Built-in urea box structure

Abstract

The utility model belongs to the field of heavy-duty car post-processing systems, and particularly relates to a built-in urea box structure which comprises a urea box body located on the inner side of a frame longitudinal beam. One end of the filling pipeline is communicated with the urea box body, and the other end of the filling pipeline is communicated with a filling port; wherein the filling port is positioned on the outer side of the frame. The volume of the box body is effectively increased, the arrangement is compact, the space is fully utilized, the device can adapt to the large slope of the whole vehicle, after-sale maintenance is convenient, the product competitiveness can be effectively improved, and the problem that the driving range of the whole vehicle is low due to the small volume of urea is solved.

Description

Technical Field

[0001] The utility model belongs to the field of heavy-duty automobile post-processing systems, and in particular relates to a built-in urea tank structure. Background Art

[0002] According to the provisions of the "Light-duty Vehicle Pollutant Emission Limits and Measurement Methods (China Phase VI)", the implementation of more stringent emission regulations and the obvious trend of demand for large fuel tanks for tractors have led to tight space for the layout of tractor chassis accessories, resulting in increasingly limited space for the layout of urea tanks. The available space is getting smaller and smaller, but the demand for urea volume is increasing, forming a prominent contradiction.

[0003] In order to solve the above problems, the utility model provides a built-in urea tank structure. Utility Model Content

[0004] The utility model provides a built-in urea system, the purpose of which is to use the space inside the frame longitudinal beam to arrange a special-shaped urea box, fully utilize the space inside the chassis longitudinal beam, increase the urea volume, extend the vehicle's driving range, and enhance product competitiveness.

[0005] The utility model provides a built-in urea tank structure, comprising:

[0006] A urea tank, which is located on the inner side of the frame longitudinal beam;

[0007] A filling pipeline, one end of which is connected to the urea tank, and the other end of which is connected to the filling port;

[0008] Wherein, the filling port is located outside the frame.

[0009] Preferably, it further comprises a vent pipe, one end of which is connected to the urea tank and the other end is a free outlet end, and the vent pipe corresponds to the setting path of the filling pipeline.

[0010] Preferably, it also includes a clamp, a fixed bracket, a cover body and a first bracket, the clamp clamps the filling pipeline and the ventilation pipeline, the fixed bracket fixes the filling pipeline and the ventilation pipe, the first bracket is fixed near the filling port, and the cover body covers the filling port.

[0011] Preferably, the vehicle further comprises a second bracket and a third bracket, which are mounted on the vehicle frame, and the urea tank is fixed to the second bracket and the third bracket by a drawstring.

[0012] Preferably, the second bracket and the third bracket are in a "X" shape.

[0013] Preferably, the urea tank is L-shaped.

[0014] Preferably, the device further comprises a urea sensor and a vent hole, wherein the vent hole is arranged on the urea tank, and the head of the urea sensor is arranged on the urea tank in an inclined manner.

[0015] Preferably, the portion where the filling pipeline is connected to the filling port is in a warped shape.

[0016] Preferably, the filling pipeline and the vent pipe are connected to the urea tank through a quick plug.

[0017] Preferably, at least one reinforcement member is provided on one side of the urea tank.

[0018] Beneficial effects of the utility model:

[0019] 1. The built-in urea tank structure provided by the utility model meets the market demand for large-volume urea tanks.

[0020] 2. The built-in urea tank structure provided by the utility model maximizes the use of chassis space by placing urea inside and fuel tank outside, which has minimal impact on the chassis peripheral systems and upper installations, and solves the prominent contradiction and problem of increasing the fuel tank and reducing the urea tank.

[0021] 3. The built-in urea tank structure provided by the utility model adopts a split structure of the tank body and the filling pipe, which can cover multiple platforms and multiple vehicle models, and meet the mold universalization and modularization to the greatest extent.

[0022] 4. The built-in urea tank structure provided by the utility model can cover the maximum slope requirements under all working conditions and can meet the demand for effective urea supply under any working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the built-in urea tank of the utility model;

[0024] Figure 2 It is a schematic diagram of the back side of the built-in urea box structure of the utility model;

[0025] Among them, 1-the second bracket, 2-the pull belt, 3-the urea box, 4-the vent, 5-the urea sensor, 6-the third bracket, 7-the filling pipeline, 8-the clamp, 9-the vent pipe, 10-the fixed bracket, 11-the cover body, 12-the first bracket, 13-the reinforcement, and 14-the quick-connect connector. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0027] In the present specification, it should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0028] The utility model can be applied to long-distance standard-load tractor models. It adopts a new urea tank layout technical solution, which effectively increases the tank volume, has a compact layout, fully utilizes the space, can adapt to large slopes of the vehicle, and has convenient after-sales maintenance. It can effectively enhance product competitiveness and meet the market demand for large-volume urea tanks.

