Extension filling structure and urea box with same

Abstract

The utility model provides an extended filling structure and a urea box with the same, and the extended filling structure comprises a filling port shell, a filling port main body, an extended cylinder and a sealing element, a mounting cavity is formed in the filling port shell, the filling port main body is arranged in the mounting cavity, a first gap communicated with the outside is formed between the side wall of the filling port main body and the inner side wall of the mounting cavity, and a filling cavity is formed in the filling port main body; one end of the extension cylinder extends into the mounting cavity and is connected with the filling port main body; the sealing element is arranged in the mounting cavity and is sealed between the extension cylinder and the filling port shell; an extension cavity and an exhaust channel are arranged in the extension cylinder, the extension cavity is communicated with the filling cavity, the exhaust channel forms an air outlet at one end of the extension cylinder located in the mounting cavity, the air outlet is communicated with the first gap, and the exhaust channel forms an air inlet at one end of the extension cylinder away from the mounting cavity. According to the utility model, the extension cylinder can be placed in the urea box, and meanwhile, the filling gun can realize an advanced gun jumping function.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive urea tanks, in particular to an extended filling structure and a urea tank with such a structure. Background Art

[0002] The urea tank stores urea solution to reduce the pollution of nitrogen oxides in vehicle exhaust by using the urea solution. A filling port assembly is usually provided on the urea tank, which is used for inserting a urea filling gun and filling urea solution into the urea tank. In the existing filling port assembly, an extension tube is also connected to the back surface (the side located inside the urea tank) of the filling port housing to achieve the function of the filling gun jumping out in advance when the urea is about to be filled up (i.e., when the set volume of the urea tank is reached). However, due to the special structures of the back surface and the rubber coating position of some filling port housings, it is impossible to place the extension tube after the filling port housing is connected to the urea tank. If the extension tube is directly moved to the magnetic filling port main body of the filling port assembly, although the problem of installation interference between the extension tube and the urea tank caused by the connection between the filling port housing and the urea tank can be avoided, since there is a magnetic filling port main body inside the filling port housing and a specially designed assembly gap between the magnetic filling port main body and the filling port housing, which is used to discharge air when filling urea solution (otherwise filling cannot be carried out), after the extension tube is directly moved to the magnetic filling port main body of the filling port assembly, when the liquid submerges the mouth of the extension tube, the gas in the urea tank can still be discharged from this gap, and the filling gun cannot jump out in advance, resulting in the failure of the extension tube to achieve the function of jumping out in advance.

[0003] Therefore, it is necessary to provide an extended filling structure to ensure that the extension tube can be placed on the urea tank, and at the same time, enable the filling gun to achieve the function of jumping out in advance, and to provide a urea tank with such an extended filling structure. Summary of the Utility Model

[0004] The first object of the utility model is to provide an extended filling structure to ensure that the extension tube can be placed on the urea tank, and at the same time, enable the filling gun to achieve the function of jumping out in advance, and to provide a urea tank with such an extended filling structure.

[0005] The second object of the utility model is to provide a urea tank with an extended filling structure to ensure that the extension tube can be placed on the urea tank, and at the same time, enable the filling gun to achieve the function of jumping out in advance.

[0006] To achieve the above first object, the present utility model provides an extended filling structure, including a filling port housing, a filling port main body, an extension tube, and a seal; the filling port housing is used to be installed on the urea tank, an installation cavity is provided in the filling port housing, the filling port main body is arranged in the installation cavity, a first gap communicating with the outside is formed between the side wall of the filling port main body and the inner side wall of the installation cavity, and a through filling cavity is provided in the filling port main body; one end of the extension tube extends into the installation cavity and is connected to the filling port main body, and the seal is arranged in the installation cavity and seals between the extension tube and the filling port housing; an extension cavity and an exhaust passage are arranged at intervals in the extension tube, the extension cavity communicates with the filling cavity and forms a filling passage for the filling gun to insert, the exhaust passage forms an air outlet at one end of the extension tube located in the installation cavity, the air outlet communicates with the first gap, and the exhaust passage forms an air inlet at the end of the extension tube away from the installation cavity.

