A mistake-proofing type burn-in test cart

Abstract

The utility model discloses a kind of mistake-proof type aging test trolley, belong to electronic equipment test tooling technical field.The trolley includes main body frame and test fixture, main body frame is evenly spaced layer board, test fixture includes base, compactor and backplate, backplate is provided with jack and / or pin, base is provided with limit block, layer board is provided with round hole fixed test fixture.Test fixture back surface forms independent cable channel and aviation socket box electrical connection;The utility model constructs three-dimensional mistake-proof system by compactor, limit block and backplate pin, down-pressing handle realizes quick fixing, cable channel standard management cable, solve the problem of mistake-proofing deficiency, unreliable fixation and cable confusion in prior art, reduce misplug rate, improve test efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment testing tooling technology, specifically relating to a fault-proof aging test trolley. Background Technology

[0002] Aging testing of electronic equipment is a crucial step in verifying its long-term operational reliability. It typically requires fixing the device under test (DUT) onto a test fixture and connecting it to its electrical interface via pins to transmit test signals. Existing aging test trolleys have the following drawbacks:

[0003] Insufficient error prevention: The positioning of the device under test and the test fixture relies on human experience, and incorrect placement can easily lead to misalignment of the pins and the device interface, resulting in test failure or equipment damage.

[0004] Poor reliability of fixing: The clamping structure of traditional clamps is mostly manually tightening bolts, which is cumbersome to operate and the equipment is prone to loosening during the test due to incomplete fixing;

[0005] Disorganized cable management: Cables are tangled and intertwined during multi-station testing, which not only affects the stability of signal transmission but also increases the difficulty of maintenance.

[0006] Therefore, there is an urgent need for an aging test trolley that is compact, easy to operate, and has error-proofing features to improve testing efficiency and reliability. Summary of the Invention

[0007] The purpose of this invention is to provide a fault-proof aging test trolley that solves the problems of test misoperation, unreliable fixing, and chaotic cable management in the prior art by optimizing the fixture structure, enhancing positioning accuracy, and standardizing cable layout.

[0008] To achieve the above objectives, this utility model designs a fault-proof aging test trolley, wherein shelves are arranged at intervals along the height direction in the main frame of the trolley; characterized in that test fixtures are provided on the shelves.

[0009] The structure, size, and height of the main frame are matched with the structure of the aging chamber; when the aging test trolley carrying the main frame enters, exits, positions, connects electrical signals, outputs detection, and supplies power, it is consistent with the interface and direction inside the aging chamber, and the trolley can maintain a certain safe distance from the surroundings when it enters.

[0010] The test fixture includes a clamp, a base and a back plate that are sequentially fixed to the shelf, wherein the back plate is provided with a number of electrical connection sockets and / or pins.

[0011] The backplate can be entirely configured with socket-type electrical connections, entirely with pin-type electrical connections, or a combination of pin-type and socket-type electrical connections, depending on the measurement requirements of the instrument under test.

[0012] When the backplate is set with sockets, the instrument under test needs to have pins corresponding to the sockets; when the backplate is set with pins, the pins are connected to the wiring clamps on the instrument under test.

[0013] The test fixture achieves error prevention and fixation of the instrument under test through the coordinated action of the base, clamp, and back plate.

[0014] The shelf is also provided with a cable adapter bar (not shown in the figure, usually located on both sides of the shelf). One end of the adapter bar is electrically connected to the corresponding socket or pin through a cable, and the other end is connected to several cables with plugs.

[0015] The other end of the adapter is connected to external power supply and / or external signal acquisition, processing, and display equipment via several cables with connectors. One end of the adapter is electrically connected to the backplane pins via cables, ensuring that the signal from the instrument under test can be accurately transmitted to the adapter, thus guaranteeing the stability and accuracy of signal transmission. The other end is connected to external power supply equipment or external signal acquisition, processing, and display equipment via several cables with connectors, providing a standardized interface for subsequent signal output and facilitating quick and reliable connection to external testing equipment and control systems.

[0016] The dual-connection design of the adapter effectively integrates the internal pin signals and the external device interface, forming a complete signal transmission link. This enables efficient data interaction between the test fixture, the instrument under test, and the external test system, improving the convenience and compatibility of the testing process.

