Urea quality liquid level sensor for glue pouring at top of controller

Abstract

The utility model discloses a urea quality liquid level sensor for glue pouring at the top of a controller, and belongs to the technical field of urea quality liquid level sensors. Comprising a top plastic part structure which comprises a main plastic part and a plastic upper cover arranged on one side of the main plastic part, the interior of the plastic upper cover is hollow, and a controller is arranged on the upper wall of the interior of the plastic upper cover and is prevented from being soaked by water; the first wire harness structure is arranged on one side of the top plastic part structure and comprises a first wire harness assembly, one end of the first wire harness assembly is connected to the controller, the other end of the first wire harness assembly penetrates through the main plastic part and is provided with a first connector, a first buckle is arranged on the side wall of the first connector, a first protective sleeve is arranged at one end of the first connector, and a binding belt is arranged on the outer side of the first wire harness assembly in a surrounding mode. The electromagnetic valve assembly structure is arranged on the other side of the main plastic part; the urea quality liquid level sensor is arranged on the lower side of the top plastic part structure; the sealing structure is arranged between the urea quality liquid level sensor and the top plastic part structure; the connecting part of the first wire harness assembly and the controller is filled with colloid for sealing, so that moisture and dust are prevented from invading.

Description

Technical Field

[0001] The utility model belongs to the technical field of urea quality liquid level sensors, and particularly relates to a urea quality liquid level sensor with glue pouring on the top of a controller. Background Art

[0002] In the SCR post-treatment system, the urea quality liquid level sensor is an essential unit for monitoring urea solution, integrating multiple functions such as urea solution temperature measurement, liquid level measurement, concentration measurement, urea suction, urea return, and urea heating and thawing. The head of the urea quality liquid level sensor is wrapped by a toothed chuck and is installed and connected to the toothed bayonet on the urea tank through the toothed chuck. During operation, the urea quality liquid level sensor concentrates the measured urea solution signals into the controller for processing and sends them to the ECU through the CAN transmission method.

[0003] In the current structure of the urea quality liquid level sensor, the controller is made into a separate module by low-pressure injection molding process and then integrated into the plastic head of the urea quality liquid level sensor by means of plug-in. In the above design, there are often problems of plug-in connection failure and low-pressure injection molding water ingress, resulting in controller failure and electrical performance failure of the urea quality liquid level sensor. Therefore, how to improve the connection method of the urea quality liquid level sensor controller and avoid electrical performance failure caused by controller water ingress has become an urgent technical problem for those skilled in the art. Summary of the Utility Model

[0004] The utility model provides a urea quality liquid level sensor with glue pouring on the top of a controller to solve the above problems.

[0005] The technical solution adopted by the utility model is as follows: A urea quality liquid level sensor with glue pouring on the top of a controller, comprising:

[0006] A top plastic part structure, at least including: a main plastic part, a plastic upper cover arranged on one side of the main plastic part, the inside of the plastic upper cover is hollow, and the controller is arranged on the inner upper wall of the plastic upper cover;

[0007] A first wire harness structure, arranged on one side of the top plastic part structure; the first wire harness structure includes: a first wire harness assembly, one end of the first wire harness assembly is connected to the controller, the other end passes through the main plastic part and is installed with a first connector, a first buckle is arranged on the side wall of the first connector, a first protective sleeve is arranged at one end of the first connector, and a tie strap is arranged around the outside of the first wire harness assembly;

[0008] An electromagnetic valve assembly structure, arranged on the other side of the main plastic part;

[0009] A urea quality liquid level sensor, arranged on the lower side of the top plastic part structure;

[0010] A sealing structure is arranged between the urea quality liquid level sensor and the top plastic part structure;

[0011] The connection part between the first wire harness assembly and the controller is filled with colloid for sealing.

[0012] Preferably, the first wire harness assembly includes: a concentration measurement signal wire, a temperature measurement signal wire, a liquid level measurement signal wire, and a total assembly signal transmission wire harness.

[0013] Preferably, the solenoid valve assembly structure includes: a bracket arranged on the top plastic part structure, a fixing piece arranged on the top plastic part structure, an interface assembly communicated with the top plastic part structure, and a second wire harness structure connected to the interface assembly.

[0014] Preferably, the interface assembly includes: a valve body water inlet connected to the bracket, a urea liquid suction interface connected to the bracket and arranged on one side of the valve body water inlet, a urea return liquid interface connected to the fixing piece, and a cooling water interface connected to the fixing piece and arranged on one side of the urea return liquid interface.

[0015] Preferably, the second wire harness structure includes: a coil connected to the valve body water inlet, a second connector connected to the end of the coil, a protective tube arranged outside the coil, a second buckle arranged on the side wall of the second connector, a second protective sleeve arranged at one end of the second connector, and the protective tube is connected to the second protective sleeve.

[0016] Preferably, the sealing structure includes: a first sealing ring and several sealing components arranged between the urea quality liquid level sensor and the top plastic part structure, and the sealing components include: a first sealing ring connected to the urea quality liquid level sensor, a second sealing ring connected to the top plastic part structure, and a second sealing ring connected between the first sealing ring and the second sealing ring.