[0007] Compared with the prior art, the extended filling structure of the present utility model realizes the purpose of transferring the installation position of the extension tube to the filling port main body by connecting the extension tube with the filling port main body, avoiding the problem of installation interference between the extension tube and the urea tank after the filling port housing is connected to the urea tank, ensuring that the urea tank can place the extension tube. At the same time, by setting a seal at the position between the extension tube and the filling port housing, the gap between the extension tube and the filling port housing is sealed, avoiding the direct discharge of the air in the urea tank from the gap between the extension tube and the filling port housing. And by setting an exhaust passage in the extension tube, when the filling gun normally fills the urea tank, the air can enter the exhaust passage from the air inlet of the exhaust passage and then be discharged through the first gap. When the filled urea solution submerges the air inlet of the exhaust passage, a sealed space is formed in the urea tank. Continuing to fill, the air in the urea tank cannot be discharged, while there is a gap between the filling gun and the extension tube, and the air in the extension tube can be discharged. The liquid level in the extension tube continues to rise, and the liquid level in the box space outside the extension tube cannot rise due to the air pressure. When the urea liquid in the extension tube submerges the induction probe on the filling gun, the filling gun jumps and stops filling. Therefore, the extended filling structure of the present utility model can ensure that the urea tank can place the extension tube, and at the same time, can enable the filling gun to realize the function of early gun jumping.

[0008] Preferably, the extension tube is connected to the filling port main body by spin welding.

[0009] Preferably, the extension tube includes a connection part and a tube body part. One end of the connection part is inserted into the installation cavity and connected to the filling port body. The other end of the connection part narrows and extends to form the tube body part. The tube body part passes through the outside of the filling port housing. The extension cavity and the exhaust passage are respectively formed through the connection part and the tube body part. The air outlet is formed on the connection part, and the air inlet is formed on the tube body part.

[0010] Preferably, the sealing member is sleeved on the extension tube and sealed between the connection part and the filling port housing.

[0011] Preferably, there is a second gap between the side wall of the connection part and the inner side wall of the installation cavity, and the second gap communicates between the air outlet and the first gap.

[0012] Preferably, the air outlet is located on the side wall of the connection part, and the air inlet is located at the end of the tube body part away from the connection part.

[0013] Preferably, the filling port body is a magnetic filling port body, a magnetic element is provided in the magnetic filling port body, and the connection part is used to encapsulate the magnetic element.

[0014] Preferably, the inner side wall of the extension cavity is recessed outward to form a groove, and the groove is used for urea solution to enter and submerge the induction probe of the filling gun.

[0015] Preferably, a communication groove communicating between the extension cavity and the exhaust passage is provided in the extension tube, and one end of the communication groove penetrates through the end of the extension tube away from the installation cavity.

[0016] To achieve the above second object, the present invention provides a urea tank, including a urea tank body and the above-mentioned extended filling structure. A containing cavity for containing urea solution is provided in the urea tank body. An installation port communicating with the containing cavity is further provided on the urea tank. The filling port housing is installed in the installation port. The extension tube extends into the containing cavity, and the air inlet communicates with the containing cavity.

