Urea spraying device, urea tank and vehicle

Abstract

The invention discloses a urea spraying device, a urea tank and a vehicle, and relates to the technical field of automobiles. The urea spraying device comprises a urea sensor assembly, a first connecting part and a second connecting part. The first connecting part is arranged at one end of the urea sensor assembly and is used for being connected with the top of a urea tank; the second connecting part is arranged at the end, away from the first connecting part, of the urea sensor assembly, is of an elastic structure and is used for being connected with the bottom face of the inner wall of a urea tank. Based on the technical scheme disclosed by the invention, the urea spraying device can be fixed at multiple points, the stability of the overall structure of the urea spraying device can be improved, shaking of the urea spraying device can be reduced, the use experience of a user can be improved, and the overall reliability can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, specifically to a urea injection device, a urea tank, and a vehicle. Background Technology

[0002] The urea tank on a vehicle is a core component of the Selective Catalytic Reduction (SCR) system, primarily used to store and supply automotive urea to reduce nitrogen oxide (NOx) emissions from diesel vehicle exhaust. Currently, domestically produced urea tanks generally utilize a non-metallic thin-walled structure, with flanges for fixing the urea injection device mounted on the upper surface of the tank.

[0003] In related technologies, because the upper surface of the urea tank is a thin-walled planar structure, and the entire urea injection device is fixed to this plane only by a single planar flange, the urea injection device is prone to shaking when installed and used on a vehicle. This shaking is especially noticeable when the urea injection device is heavy, which seriously affects the user experience. In severe cases, it may even cause the urea injection device to detach from the urea tank flange or be damaged. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and to propose a urea injection device, a urea tank, and a vehicle, thereby solving the technical problem that the urea injection device in the prior art is prone to shaking, which affects the user experience.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a urea injection device, comprising: Urea sensor assembly; A first connecting part is disposed at one end of the urea sensor assembly for connecting to the top of the urea tank; and The second connecting part is located at the end of the urea sensor assembly away from the first connecting part, and it is an elastic structure used to connect to the bottom surface of the inner wall of the urea tank.

[0006] In some embodiments, the second connecting part is an elastic support member, which is fixedly disposed at the bottom of the urea sensor assembly and is used to abut against and squeeze the bottom surface of the inner wall of the urea tank.

[0007] In some embodiments, the resilient support includes: A first fixing part, located on the side of the elastic support member near the urea sensor assembly, is used for fixed connection with the urea sensor assembly; and The second fixing part is located on the side of the elastic support away from the first fixing part, and is used to abut against and squeeze the bottom surface of the inner wall of the urea tank; The cross-sectional dimension of the second fixing part is larger than that of the first fixing part.

[0008] In some embodiments, the structure of the elastic support member is any one of a disc structure, a conical structure, and a square structure.

[0009] In some embodiments, the elastic support is a hollow structure and has a bottom opening formed at the second fixing part, the bottom opening gradually increasing in the direction away from the urea sensor assembly.

[0010] In some embodiments, the elastic support member has a plurality of cuts at its lower edge, the plurality of cuts being evenly distributed around the bottom opening and dividing the lower edge of the elastic support member into a plurality of elastic pressure plates.

[0011] In some embodiments, an elastic layer is fixedly disposed on the inner side of the plurality of elastic pressure plates, the elastic layer being used to abut against the bottom surface of the inner wall of the urea tank.

[0012] In some embodiments, the second connecting part is an elastic tension member, the two ends of which are respectively connected to the urea sensor assembly and the bottom surface of the inner wall of the urea tank, and it is in an elastic tension state during operation.

[0013] Secondly, the present invention also provides a urea tank, including a tank body and the aforementioned urea injection device, wherein the top of the tank body is fixed to the first connecting portion, and the bottom surface of the inner wall of the tank body is connected to the second connecting portion.

[0014] Thirdly, the present invention also provides a vehicle including the urea injection device described above, or including the urea tank described above.

