Urea nozzle assembly Urea nozzle assembly

Abstract

The utility model relates to urea nozzle assembly field especially relates to urea nozzle assembly, including shell, the shell inside vertical setting has shell lining, the shell lining inside vertical installation has spouts core assembly, the shell top installs shell apron, the opening of shell apron one side edge installs wire harness waterproof pad, the utility model passes through setting wire harness waterproof pad and sealing ring installation groove, effectively prevent moisture from wire harness interface place to enter the shell inside, improved the waterproof performance and reliability of whole, guarantee the connecting point of pin and wire harness connector protection in a dry, clean environment, spouts core assembly through its top spouts core holder installation fixed in shell lining top, simplified assembly process, and liquid inlet pipe sets up in shell apron center, and with spouts core assembly direct connection, this kind of center straight through's layout makes urea solution supply path shorter, more smooth, effectively reduces fluid resistance and deposition risk, help guarantee the response speed and metering accuracy of injection.

Description

Technical Field

[0001] This utility model relates to the field of urea nozzle assembly technology, and more particularly to urea nozzle assembly. Background Technology

[0002] In the SCR (Selective Catalytic Reduction) system of diesel engines, the urea injector assembly is used to precisely inject urea solution into the exhaust system to reduce nitrogen oxide emissions. Existing urea injector assemblies often suffer from insufficient waterproofing in the wiring harness connection area, making them prone to water ingress in humid or vibrating environments, leading to short circuits or corrosion. Furthermore, the wiring harness fixing structure is not robust and is easily loosened by engine vibration, affecting signal transmission and reliability. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a urea nozzle assembly.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A urea nozzle assembly includes a housing, an inner liner vertically arranged inside the housing, a nozzle core assembly vertically installed inside the inner liner, a housing cover plate installed on the top of the housing, a wire harness waterproof pad installed at an opening on one side of the housing cover plate, and a wire harness plug fixing assembly connected to the bottom of the wire harness waterproof pad and located below the housing cover plate.

[0006] The wire harness plug fixing assembly includes an outer clamping plate, with upper clamping blocks symmetrically arranged on the top of the outer clamping plate. The upper clamping blocks are installed at the bottom of the wire harness waterproof pad, and a wire harness connector is provided on the side of the outer clamping plate facing the core assembly.

[0007] Furthermore, in a preferred configuration, the spray core assembly includes a coil housing, with a pin disposed on one outer wall of the coil housing, and a wire harness connector connected to the pin.

[0008] Furthermore, in a preferred configuration, the nozzle assembly is mounted on the top of the housing liner via a top-mounted nozzle holder, and an inlet pipe connected to the nozzle assembly is provided at the center of the housing cover.

[0009] Furthermore, a preferred configuration is that a wire harness pressure plate for pressing down the wire harness waterproof pad is installed on the upper surface of the outer casing cover.

[0010] In addition, a preferred structure is that the wire harness waterproof pad has a connection port in the middle, a sealing ring installation groove is opened on the side wall of the wire harness waterproof pad, and a slot is symmetrically opened at the bottom of the wire harness waterproof pad for the installation of the upper slot.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. This utility model effectively prevents moisture from entering the housing from the wire harness interface by setting a waterproof pad and sealing ring mounting groove, thereby improving the overall waterproof performance and reliability and ensuring that the connection points of the pins and wire harness connectors are protected in a dry and clean environment.

[0013] 2. The nozzle assembly is mounted and fixed to the top of the housing liner via the nozzle holder on its top, simplifying the assembly process.

[0014] 3. The liquid inlet pipe is located in the center of the outer shell cover and is directly connected to the spray core assembly. This central straight-through layout makes the urea solution supply path shorter and smoother, effectively reducing fluid resistance and deposition risk, and helping to ensure the spray response speed and metering accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the disassembled nozzle assembly;

[0016] Figure 2 This is a schematic diagram of the assembled nozzle assembly.

[0017] Figure 3 This is a schematic diagram of the internal structure of the nozzle assembly;

[0018] Figure 4 This is a schematic diagram of the nozzle assembly.

[0019] Figure 5 A schematic diagram of the wire harness plug fixing assembly;

[0020] Figure 6 This is a schematic diagram of the structure of the waterproof pad for the wire harness.

[0021] In the diagram: 1. Outer shell, 2. Inner shell liner, 3. Spray core assembly, 31. Coil shell, 32. Pin, 4. Spray core holder, 5. Wire harness plug fixing assembly, 51. Wire harness connector, 52. Outer clamping plate, 53. Upper clamping block, 6. Outer shell cover, 7. Wire harness pressure plate, 8. Wire harness waterproof pad, 81. Slot, 82. Sealing ring mounting slot, 83. Wiring port, 9. Liquid inlet pipe. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-6A urea nozzle assembly includes a housing 1, an inner housing liner 2 vertically arranged inside the housing 1, a nozzle core assembly 3 vertically installed inside the inner housing liner 2, a housing cover plate 6 installed on the top of the housing 1, a wire harness waterproof pad 8 installed at an opening on one side of the housing cover plate 6, a wire harness plug fixing assembly 5 connected to the bottom of the wire harness waterproof pad 8 and located below the housing cover plate 6, the wire harness plug fixing assembly 5 includes an outer clamping plate 52, upper clamping blocks 53 symmetrically arranged on the top of the outer clamping plate 52, the upper clamping blocks 53 are installed at the bottom of the wire harness waterproof pad 8, and a wire harness connector 51 is provided on the side of the outer clamping plate 52 facing the nozzle core assembly 3.

