Fixing tool for aging detection of wire harness of nitrogen-oxygen sensor

Abstract

The utility model provides a fixing tool for aging detection of a wire harness of a nitrogen-oxygen sensor, which comprises a base, at least one group of placing components are fixedly mounted on the base, each placing component comprises a placing plate fixedly connected to the base, a placing groove is formed in each placing plate, a wire harness plug is placed in each placing groove and is matched with the wire harness plug, and the placing plates are fixedly connected to the base. A fixing assembly is fixedly connected to the placing assembly, the fixing assembly is connected with a wire harness plug in an inserted mode through a connecting piece, and the connecting piece is electrically connected with aging detection equipment. According to the utility model, the problem of inaccurate data caused by aging failure or incomplete aging due to poor stability during connection during aging detection of the nitrogen-oxygen sensor probe can be solved, and the detection effect is improved.

Description

Technical Field

[0001] This utility model belongs to the field of gas sensor production and testing technology, and in particular relates to a fixture for aging detection of nitrogen and oxygen sensor wiring harnesses. Background Technology

[0002] Nitrogen oxides (NO) x Nitrogen oxides (NO) are a mixture of NO and NO2, and are one of the most environmentally harmful exhaust gases emitted by automobile engines. In my country's automobile exhaust emission limits, nitrogen oxides are listed as a key exhaust emission limit target.

[0003] Currently, the mainstream technology for controlling nitrogen oxide emissions from engine exhaust (including gasoline and diesel engines) is the Selective Catalytic Reduction (SCR) system. The principle behind this technology is that the Electronic Control Unit (ECU) controls the urea spraying unit to spray a urea solution into the exhaust pipe. At exhaust temperatures, the urea undergoes pyrolysis and hydrolysis to release ammonia. The ammonia then reacts with nitrogen oxides in the exhaust gas in the SCR catalyst, regenerating N2 and H2O, thus reducing nitrogen oxide emissions from the engine.

[0004] As one of the most critical components of the SCR aftertreatment system, the automotive nitrogen oxide sensor detects the nitrogen oxide concentration in the exhaust gas during engine operation, ensuring that nitrogen oxide emissions are within regulatory limits. It then transmits the detection data in real-time to the vehicle's ECU via the CAN bus. x The accuracy, sensitivity, and stability of gas concentration have high performance and precision requirements, directly affecting the NOx content in vehicle exhaust emissions. With increasingly stringent emission regulations, the demand for NOx sensors in vehicles is growing rapidly. NOx sensor products consist of a wiring harness assembly (including probes and cables) and a controller. Before the wiring harness assembly is assembled with the controller, the probe needs to undergo aging treatment to ensure that oxides on the NOx chip are largely removed and the electrochemical reaction stabilizes, thus optimizing the sensor's performance. Currently, NOx sensor probes typically use spring-loaded probes for aging testing, resulting in poor connection stability. Alternatively, the plug is directly soldered to the circuit board, meaning that if the wiring harness malfunctions, the circuit board is also scrapped, wasting raw materials and increasing production costs. Therefore, a fixture for aging testing of NOx sensor wiring harnesses is urgently needed to solve these problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model proposes a fixing fixture for aging detection of nitrogen and oxygen sensor wire harnesses.

[0006] To achieve the above objectives, this utility model provides a fixing fixture for aging detection of nitrogen and oxygen sensor wiring harnesses, including a base. At least one set of placement components is fixedly installed on the base. Each placement component includes a placement plate fixedly attached to the base. A placement slot is formed in the placement plate, and a wiring harness plug is placed in the placement slot and is adapted to the wiring harness plug. A fixing component is fixedly attached to the placement component. The fixing component is plugged into the wiring harness plug through a connector. The connector is electrically connected to an aging detection device.

[0007] Preferably, the placement assembly further includes a bracket fixed to the base, the bracket having a limiting groove, one end of the limiting groove near the base being fixed to the placement plate, and the fixing assembly being fixed inside the bracket.

[0008] Preferably, the fixing component includes a push-pull quick clamp fixedly connected to the top of the bracket, and the moving end of the push-pull quick clamp is fixedly connected to a connector.

[0009] Preferably, the push-pull quick clamp includes a positioning seat fixedly connected to the bracket, a handle hinged to the positioning seat, a movable connecting rod hinged inside the handle, a clamping piston hinged to the movable connecting rod, a bolt internally threaded onto the clamping piston, a limit ring fixedly connected to the positioning seat, the clamping piston sleeved inside the limit ring, a nut provided at the end of the clamping piston away from the movable connecting rod, the nut being threadedly connected to the bolt, and a connecting piece fixedly connected at the end of the bolt away from the clamping piston.

