CN213598046U

CN213598046U - Automobile-used urea filling head

Info

Publication number: CN213598046U
Application number: CN202022767327.5U
Authority: CN
Inventors: 夏雷鸣; 李立涛; 柳名智; 卢贵宾; 王强
Original assignee: Hebei Chinaust Automotive Plastics Co Ltd
Current assignee: Hebei Chinaust Automotive Plastics Co Ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-07-02
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a vehicle urea filling head, include: the urea filling device comprises a filling head main body, a urea tank and a urea tank, wherein the filling head main body is used for forming a filling channel, and filled urea flows into the urea tank through the filling channel; the end cover is buckled on the filling head main body in a buckling mode and comprises a cover body and a filling port; the upper end part of the filling head main body is provided with a first buckling position arranged in the circumferential direction, the end cover is provided with a second buckling position matched with the first buckling position, and the second buckling position is convexly arranged along the outer periphery of the lower end part of the cover body; a first sealing ring is arranged between the filling head main body and the end cover, and when the end cover is buckled on the filling head main body, the first sealing ring is compressed. The urea filling head of this application adopts components of a whole that can function independently part to compress tightly the processing mode of assembly, has abandoned traditional welding mode, detains the first sealing washer of structure compression of taking off of positive knot through yin, and this kind of assembly mode is simple reliable.

Description

Automobile-used urea filling head

Technical Field

The utility model relates to the technical field of automobiles, more specifically especially, involve an automobile-used urea filling head.

Background

The application provides an automobile-used urea filling head is applied to car urea filling system. With the increasing tightening of the national emission standards of vehicles, the selective oxidation-reduction reaction of urea and the NOx of automobile emissions becomes a primary choice for solving the pollution of automobile emissions. The reduction absorption reaction mechanism of the acid urea solution is that urea generates strong oxidation-reduction reaction under an acid medium through nitrogen oxide, so that toxic NO is reduced into nitrogen.

Urea belongs to consumptive liquid on the automobile, and needs to be added at irregular intervals, and the urea storage device urea case is often placed in the automobile body and is sheltered by automobile sheet metal, so a special channel is needed for introducing urea into the urea case. The urea normally reaches the urea tank of the urea storage vessel through the urea filling head and a pipeline communicated with the urea filling head. The existing urea filling head is molded by adopting a molding mode of welding after injection molding of split parts, and a hot plate heating mode is mostly adopted during welding, but the molding mode has the following defects:

the urea filling head split part processing mode is injection molding, the raw material adopted by injection molding has good fluidity, an adhesion effect can be generated with a heating source in a welding and heating process, and a wire drawing phenomenon can be generated in a heat source withdrawing process, so that the appearance of the part is influenced.

Secondly, in the welding process of the split part of the urea filling head, the split part is in contact with a hot plate, the welding rib is melted, the melted raw material is extruded until the thickness of the melted raw material is 0.2-0.5mm, the thickness is limited by the injection tolerance of the split part and the clamping tolerance of the split part during welding, the whole welding surface can not be ensured to be in full contact after the two split parts are in contact and assembled, and the leakage risk exists.

The welding mode of adoption is the hot plate welding, and the hot plate when contacting components of a whole that can function independently part and heating, melts raw and other materials and can produce adhesion phenomenon with the hot plate, and the hot plate is taken away and is melted raw and other materials that melt to can carbonize on the hot plate surface after the time overlength, when other components of a whole that can function independently parts of reheating, can adhere to the components of a whole that can function independently part surface that is heated, cause components of a whole that can function independently part surface carbonization, lead to the sealing performance of face of weld and the pull-off force of face of weld can't guarantee at last, and.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides an automobile-used urea filling head.

The application discloses automobile-used urea filling head includes:

the urea filling device comprises a filling head main body, a urea tank and a urea tank, wherein the filling head main body is used for forming a filling channel, and filled urea flows into the urea tank through the filling channel;

the end cover is buckled on the filling head main body in a buckling mode and comprises a cover body and a filling port;

the upper end part of the filling head main body is provided with a first buckling position arranged in the circumferential direction, the end cover is provided with a second buckling position matched with the first buckling position, and the second buckling position is convexly arranged along the outer periphery of the lower end part of the cover body;

a first sealing ring is arranged between the filling head main body and the end cover, and when the end cover is buckled on the filling head main body, the first sealing ring is compressed.

As the utility model provides an implementation scheme of automobile-used urea filling head, the end cover buckle is when filling head main part, first buckle position or second buckle position compress tightly first sealing washer.