[0017] When operators perform aging tests, the adapter and pins are pre-connected by cables. Operators only need to place the instrument under test on the test clamp and fix it, without having to perform any wiring operations, which further reduces the misconnection rate.

[0018] Furthermore, the main frame has several circular holes spaced apart on its layer plates.

[0019] The circular holes correspond one-to-one with the bolt holes on the base of the test fixture, and are used to achieve a detachable connection between the test fixture and the base through bolts.

[0020] Furthermore, the circular holes are regularly spaced, with each shelf having at least four rows of circular holes in the width direction, and two rows forming a group, meaning at least two sets of test fixtures can be installed; and at least three rows of circular holes in the depth direction, with one set of test fixtures installed in every 3*2 circular holes, where 2*2 holes are used to install the base, 1*2 holes are used to install the back plate, and clamps are separately fixedly installed at the front or rear end of the shelf.

[0021] Furthermore, the test fixtures are arranged in two rows of mirror-symmetrical arrangement above the shelf, with the horizontal transverse central axis of the shelf as the symmetry reference. The back plates of the two rows of test fixtures are arranged opposite each other, and the clamps face outwards of the shelf in a mirror-symmetrical manner.

[0022] Furthermore, an independent cable channel is formed in the middle area between the two rows of test fixture back plates, and the cables are fastened to the shelf by cable fasteners (such as cable ties or buckles) in the cable channel.

[0023] At this time, at least 4 rows of round holes are provided in the width direction and at least 8 rows of round holes are provided in the depth direction on the shelf. Two sets of test fixtures are mirrored in every 6*2 round holes. The 4*2 holes are used to install the base and the 2*2 holes are used to install the back plate. The clamps are separately fixedly installed at the front or rear of the shelf. Two rows of round holes are left in the middle of the two rows of test fixtures to fix the cable between the back plate and the adapter.

[0024] By using two rows of test fixture backplates, an independent cable channel is created in the central area. This design effectively avoids interference between cables and other components, ensuring signal transmission stability while also facilitating subsequent installation, inspection, and maintenance. Cables within the channel are secured to the shelves using cable clips, ensuring that they will not shift due to external forces such as pulling or vibration during use, preventing poor contact or line damage. This orderly securing optimizes cable arrangement, reduces electromagnetic interference, and improves the overall reliability and safety of the test fixture.

[0025] Furthermore, the shelf has a row of regularly spaced test fixtures in the width direction, and the back of the test fixtures forms an independent cable channel.

[0026] The back side, as defined in this application, refers to the side surface of the test fixture that is opposite to the insertion direction of the instrument under test when it is installed on the shelf, i.e., the other structural surface opposite to the operating surface of the instrument under test.

[0027] In the test fixture, the base, clamp, and back plate are fixedly connected to the shelf on the main frame by bolts passing through the round holes of the shelf.

[0028] The back plate is vertically fixed to one side of the base, and the clamp is horizontally fixed to the other side of the base. The back plate is fixed close to the inner side of the main frame, and the clamp is fixed close to the outer side of the main frame.

[0029] Furthermore, the clamping device consists of a clamping plate and a handle. A telescopic connecting column is provided between the clamping plate and the handle. One end of the connecting column is fixedly connected to the clamping plate, and the other end is connected to the handle through a hinge shaft, so that when the handle is turned, the connecting column can be driven to extend and retract, thereby causing the clamping plate to vertically clamp the instrument under test.

[0030] The clamping plate can move along a depth direction parallel to the upper surface of the layer plate by the telescopic movement of the connecting column.

[0031] This application defines the left-right direction as the width direction, the front-back direction as the depth direction, and the up-down direction as the height direction when facing the trolley.

[0032] The handle is a press-down handle with an elastic rubber pad at the bottom. When the clamping plate contacts the front side of the workpiece, pressing down the handle makes the rubber pad fit tightly against the upper surface of the plate, and the position of the clamping plate is fixed by friction, thus achieving rapid horizontal fixation of the workpiece.

[0033] Furthermore, the base has fixed limiting protrusions on both sides.

