Vehicle-mounted ECU heating temperature rise test fixture

Abstract

The utility model belongs to the technical field of test fixtures, and particularly relates to a vehicle-mounted ECU heating temperature rise test fixture. A base is included; the heating module is arranged on the base, the heating module comprises a heat conduction copper core, and the heat conduction copper core is used for placing an ECU to be tested and heating the ECU to be tested; the upper die assembly is movably arranged on the to-be-tested ECU, and a probe is arranged below the upper die assembly and used for abutting against a circuit board of the to-be-tested ECU for testing; and the cooling fan is arranged on the base and is close to the heating module. According to the utility model, the test process is simplified, the heating efficiency is improved, and the temperature stability of the ECU to be tested in the test process is ensured, so that the reliability of the test result is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of test fixtures, and in particular relates to a vehicle-mounted ECU heating and temperature rise test fixture. Background Art

[0002] With the rapid development of automotive electronic technology, the performance and reliability of the vehicle-mounted ECU (electronic control unit) as one of the core components of the vehicle are crucial to the operation of the entire vehicle system. In order to ensure the stability and reliability of the vehicle-mounted ECU under various extreme temperature conditions, the temperature shock test has become an indispensable test link. The test is designed to simulate the tolerance of the vehicle-mounted ECU in extremely high and low temperature continuous environments, so as to evaluate the chemical changes or physical damage that may be caused by thermal expansion and contraction.

[0003] The traditional heating test method for vehicle-mounted ECUs usually uses heating elements such as resistance wires and electric heating tubes to transfer heat to the ECU under test through air convection. However, this method has obvious limitations: first, the heating efficiency is low, because air, as a heat conduction medium, has a relatively low heat conduction efficiency; second, the temperature distribution is uneven, which can easily lead to local overheating or overcooling of the ECU under test, affecting the accuracy of the test results; finally, the test operation is cumbersome, and the ECU under test needs to be manually removed after the heating is completed, and then the test probe is connected for performance testing, which is not only time-consuming and labor-intensive, but also easy to cause unnecessary damage to the ECU during operation.

[0004] Therefore, there is an urgent need for an on-vehicle ECU heating test fixture that can improve the efficiency and accuracy of the test. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies in the prior art and provide a vehicle-mounted ECU heating and temperature rise test fixture, which not only simplifies the test process and improves the heating efficiency, but also ensures the temperature stability of the ECU to be tested during the test, thereby greatly improving the reliability of the test results.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A vehicle-mounted ECU heating test fixture, comprising:

[0008] Base;

[0009] A heating module is arranged on the base, the heating module comprises a heat-conducting copper core, and the heat-conducting copper core is used to place the ECU to be tested and heat the ECU to be tested;

[0010] An upper mold assembly is movably arranged on the ECU to be tested, and a probe is provided below the upper mold assembly for abutting against a circuit board of the ECU to be tested for testing;

[0011] A heat dissipation fan is arranged on the base, and the heat dissipation fan is close to the heating module.

[0012] Furthermore, the heating module includes a heating seat, a heat insulation board is provided on the heating seat, and the heat-conducting copper core passes through the heat insulation board and is connected to the heating seat.

[0013] Furthermore, a high-frequency resistor and a heat-conducting plate are provided in the heating seat, and the heat-conducting copper core is connected to the heat-conducting plate.

[0014] Furthermore, a plurality of guide blocks are provided on the heat insulation board near the heat-conducting copper core for guiding the ECU to be tested.

[0015] Furthermore, a flip seat is provided on the heat insulation board behind the heat-conducting copper core, and the upper mold assembly is connected to the flip seat; a lock is provided on the heat insulation board in front of the heat-conducting copper core for locking the upper mold assembly.

[0016] Furthermore, the upper mold assembly includes a pre-pressing linkage plate, a cover plate movably connected to the pre-pressing linkage plate, and a winding cover arranged on the cover plate, and the probe is arranged below the winding cover.