As an embodiment of the urea filling head for the vehicle provided by the utility model, the urea filling head for the vehicle further comprises a magnet; the cover body is provided with a groove with a downward opening below, and the magnet is positioned in the groove of the end cover.

As an embodiment of the automotive urea filling head, the automotive urea filling head still includes the filling gun support body, the filling gun support body includes the cylindrical injection gun bullport of cavity, the filling gun support body is set up in the filling head main part.

As an embodiment of the automotive urea filling head provided by the utility model, the filling head main part includes:

the filling channel shell is used for forming a filling channel and comprises a shell body and a filling hole;

and the spill-proof cavity is separated from the filling channel, and the spill-proof cavity is communicated with the filling channel through the spill hole.

As an embodiment of the urea filling head for the vehicle provided by the present invention, the urea filling head for the vehicle further includes a breather pipe valve body, and the breather pipe valve body includes a valve body accommodating chamber and a breather pipe joint formed below the valve body accommodating chamber;

the vent pipe valve body is buckled below the anti-overflow cavity in a buckling mode, and the valve body accommodating chamber and the anti-overflow cavity jointly form an anti-overflow space;

the lower end part of the anti-overflow cavity is provided with a third buckling position which is arranged in the circumferential direction, the upper end part of the valve body accommodating chamber is provided with a fourth buckling position which is matched with the third buckling position, and the fourth buckling position is convexly arranged along the outer peripheral edge of the upper end part of the valve body accommodating chamber;

the anti-overflow valve is characterized in that a second sealing ring is arranged between the valve body accommodating chamber and the anti-overflow cavity, and when the vent pipe valve body is buckled on the anti-overflow cavity, the third buckling position or the fourth buckling position compresses the second sealing ring.

As an embodiment of the urea filling head for the vehicle provided by the utility model, the cross section of the valve body accommodating chamber is larger than that of the anti-overflow cavity; the axial direction of the vent pipe interface is arranged obliquely downwards.

As an embodiment of the urea filling head for vehicles provided by the present invention, the housing body includes an accommodating chamber located at an upper portion and an inverted cone structure located at a lower portion, and the filling hole is connected to the inverted cone structure;

the height of the lower end surface of the injection gun guide hole is positioned in the height range of the inverted conical structure;

the axial direction of the injection hole is obliquely arranged below.

As an embodiment of the urea filling head for the vehicle provided by the utility model, the filling head main body is internally provided with a plurality of ribs which are arranged convexly, the lower end of the filling gun supporting body is supported on the ribs, and the upper end of the filling gun supporting body is positioned below the magnet;

the filling gun support body also comprises a first layer plate positioned outside the injection gun guide hole; the filling gun supporting body is supported on a rib of the filling head main body through a first layer plate;

be provided with a plurality of ribs on the below inner wall of pouring into rifle bullport, the rib is used for spacing to pouring into the rifle.

As an embodiment of the urea filling head for vehicles provided by the utility model, the filling gun support body further comprises a second layer plate and a third layer plate, wherein the first layer plate, the second layer plate and the third layer plate are distributed in sequence from bottom to top outside the filling gun guide hole;

the height of the second layer plate is higher than that of the overflow hole, and the outline of the second layer plate is matched with the shape of the inner wall of the filling channel shell;

and a circle of convex part is arranged above the third layer plate and is positioned right below the magnet.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the processing efficiency is improved: the split part, namely the filling head main body and the end cover are connected in a press-fitting mode through a buckle type structure, so that the forming time can be effectively shortened and the processing efficiency can be improved compared with the welding process.

2) The sealing performance is improved: during assembly, the end cover is buckled on the filling head main body to enable the first sealing ring to be compressed, and the sealing effect of the part can be effectively improved by the sealing mode of compressing the sealing gasket.

3) And (3) improving the appearance of the part: because the split parts are processed in an assembly mode, the process of melting raw materials is avoided, the wire drawing phenomenon is avoided, and the appearance of the parts can be effectively improved.

4) Part structural strength promotes: compared with the welding of split parts, the assembling mode adopts a buckle type structure to tightly buckle the parts together, the whole circle of buckles need to be damaged when the parts are damaged by separation, and the destructive force of the buckles is larger than the welding adhesive force when the raw materials are melted by 0.2-0.5mm in the welding process.

5) The stability of part state is promoted: the parts (the filling head main body and the end cover) are not adhered to each other by melting raw materials, so that the instability of the parts caused by material sticking during heating of a hot plate can be effectively avoided.