[0029] The built-in urea tank system described in the present invention is composed of an L-shaped urea tank 3, a second bracket 1 and a third bracket 6, a drawstring 2, a urea sensor 5, a filling pipeline 7, a fixed bracket 10, a clamp 8, a cover 11 and other components. The urea tank is "L"-shaped along the XY section. In order to make full use of the space, the front of the tank is arranged below the lower wing surface of the left longitudinal beam, and the inner side does not exceed the longitudinal beam boundary to ensure the safety space with the transmission and retarder and other systems. The rear side is arranged on the inner side of the belly and the left side of the transmission shaft to ensure that the tank does not occupy the disassembly and maintenance space of the rear axle air chamber and the transmission shaft and other systems. The filling port is led to the outside of the frame through the filling pipeline to facilitate urea filling. The overall urea tank volume and the maximum matching tank volume can achieve a filling frequency of 1:1 to meet the demand for long driving range.

[0030] The second bracket 1 and the third bracket 6 are "X"-shaped brackets, which are the front support brackets of the box body. They are installed on the frame through two holes. The urea box body 3 is placed on the top and sinks synchronously on the support surface of the bracket. The bracket and the box body are effectively fitted through the embedded structure. The drawstring 2 fixes the urea box body 3 on the second bracket and the third bracket to achieve the box body limit in the Y and Z directions. The Z-direction height of the box body is consistent with the other chassis accessories, and the lowest point will not exceed the surrounding system, which can ensure that the vehicle's passability is not affected by the inner arrangement of the urea box body, and the optimized arrangement of the urea box body has the least impact on the surrounding system and the maximum volume contribution;

[0031] The urea tank 3 is an overall special-shaped structure. The front end is improved by four circular holes of the reinforcement 13 to improve the strength of the tank at the front end, avoiding the problem of flattening caused by the narrow cavity structure. It has an outward convex structure near the outer side of the frame. The purpose is to improve the strength of the tank and to avoid the peripheral parts from making full use of the space. The purpose of the overall large arc transition at the front and rear connection is to keep the same cross section with the upper frame crossbeam to avoid the assembly risk of being unable to fall due to the powertrain assembly. The installation port of the urea sensor 5 is arranged at the rear of the tank because it is arranged at the rear without any obstruction above it, and the sensor is easy to repair and maintain. The side of the tank is designed with an inclined surface to facilitate the design of the filling port. The filling port is quickly connected to the filling pipe by welding a quick-connect plug. The filling port is located at two interfaces, the first interface is the urea interface, and the second interface is the ventilation interface. The main function of the ventilation interface is to sense the full urea filling level alarm. The special-shaped structure at the rear of the tank is mainly to avoid the risk of interference from peripheral parts.

[0032] The vent hole 4 is a pressure balancing device inside and outside the box, which can avoid box deformation caused by internal pressure changes due to urea consumption or overheating. It is located in the middle of the box and higher than the upper surface of the box. Its purpose is to balance the pressure inside and outside the box normally when the box is in a large tilt state during the uphill or downhill process of the vehicle, and realize the normal urea liquid absorption or liquid return function to meet the urea consumption requirements under special working conditions. This design can achieve a maximum slope angle of more than 15°; the urea quality sensor 5, whose head is tilted, is convenient for the design of urea water pipes and urea liquid pipelines, avoiding the problem of congestion caused by pipeline bends. The second bracket 1 and the third bracket 6 supporting the big end of the box body are "J"-shaped brackets, which are the main load-bearing parts. They jointly support and limit the urea box body through the combined pull-belt structure. The support structure design of the three supports can meet the requirements of high-frequency low-amplitude and low-frequency high-amplitude severe working conditions under full liquid level conditions; Part 7 is a urea filling pipeline. The design of the molded pipe can effectively ensure the installation accuracy and diversion requirements. One end of the filling pipe is connected to the filling port and the other end is connected to the urea box body. The tail of the end connected to the filling port is tilted and forms a certain angle with the horizontal plane, which meets the requirements of normal and rapid flow of urea solution in China during the filling process, and can avoid the problems of urea crystallization and poor flow caused by liquid deposition. The other end is connected to the quick plug joint. The structure is packaged to realize the quick connection between the filling pipe and the box body. It is a split design, which can cover more platform models and product status, and has better modularity; Part 8 is a butterfly clamp for the filling pipe, which fixes the filling pipe and the vent pipe throughout the whole process, reduces the shaking and interference wear of the pipe, and improves reliability; the vent pipe 9 at the filling port is used for ventilation when urea is normally filled, and triggers the full liquid level alarm through reflux when the filling reaches the full liquid level; the fixed bracket 10 is mounted on the surrounding parts to effectively fix the filling pipe and the vent pipe; the cover body 11 of the filling box cover and the first bracket 12 at the filling port effectively fix the filling gun during the urea filling process to ensure that the filling pipe is stable and without shaking. The quick-plug connector 14 of the filling pipe and the vent hole is convenient to operate during the maintenance and assembly process, and the reliability of the product is improved.