[0010] Preferably, the connector includes a plug-in assembly that is fixed to the bolt, the plug-in assembly being inserted into the wiring harness plug, the plug-in assembly being connected to a quick-connect terminal via a wire, the quick-connect terminal being fixed to the rear end of the bracket, and the quick-connect terminal being connected to the aging detection equipment.

[0011] Preferably, the limiting groove has grooves on both sides, and the two sides of the plug are fixedly connected to protrusions, with the grooves slidably connected to the protrusions.

[0012] Preferably, the base has several positioning holes, which are fixed to the aging test equipment by positioning pins.

[0013] Compared with the prior art, the present invention has the following advantages and technical effects: the wire harness plug is placed in the placement slot, and then the fixing component is used to connect the connector to the wire harness plug. The placement slot and the fixing component can limit the horizontal and vertical direction of the wire harness plug, which further enhances the positioning effect of the wire harness plug and avoids the shaking problem that may occur during subsequent aging tests.

[0014] This invention can improve the detection effect by addressing the problem of inaccurate data caused by poor connection stability during aging detection of nitrogen and oxygen sensor probes, which leads to aging failure or incomplete aging. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the bracket and placement plate of this utility model;

[0019] Figure 4 This is a schematic diagram of the plug-in structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the push-pull quick clamp of this utility model;

[0021] In the diagram: 1. Base; 2. Wire harness plug; 3. Placement plate; 4. Placement slot; 5. Bracket; 6. Limiting slot; 7. Push-pull quick clamp; 8. Connecting plug; 9. Wire; 10. Quick-connect terminal; 11. Groove; 12. Protrusion; 13. Positioning hole; 14. Positioning seat; 16. Handle; 17. Movable connecting rod; 18. Clamping piston; 19. Bolt; 20. Limiting ring; 21. Nut. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Reference Figures 1-5As shown, this utility model provides a fixing fixture for aging detection of nitrogen and oxygen sensor wire harnesses, including a base 1. At least one set of placement components are fixedly installed on the base 1. The placement components include a placement plate 3 fixedly connected to the base 1. A placement groove 4 is opened in the placement plate 3. A wire harness plug 2 is placed in the placement groove 4 and is adapted to the wire harness plug 2. A fixing component is fixedly connected to the placement component. The fixing component is plugged into the wire harness plug 2 through a connector. The connector is electrically connected to an aging detection device.

[0025] Place the wire harness plug 2 into the placement slot 4, and then use the fixing component to connect the connector to the wire harness plug 2. The placement slot 4 and the fixing component can limit the horizontal and vertical direction of the wire harness plug 2, further enhancing the positioning effect of the wire harness plug 2 and avoiding the shaking problem that may occur during subsequent aging tests.

[0026] Further optimization of the design includes a bracket 5 fixed to the base 1. A limiting groove 6 is provided inside the bracket 5, and a placement plate 3 is fixed to one end of the limiting groove 6 near the base 1. A fixing component is fixed inside the bracket. The limiting groove 6 is used to limit the placement plate 3 and the connector, facilitating their connection and subsequent horizontal and vertical limiting of the wire harness plug 2.

[0027] The design is further optimized by including a push-pull quick clip 7 fixedly connected to the top of the bracket 5, with a connector fixedly connected to the moving end of the push-pull quick clip 7. The push-pull quick clip 7 can move along with the connector and subsequently connect to the wire harness plug 2, ensuring the wire harness plug 2 is securely fixed.

[0028] Further optimizing the design, the push-pull quick clamp 7 includes a positioning seat 14 fixedly connected to the bracket 5. A handle 16 is hinged to the positioning seat 14. A movable connecting rod 17 is hinged inside the handle 16. A clamping piston 18 is hinged to the movable connecting rod 17. A bolt 19 is threadedly connected to the clamping piston 18. A limit ring 20 is fixedly connected to the positioning seat 14. The clamping piston 18 is sleeved inside the limit ring 20. A nut 21 is provided at the end of the clamping piston 18 away from the movable connecting rod 17. The nut 21 is threadedly connected to the bolt 19. A connector is fixedly connected to the end of the bolt 19 away from the clamping piston 18. The positioning seat 14 can be fixedly installed with the bracket 5. The handle 16 can be used to operate the movable connecting rod 17. The limit ring 20 can move the clamping piston 18 in the vertical direction without deviation. The length of the bolt 19 entering the clamping piston 18 can be adjusted, and then it is fixed by the nut 21. This can meet the clamping requirements of different heights. Finally, rotating the handle 16 can move the bolt 19 with the connecting piece.