[0017] Compared with the prior art, the urea tank of the present utility model has an extended filling structure. This extended filling structure connects the extension tube to the filling port main body, achieving the purpose of transferring the installation position of the extension tube to the filling port main body, avoiding the problem of installation interference between the extension tube and the urea tank after the filling port housing is connected to the urea tank, ensuring that the urea tank can accommodate the extension tube. At the same time, by setting a seal at the position between the extension tube and the filling port housing, the gap between the extension tube and the filling port housing is sealed, preventing the air in the accommodation cavity of the urea tank from directly discharging from the gap between the extension tube and the filling port housing. And by setting an exhaust passage in the extension tube, when the filling gun normally fills the urea solution into the accommodation cavity of the urea tank, the air in the accommodation cavity can enter the exhaust passage from the air inlet of the exhaust passage and then be discharged through the first gap. When the filled urea solution submerges the air inlet of the exhaust passage, a sealed space is formed in the accommodation cavity of the urea tank. Continuing to fill, the air in the accommodation cavity cannot be discharged, while there is a gap between the filling gun and the extension tube, and the air in the extension tube can be discharged. The liquid level in the extension tube continues to rise, and the liquid level in the accommodation cavity outside the extension tube cannot rise due to air pressure. When the urea liquid in the extension tube submerges the induction probe on the filling gun, the filling gun jumps and stops filling. Therefore, the urea tank of the present utility model can ensure that the accommodation cavity of the urea tank body can accommodate the extension tube, and at the same time, can enable the filling gun to achieve the function of early gun jumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the urea tank of the present utility model.

[0019] Figure 2 is Figure 1 an enlarged view of part A in

[0020] Figure 3 is a partial structure diagram of the extended filling structure of the present utility model.

[0021] Figure 4 is a three-dimensional structure diagram of the extension tube of the extended filling structure of the present utility model.

[0022] Figure 5 is a half-sectional view of the extension tube of the extended filling structure of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to elaborate in detail the technical content and structural features of the present utility model, the following further description is made in conjunction with the embodiments and with reference to the drawings.

[0024] Please refer to Figures 1 to 4, the urea tank 200 of the present utility model includes a urea tank body 201 and an extended filling structure 100. Among them, the extended filling structure 100 includes a filling port housing 1, a filling port body 2, an extension tube 3, and a seal 4; the filling port housing 1 is used to be installed on the urea tank 200, an installation cavity 11 is provided in the filling port housing 1, the filling port body 2 is arranged in the installation cavity 11, and there is a first gap 5 communicating with the outside between the side wall of the filling port body 2 and the inner side wall of the installation cavity 11. A through filling cavity 21 is provided in the filling port body 2; one end of the extension tube 3 extends into the installation cavity 11 and is connected to the filling port body 2, and the seal 4 is arranged in the installation cavity 11 and seals between the extension tube 3 and the filling port housing 1; an extended cavity 31 and an exhaust passage 32 are arranged at intervals in the extension tube 3. The extended cavity 31 communicates with the filling cavity 21 to form a filling passage for the filling gun 300 to insert. The exhaust passage 32 forms an air outlet 321 at one end of the extension tube 3 located in the installation cavity, and the air outlet 321 communicates with the first gap 5. The exhaust passage 32 forms an air inlet 322 at the end of the extension tube 3 away from the installation cavity. A containing cavity 201a for containing urea solution is provided in the urea tank body 201, and an installation port 201b communicating with the containing cavity 201a is further provided on the urea tank 200. The filling port housing 1 is installed in the installation port 201b, the extension tube 3 extends into the containing cavity 201a, and the air inlet 322 communicates with the containing cavity 201a.

[0025] By providing a seal 4 at the position between the extension tube 3 and the filling port housing 1, the gap between the extension tube 3 and the filling port housing 1 is sealed. And by providing an exhaust passage 32 in the extension tube 3, when the filling gun 300 normally fills the urea solution into the containing cavity 201a of the urea tank 200, the air in the containing cavity 201a can enter the exhaust passage 32 from the air inlet 322 of the exhaust passage 32, and then be discharged through the first gap 5. When the filled urea solution submerges the air inlet 322 of the exhaust passage 32, a sealed space is formed in the containing cavity 201a of the urea tank 200. Continuing to fill, the air in the containing cavity 201a cannot be discharged, and there is a gap between the filling gun 300 and the extension tube 3, and the air in the extension tube 3 can be discharged. The liquid level in the extension tube 3 continues to rise, and the liquid level in the containing cavity 201a outside the extension tube 3 cannot rise due to air pressure. When the urea liquid in the extension tube 3 submerges the induction probe on the filling gun 300, the filling gun 300 jumps and stops filling.