[0034] The limiting protrusion is generally used for test pieces with fixed lateral dimensions. When the lateral dimensions change, bases with different limiting widths can be selected.

[0035] Furthermore, the base is provided with at least two rows of parallel sliding grooves, and a limiting block is provided on each side of the sliding groove. The two ends of the limiting block are locked and fixed to the embedded studs at the bottom of the base by bolts passing through the sliding groove.

[0036] Setting at least two rows of sliding grooves can ensure that the limit block limits the angle of the instrument under test, and prevent the instrument under test from shifting its angle during the movement of the aging test trolley.

[0037] When the bolt is not fixed, the limiting block can move parallel within the sliding groove. Only when the object under test is placed on the base, the limiting block clamps the side of the instrument under test to prevent displacement. At this time, the wiring clamp of the instrument under test is aligned with the pin or socket on the back plate of the test fixture, thus physically preventing the connection direction from shifting. When the limiting block is adjusted to the appropriate position and presses the instrument under test, it is locked with the nut after the bolt passes through the sliding groove.

[0038] Furthermore, the socket has asymmetrically arranged pins on one end facing the clamping device. The pins have elastic needle tips and are electrically connected to the wiring clamping plate of the instrument being tested. The other end of the socket is connected to the adapter via a wire.

[0039] The socket consists of an elastic contact part and a signal lead-out part. The elastic contact part may be provided with an elastic needle tip structure, which includes a spring and a needle. The spring elasticity compensates for the assembly tolerance between the test piece and the back plate, ensuring that the needle tip and the test piece wiring clamp are in tight contact. The signal lead-out part is soldered to a cable with a silver-plated wire. The solder joint between the wire and the pin is sealed with insulating glue to prevent short circuit.

[0040] The pins are gold-plated to reduce the contact resistance of the measuring points. The AC power supply section has a reverse insertion prevention function. If the instrument is inserted in reverse, the power supply section will not have contact points and will not be able to supply power normally, thus preventing damage to the instrument from incorrect insertion.

[0041] The advantages and beneficial effects of this utility model are as follows:

[0042] Multiple error-proof positioning: A three-dimensional error-proof system is constructed by using asymmetric pins, clamps, and limit blocks to effectively avoid incorrect insertion of the device under test and reduce the test failure rate.

[0043] Fast and reliable fixation: The downward-pressing handle completes the front fixation within 5 seconds, and the limit block bolts are tightened to form a two-dimensional constraint, ensuring that the clamp does not loosen during vibration. This solves the problems of slow operation and easy loosening of traditional clamps and improves work efficiency.

[0044] Standardize cable management: Dedicated channels are used for cables, with physical isolation to prevent tangling and electromagnetic shielding to resist interference, improving cable maintenance efficiency. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the main framework;

[0046] Figure 2 This is a schematic diagram of the test fixture;

[0047] Figure 3 This is a schematic diagram of the test fixture in Example 2;

[0048] In the diagram: 1. Main frame; 2. Shelf; 3. Back panel; 4. Base; 5. Clamping device; 5a. Clamping plate; 5b. Handle; 6. Socket / pin; 7. Limiting block; 8. Sliding groove. Detailed Implementation

[0049] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this invention and should not be construed as limiting the scope of protection of this invention.

[0050] Example 1:

[0051] A type of error-proof aging test trolley, such as Figure 1 , Figure 2 As shown, the trolley main frame 1 has shelves 2 arranged at intervals along the height direction; characterized in that the shelves 2 are provided with test fixtures;

[0052] In this embodiment, the test fixture includes a clamp 5, a base 4 and a back plate 3 that are sequentially fixed on the shelf. The back plate 3 is provided with two rows of symmetrically distributed insertion holes 6, and the two rows of insertion holes 6 are respectively provided with asymmetrically arranged insertion pins 6.

[0053] The test fixture achieves the error prevention and fixation functions of the instrument under test through the cooperation of the base 4, the clamping device 5 and the back plate 3.

[0054] The asymmetrical arrangement of pins 6 within the socket 6 breaks the uniformity of symmetrical structures. Through differentiated layout design, it can accurately adapt to the interface requirements of different instruments under test, achieving one-to-one targeted electrical connection. This effectively avoids the risk of misinsertion caused by the regular arrangement of pins 6, and improves the accuracy and safety of testing.