[0015] Compared with the prior art, the urea injection device, urea tank and vehicle provided by the present invention, by respectively setting a first connecting part and a second connecting part on the urea sensor assembly, connecting the first connecting part to the top of the urea tank, and connecting the second connecting part with an elastic structure to the bottom surface of the inner wall of the urea tank, multi-point fixation is achieved, which improves the stability of the overall structure of the urea injection device, reduces the vibration of the urea injection device, helps to improve the user experience and ensure overall reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the urea tank in one embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a urea tank in one embodiment of the present invention; Figure 3 This is a first structural schematic diagram of a urea sensor assembly in one embodiment of the present invention; Figure 4 This is a schematic diagram of the second structure of the urea sensor assembly in one embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the urea tank in another embodiment of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 1. Urea tank; 11. Tank body; 111. Groove; 2. Urea injection device; 21. Urea pump; 22. Urea sensor assembly; 3. Flange assembly; 4. Elastic support; 41. Cutout; 42. Elastic pressure plate; 5. Elastic tension member. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] To address the aforementioned technical problems, this invention provides a urea injection device, a urea tank, and a vehicle, which enables multi-point fixation of the urea injection device, improves the overall structural stability of the urea injection device, reduces vibration of the urea injection device, helps improve the user experience, and ensures overall reliability.

[0020] Please see Figure 1 The present invention provides a urea tank that can be used in a selective catalytic reduction system in a diesel vehicle. It includes a tank body 11 and a urea injection device 2. The urea injection device 2 is disposed on the tank body 11 and can extend into the interior of the tank body 11 to realize the delivery and injection of urea.

[0021] The tank body 11 can be made of high-density polyethylene (HDPE) material and integrally molded using a rotational molding process. HDPE has excellent corrosion resistance (withstanding 32.5% urea solution), aging resistance, and shock resistance, while being lightweight, conforming to the trend of lightweight design. In some embodiments, the tank body 11 can also be made of polyamide glass fiber reinforced composite material, which helps to reduce the wall thickness of the tank body 11 and can simultaneously improve the anti-crystallization ability.

[0022] Meanwhile, the shape of the tank 11 can also be customized according to the vehicle layout. For example, its shape can be cylindrical or elliptical, and its volume range can also be flexibly set as needed, such as its volume can be 10 to 100L.

[0023] Based on this, please refer to Figure 2 The present invention also provides a urea injection device that can be used on the urea tank 1 described above.

[0024] The urea injection device 2 may include a urea pump 21 and a urea sensor assembly 22. The urea pump 21 may be fixed on the outside of the top of the urea tank 1. The urea sensor assembly 22 is connected to the urea pump 21 and may extend into the inside of the tank 11 through the opening at the top of the tank 11.

[0025] The urea sensor assembly 22 includes multiple sensors, a urea heating element, a urea outlet pipe, a urea filter, and wiring harness connectors. The multiple sensors can include a level sensor, a temperature sensor, and a urea quality sensor, which can be integrated into a single, compact structure. Specifically, the level sensor monitors the liquid level inside the tank 11, the temperature sensor monitors the urea temperature for control purposes, and the urea quality sensor detects the concentration of the urea solution to ensure the normal operation of the SCR system.

[0026] It should be noted that the specific arrangement of each sensor, urea heating tube, urea outlet tube, urea filter and wiring harness connector on the urea sensor assembly 22 can refer to the arrangement of related components in the prior art, and it is not the focus of this invention, so it will not be described in detail here.

[0027] In this embodiment, in order to install the urea sensor assembly 22 on the urea tank 1, the upper and lower ends of the urea sensor assembly 22 are respectively provided with a first connecting part and a second connecting part. The first connecting part can be used to connect to the top of the tank 11, while the second connecting part can be connected to the bottom surface of the inner wall of the tank 11.

[0028] In one embodiment, please refer to Figure 3 The first connecting part mentioned above can be a flange assembly 3, which can be fixedly connected to the top opening of the tank 11 by means of a flange connection, so as to fix the upper end of the urea sensor assembly 22.

[0029] It is understandable that the flange assembly 3 can also be equipped with a urea heating pipe joint, a compressed air pipe joint, a urea liquid outlet pipe joint, a wiring harness hole, etc. The relevant parts can be set with reference to the existing technology, and will not be described in detail here.

[0030] Based on this, the second connecting part can be an elastic structure, which is located at the end of the urea sensor assembly 22 away from the first connecting part, and can be used to connect to the bottom surface of the inner wall of the tank 11.