[0026] Please refer to Figure 3 , in an embodiment, the extension tube 3 is connected to the filling port body 2 by spin welding. However, this is not limited thereto. For example, the extension tube 3 and the filling port body 2 can also be connected together by means of clamping or bolt connection.

[0027] Please refer to Figure 2 and Figure 3, in one embodiment, the extension tube 3 includes a connecting portion 33 and a barrel portion 34. One end of the connecting portion 33 is inserted into the installation cavity 11 and connected to the filling port body 2. The other end of the connecting portion 33 narrows and extends to form the barrel portion 34. The barrel portion 34 passes through the outside of the filling port housing 1. The extension cavity 31 and the exhaust passage 32 are respectively formed through the connecting portion 33 and the barrel portion 34. The air outlet 321 is formed on the connecting portion 33, and the air inlet 322 is formed on the barrel portion 34. However, the structure of the extension tube 3 is not limited thereto. Specifically, the seal 4 is sleeved on the extension tube 3 and sealed between the connecting portion 33 and the filling port housing 1. After the filling port body 2 is connected to the extension tube 3 and the filling port body 2 is installed in the installation cavity 11 of the filling port housing 1, the extension tube 3 presses the seal 4, causing the seal 4 to be compressed to achieve a sealing effect.

[0028] Please refer to Figure 1 and Figure 2 , in one embodiment, there is a second gap 6 between the side wall of the connecting portion 33 and the inner side wall of the installation cavity 11. The second gap 6 communicates between the air outlet 321 and the first gap 5. When the filling gun 300 normally fills the urea solution into the accommodation cavity 201a of the urea tank 200, the air in the accommodation cavity 201a can enter the exhaust passage 32 from the air inlet 322 of the exhaust passage 32, then be discharged from the air outlet 321 of the exhaust passage 32, and then be discharged to the outside through the second gap 6 and the first gap 5 in sequence. However, it is not limited thereto. For example, the air outlet 321 of the exhaust passage 32 can also be directly communicated with the first gap 5, and the air discharged from the air outlet 321 of the exhaust passage 32 can be directly discharged through the first gap 5.

[0029] Please refer to Figure 4 , in one embodiment, the air outlet 321 is located on the side wall of the connecting portion 33, and the air inlet 322 is located at the end of the barrel portion 34 away from the connecting portion 33. However, it is not limited thereto. For example, the air outlet 321 can be arranged at the end of the connecting portion 33, and the air inlet 322 can be arranged on the side wall of the barrel portion 34.

[0030] Please refer to Figure 2 and Figure 5 , in one embodiment, the exhaust passage 32 has an "L" - shaped structure. However, it is not limited thereto.

[0031] Please refer to Figure 2 and Figure 3, in one embodiment, the filling port body 2 is a magnetic filling port body. A magnetic element 22 is provided inside the magnetic filling port body, and the connecting portion 33 of the extension tube 3 is used to encapsulate the magnetic element 22. Specifically, an installation groove 23 is provided inside the magnetic filling port body, the magnetic element 22 is arranged in the installation groove 23, and the connecting portion 33 of the extension tube 3 seals the installation groove 23 when connected to the magnetic filling port body, thereby encapsulating the magnetic element 22. Among them, the magnetic element 22 can be an annular magnet, but is not limited thereto.

[0032] Please refer to Figure 4 , the inner side wall of the extension cavity 31 is recessed outward to form a groove 35, and the groove 35 is used for the urea solution to enter and submerge the induction probe of the filling gun 300. By providing the groove 35 on the inner side wall of the extension cavity 31, when the filling gun 300 is inserted into the extension cavity 31 and urea solution is filled, it is convenient for the urea solution to submerge the induction probe of the filling gun 300, preventing the filling gun 300 from not jumping the gun due to the inner side wall of the extension cavity 31 of the extension tube 3 covering the induction probe.

