A new urea pump guard
Patent Information
- Application Number
- CN202521759117.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-08-19
AI Technical Summary
然而，实际应用中发现，尿素泵存在因车辆碰撞等意外情况易受损的问题，一旦损坏需进行维修或更换，将显著增加用户的使用成本；
本申请提供的一种新型尿素泵防护装置能够快速拆装，塑料材质防护壳减轻重量，降低维护成本。尿素泵位于尿素箱壳体内，使尿素加注管和尿素加注通气管分别连接至泵体的对应接口，随后将尿素泵防护壳安装至尿素泵外侧，先通过两个第一卡扣与尿素箱壳体的卡槽对应卡合，完成初步定位，再将两个第二卡扣穿设过通孔，与壳体的卡合块匹配扣接，实现防护壳的固定，此时尿素箱壳体与尿素泵防护壳形成密封空间，对尿素泵形成全面防护，即车辆行驶工作中尿素泵工作，当需要对尿素泵进行检修或更换时，只需解除第二卡扣与卡合块的扣接，分离第一卡扣与卡槽，即可将防护壳从尿素箱壳体上拆卸下来，操作便捷，便于快速开展维护工作，并且尿素泵防护壳由EPDM塑料吹塑一体成型，EPDM塑料对尿素溶液具有优异的耐腐蚀性，能够避免防护壳因受到尿素溶液侵蚀而出现老化、破损等问题，延长了尿素泵防护壳的使用寿命，同时EPDM塑料材质本身重量较轻，使得尿素泵防护壳的重量降低，有助于减轻车辆的整体重量。
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Figure CN224729743U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of urea pump technology, and more specifically, to a novel urea pump protection device. Background Technology
[0002] With the formal implementation of my country's VI emission regulations, the control standards for pollutants emitted from motor vehicle exhaust have been upgraded to be more stringent, with particularly stringent requirements for emission limits on nitrogen oxides (NOx) and particulate matter. To meet these regulatory requirements, the industry generally uses a 32.5% automotive urea aqueous solution to reduce nitrogen oxides in exhaust gas, converting them into harmless nitrogen and water through selective catalytic reduction (SCR) technology, thereby achieving the goal of exhaust gas purification. In this process, all OEMs and suppliers rely on the urea system as the core supporting hardware, undertaking key functions such as urea storage, transportation, and injection, and are crucial to ensuring exhaust gas purification efficiency. Within the urea system, the urea pump is a core component, and its performance and stability directly affect the overall system's operation. However, in practical applications, it has been found that the urea pump is susceptible to damage from accidents such as vehicle collisions. Once damaged, it requires repair or replacement, significantly increasing the user's operating costs. Traditional urea pump protective covers are mostly made of a single piece of metal, which not only makes them heavy and increases the energy consumption burden of the vehicle, but also makes it difficult to disassemble because the protective cover of the urea pump is often fixed to the housing with bolts. This causes many inconveniences for daily maintenance, repair and parts replacement, and further affects the ease of use and maintenance efficiency of the urea system. Therefore, there is an urgent need for a new type of urea pump protection device that is easy to disassemble and assemble. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.
[0004] Therefore, this application provides a novel urea pump protection device that can be quickly disassembled and assembled, and the plastic protective shell reduces weight and maintenance costs.
[0005] The novel urea pump protection device provided in this application includes a urea tank housing, a urea pump, and a urea pump protective shell. The urea tank housing has two slots and two engaging blocks on its inner side. The urea pump is assembled inside the urea tank housing and is connected to a urea filling pipe and a urea filling vent pipe. The urea pump protective shell is detachably connected to the urea tank housing and is fitted over the outside of the urea pump. The urea pump protective shell includes: two first buckles symmetrically arranged on one edge of the urea pump protective shell and engaging with the corresponding slots; two through holes located on the side of the urea pump protective shell away from the first buckles; and two second buckles, respectively inserted into the corresponding through holes and mating with the corresponding engaging blocks.