[0031] In one embodiment, please refer to Figure 4 The second connecting part can be an elastic support 4, which is fixedly installed at the bottom of the urea sensor assembly 22 and can be used to abut against and squeeze the bottom surface of the inner wall of the tank 11.

[0032] Specifically, the elastic support 4 includes a first fixing part and a second fixing part. The first fixing part is located on the side of the elastic support 4 near the urea sensor assembly 22 and is fixedly connected to the bottom of the urea sensor assembly 22. The second fixing part is located on the side of the elastic support 4 away from the first fixing part and is used to abut against and compress the bottom surface of the inner wall of the tank 11. At the same time, the cross-sectional dimension of the second fixing part can be larger than the cross-sectional dimension of the first fixing part.

[0033] At this time, the elastic support 4 is a deformable elastic material that can be deformed after being compressed. For example, it can be elastic plastic, metal sheet or rubber, etc., and there is no specific limitation on this.

[0034] In one embodiment, when the elastic support 4 is made entirely of rubber, it can be configured as a frustum-shaped structure with a smaller top and a larger bottom. In this case, the smaller end of the elastic support 4 can be fixed to the urea sensor assembly 22, while the opposite end can abut against the bottom surface of the inner wall of the tank 11 and remain compressed, so that it can constantly squeeze the bottom surface of the inner wall of the tank 11.

[0035] In one embodiment, when the elastic support 4 is made of elastic plastic or metal sheet, the elastic support 4 can be configured as a trumpet-shaped structure. In this case, the upper end (i.e., the first fixing part) of the elastic support 4 is fixedly connected to the urea sensor assembly 22, while its lower end (i.e., the second fixing part) forms a bottom opening. The bottom opening gradually increases in the direction away from the urea sensor assembly 22, so it can also form a structure that is smaller at the top and larger at the bottom.

[0036] Based on this, the elastic support 4 can abut against the bottom surface of the inner wall of the tank 11 through the bottom opening on its lower side. Since its material is elastic, by reasonably designing the height of the urea sensor assembly 22, the elastic support 4 can always maintain an elastic deformation state. Under the action of elastic recovery, the elastic support 4 can continuously abut against and squeeze the bottom surface of the inner wall of the tank 11.

[0037] It is understandable that, based on the different materials of the elastic support 4, the elastic support 4 can adopt different structural forms, such as any one of a disc structure, a conical structure, and a square structure, provided that the elastic deformation requirements are met. There is no specific limitation on this.

[0038] In one embodiment, please refer to Figure 4 Based on the above-mentioned flared structure design of the elastic support member 4, multiple cuts 41 can also be provided at the lower edge of the elastic support member 4. The multiple cuts 41 can be evenly distributed around the bottom opening of the elastic support member 4, thereby dividing the lower edge of the elastic support member 4 into multiple circumferentially distributed elastic pressure plates 42.

[0039] In this way, the elastic support 4 can abut against and squeeze the bottom surface of the inner wall of the tank 11 through each elastic pressure plate 42, which helps to improve the elastic deformation capacity of the elastic support 4 and increase the contact area between the elastic support 4 and the bottom surface of the inner wall of the tank 11, thus helping to improve the support effect of the elastic support 4 on the urea sensor assembly 22.

[0040] In one embodiment, an elastic layer (obscured in the figure, not shown) is also fixedly disposed on the bottom surface of one or more elastic pressure plates 42 on the elastic support 4. This elastic layer can be rubber with a coefficient of friction greater than that of the elastic support 4. When multiple elastic layers are provided, the multiple elastic layers are preferably evenly distributed circumferentially around the bottom opening on the elastic support 4.

[0041] In this way, the elastic support 4 can abut against and press against the bottom surface of the inner wall of the tank 11 through the various elastic layers at the bottom. The elastic layers can increase the friction between the elastic support 4 and the bottom surface of the inner wall of the tank 11, which can not only prevent the lower side of the elastic support 4 from sliding against the bottom surface of the inner wall of the tank 11, but also improve the shock absorption effect.

[0042] In one embodiment, such as Figure 2 As shown, based on the above-described structural configuration of the second connecting part, a groove 111 can be provided on the bottom surface of the inner wall of the tank 11 at the position directly opposite the elastic support member 4, so that the second fixing part (i.e., the lower end) on the elastic support member 4 can be embedded in the groove 111.