[0033] Please refer to Figure 4 and Figure 5 , a communication groove 36 is provided inside the extension tube 3 and communicates between the extension cavity 31 and the exhaust passage 32, and one end of the communication groove 36 penetrates through the end of the extension tube 3 away from the installation cavity. Since the exhaust passage 32 is flat and long, the cantilever structure of the flat arc needle (for forming the exhaust passage 32) of the injection mold is prone to deformation, affecting the stability of the mold. By providing the communication groove 36, when the injection mold injects to form the extension tube 3, the thick insert bar (for forming the extension cavity 31) below the injection mold and the flat arc needle (for forming the exhaust passage 32) above can be connected into one body, thereby increasing the strength of the injection mold. And a little urea solution entering the exhaust passage 32 does not affect the filling gun 300 from jumping the gun. At the same time, if there is no communication groove 36, the rubber position outside the exhaust passage 32 needs to disassemble and open another set of molds. After the two molds are injection molded, the two injection parts are welded together by ultrasonic waves, which will increase a set of molds, as well as the ultrasonic fixture and the ultrasonic welding process cost. Therefore, by providing the communication groove 36 communicating between the extension cavity 31 and the exhaust passage 32, the present utility model can also save production costs and improve production efficiency.

[0034] Combined with Figures 1 to 5 , the specific working principle of the extended filling structure 100 of the present utility model is as follows:

[0035] Insert the filling gun 300 into the filling cavity 21 of the filling port main body 2 and the extension cavity 31 of the extension tube 3, so that the filling gun 300 fills the urea solution into the accommodating cavity 201a of the urea tank body 201 through the extension cavity 31. When the filling gun 300 normally fills the urea solution into the accommodating cavity 201a of the urea tank 200, the air in the accommodating cavity 201a can enter the exhaust passage 32 from the air inlet 322 of the exhaust passage 32, then be discharged from the air outlet 321 of the exhaust passage 32, and then be discharged to the outside through the second gap 6 and the first gap 5 in sequence. When the filled urea solution submerges the air inlet 322 of the exhaust passage 32, a sealed space is formed in the accommodating cavity 201a of the urea tank 200. Continuing to fill, the air in the accommodating cavity 201a cannot be discharged, and there is a gap between the filling gun 300 and the extension tube 3, so the air in the extension tube 3 can be discharged, and the liquid level in the extension tube 3 continues to rise. The liquid level in the accommodating cavity 201a outside the extension tube 3 cannot rise due to the air pressure. When the urea liquid in the extension tube 3 submerges the induction probe on the filling gun 300, the filling gun 300 jumps and stops filling.

[0036] In summary, the urea tank 200 of the present utility model has an extended filling structure 100. By connecting the extension tube 3 to the filling port main body 2, the extended filling structure 100 realizes the purpose of transferring the installation position of the extension tube 3 to the filling port main body 2, avoiding the problem of installation interference between the extension tube 3 and the urea tank body 201 after the filling port housing 1 is connected to the urea tank body 201 of the urea tank 200, ensuring that the accommodating cavity 201a of the urea tank body 201 can place the extension tube 3. At the same time, the filling gun 300 can realize the function of early gun jumping. Secondly, by arranging a groove 35 on the inner side wall of the extension cavity 31 in the present utility model, when the filling gun 300 is inserted into the extension cavity 31 and fills the urea solution, it is convenient for the urea solution to submerge the induction probe of the filling gun 300, preventing the filling gun 300 from not jumping due to the inner side wall of the extension cavity 31 of the extension tube 3 covering the induction probe. Furthermore, by arranging a communication groove 36 communicating between the extension cavity 31 and the exhaust passage 32 in the present utility model, when the injection mold injects to form the extension tube 3, the thick insert rod (for forming the extension cavity 31) below the injection mold and the flat arc needle (for forming the exhaust passage 32) above can be connected into one body, thereby increasing the strength of the injection mold, saving production costs, and improving production efficiency. Also, the existing magnetic filling port main body is provided with a rear cover for encapsulating the magnet inside it, while the extended filling structure 100 of the present utility model does not require additional extended components. The extension tube 3 of the present utility model directly replaces the rear cover on the original magnetic filling port main body, while realizing the encapsulation of the magnetic element 22 inside the magnetic filling port main body, and also realizing the extended filling of the urea solution. The extended filling structure 100 of the present utility model also has the characteristics of simple, reliable, stable structure, easy production and quality control.