[0017] Furthermore, the pre-stressing linkage plate and the cover plate are provided with a first connecting port and a second connecting port corresponding to each other, the cover plate is provided with two symmetrical track blocks near the edge of the second connecting port, and cam followers installed to the track blocks are provided at both ends of the winding cover.

[0018] Furthermore, a handle is provided on the edge of the cover plate.

[0019] Furthermore, a side insertion module is provided on the base for performing a side insertion test on the connector on the side of the ECU to be tested.

[0020] Furthermore, the side plug-in module comprises a transverse pressure elbow clamp, on which a side plug-in connector is provided.

[0021] Beneficial effects of the utility model:

[0022] The utility model heats the ECU to be tested by placing it on a heat-conducting copper core, so the heating efficiency is high; by arranging an upper mold assembly, it is convenient to perform testing during the heating process, thereby improving the test efficiency and the accuracy of the result; by arranging a guide block, it is convenient to guide the installation of the ECU; by arranging a flip seat and a lock buckle, it is convenient to lock the upper mold assembly during the test; by arranging a pre-pressing linkage plate, pre-pressing positioning is performed when the upper mold assembly is pressed down onto the ECU to be tested, thereby ensuring the alignment of the probe; by arranging a track block and a cam follower, the probe is in a vertical state when the upper mold assembly covers the ECU to be tested; by arranging a side plug-in module group, it is convenient to perform side plug-in testing on the connector on the side of the ECU to be tested at the same time; the utility model not only simplifies the test process and improves the heating efficiency, but also ensures the temperature stability of the ECU to be tested during the test, thereby greatly improving the reliability of the test result. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 It is a structural schematic diagram of the vehicle-mounted ECU heating and temperature rise test fixture of the utility model;

[0024] Attached Figure 2 It is a schematic diagram of the explosion structure of the vehicle-mounted ECU heating and temperature rise test fixture of the utility model;

[0025] Attached Figure 3 It is a schematic diagram of the partial explosion structure of the vehicle-mounted ECU heating and temperature rise test fixture of the utility model;

[0026] Attached Figure 4 It is a schematic diagram of the exploded structure of the upper die assembly of the utility model;

[0027] Attached Figure 5 It is a structural schematic diagram of the side plug-in module of the utility model;

[0028] Markings in the figure: 1-base; 2-heating module, 210-thermal copper core, 220-heating seat, 221-high frequency resistor, 222-heat conducting plate, 230-heat insulation board; 3-upper mold assembly, 310-pre-pressure linkage plate, 311-first connecting port, 320-cover plate, 321-second connecting port, 322-track block, 323-handle, 330-winding cover, 331-probe, 332-cam follower; 4-cooling fan; 5-guide block; 6-flip seat; 7-lock; 8-side plug-in module, 810-horizontal pressure elbow clamp, 820-side plug-in connector, 830-elbow clamp seat; 9-ECU to be tested. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See attached Figure 1 To Attachment Figure 5 , the figure shows a specific embodiment of a vehicle-mounted ECU heating and temperature rise test fixture provided by the utility model.

[0034] See attached Figure 1 , the vehicle ECU heating test fixture includes:

[0035] Base 1;

[0036] A heating module 2 is arranged on the base 1, and the heating module 2 includes a heat-conducting copper core 210, and the heat-conducting copper core 210 is used to place the ECU 9 to be tested and heat the ECU 9 to be tested;

[0037] An upper mold assembly 3 is movably arranged on the ECU 9 to be tested, and a probe 331 is arranged below the upper mold assembly 3 for contacting the circuit board of the ECU 9 to be tested for testing;

[0038] The cooling fan 4 is disposed on the base 1 and is close to the heating module 2 .