Drawings

FIG. 1 is a schematic perspective view of a vehicle urea filling head according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a vehicle urea filling head according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of a vehicle urea fill head shown in FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

fig. 5 is a partially enlarged view of C in fig. 3.

The attached drawings are marked as follows:

an end cover 1, a magnet 2, a filling gun supporting body 3, a filling head main body 4, a metal sleeve 5, a vent pipe valve body 6, a first sealing ring 7, a second sealing ring 8,

A filling port 11, a cover body 12, a groove 13, a second buckling position 101,

An injection gun guide hole 301, a first layer plate 302, a second layer plate 303, a third layer plate 304, a boss 305,

A shell body 41, an injection hole 42, an overflow preventing cavity 43, a containing cavity 401, an inverted cone-shaped structure 402, ribs 403, an overflow hole 404, a first buckling position 405, a third buckling position 406,

A valve body receiving chamber 61, a breather tube interface 62, and a fourth snap location 601.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The utility model discloses to the background art, a vehicle urea filling head is proposed.

As shown in fig. 1 to 5, the urea filling head for a vehicle of the present application includes:

the urea filling device comprises a filling head main body 4, a filling gun and a urea tank, wherein the filling head main body 4 is used for forming a filling channel, and urea filled by the filling gun flows into the urea tank through the filling channel;

an end cap 1, the end cap 1 of the present embodiment snap-fits to the fill head body 4, the end cap 1 including a cover 12 and a fill port 11.

The filling head body 4 has a first snap-fit position 405 provided along the circumferential direction at the upper end portion thereof, and the end cap 1 has a second snap-fit position 101 matching the first snap-fit position 405, specifically, the second snap-fit position 101 is provided to protrude along the outer peripheral edge of the lower end portion of the cover body 12. More preferably, the first snap-in location 405 is provided circumferentially around the upper end of the fill head body 4, and the second snap-in location 101 is provided circumferentially around the outer periphery of the lower end of the cover 12.

In a specific embodiment, the first snap-fit location 405 of the fill head body 4 can be a male snap-fit location, the second snap-fit location 101 of the end cap 1 can be a female snap-fit location, and the second snap-fit location 101 is located outside the first snap-fit location 405 and surrounds the first snap-fit location 405. It is understood that the arrangement of the first snap-fit location 405 and the second snap-fit location 101 is not limited thereto.

A first sealing ring 7 is arranged between the filling head main body 4 and the end cover 1, and the first sealing ring 7 is extruded during assembly to play a sealing function. When the end cap 1 is assembled with the filling head body 4 in the up-down direction and the end cap 1 is snapped onto the filling head body 4, the first snap-fit location 405 and the second snap-fit location 101 snap together, and a set relative positional relationship is maintained between the filling head body 4 and the end cap 1. At this time, the first seal 7 is compressed between the fill head body 4 and the end cap 1. By designing the thickness of the first sealing ring 7 appropriately, the amount of compression is controlled within a reasonable range to obtain better sealing performance.

In a preferred embodiment, the thickness of the first sealing ring 7 is 1-2 mm, and the thickness after being compressed is 40-60% of the natural state.

When compressed, one surface of the first seal 7 abuts the fill head body 4, and the other surface of the first seal 7 abuts the end cap 1.

In order to better position the first sealing ring 7 during assembly. The filler head body 4 or the end cover 1 is provided with a positioning portion.

Preferably, when the end cap 1 is snapped onto the fill head body 4, the first snap-fit location 405 or the second snap-fit location 101 compresses the first seal 7. Taking fig. 3 as an example, a positioning groove is arranged on the end cover 1, and the first sealing ring 7 is located in the positioning groove. When the first buckling position 405 and the second buckling position 101 are buckled together, the first buckling position 405 of the filling head main body 4 is arranged opposite to the positioning groove, and the upper end surface of the first buckling position 405 of the filling head main body 4 abuts against the first sealing ring 7.

It will be appreciated that, as an alternative embodiment (not shown), the filler head body 4 can also be provided with a positioning groove in which the first sealing ring 7 is located. The first buckling position 405 of the filling head main body 4 can be a buckle female buckle, the second buckling position 101 of the end cover 1 is a buckle male buckle, and the first buckling position 405 is located on the outer side of the second buckling position 101 and wraps the second buckling position 101. When the first buckle position 405 and the second buckle position 101 are buckled together, the second buckle position 101 of the end cover 1 is opposite to the positioning groove, and the lower end surface of the second buckle position 101 of the end cover 1 abuts against the first sealing ring 7.