[0037] The above-disclosed are only the preferred examples of the present utility model, and thus cannot be used to limit the scope of rights of the present utility model. Therefore, equivalent changes made according to the claims of the present utility model all fall within the scope covered by the present utility model.

Claims

1. An extended filling structure, characterized in that, It includes a filling port housing, a filling port body, an extension tube, and a seal; the filling port housing is used to be installed on the urea tank, an installation cavity is provided in the filling port housing, the filling port body is arranged in the installation cavity, a first gap communicating with the outside is provided between the side wall of the filling port body and the inner side wall of the installation cavity, and a through filling cavity is provided in the filling port body; one end of the extension tube extends into the installation cavity and is connected to the filling port body, the seal is arranged in the installation cavity and seals between the extension tube and the filling port housing; an extension cavity and an exhaust passage are arranged at intervals in the extension tube, the extension cavity communicates with the filling cavity and forms a filling passage for a filling gun to insert, the exhaust passage forms an air outlet at one end of the extension tube located in the installation cavity, the air outlet communicates with the first gap, and the exhaust passage forms an air inlet at the end of the extension tube away from the installation cavity.

2. The extended filling structure according to claim 1, characterized in that, The extension tube is connected to the filling port body by spin welding.

3. The extended filling structure according to claim 1, characterized in that The extension tube includes a connecting portion and a barrel portion, one end of the connecting portion is inserted into the installation cavity and connected to the filling port body, the other end of the connecting portion narrows and extends to form the barrel portion, the barrel portion passes through the outside of the filling port housing, the extension cavity and the exhaust passage are respectively formed through the connecting portion and the barrel portion, the air outlet is formed on the connecting portion, and the air inlet is formed on the barrel portion.

4. The extended filling structure according to claim 3, wherein, The seal is sleeved on the extension tube and seals between the connecting portion and the filling port housing.

5. The extended filling structure according to claim 3, wherein, A second gap is provided between the side wall of the connecting portion and the inner side wall of the installation cavity, and the second gap communicates between the air outlet and the first gap.

6. The extended filling structure according to claim 3, wherein The air outlet is located on the side wall of the connecting portion, and the air inlet is located at the end of the barrel portion away from the connecting portion.

7. The extended filling structure according to claim 3, characterized in that, The filling port body is a magnetic filling port body, a magnetic element is provided in the magnetic filling port body, and the connecting portion is used to encapsulate the magnetic element.

8. The extended filling structure according to claim 1, wherein, The inner side wall of the extension cavity is recessed outward to form a groove, and the groove is used for urea solution to enter and submerge the induction probe of the filling gun.

9. The extended filling structure according to claim 1, wherein, A communication groove communicating between the extension cavity and the exhaust passage is provided in the extension tube, and one end of the communication groove penetrates through the end of the extension tube away from the installation cavity.

10. A urea tank, characterized in that, It includes a urea tank body and an extended filling structure according to any one of claims 1-9, a containing cavity for containing urea solution is provided in the urea tank body, an installation port communicating with the containing cavity is further provided on the urea tank, the filling port housing is installed in the installation port, the extension tube extends into the containing cavity, and the air inlet communicates with the containing cavity.

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