[0017] The beneficial effects of the present utility model: Compared with the prior art, the controller of the present utility model is arranged on the inner upper wall of the plastic upper cover. When water enters the head of the urea quality liquid level sensor, the controller will not be soaked in water; the connection part between the first wire harness assembly and the controller is filled with colloid for sealing, preventing the intrusion of moisture and dust, enhancing the sealing performance of the overall structure, avoiding the leakage risk caused by water immersion, and greatly improving the waterproof performance of the overall design structure. The installation position of the solenoid valve assembly structure is relatively high and is not easily affected by the external environment. By setting the sealing structure, the protection of the sealing components is enhanced, and the risk of sealing failure is reduced. The first wire harness structure and the second wire harness structure enhance the protection of the wire harness and reduce the damage to the wire harness by the external environment. By arranging a bracket and a fixing piece on the top plastic part structure, the fixing property of the solenoid valve assembly structure is enhanced. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural view of the present utility model;

[0019] Figure 2 is a schematic semi-sectional structural view of the present utility model;

[0020] Figure 3 is an enlarged schematic structural view of part A;

[0021] Figure 4 is a schematic view of a part of the structure of the present utility model.

[0022] In the drawings, the list of components represented by each reference numeral is as follows: top plastic part structure 1, main plastic part 2, plastic upper cover 3, controller 4, first connector 5, first buckle 6, first protective sleeve 7, cable tie 8, solenoid valve assembly structure 9, urea quality liquid level sensor 10, sealing structure 11, concentration measurement signal wire 12, temperature measurement signal wire 13, liquid level measurement signal wire 14, assembly signal transmission wire harness 15, bracket 16, fixing piece 17, interface assembly 18, second wire harness structure 19, valve body water inlet 20, urea suction interface 21, urea return liquid interface 22, cooling water interface 23, second connector 24, protective tube 25, second buckle 26, second protective sleeve 27, first sealing ring 28, first sealing ring 29, second sealing ring 30, second sealing ring 31. Detailed Description of the Preferred Embodiments

[0023] The following further describes the present utility model in conjunction with the specification and embodiments, which can enable those skilled in the art to more comprehensively understand the present utility model, but does not limit the present utility model in any way.

[0024] To solve the technical problems existing in the background art, this embodiment discloses a urea quality liquid level sensor with potting on the top of the controller, as Figures 1 to 4As shown in the figure, it includes: a top plastic part structure 1, which at least includes: a main plastic part 2, a plastic upper cover 3 arranged on one side of the main plastic part 2. The inside of the plastic upper cover 3 is hollow, and the controller 4 is integrated on the inner upper wall of the plastic upper cover 3 through a bayonet mounting method; a first wire harness structure is arranged on one side of the top plastic part structure 1; the first wire harness structure includes: a first wire harness assembly. One end of the first wire harness assembly is welded to the controller 4, and the other end passes through the main plastic part 2 and is equipped with a first connector 5. A first buckle 6 is arranged on the side wall of the first connector 5, a first protective sleeve 7 is arranged at one end of the first connector 5, and a cable tie 8 is arranged around the outer circumference of the first wire harness assembly; the first wire harness assembly includes: a concentration measurement signal wire 12, a temperature measurement signal wire 13, a liquid level measurement signal wire 14, and a total signal transmission wire harness 15, which is used to transmit the sensor total signal, realizing the classified management of signal wires and reducing signal interference. By arranging a cable tie 8 around the outer circumference of the first wire harness assembly, the protection of the wire harness is enhanced, and the damage to the wire harness by the external environment is reduced. The connection part between the first wire harness assembly and the controller 4 is filled with colloid for sealing, enhancing the sealing of the overall structure and preventing the intrusion of moisture and dust. The urea solution concentration, liquid level, and temperature signals detected by the urea quality liquid level sensor 10 are respectively transmitted to the controller 4 through the concentration measurement signal wire 12, the temperature and liquid level measurement signal wire 14, and then sent to the external controller 4 unit ECU through the total signal transmission wire harness 15 after centralized processing by the controller 4.