The first seal ring 7 is, for example, a rubber seal ring.

The end cover 1 is made of plastic, and the filling head main body 4 is made of plastic.

The end cover 1 and the filling head main body 4 adopt a processing mode of split part pressing assembly, a traditional welding mode is abandoned, the first sealing ring 7 is compressed through a tightening structure of the female buckle and the male buckle, and the assembly mode is simple and reliable.

The processing technology of the urea filling head for the vehicle is simpler and more convenient, and the sealing performance and the structural strength are more reliable.

The vehicle urea filling head of the embodiment of the application further comprises a magnet 2. As shown in fig. 3, a recess 13 opened downward is provided below the lid 12, and the magnet 2 is located in the recess 13 of the end cap 1. The inner ring of the magnet 2 is in interference fit with the groove 13.

The magnet 2 is a permanent magnet 2 made of rare metal materials such as neodymium iron boron. The magnet 2 is used to distinguish between a urea dispensing gun and a fuel dispensing gun to avoid misfuelling at the urea dispensing head.

The vehicle urea filling head of the specific embodiment of the application further comprises a filling gun supporting body 3, the filling gun supporting body 3 can be made of plastic, the function of the filling gun supporting body is to support the urea filling gun and have a limiting function, and the filling gun supporting body is a mechanism for limiting the filling gun. The filler gun support body 3 is disposed within the filler head body 4. The filling gun support 3 includes a hollow columnar injection gun guide hole 301.

The fill head body 4 of the particular embodiment of the present application includes a fill passage housing and a spill proof chamber 43.

A filling channel housing for forming a filling channel, which includes a housing body 41 and a filling hole 42. The injection hole 42 is located below the case body 41.

The spill-proof chamber 43 and the filling channel are separated from each other and the spill-proof chamber 43 communicates with the filling channel via a spill orifice 404.

The spill-proof chamber 43 is separated from the filling channel housing by a partition wall, on which the spill orifice 404 is arranged.

The spill proof chamber 43 may be formed on one side of the fill passage housing.

The automobile-used urea filling head of this application embodiment still includes breather pipe valve body 6. The breather pipe valve body 6 includes a valve body accommodating chamber 61 and a breather pipe joint 62 formed below the valve body accommodating chamber 61. The vent tube interface 62 is for connection

And the breather pipe is used as a breathing device during urea filling. The material of the vent pipe valve body 6 is plastic.

The lower extreme opening in anti-overflow chamber 43, the upper end opening of breather pipe valve body 6 valve

body accommodation chamber

61, 6 upper ends of breather pipe valve bodies buckle in the below in anti-overflow chamber 43, and valve body accommodation chamber 61 and anti-overflow chamber 43 have constituted anti-overflow space jointly.

The lower end of the spill-proof cavity 43 is provided with a third buckling position 406 arranged along the circumferential direction, the upper end of the valve body accommodating chamber 61 is provided with a fourth buckling position 601 matched with the third buckling position 406, and the fourth buckling position 601 is convexly arranged along the outer circumference of the upper end of the valve body accommodating chamber 61. More preferably, the third latching portion 406 is disposed along a circumferential direction at a lower end of the spill prevention chamber 43, and the fourth latching portion 601 is disposed along an upper end of the valve body accommodation chamber 61.

A second sealing ring 8 is arranged between the valve body accommodating chamber 61 and the spill-proof cavity 43, and when the vent pipe valve body 6 is buckled on the spill-proof cavity 43, the third buckling position 406 or the fourth buckling position 601 tightly presses the second sealing ring 8. For example, the second sealing ring 8 may be positioned such that the upper end surface of the fourth snap-fit location 601 of the valve body receiving chamber 61 seals against the second sealing ring 8 at the third snap-fit location 406 of the spill prevention cavity 43. The principle is the same as that of the first sealing ring 7, and is not described in detail herein.

Preferably, the cross-sectional area of the valve body accommodating chamber 61 is larger than the cross-sectional area of the spill prevention chamber 43; the cross-sectional area of the lower portion of the spill-resistant chamber 43 is greater than the cross-sectional area of the upper portion of the spill-resistant chamber 43. The ventilation pipe joint 62 is disposed obliquely downward in the axial direction.

The case body 41 of the present embodiment includes an accommodating chamber 401 at an upper portion and an inverse tapered structure 402 at a lower portion, and the injection hole 42 is connected to the inverse tapered structure 402. The cross-sectional area of the receiving chamber 401 is larger, the cross-sectional area of the filling hole 42 is smaller, and the filling channel housing is funnel-shaped. The height of the lower end face of the injection gun guide hole 301 is within the height range of the inverted conical structure 402. The injection hole 42 is provided obliquely downward in the axial direction.