[0024] The core assembly 3 includes a coil housing 31, and a pin 32 is provided on one side of the outer wall of the coil housing 31. The wire harness connector 51 is connected to the pin 32.

[0025] In addition, the nozzle assembly 3 is mounted on the top of the housing liner 2 via the nozzle holder 4, and the housing cover 6 has an inlet pipe 9 connected to the nozzle assembly 3 at its center.

[0026] Meanwhile, a wire harness pressure plate 7 for pressing down the wire harness waterproof pad 8 is installed on the upper surface of the outer cover 6. A wiring port 83 is provided in the middle of the wire harness waterproof pad 8. A sealing ring mounting groove 82 is opened on the side wall of the wire harness waterproof pad 8. A slot 81 is symmetrically opened at the bottom of the wire harness waterproof pad 8 for installing the upper locking block 53.

[0027] In this embodiment, the pin 32 is the transmission terminal for electrical signals and power. It extends from the coil housing 31 of the injector assembly 3. Its core function is to transmit control signals and power from the vehicle ECU (vehicle computer) to the electromagnetic coil inside the injector assembly 3. When the ECU needs to inject urea, it will send an electrical signal. This electrical signal is conducted to the wiring harness connector 51 through the vehicle's wiring harness connection terminal 83. The wiring harness connector 51 has a female terminal interface that matches the pin 32. The wiring harness connector 51 and the pin 32 are connected in circuit. Current flows through the pin 32, activating the electromagnetic coil inside the injector assembly 33, generating a magnetic field, driving the valve needle to move, thereby opening or closing the injection of urea solution.

[0028] An O-ring can be installed in the sealing ring mounting groove 82 on its side wall. When the wire harness waterproof pad 8 is pressed into the opening of the housing cover plate 6, the sealing ring will deform and fit tightly against the inner wall of the opening, forming the first waterproof barrier to prevent water from entering from the side gaps and ensure that the connection point of the pin 32 and the wire harness connector 51 is protected in a dry and clean environment.

[0029] In this invention, by setting the wire harness waterproof pad 8 and the sealing ring mounting groove 82, moisture is effectively prevented from entering the housing from the wire harness interface, which improves the overall waterproof performance and reliability, and ensures that the connection point of the pin 32 and the wire harness connector 51 is protected in a dry and clean environment.

[0030] The nozzle assembly 3 is mounted and fixed to the top of the housing liner 2 via the nozzle holder 4 on its top, so that the installation and removal of the nozzle assembly 3 does not require complicated tools, simplifying the assembly process.

[0031] The liquid inlet pipe 9 is located at the center of the outer casing cover plate 6 and is directly connected to the spray core assembly 3. This central straight-through layout makes the urea solution supply path shorter and smoother, effectively reducing fluid resistance and deposition risk, and helping to ensure the spray response speed and metering accuracy.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A urea nozzle assembly, comprising a housing (1), characterized in that, The outer shell (1) is vertically provided with an inner shell liner (2), and the inner shell liner (2) is vertically installed with a spray core assembly (3). The top of the outer shell (1) is provided with an outer shell cover plate (6). A wire harness waterproof pad (8) is installed at an opening on one side of the outer shell cover plate (6). A wire harness plug fixing assembly (5) is connected to the bottom of the wire harness waterproof pad (8) and located below the outer shell cover plate (6). The wire harness plug fixing assembly (5) includes an outer clamping plate (52), and an upper clamping block (53) is symmetrically arranged on the top of the outer clamping plate (52). The upper clamping block (53) is installed at the bottom of the wire harness waterproof pad (8). A wire harness connector (51) is arranged on the side of the outer clamping plate (52) facing the core assembly (3).

2. The urea nozzle assembly according to claim 1, characterized in that, The core assembly (3) includes a coil housing (31), and a pin (32) is provided on one side of the outer wall of the coil housing (31). The wire harness connector (51) is connected to the pin (32).

3. The urea nozzle assembly according to claim 1, characterized in that, The nozzle assembly (3) is mounted on the top of the outer shell liner (2) via a nozzle holder (4) mounted on the top. A liquid inlet pipe (9) connected to the nozzle assembly (3) is provided at the center of the outer shell cover plate (6).

4. The urea nozzle assembly according to claim 1, characterized in that, A wire harness pressure plate (7) for pressing down the wire harness waterproof pad (8) is installed on the upper surface of the outer casing cover (6).

5. The urea nozzle assembly according to claim 4, characterized in that, The wire harness waterproof pad (8) has a connection port (83) in the middle, a sealing ring installation groove (82) is provided on the side wall of the wire harness waterproof pad (8), and a slot (81) is symmetrically provided at the bottom of the wire harness waterproof pad (8). The slot (81) is used for the installation of the upper slot (53).

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