claim 1, characterized in that, The first test chamber is located inside the test end, and the second test chamber is located inside the feedback end. Both the test end and the feedback end are composed of an upper shell and a lower shell. After the upper shell and the lower shell are fitted together, they form the first test chamber or the second test chamber inside.
4. The airtightness testing equipment for PTC heating core components and wiring harnesses according to claim 3, characterized in that, The upper housing and the lower housing are installed by bolts.
5. The airtightness testing equipment for PTC heating core components and wiring harnesses according to claim 3, characterized in that, A sealing ring is provided between the upper housing and the lower housing, and a sealing ring is provided between the test end and the feedback end and the test platform base.
6. The airtightness testing equipment for PTC heating core components and wiring harnesses according to claim 1, characterized in that, The test bench base is formed by welding galvanized sheet and has a powder-coated surface.
7. The airtightness testing equipment for PTC heating element components and wiring harnesses according to claim 6, characterized in that, The test bench base has a power socket on the back and a power switch, a start button and a stop button for the airtightness tester, and a display on the front.
8. The airtightness testing equipment for PTC heating core components and wiring harnesses according to claim 1, characterized in that, The mounting clip is a plate-shaped structure with bosses at the four corners, and the inner side of the bosses is chamfered.