[0043] The groove 111 not only limits the second fixing part, but also limits the maximum deformation of the lower side of the elastic support 4, thereby ensuring that the elastic support 4 can effectively support the urea sensor assembly 22 for a long time.

[0044] It is understood that the second connection part mentioned above is an elastic support 4. The elastic support 4 can adopt different elastic structures, but it plays an elastic support role between the urea sensor assembly 22 and the bottom surface of the inner wall of the tank 11, and works with the top flange assembly 3 to fix the urea sensor assembly 22.

[0045] In other embodiments, please refer to Figure 5 The second connecting part can also be an elastic tension member 5, such as a spring in a stretched state. In this case, the upper end of the elastic tension member 5 can be fixed to the lower end of the urea sensor assembly 22, and the lower end of the elastic tension member 5 can be connected to the bottom surface of the inner wall of the tank 11, thereby realizing an elastic connection between the urea sensor assembly 22 and the bottom surface of the inner wall of the tank 11.

[0046] At this time, since the elastic tension member 5 is always in an elastic tension state during operation, and its tension range can be flexibly set as needed, it can also work with the top flange assembly 3 to fix the urea sensor assembly 22, and also has the effect of relieving vibration.

[0047] Based on the urea injection device 2 described above, the present invention also provides a vehicle, which includes a frame, on which a urea tank 1 is fixedly mounted by a bracket, and the urea tank 1 is provided with the urea injection device 2.

[0048] The urea injection device 2 includes a urea pump 21 and a urea sensor assembly 22. The urea pump 21 can be fixed on the outside of the top of the urea tank 1. The urea sensor assembly 22 is connected to the urea pump 21 and can extend into the inside of the tank 11 through the opening at the top of the tank 11.

[0049] The urea sensor assembly 22 includes multiple sensors, a urea heating element, a urea outlet pipe, a urea filter, and a wiring harness connector. The multiple sensors can include a level sensor, a temperature sensor, and a urea quality sensor, and can be integrated into a single, compact structure.

[0050] To enable the installation of the urea sensor assembly 22 on the urea tank 1, the upper and lower ends of the urea sensor assembly 22 are respectively provided with a first connecting part and a second connecting part. The first connecting part can be used to connect to the top of the tank 11, while the second connecting part can be connected to the bottom surface of the inner wall of the tank 11.

[0051] The first connecting part can be a flange assembly 3, which can be fixedly connected to the top opening of the tank 11 by means of a flange connection, so as to fix the upper end of the urea sensor assembly 22.

[0052] The aforementioned second connecting part can be an elastic structure, which is located at the end of the urea sensor assembly 22 away from the first connecting part, and can be used to connect to the bottom surface of the inner wall of the tank 11.

[0053] In one embodiment, the second connecting portion can be an elastic support 4, which is fixedly disposed at the bottom of the urea sensor assembly 22 and can be used to abut and press against the bottom surface of the inner wall of the tank 11. Specifically, the elastic support 4 includes a first fixing portion and a second fixing portion. The first fixing portion is located on the side of the elastic support 4 near the urea sensor assembly 22 and is fixedly connected to the bottom of the urea sensor assembly 22. The second fixing portion is located on the side of the elastic support 4 away from the first fixing portion and is used to abut and press against the bottom surface of the inner wall of the tank 11. Meanwhile, the cross-sectional dimension of the second fixing portion can be larger than the cross-sectional dimension of the first fixing portion.

[0054] When the elastic support 4 is made of elastic plastic or metal sheet, it can be configured as a trumpet-shaped structure. In this case, the upper end (i.e., the first fixing part) of the elastic support 4 is fixedly connected to the urea sensor assembly 22, while its lower end (i.e., the second fixing part) forms a bottom opening. The bottom opening gradually increases in the direction away from the urea sensor assembly 22, so it can form a structure that is smaller at the top and larger at the bottom.

[0055] Multiple cuts 41 can also be provided at the lower edge of the elastic support 4. The multiple cuts 41 can be evenly distributed around the bottom opening of the elastic support 4, thereby dividing the lower edge of the elastic support 4 into multiple circumferentially distributed elastic pressure plates 42.