[0039] See attached Figure 2 In the above embodiment, during the test, the ECU 9 to be tested is placed on the heat-conducting copper core 210. Specifically, one side of the ECU 9 to be tested is a circuit board. The circuit board is placed on the heat-conducting copper core 210 with one side facing upward, and the heating module 2 is started to heat the ECU 9 to be tested; the upper mold assembly 3 presses down the ECU 9 to be tested. During the pressing process, the probe 331 contacts the circuit board of the ECU 9 to test the circuit board. Three cooling fans 4 are arranged around the heating module 2 to dissipate heat from the test area on the fixture.

[0040] See attached Figure 3 In the above embodiment, the heating module 2 includes a heating seat 220, a heat insulation board 230 is provided on the heating seat 220, and the heat-conducting copper core 210 passes through the heat insulation board 230 and is connected to the heating seat 220. In the embodiment, the heating seat 220 is located on the base 1, the heat insulation board 230 is located on the heating seat 220, a through hole is provided in the middle of the heat insulation board 230, and the heat-conducting copper core 210 extends upward from the heating seat 220 through the through hole in the middle of the heat insulation board 230. All the heat generated by the heating seat 220 is supplied to the heat-conducting copper core 210, which improves the heating efficiency of the heat-conducting copper core 210, and at the same time, the heat is isolated by the heat insulation board 230 to avoid affecting other electronic components on the fixture.

[0041] See attached Figure 3 In the above embodiment, a high-frequency resistor 221 and a heat-conducting plate 222 are provided in the heating seat 220, and the heat-conducting copper core 210 is connected to the heat-conducting plate 222. In the embodiment, the large-area high-frequency resistor 221 generates heat and transfers the heat to the heat-conducting plate 222, and the heat-conducting plate 222 is connected to the heat-conducting copper core 210, so that the heat generated by the high-frequency resistor 221 can be supplied to the heat-conducting copper core 210, thereby improving the heating efficiency of the heat-conducting copper core 210. In the embodiment, the heat-conducting copper core 210 is an annular structure, and the shape of the upper surface of the heat-conducting copper core 210 is adapted to the shape of the contact surface of the ECU 9 to be tested, thereby increasing the contact area and ensuring the stability of the ECU 9 to be tested during the test.

[0042] See attached Figure 3In the above embodiment, a plurality of guide blocks 5 are provided on the heat insulation board 230 near the heat-conducting copper core 210 to guide the ECU 9 to be tested. In the embodiment, the guide blocks 5 are provided with an inclined surface on the side facing the heat-conducting copper core 210, so as to facilitate the rough positioning of the ECU 9 to be tested in the process of placing the ECU 9 to be tested on the heat-conducting copper core 210. The guide blocks 5 also play a limiting role to ensure that the ECU 9 to be tested will not deviate from the test position on the fixture during the test.

[0043] See attached Figure 3 In the above embodiment, a flip seat 6 is provided on the heat insulation board 230 at the rear of the heat conductive copper core 210, and the upper mold assembly 3 is connected to the flip seat 6; a lock 7 is provided on the heat insulation board 230 at the front of the heat conductive copper core 210, which is used to lock the upper mold assembly 3. In the embodiment, the upper mold assembly 3 is connected to the flip seat 6, and is opened or closed by flipping. When it is opened, the probe 331 is away from the ECU 9 to be tested, and when it is closed, the probe 331 is close to and abuts against the ECU 9 to be tested. After closing, in order to ensure that the probe 331 is in good contact during the test, the lock 7 provided in front of the heat conductive copper core 210 buckles the barb on the upper mold assembly 3, so that one end of the upper mold assembly 3 is fixed by the flip seat 6, and the other end is fixed by the lock 7, so that the probe 331 is in good contact with the circuit board of the ECU 9 to be tested.