[0006] In some embodiments, the urea pump protective housing is integrally molded from EPDM plastic by blow molding.
[0007] In some embodiments, the first buckle engages with the slot, and the second buckle passes through the through hole and engages with the engaging block.
[0008] In some embodiments, each of the first buckles is in the shape of a barb.
[0009] In some embodiments, the edge of the urea tank housing is an irregular groove, and the edge of the urea pump protective housing is an irregular protrusion, with the irregular groove and the irregular protrusion being adapted to each other.
[0010] In some embodiments, the system further includes: two storage slots disposed inside the urea pump protective housing; and two spare clips detachably disposed on the corresponding storage slots.
[0011] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects: This application provides a novel urea pump protective device that allows for quick assembly and disassembly. The plastic protective shell reduces weight and maintenance costs. The urea pump is located inside the urea tank housing. The urea filling pipe and urea filling vent pipe are connected to their respective interfaces on the pump body. The urea pump protective shell is then installed on the outside of the urea pump. Initial positioning is achieved by firstly engaging the two first clips with the corresponding slots on the urea tank housing. Then, two second clips are inserted through the through holes and matched with the engaging blocks on the housing to secure the protective shell. At this point, the urea tank housing and the urea pump protective shell form a sealed space, providing comprehensive protection for the urea pump. This means the urea pump operates while the vehicle is in motion. When maintenance or replacement of the urea pump is required, it can be easily disassembled. Except for the second clip and the locking block, separating the first clip and the slot allows the protective shell to be removed from the urea tank housing. The operation is convenient and facilitates quick maintenance. Furthermore, the urea pump protective shell is made of EPDM plastic through blow molding. EPDM plastic has excellent corrosion resistance to urea solution, which can prevent the protective shell from aging and breaking due to urea solution corrosion, thus extending the service life of the urea pump protective shell. At the same time, the EPDM plastic material itself is lightweight, which reduces the weight of the urea pump protective shell and helps to reduce the overall weight of the vehicle.
[0012] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0013] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of the urea tank according to some embodiments of this application; Figure 2 This is a schematic diagram of the internal structure of the urea tank according to some embodiments of this application; Figure 3 This is a schematic diagram of the structure of the urea pump protective housing according to some embodiments of this application; Figure 4 This is a schematic planar structure diagram of a urea pump protective housing according to some embodiments of this application.
[0014] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Urea tank shell; 11. Slot; 12. Clamping block; 2. Urea pump; 21. Urea filling pipe; 22. Urea filling vent pipe; 3. Urea pump protective shell; 31. First buckle; 32. Through hole; 33. Second buckle; 34. Storage slot; 35. Spare buckle. Detailed Implementation
[0015] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0016] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0017] The following reference Figures 1 to 4 This application describes a novel urea pump protection device provided according to some embodiments.
[0018] like Figures 1 to 4 As shown, a novel urea pump protection device according to some embodiments of this application includes a urea tank housing 1, a urea pump 2, and a urea pump protective shell 3. The urea tank housing 1 has two slots 11 and two engaging blocks 12 on its inner side; the urea pump 2 is assembled in the internal space of the urea tank housing 1 and is connected to a urea filling pipe 21 and a urea filling vent pipe 22; the urea pump protective shell 3 is detachably connected to the urea tank housing 1 and is sleeved on the outside of the urea pump 2. The urea pump protective shell 3 includes: two first buckles 31 symmetrically arranged on one side edge of the urea pump protective shell 3 and engaging with the slots 11; two through holes 32 located on the side of the urea pump protective shell 3 away from the first buckles 31; and two second buckles 33 respectively passing through the corresponding through holes 32 and engaging with the corresponding engaging blocks 12.