[0056] An elastic layer (obscured in the figure, not shown) is also fixedly provided on the bottom surface of one or more elastic pressure plates 42 on the elastic support member 4. This elastic layer can be rubber with a coefficient of friction greater than that of the elastic support member 4. When multiple elastic layers are provided, the multiple elastic layers are preferably evenly distributed circumferentially around the bottom opening on the elastic support member 4.

[0057] In other embodiments, the second connecting part can also be an elastic tension member 5, such as a spring in a stretched state. In this case, the upper end of the elastic tension member 5 can be fixed to the lower end of the urea sensor assembly 22, while the lower end of the elastic tension member 5 can be connected to the bottom surface of the inner wall of the tank 11, thereby realizing an elastic connection between the urea sensor assembly 22 and the bottom surface of the inner wall of the tank 11.

[0058] It is understandable that, since the urea injection device 2 and the tank body 11 of the urea tank 1 can be fixed at multiple points, the urea injection device 2 has a more stable structure on the urea tank 1, which can reduce the vibration of the urea injection device 2, thereby helping to improve the overall reliability of the vehicle and further improve the user experience.

[0059] Based on this, the vehicle can also achieve the same effect by directly integrating the aforementioned urea tank 1 onto the chassis, which will not be elaborated further here.

[0060] To better understand this invention, the following is combined with... Figure 1-4 A detailed description of the technical solution of an embodiment of the present invention is provided below: By setting a flange assembly 3 on the top of the urea sensor assembly 22 and integrating an elastic support 4 near the bottom suction port of the urea injection device 2, the upper part of the urea injection device 2 can be fixed to the tank 11 through the flange, while its bottom can contact and press against the bottom plane of the inner wall of the tank 11 through the elastic support 4, thereby fixing the bottom of the urea injection device 2.

[0061] Thus, by adding fixing points to the urea injection device 2, the overall structural stability of the urea injection device 2 can be improved, the vibration of the urea injection device 2 can be reduced, thereby improving the user experience and indirectly improving the reliability of the SCR system on the vehicle.

[0062] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0064] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A urea injection device, characterized in that, include: Urea sensor assembly; The first connecting part is disposed at one end of the urea sensor assembly and is used to connect to the top of the urea tank; as well as The second connecting part is located at the end of the urea sensor assembly away from the first connecting part, and it is an elastic structure used to connect to the bottom surface of the inner wall of the urea tank.

2. The urea injection device according to claim 1, characterized in that, The second connecting part is an elastic support member, which is fixedly installed at the bottom of the urea sensor assembly and is used to abut against and squeeze the bottom surface of the inner wall of the urea tank.

3. The urea injection device according to claim 2, characterized in that, The elastic support member includes: A first fixing part, located on the side of the elastic support member near the urea sensor assembly, is used for fixed connection with the urea sensor assembly; and The second fixing part is located on the side of the elastic support away from the first fixing part, and is used to abut against and squeeze the bottom surface of the inner wall of the urea tank; The cross-sectional dimension of the second fixing part is larger than that of the first fixing part.

4. The urea injection device according to claim 2, characterized in that, The structure of the elastic support can be any one of a disc structure, a conical structure, or a square structure.

5. The urea injection device according to claim 3, characterized in that, The elastic support is a hollow structure and has a bottom opening at the second fixing part, the bottom opening gradually increasing in the direction away from the urea sensor assembly.

6. The urea injection device according to claim 5, characterized in that, The elastic support member has multiple cuts at its lower edge, which are evenly distributed around the bottom opening and divide the lower edge of the elastic support member into multiple elastic pressure plates.

7. The urea injection device according to claim 6, characterized in that, An elastic layer is fixedly provided on the inner side of the plurality of elastic pressure plates, and the elastic layer is used to abut against the bottom surface of the inner wall of the urea tank.

8. The urea injection device according to claim 1, characterized in that, The second connecting part is an elastic tension member. The two ends of the elastic tension member are respectively connected to the bottom surface of the urea sensor assembly and the inner wall of the urea tank, and it is in an elastic tension state during operation.

9. A urea tank, characterized in that, The device includes a tank and a urea injection device as described in any one of claims 1-8, wherein the top of the tank is fixed to the first connecting portion, and the bottom surface of the inner wall of the tank is connected to the second connecting portion.

10. A vehicle, characterized in that, It includes the urea injection device as described in any one of claims 1-8, or the urea tank as described in claim 9.

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