[0033] The utility model provides an L-shaped urea tank, an integrated "X"-shaped stamping fixing bracket, a flexible drawstring and a rubber pad, an insert nut, and a T-shaped bolt that are fixed together on the second bracket and the third bracket. The "X"-shaped bracket also includes a set of porous pad sleeves and a U-shaped reinforcement bracket.

[0034] The L-shaped urea tank occupies the entire lower inner side of the frame and covers the entire inner side of the longitudinal beam. The special-shaped design maximizes the use of the vehicle layout position, opens up new space for urea tank design, and completely avoids the impact on chassis accessories such as fuel tanks and upper trailer systems.

[0035] The vent hole is located in the middle of the front and rear of the tank and is higher than the surface of the tank, which can meet the urea supply demand of the vehicle under all operating slope conditions, adapt to the emission regulations of the National VI models under all operating conditions, and realize that a large-volume slender urea tank only needs to reserve one set of vent holes to meet the design requirements of internal and external pressure balance, which has the advantages of covering a wide range of working conditions and low cost.

[0036] The utility model mainly proposes a new structure of built-in urea tank, which is arranged under the longitudinal beam of the frame, and has an "L"-shaped structure as a whole. It does not occupy the space on both sides of the chassis, and its height from the ground is consistent with the height of the chassis parts arranged on the left and right. The filling port is arranged between the rear fender of the left longitudinal beam and the fuel tank, and the Y-direction and Z-direction heights are kept consistent with the position of the fuel tank filling port for easy filling; the vent is arranged in the middle of the tank and protrudes higher from the tank, which can meet the requirements of effective liquid absorption under the condition of the vehicle inclination angle of 16°. The tank is supported by 3 integrated stamping brackets, and the overall strength is large, which can effectively meet the force requirements. The overall built-in solution is highly innovative, the urea tank volume is large, and the layout is scientific, compact and reasonable. Through innovative layout ideas, it resolves the outstanding contradiction between insufficient urea tank layout space and large-volume urea tank, and effectively solves the problem of low vehicle mileage due to small urea volume.

[0037] The present invention has other optional embodiments, which will not be described in detail here.

[0038] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A built-in urea tank structure, characterized in that: include: A urea tank, which is located on the inner side of the frame longitudinal beam; A filling pipeline, one end of which is connected to the urea tank, and the other end of which is connected to the filling port; Wherein, the filling port is located outside the frame.

2. The built-in urea tank structure according to claim 1, characterized in that: It also includes a vent pipe, one end of which is connected to the urea tank and the other end is a free outlet end. The vent pipe corresponds to the setting path of the filling pipeline.

3. The built-in urea tank structure according to claim 2, characterized in that: It also includes a clamp, a fixed bracket, a cover body and a first bracket, the clamp clamps the filling pipeline and the ventilation pipeline, the fixed bracket fixes the filling pipeline and the ventilation pipe, the first bracket is fixed near the filling port, and the cover body covers the filling port.

4. The built-in urea tank structure according to claim 1, characterized in that: It also includes a second bracket and a third bracket, which are installed on the vehicle frame, and the urea tank is fixed to the second bracket and the third bracket through a drawstring.

5. The built-in urea tank structure according to claim 4, characterized in that: The second bracket and the third bracket are in a "X" shape.

6. The built-in urea tank structure according to claim 1, characterized in that: The urea tank is L-shaped.

7. The built-in urea tank structure according to claim 1, characterized in that: It also includes a urea sensor and a vent hole, wherein the vent hole is arranged on the urea box, and the head of the urea sensor is arranged on the urea box in an inclined manner.

8. The built-in urea tank structure according to any one of claims 1 to 7, characterized in that: The part where the filling pipe is connected to the filling port is tilted.

9. The built-in urea tank structure according to claim 2, characterized in that: The filling pipeline and the vent pipe are connected to the urea tank through a quick plug.

10. The built-in urea tank structure according to claim 1, characterized in that: At least one reinforcement piece is arranged on one side of the urea tank.

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