[0019] In this embodiment, the urea pump 2 is located inside the urea tank housing 1, with the urea filling pipe 21 and the urea filling vent pipe 22 connected to the corresponding interfaces of the pump body. Then, the urea pump protective shell 3 is installed on the outside of the urea pump 2. First, the two first buckles 31 are engaged with the corresponding slots 11 of the urea tank housing 1 to complete the initial positioning. Then, the two second buckles 33 are passed through the through holes 32 and matched with the engaging blocks 12 of the housing to fix the urea pump protective shell 3. At this time, the urea tank housing 1 and the urea pump protective shell 3 form a sealed space, providing comprehensive protection for the urea pump 2. That is, the urea pump 2 works while the vehicle is in motion. When the urea pump 2 needs to be repaired or replaced, it is only necessary to release the engagement between the second buckles 33 and the engaging blocks 12 and separate the first buckles 31 from the slots 11 to remove the urea pump protective shell 3 from the urea tank housing 1. The operation is convenient and facilitates quick maintenance.
[0020] In some possible embodiments, such as Figure 3 As shown, the urea pump protective housing 3 is integrally molded from EPDM plastic by blow molding.
[0021] In this embodiment, EPDM plastic itself has good elasticity and toughness. Through blow molding, the urea pump protective shell 3 has a robust overall structure, which can effectively absorb and buffer the vibration generated during vehicle operation and the impact force that may be received during collisions, providing reliable protection for the internal urea pump 2 and reducing the risk of damage to the urea pump 2 due to external impacts. Since the urea pump protective shell 3 is in contact with urea solution for a long time, and EPDM plastic has excellent corrosion resistance to urea solution, it can avoid aging and damage caused by urea solution corrosion, thus extending the service life of the urea pump protective shell 3. In addition, the EPDM plastic material itself is lightweight, which reduces the weight of the urea pump protective shell 3 and helps to reduce the overall weight of the vehicle.
[0022] In some possible embodiments, such as Figures 1 to 3 As shown, the first buckle 31 is engaged in the slot 11, and the second buckle 33 is engaged with the engaging block 12 through the through hole 32; each first buckle 31 is in the shape of a barb.
[0023] In this embodiment, the first buckle 31 is in the shape of a barb, with its component part bent inward to form an elastic locking structure. During assembly, the first buckle 31 is aligned with the slot 11 on the urea tank housing 1, and a certain external force is applied to cause the barb-shaped buckle to deform slightly. When the buckle is fully inserted into the slot 11, the barb part elastically resets itself, thereby hooking onto the inner wall of the slot 11, achieving a firm engagement between the first buckle 31 and the slot 11. Two first buckles 31 are symmetrically distributed on one side edge of the urea pump protective shell 3, matching the corresponding two slots 11 one by one; the second buckle 33 passes through the urea pump. Inside the through hole 32 on the side of the protective shell 3 away from the first buckle 31, its structure is adapted to the shape of the locking block 12. During assembly, the second buckle 33 is passed through the through hole 32 and makes it contact the locking block 12 on the urea tank shell 1. When pressure is applied, the second buckle 33 will bite into the locking block 12. The barb of the second buckle 33 hooks the edge of the locking block 12, thereby achieving a tight connection between the two. The two second buckles 33 correspond to the two locking blocks 12 respectively, and further fix the urea pump protective shell 3 from the other side opposite to the first buckle 31, forming a bidirectional clamping fixation effect with the first buckle 31.
[0024] In this design, the snap-fit connection does not require additional fasteners such as bolts and nuts. Disassembly can be completed simply by applying external force manually, which greatly simplifies the maintenance process of the urea pump 2 and reduces labor and time costs.
[0025] In some possible embodiments, such as Figure 2 , Figure 3 As shown, the edge of the urea tank shell 1 is irregularly grooved, and the edge of the urea pump protective shell 3 is irregularly protruding. The irregular groove and the irregular protrusion are matched.
[0026] In this embodiment, the irregular grooves and protrusions have unique compatibility and can play a clear guiding role during assembly. During assembly, the urea pump protective shell 3 moves closer to the urea tank shell 1, and the irregular protrusions on the edge of the urea pump protective shell 3 will naturally embed themselves along the irregular grooves on the edge of the shell, forming a sealing barrier. This effectively prevents external dust, moisture, oil and other impurities from entering the interior of the urea tank shell 1, avoiding impurities from adhering to the surface of the urea pump 2 or blocking the pipeline, and reducing the risk of failure of the urea pump 2 due to impurities.