[0044] See attached Figure 4 In the above embodiment, the upper mold assembly 3 includes a pre-stressing linkage plate 310, a cover plate 320 movably connected to the pre-stressing linkage plate 310, and a winding cover 330 arranged on the cover plate 320, and a probe 331 is arranged below the winding cover 330. In the embodiment, the pre-stressing linkage plate 310 and the cover plate 320 are movably connected at one end close to the flip seat 6, so that the pre-stressing linkage plate 310 and the cover plate 320 can rotate relative to each other by a certain angle. In this embodiment, the opening angle between the pre-stressing linkage plate 310 and the cover plate 320 is in the range of 0~7°. During the test, in the process of flipping and closing the upper mold assembly 3, the pre-stressing linkage plate 310 and the cover plate 320 are in an open state, and the pre-stressing linkage plate 310 located below is first pressed onto the circuit board of the ECU 9 to be tested, so as to realize the pre-stressing positioning of the ECU 9 to be tested. Then, the upper mold assembly 3 is continuously pressed down, and the probe 331 below the winding cover 330 abuts against the ECU 9 to be tested. Due to the pre-pressing positioning of the pre-pressing linkage plate 310 , it is ensured that the test needle point can be accurately aligned when the probe 331 abuts against the circuit board.

[0045] See attached Figure 4In the above embodiment, the pre-pressing linkage plate 310 and the cover plate 320 are provided with a first connecting port 311 and a second connecting port 321 corresponding to each other, and the cover plate 320 is provided with two symmetrical track blocks 322 near the edge of the second connecting port 321, and the two ends of the winding cover 330 are provided with cam followers 332 mounted to the track blocks 322. In the embodiment, the two ends of the winding cover 330 are movably mounted with the cover plate 320 through the cam followers 332 and the track blocks 322, and the winding cover 330 mounted on the cover plate 320 has a certain swing amplitude, so that in the process of flipping and pressing the upper mold assembly 3, the probe 331 can test the pin points on the circuit board of the ECU 9 to be tested at a vertical downward angle, so as to avoid the probe 331 from tilting and scratching the ECU 9 to be tested or damaging the probe 331 itself.

[0046] See attached Figure 4 In the above embodiment, a handle 323 is provided on the edge of the cover plate 320. In the embodiment, the handle 323 facilitates the tester to manually open and close the upper mold assembly 3. During the opening process, the cover plate 320 is first lifted, and then the pre-pressing linkage plate 310 is lifted. When the upper mold assembly 3 is opened until the cover plate 320 is perpendicular to the base 1, the upper mold assembly 3 is completely opened.

[0047] See attached Figure 5 In the above embodiment, the base 1 is provided with a side plug module 8 for performing a side plug test on the connector on the side of the ECU 9 to be tested. In the embodiment, two side plug modules 8 are provided, both located in front of the heating module 2, so that when the heating module 2 heats the ECU 9 to be tested and tests the circuit board, the side plug test can be performed simultaneously, so as to complete multiple test requirements on one fixture and improve the test efficiency.

[0048] See attached Figure 5 In the above embodiment, the side plug module 8 includes a horizontal pressing elbow clamp 810, and the horizontal pressing elbow clamp 810 is provided with a side plug connector 820. In the embodiment, a toggle clamp seat 830 is fixed on the base 1, and the horizontal pressing elbow clamp 810 is fixed on the toggle clamp seat 830. The angle of the horizontal pressing elbow clamp 810 is determined by the toggle clamp seat 830 to align with the connector on the side of the ECU 9 to be tested. During the test, the tester pushes the horizontal pressing elbow clamp 810, so that the side plug connector 820 fixed to the active end of the horizontal pressing elbow clamp 810 is pushed forward and connected to the connector of the ECU 9 to be tested, thereby realizing the side plug test of the ECU 9 to be tested.