The fill head body 4 of the particular embodiment of the present application has a plurality of raised ribs 403 therein. The lower end of the filling gun support body 3 is supported on the rib 403; the upper end of the filling gun support body 3 abuts against the lower side of the magnet 2, and the gap between the upper end of the filling gun support body 3 and the magnet 2 is small, so that the filling gun support body 3 is restrained between the rib 403 and the magnet 2.

As shown in fig. 3, ribs 403 are protrudingly formed on the inner wall of the reverse tapered structure 402 of the case body 41. The fill gun support 3 further includes a first tier plate 302 located outside the injection gun guide hole 301, and the fill gun support 3 is supported on the rib 403 of the fill head main body 4 via the first tier plate 302. The ribs 403 may also serve to dampen turbulence caused by urea injection from the gun during urea filling.

A plurality of ribs for limiting the injection gun are provided on the lower inner wall of the injection gun guide hole 301.

Furthermore, the fill gun support 3 comprises a second layer 303 and a third layer 304. Wherein, the first layer plate 302, the second layer plate 303 and the third layer plate 304 are distributed in turn from bottom to top outside the injection gun guide hole 301.

The second tier plate 303 is higher than the overflow aperture 404 and the profile of the second tier plate 303 matches the shape of the inner wall of the fill channel housing.

In the height range between the second layer plate 303 and the third layer plate 304, the hollow cylindrical structure of the injection gun guide hole 301 is further provided with a hollow hole, and during the urea injection period, if urea overflows into the accommodating cavity 401 of the housing body 41, the overflowed urea flows into the spill-proof cavity 43 through the overflow hole 404 and enters the valve body accommodating chamber 61, and finally flows into the urea tank through the air vent pipe joint 62.

A circle of convex parts 305 are arranged above the third layer plate 304, the convex parts 305 are positioned right below the magnet 2, and the gap between the convex parts 305 and the magnet 2 is small.

The urea filling head for the vehicle has the advantages that the filling port 11 is provided with external threads, the filling hole 42 is provided with external threads, and the vent pipe joint 62 is also provided with external threads.

The automobile urea filling head is characterized in that the filling head main body 4 is also provided with a positioning hole for fixing the automobile urea filling head, a metal sleeve 5 is embedded in the positioning hole, and the metal sleeve 5 ensures that the automobile urea filling head can be positioned more firmly after being installed.

The utility model has the advantages as follows:

It is to be understood that the above-described embodiments are only some of the embodiments of the present application, and not all embodiments of the present application. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims

1. A urea filling head for a vehicle, characterized by comprising:

2. The urea filling head for a vehicle according to claim 1, wherein the first snap-fit location or the second snap-fit location compresses the first seal ring when the end cap is snapped onto the filling head body.

3. The urea filling head for a vehicle according to claim 1, further comprising a magnet; the cover body is provided with a groove with a downward opening below, and the magnet is positioned in the groove of the end cover.

4. The urea filling head for a vehicle according to claim 3, further comprising a filling gun support body that includes a hollow cylindrical filling gun guide hole, the filling gun support body being provided in the filling head main body.

5. The urea fill head for a vehicle according to claim 4, wherein said fill head body comprises:

6. The vehicle urea fill head of claim 5, further comprising a breather tube valve body including a valve body receiving chamber and a breather tube interface formed below the valve body receiving chamber;

7. The vehicular urea fill head of claim 6, wherein the valve body receiving chamber has a cross-section greater than a cross-section of the spill-proof chamber; the axial direction of the vent pipe interface is arranged obliquely downwards.

8. The urea filling head for a vehicle according to claim 5, wherein the housing body comprises an accommodating cavity at an upper portion and an inverted cone structure at a lower portion, and the filling hole is connected with the inverted cone structure;

the axial direction of the injection hole is obliquely arranged below.

9. The urea filling head for a vehicle according to claim 5, wherein the filling head body has a plurality of ribs protruding therefrom, the lower end of the filling gun support is supported by the ribs, and the upper end of the filling gun support is located below the magnet;

10. The vehicle urea filling head according to claim 9, wherein the filling gun support further comprises a second layer plate and a third layer plate, and the first layer plate, the second layer plate and the third layer plate are distributed outside the filling gun guide hole in sequence from bottom to top;