[0025] In a further embodiment, the solenoid valve assembly structure 9 is arranged on the other side of the main plastic part 2; it includes: a bracket 16 arranged on the top plastic part structure 1, a fixing piece 17 arranged on the top plastic part structure 1, an interface component 18 communicated with the top plastic part structure 1, and a second wire harness structure 19 connected to the interface component 18. The interface component 18 includes: a valve body water inlet 20 connected to the bracket 16, a urea suction interface 21 connected to the bracket 16 and arranged on one side of the valve body water inlet 20, a urea return liquid interface 22 connected to the fixing piece 17, and a cooling water interface 23 connected to the fixing piece 17 and arranged on one side of the urea return liquid interface 22. By arranging the bracket 16 and the fixing piece 17, the fixing of the solenoid valve assembly structure 9 is enhanced, and the influence of the external environment is reduced. The design of the interface component 18 and the second wire harness structure 19 simplifies the layout of the solenoid valve assembly structure 9 and reduces the risk of connection looseness or leakage. The valve body water inlet 20, the urea suction interface 21, the urea return liquid interface 22, and the cooling water interface 23 realize the classification and fixation of the interface component 18, reducing the risk of connection looseness or leakage. The solenoid valve assembly structure 9 is used to control the opening and closing of the coolant inlet. The urea return liquid interface 22 is an interface for the external urea solution to flow back, the urea suction interface 3 is an interface for extracting the external urea solution, the cooling water interface 23 is an interface for the external coolant to flow to, and the interface fixing piece 17 is used to fix the urea return liquid interface 22 and the urea suction interface 21 on the head plastic part.

[0026] In a further embodiment, the second wire harness structure 19 includes: a coil connected to the water inlet 20 of the valve body, a second connector 24 connected to the end of the coil, a protective tube 25 disposed outside the coil, a second buckle 26 provided on the side wall of the second connector 24, a second protective sleeve 27 provided at one end of the second connector 24, and the protective tube 25 is connected to the second protective sleeve 27. The protection and fixation of the wire harness are enhanced, and the damage or signal interference of the wire harness is reduced. By providing the second buckle 26 on the side wall of the second connector 24, the connection stability of the wire harness is enhanced, and the risk of connection looseness or damage is reduced.

[0027] In a further embodiment, the urea quality level sensor 10 is disposed below the top plastic part structure 1; the sealing structure 11 is disposed between the urea quality level sensor 10 and the top plastic part structure 1; the sealing structure 11 includes: a first sealing ring 28 and a plurality of sealing components disposed between the urea quality level sensor 10 and the top plastic part structure 1, and the sealing components include: a first sealing ring 29 connected to the urea quality level sensor 10, a second sealing ring 30 connected to the top plastic part structure 1, and a second sealing ring 31 connected between the first sealing ring 29 and the second sealing ring 30. The first sealing ring 28 is used for the assembly seal of the sensor assembly and the external urea tank, and the sealing components are used for assembly limit and guiding functions, enhancing the protection of the sealing components and reducing the risk of sealing failure.

[0028] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A urea quality liquid level sensor with potting glue on the top of the controller, characterized in that: Including: A top plastic part structure, at least including: a main plastic part, a plastic upper cover arranged on one side of the main plastic part, the interior of the plastic upper cover is hollow, and a controller is arranged on the inner upper wall of the plastic upper cover; A first wire harness structure, arranged on one side of the top plastic part structure; the first wire harness structure includes: a first wire harness assembly, one end of the first wire harness assembly is connected to the controller, the other end passes through the main plastic part and is installed with a first connector, a first buckle is arranged on the side wall of the first connector, a first protective sleeve is arranged at one end of the first connector, and a cable tie is arranged around the outer side of the first wire harness assembly; A solenoid valve assembly structure, arranged on the other side of the main plastic part; A urea quality liquid level sensor, arranged on the lower side of the top plastic part structure; A sealing structure, arranged between the urea quality liquid level sensor and the top plastic part structure; The connection part between the first wire harness assembly and the controller is filled with glue for sealing.

2. The urea quality liquid level sensor with top potting of the controller according to claim 1, characterized in that: The first wire harness assembly includes: a concentration measurement signal line, a temperature measurement signal line, a liquid level measurement signal line, and a total signal transmission wire harness.

3. The urea quality liquid level sensor with potting on the top of the controller according to claim 2, characterized in that: The solenoid valve assembly structure includes: a bracket arranged on the top plastic part structure, a fixing piece arranged on the top plastic part structure, an interface assembly communicated with the top plastic part structure, and a second wire harness structure connected to the interface assembly.

4. A urea quality liquid level sensor with top potting for a controller according to claim 3, characterized in that, The interface assembly includes: a valve body water inlet connected to the bracket, a urea suction liquid interface connected to the bracket and arranged on one side of the valve body water inlet, a urea return liquid interface connected to the fixing piece, and a cooling water interface connected to the fixing piece and arranged on one side of the urea return liquid interface.

5. A urea quality liquid level sensor with top potting for a controller according to claim 4, characterized in that, The second wire harness structure includes: a coil connected to the valve body water inlet, a second connector connected to the end of the coil, a protective tube arranged outside the coil, a second buckle arranged on the side wall of the second connector, a second protective sleeve arranged at one end of the second connector, and the protective tube is connected to the second protective sleeve.

6. The urea quality liquid level sensor with top potting for the controller according to claim 5, characterized in that, The sealing structure includes: a first sealing ring and a plurality of sealing components arranged between the urea quality liquid level sensor and the top plastic part structure, the sealing components include: a first sealing ring connected to the urea quality liquid level sensor, a second sealing ring connected to the top plastic part structure, and a second sealing ring connected between the first sealing ring and the second sealing ring.

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