[0055] The shelf 2 is also provided with a transition strip (not shown in the figure, usually set on both sides of the shelf). One end of the transition strip is electrically connected to the pin or pin 6 one by one through the cable, and the other end is connected to several cables with plugs.

[0056] The other end of the adapter is connected to an external testing instrument via several cables with connectors. One end of the adapter is electrically connected to pin 6 on the backplane 3 via a cable, ensuring that the signal from the instrument under test is accurately transmitted to the adapter, guaranteeing the stability and accuracy of signal transmission. The other end, connected to several cables with connectors, provides a standardized interface for subsequent signal output, facilitating quick and reliable connection with external testing equipment and control systems. Through the adapter's dual-connection design, the internal pin 6 signal and the external device interface are effectively integrated, forming a complete signal transmission link. This enables efficient data interaction between the test fixture, the instrument under test, and the external testing system, improving the convenience and compatibility of the testing process.

[0057] When operators perform aging tests, the adapter and pins are pre-connected by cables. Operators only need to place the instrument under test on the test clamp and fix it, without having to perform any wiring operations, which further reduces the misconnection rate.

[0058] Preferably, the base has fixed limiting protrusions on both sides.

[0059] The limiting protrusion is generally used for test pieces with fixed lateral dimensions. When the lateral dimensions change, bases with different limiting widths can be selected.

[0060] Preferably, the layer plates 2 on the main frame 1 are provided with a plurality of circular holes at intervals.

[0061] In this embodiment, the test fixture has bolt holes that match the circular hole, and anti-loosening washers are provided on the upper surface of the bolt holes to ensure that there is no loosening during vibration testing.

[0062] The circular holes correspond one-to-one with the bolt holes of the test fixture, and are used to achieve a detachable connection between the test fixture and the base 4 through bolts.

[0063] Preferably, in this embodiment, the circular holes are regularly spaced, with each shelf having at least four rows of circular holes in the width direction, and two rows forming a group, meaning at least two sets of test fixtures can be installed; and at least three rows of circular holes in the depth direction, with one set of test fixtures installed in every 3*2 circular holes, wherein the 2*2 holes are for installing the base, the 1*2 holes are for installing the back plate, and the clamps are separately fixedly installed at the front or rear end of the shelf.

[0064] In this embodiment, a ZTE universal wheel with brakes is installed at each of the four bottom corners of the main frame 1 to facilitate the overall movement and positioning of the trolley.

[0065] The position of the casters corresponds to the position of the guide rails and connectors in the aging chamber. The structure, size, and height of the main frame 1 match the structure of the aging chamber. The entry, exit, positioning, electrical signal connection, output detection, and power supply of the aging test trolley carrying the main frame 1 are consistent with the interface and direction inside the aging chamber. The trolley can maintain a certain safe distance from the surroundings when it enters.

[0066] Example 2:

[0067] like Figure 3 As shown, the difference from Embodiment 1 is that the base 4 of the test fixture in this embodiment is provided with at least two rows of parallel sliding grooves 8, and limit blocks 7 are provided on both sides of the two rows of sliding grooves 8. The two ends of the limit blocks 7 are locked and fixed to the embedded studs at the bottom of the back plate 3 by bolts passing through the sliding grooves 8.

[0068] Setting at least two rows of sliding grooves 8 can ensure that the limit block 7 limits the angle of the instrument under test, and prevent the instrument under test from shifting its angle during the movement of the aging test trolley.

[0069] When the bolt is not fixed, the limiting block 7 can move parallel within the sliding groove 8. Only when the object to be tested is placed on the base 4, the limiting block 7 clamps the side of the instrument to be tested to prevent displacement. At this time, the wiring clamp of the instrument to be tested is aligned with the pin 6 on the back plate 3 of the test fixture, thus physically preventing the connection direction from being offset. When the limiting block 7 is adjusted to a suitable position and presses the instrument to be tested, it is locked with the nut after the bolt passes through the sliding groove 8.

[0070] Preferably, in the test fixture, the base 4, the clamping device 5, and the back plate 3 are fixedly connected to the layer plate 2 on the main frame 1 by bolts passing through the round holes of the layer plate 2.