[0027] In some possible embodiments, such as Figure 3 As shown, it also includes: two storage slots 34, which are respectively located inside the urea pump protective shell 3; and two spare buckles 35, which are detachably installed on the corresponding storage slots 34.
[0028] In this embodiment, the storage slot 34 is specifically designed for the spare buckle 35, providing it with a fixed storage space. When the second buckle 33 on the urea pump protective shell 3 fails due to wear and tear from long-term use or breakage from accidental collision, the spare buckle 35 can replace the damaged buckle in time, ensuring continuous protection of the urea pump 2.
[0029] When this new urea pump protection device is in operation, the urea pump 2 is assembled inside the urea tank housing 1, and the urea filling pipe 21 and the urea filling vent pipe 22 are respectively connected to the corresponding interfaces of the pump body to ensure smooth delivery of urea solution and maintain air pressure balance during filling. Then, the urea pump protective shell 3 is installed. First, the two first buckles 31 on one side of the urea pump protective shell 3 are engaged with the two slots 11 on the inner side of the urea tank housing 1. External force is applied to deform the barbs and then reset them to hook onto the inner wall of the slots 11, completing the initial positioning. Then, the two second buckles 33 on the other side of the urea pump protective shell 3 are passed through the through hole 32 and matched with the two engaging blocks 12 of the shell. The barbs are firmly fixed by the engagement of the engaging blocks 12. At this time, the irregular groove on the edge of the urea tank housing 1 and the edge of the urea pump protective shell 3 are aligned. The irregular protrusions fit tightly to form a sealed space, providing complete protection for the urea pump 2. During vehicle operation, the urea pump 2 works normally, delivering urea solution to the exhaust gas treatment system through the urea filling pipe 21. The urea filling vent pipe 22 balances the filling air pressure. During this process, the urea pump protective shell 3, integrally molded from EPDM plastic, absorbs vehicle vibration and external impact force due to its elasticity and toughness, preventing damage to the urea pump 2. At the same time, the spare buckle 35 in the storage slot 34 is ready along with the urea pump protective shell 3, without affecting normal operation. When it is necessary to repair or replace the urea pump 2, manually release the second buckle 33 from the locking block 12, press the barb of the first buckle 31 to deform it and separate it from the slot 11, and then the urea pump protective shell 3 can be removed.
[0030] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.
[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0032] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" 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. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0034] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A novel urea pump protection device, characterized in that, include: The urea tank shell has two slots and two locking blocks on the inside. A urea pump is installed inside the urea tank housing, and the urea pump is connected to a urea filling pipe and a urea filling vent pipe. A urea pump protective housing is detachably connected to the urea tank housing, and the urea pump protective housing is sleeved on the outside of the urea pump. The urea pump protective housing includes: Two first buckles are symmetrically arranged on one side edge of the urea pump protective shell and engage with the corresponding slots; Two through holes are provided on the side of the urea pump protective housing away from the first buckle; Two second buckles are respectively inserted into the corresponding through holes and are matched and fastened with the corresponding locking blocks.
2. The novel urea pump protection device according to claim 1, characterized in that: The urea pump protective housing is integrally molded from EPDM plastic.
3. The novel urea pump protection device according to claim 1, characterized in that: The first buckle engages within the slot, and the second buckle passes through the through hole and engages with the engaging block.
4. The novel urea pump protection device according to claim 1, characterized in that: Each of the first buckles is in the shape of a barb.
5. The novel urea pump protection device according to claim 1, characterized in that: The edge of the urea tank shell is irregularly grooved, and the edge of the urea pump protective shell is irregularly protruding. The irregular groove and the irregular protrusion are adapted to each other.
6. The novel urea pump protection device according to claim 1, characterized in that, Also includes: Two storage slots are located inside the protective shell of the urea pump. Two spare clips are detachably mounted on the corresponding storage slots.