[0049] In summary, the present embodiment provides a vehicle-mounted ECU heating and temperature rise test fixture, which heats the ECU 9 to be tested by placing it on the heat-conducting copper core 210, and has high heating efficiency; by setting the upper mold assembly 3, it is convenient to test during the heating process, thereby improving the test efficiency and the accuracy of the results; by setting the guide block 5, it is convenient to guide and install the ECU 9 to be tested; by setting the flip seat 6 and the lock 7, it is convenient to lock the upper mold assembly 3 during the test; by setting the pre-pressing linkage plate 310, when the upper mold assembly 3 is pressed down to the ECU 9 to be tested, pre-pressing positioning is performed to ensure that the probe 331 is aligned; by setting the track block 322 and the cam follower 332, when the upper mold assembly 3 covers the ECU 9 to be tested, the probe 331 is in a vertical state; by setting the side plug-in module 8, it is convenient to perform side plug-in testing on the connector on the side of the ECU 9 to be tested at the same time; the present embodiment not only simplifies the test process and improves the heating efficiency, but also ensures the temperature stability of the ECU to be tested during the test, thereby greatly improving the reliability of the test results.

[0050] The embodiment described above is only one of the more preferred specific embodiments of the present invention. Common changes and substitutions made by technicians in this field within the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle-mounted ECU heating test fixture, characterized in that: include: Base (1); a heating module (2) disposed on the base (1), the heating module (2) comprising a heat-conducting copper core (210), the heat-conducting copper core (210) being used to place the ECU to be tested (9) and to heat the ECU to be tested (9); An upper mold assembly (3) movably arranged on the ECU (9) to be tested, wherein a probe (331) is provided below the upper mold assembly (3) for contacting a circuit board of the ECU (9) to be tested for testing; A cooling fan (4) is arranged on the base (1), and the cooling fan (4) is close to the heating module (2).

2. The vehicle-mounted ECU heating and temperature rise test fixture according to claim 1 is characterized in that: The heating module (2) comprises a heating seat (220), a heat insulation board (230) is provided on the heating seat (220), and the heat-conducting copper core (210) passes through the heat insulation board (230) and is connected to the heating seat (220).

3. A vehicle-mounted ECU heating and temperature rise test fixture according to claim 2, characterized in that: A high-frequency resistor (221) and a heat-conducting plate (222) are provided in the heating seat (220), and the heat-conducting copper core (210) is connected to the heat-conducting plate (222).

4. The vehicle-mounted ECU heating and temperature rise test fixture according to claim 2 is characterized in that: A plurality of guide blocks (5) are provided on the heat insulation board (230) near the heat-conducting copper core (210) for guiding the ECU (9) to be tested.

5. The vehicle-mounted ECU heating and temperature rise test fixture according to claim 2 is characterized in that: A flip seat (6) is provided on the heat insulation board (230) at the rear of the heat-conducting copper core (210), and the upper mold assembly (3) is connected to the flip seat (6); a lock buckle (7) is provided on the heat insulation board (230) at the front of the heat-conducting copper core (210) for locking the upper mold assembly (3).

6. A vehicle-mounted ECU heating and temperature rise test fixture according to any one of claims 1-5, characterized in that: The upper die assembly (3) comprises a pre-pressing linkage plate (310), a cover plate (320) movably connected to the pre-pressing linkage plate (310), and a winding cover (330) disposed on the cover plate (320), and the probe (331) is disposed below the winding cover (330).

7. The vehicle-mounted ECU heating and temperature rise test fixture according to claim 6 is characterized in that: The pre-compression linkage plate (310) and the cover plate (320) are provided with a first connecting port (311) and a second connecting port (321) corresponding to each other; the cover plate (320) is provided with two symmetrical track blocks (322) near the edge of the second connecting port (321); and cam followers (332) mounted on the track blocks (322) are provided at both ends of the winding cover (330).

8. The vehicle-mounted ECU heating and temperature rise test fixture according to claim 6 is characterized in that: A handle (323) is provided on the edge of the cover plate (320).

9. The vehicle-mounted ECU heating and temperature rise test fixture according to claim 1 is characterized in that: The base (1) is provided with a side insertion module (8) for performing a side insertion test on a connector on a side of the ECU (9) to be tested.

10. The vehicle-mounted ECU heating and temperature rise test fixture according to claim 9, characterized in that: The side plug-in module (8) comprises a transverse pressing elbow clamp (810), and a side plug-in connector (820) is provided on the transverse pressing elbow clamp (810).

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