[0071] The back plate 3 is vertically fixed to one side of the base 4, and the clamping device 5 is horizontally fixed to the other side of the base 4. The back plate 3 is fixed close to the inner side of the main frame 1, and the clamping device 5 is fixed close to the outer side of the main frame 1.

[0072] In this embodiment, the clamping plate 5a is an aluminum alloy plate (8mm thick), and a nitrile rubber buffer layer (2mm thick, Shore A hardness 60A) is pasted on the side that contacts the test piece to avoid damaging the surface of the test piece.

[0073] Preferably, the clamping device consists of a clamping plate 5a and a handle 5b. A telescopic connecting column is provided between the clamping plate 5a and the handle 5b. One end of the connecting column is fixedly connected to the clamping plate, and the other end is connected to the handle through a hinge shaft, so that when the handle is turned, the connecting column can be driven to extend and retract, thereby causing the clamping plate to vertically clamp the instrument under test.

[0074] The clamping plate can move along a depth direction parallel to the upper surface of the layer plate by the telescopic movement of the connecting column.

[0075] This application defines the left-right direction as the width direction, the front-back direction as the depth direction, and the up-down direction as the height direction when facing the trolley.

[0076] In this embodiment, the handle 5b is a steel pressing structure with an elastic rubber pad at the bottom. When the clamping plate 5a contacts the front side of the test piece, the handle 5b is pressed down to make the rubber pad fit tightly against the upper surface of the layer plate 2. The position of the clamping plate 5a is fixed by friction, thereby achieving rapid horizontal fixation of the test piece.

[0077] Preferably, the socket 6 has asymmetrically arranged pins 6 at one end facing the clamping device 5. The pins 6 have elastic needle tip structures and are electrically connected to the wiring clamping plate of the instrument being tested. The other end of the socket 6 is connected to a cable via a wire.

[0078] In this embodiment, the socket 6 consists of an elastic contact part and a signal lead-out part. The elastic contact part may be provided with an elastic needle tip structure, which includes a spring and a needle. The spring elasticity compensates for the assembly tolerance between the test piece and the back plate 3, ensuring that the needle tip and the test piece wiring clamp are in close contact. The signal lead-out part is soldered to a cable through a silver-plated wire. The soldering point between the wire and the pin 6 is sealed with insulating glue to prevent short circuit.

[0079] In this embodiment, the pin 6 is gold-plated to reduce the contact resistance of its measuring point. The AC power supply section has a reverse insertion prevention function. It is designed that if the instrument is inserted in reverse, the power supply section will have no contact points and cannot supply power normally, thus preventing damage to the instrument from incorrect insertion.

[0080] Preferably, in this embodiment, each row of test fixtures is arranged at uniform intervals along the length of the shelf 2.

[0081] Preferably, in the test fixture, the base 4, the clamping device 5, and the back plate 3 are fixedly connected to the layer plate 2 on the main frame 1 by bolts passing through the round holes of the layer plate 2.

[0082] The back plate 3 is vertically fixed to one side of the base 4, and the clamping device 5 is horizontally fixed to the other side of the base 4. The back plate 3 is fixed close to the inner side of the main frame 1, and the clamping device 5 is fixed close to the outer side of the main frame 1.

[0083] Example 3:

[0084] The difference from the above embodiments is that, in this embodiment, the test fixtures are arranged in two rows of mirror symmetrical arrangement above the shelf 2 with the horizontal transverse central axis of the shelf 2 as the symmetry reference, and the back plates 3 of the two rows of test fixtures are arranged opposite each other, with the clamps facing outwards of the shelf 2 in a mirror symmetrical manner.

[0085] Preferably, an independent cable channel is formed between the two rows of test fixtures, and the cable is fastened to the layer 2 by a cable fastener (such as a cable tie or a buckle) in the cable channel.

[0086] In this embodiment, the shelf has at least 4 rows of circular holes in the width direction and at least 8 rows of circular holes in the depth direction. Two sets of test fixtures are mirror-mounted in every 6*2 circular holes. The 4*2 holes are used to mount the base, and the 2*2 holes are used to mount the back plate. The clamps are separately fixedly mounted on the front or rear end of the shelf. Two rows of circular holes are left in the middle of the two rows of test fixtures to fix the cable between the back plate and the adapter.