[0029] The design is further optimized. The connector includes a mating plug 8 fixed to bolt 19. The mating plug 8 is inserted into the wire harness plug 2. The mating plug 8 is connected to a quick-connect terminal 10 via a wire 9. The quick-connect terminal 10 is fixed to the rear end of the bracket 5 and is connected to the aging test equipment. The mating plug 8 can be inserted into the wire harness plug 2, which serves two purposes: positioning it and allowing it to be connected to the quick-connect terminal 10 for aging test.

[0030] In a further optimized design, grooves 11 are provided on both sides of the limiting groove 6, and protrusions 12 are fixedly connected to both sides of the plug-in 8. The grooves 11 are slidably connected to the protrusions 12. The grooves 11 can be slidably connected to the protrusions 12, which can limit the plug-in 8 and prevent it from tilting.

[0031] To further optimize the design, the base 1 is provided with several positioning holes 13, which are fixed to the aging test equipment via positioning pins. The positioning holes 13 allow the entire device to be installed with the aging test equipment.

[0032] Working principle:

[0033] Place the wire harness plug 2 into the placement slot 4, then turn the handle 16 so that the bolt 19, along with the plug 8, is inserted into the wire harness plug 2. After insertion, the wire harness plug 2 can be connected to the aging test equipment through the quick-connect terminal 10 to perform aging test on the probe of the nitrogen and oxygen sensor.

[0034] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A fixture for aging detection of nitrogen and oxygen sensor wiring harnesses, characterized in that: The device includes a base (1), on which at least one set of placement components are fixedly installed. The placement components include a placement plate (3) fixedly attached to the base (1), and a placement slot (4) is provided in the placement plate (3). A wire harness plug (2) is placed in the placement slot (4) and is adapted to the wire harness plug (2). A fixing component is fixedly attached to the placement component. The fixing component is plugged into the wire harness plug (2) through a connector. The connector is electrically connected to an aging detection device.

2. The fixture for aging detection of nitrogen and oxygen sensor harnesses according to claim 1, characterized in that: The placement assembly also includes a bracket (5) fixed to the base (1), a limiting groove (6) is provided in the bracket (5), the placement plate (3) is fixed to one end of the limiting groove (6) near the base (1), and the fixing assembly is fixed in the bracket.

3. The fixture for aging detection of nitrogen and oxygen sensor harnesses according to claim 2, characterized in that: The fixing component includes a push-pull quick clamp (7) fixedly connected to the top of the bracket (5), and the moving end of the push-pull quick clamp (7) is fixedly connected to a connector.

4. The fixture for aging detection of nitrogen and oxygen sensor harnesses according to claim 3, characterized in that: The push-pull quick clamp (7) includes a positioning seat (14) fixedly connected to the bracket (5). A handle (16) is hinged to the positioning seat (14). A movable connecting rod (17) is hinged inside the handle (16). A clamping piston (18) is hinged to the movable connecting rod (17). A bolt (19) is threadedly connected to the clamping piston (18). A limit ring (20) is fixedly connected to the positioning seat (14). The clamping piston (18) is sleeved inside the limit ring (20). A nut (21) is provided at the end of the clamping piston (18) away from the movable connecting rod (17). The nut (21) is threadedly connected to the bolt (19). A connector is fixedly connected at the end of the bolt (19) away from the clamping piston (18).

5. The fixture for aging detection of nitrogen and oxygen sensor wiring harnesses according to claim 4, characterized in that: The connector includes a plug-in (8) fixed to the bolt (19), the plug-in (8) being inserted into the wire harness plug (2), the plug-in (8) being connected to a quick-connect terminal (10) via a wire (9), the quick-connect terminal (10) being fixed to the rear end of the bracket (5), and the quick-connect terminal (10) being connected to an aging detection device.

6. The fixture for aging detection of nitrogen and oxygen sensor harnesses according to claim 5, characterized in that: The limiting groove (6) has grooves (11) on both sides, and the plug-in (8) has protrusions (12) fixed on both sides. The grooves (11) are slidably connected to the protrusions (12).

7. The fixture for aging detection of nitrogen and oxygen sensor wiring harnesses according to claim 1, characterized in that: The base (1) has several positioning holes (13), and the positioning holes (13) are fixed to the aging test equipment by positioning pins.

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