[0087] By using two rows of test fixture backplates, an independent cable channel is created in the central area. This design effectively avoids interference between cables and other components, ensuring signal transmission stability while also facilitating subsequent installation, inspection, and maintenance. Cables within the channel are secured to the shelves using cable clips, ensuring that they will not shift due to external forces such as pulling or vibration during use, preventing poor contact or line damage. This orderly securing optimizes cable arrangement, reduces electromagnetic interference, and improves the overall reliability and safety of the test fixture.

[0088] The independent cable channel is a U-shaped groove formed by the back plate 3 and the shelf plate 2 of two rows of test fixtures. The cables in the channel follow the U-shaped groove to avoid cable crossing. The input, output and communication tests of the aging vehicle signal use different aviation sockets with anti-misinsertion function to ensure the accuracy of signal input, output and communication data, reduce failures caused by human factors, ensure the effectiveness of the device and improve its working efficiency.

[0089] In this embodiment, each set of sockets adopts a triple error-proof design, consisting of mechanical key positioning, electrical interlocking, and an identification system. The mechanical key positioning is achieved by setting asymmetrical positioning keys (120° key angle difference) on the socket shell, preventing insertion in reverse. The electrical interlocking is achieved by a 2mm difference in the length of the power socket pins (PE pin is the longest), ensuring that grounding is connected before disconnection. The identification system uses laser-etched markings (3mm font height) on the socket panel, along with LED indicator lights (red for power, green for signal). The LED indicator lights up green when the cable is connected correctly and red when the cable is connected incorrectly.

[0090] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fault-proof aging test trolley, wherein shelves (2) are arranged at intervals along the height direction in the main frame (1) of the trolley; characterized in that, The shelf (2) is provided with a test fixture; The test fixture includes a clamp (5), a base (4) and a back plate (3) that are sequentially fixed on the shelf (2), wherein the back plate (3) is provided with a plurality of electrical connection sockets and / or pins (6). The shelf (2) is also provided with a cable adapter bar. One end of the adapter bar is electrically connected to the socket or pin (6) one by one through the cable, and the other end is connected to several cables with plugs.

2. The error-proof aging test trolley according to claim 1, characterized in that, The main frame (1) has several circular holes spaced apart on the layer plate (2).

3. The error-proof aging test trolley according to claim 2, characterized in that, The circular holes are distributed at regular intervals, and each layer (2) has at least four rows of circular holes in the width direction and at least three rows of circular holes in the depth direction.

4. The error-proof aging test trolley according to claim 1, characterized in that, The test fixtures are arranged in two rows with the horizontal transverse central axis of the shelf (2) as the symmetry reference and are set above the shelf (2). The back plates (3) of the two rows of test fixtures are set opposite to each other, and the clamps (5) are mirror-symmetrically facing the outside of the shelf.

5. The error-proof aging test trolley according to claim 4, characterized in that, An independent cable channel is formed between the two rows of test fixture back plates (3), and the cable is fastened to the layer plate (2) by a cable fastener in the cable channel.

6. The error-proof aging test trolley according to claim 1, characterized in that, The layer (2) has a row of regularly spaced test fixtures in the width direction, and the back of the test fixtures forms an independent cable channel.

7. The error-proof aging test trolley according to claim 1, characterized in that, The clamping device (5) consists of a clamping plate (5a) and a handle (5b); a telescopic connecting column is provided between the clamping plate (5a) and the handle (5b), one end of the connecting column is fixedly connected to the clamping plate (5a), and the other end is connected to the handle (5b) through a hinge shaft.

8. The error-proof aging test trolley according to claim 1, characterized in that, The base (4) has fixed limiting protrusions on both sides.

9. The error-proof aging test trolley according to claim 1, characterized in that, The base (4) is provided with at least two rows of parallel sliding grooves (8), and each side of the sliding groove (8) is provided with a limiting block (7). The two ends of the limiting block (7) are connected to the embedded nut at the bottom of the base (4) by bolts passing through the sliding groove (8).

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