CN214741887U

CN214741887U - Pump housing applied to urea pump

Info

Publication number: CN214741887U
Application number: CN202120782896.9U
Authority: CN
Inventors: 李平; 曹友国; 刘致达
Original assignee: LOTUSFAIRY POWER TECHNOLOGIES CORP
Current assignee: LOTUSFAIRY POWER TECHNOLOGIES CORP
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-11-16
Anticipated expiration: 2031-04-16

Abstract

The utility model discloses a pump housing applied to a urea pump, which comprises a shell, a plug connector and a terminal, wherein the plug connector is provided with a plug space, one end of the terminal extends into the shell and is connected with a circuit board in the urea pump, the other end of the terminal passes through the plug connector and extends into the plug space of the plug connector, the shell and the plug connector are integrally formed, and the shell and the plug connector are in seamless connection; supply in the grafting space of plug connector the position that the terminal passed sets up seal part, the utility model discloses in relevant parts such as connector are directly inlayed on the casing, make the whole injection moulding of casing and relevant spare part, integrated into one piece eliminated the connector with gap between the casing makes it become whole part, has improved the sealing performance of pump shell, has realized integrating of pump shell, optimizes assembly process, improves the packaging efficiency of pump.

Description

Pump housing applied to urea pump

Technical Field

The utility model relates to a be applied to the pump shell field of urea pump. More specifically, the utility model relates to a sealed effectual pump shell who is applied to urea pump.

Background

When an internal combustion engine of an automobile, such as a diesel engine, is operated, nitrogen oxides (NOx) are generated with an excessive amount of oxygen in many cases, thereby causing environmental pollution. In order to meet the increasingly stringent emission requirements and reduce the emission of nitrogen oxides, NOx in the exhaust gas needs to be reduced into nitrogen and water, and usually, before the exhaust gas enters the catalyst, a urea solution is injected into the exhaust gas as a reducing agent to reduce the NOx, and the operation is specifically realized by pumping the urea solution into the exhaust gas in an exhaust pipeline after the urea solution is absorbed from a urea tank by a urea supply pump.

In the urea pump, the connector is not only used for transmitting a signal command sent by an engine ECU (electronic control unit) to the pump, but also is responsible for transmitting electricity for the operation of the urea pump, however, under some conditions, water can permeate into the pump body from a gap between a terminal at the connector and the connector, and the problem of short circuit and the like of the pump is caused in serious cases.

SUMMERY OF THE UTILITY MODEL

To achieve these objects and other advantages in accordance with the purpose of the invention, a pump housing for a urea pump is provided, comprising a housing, a connector and a terminal, wherein the connector has a plugging space, one end of the terminal extends into the housing to be connected with a circuit board in the urea pump, and the other end of the terminal passes through the connector to extend into the plugging space of the connector,

the shell and the plug connector are integrally formed, so that the shell and the plug connector are connected in a seamless mode; and a sealing part is arranged at the part of the plugging space of the plug connector, through which the terminal passes.

According to the utility model discloses a preferred embodiment, be applied to the pump shell of urea pump the one deck of the internal surface filling of the grafting space of plug connector is sealed gluey, in order to seal the terminal with the connection position of plug connector.

According to a preferred embodiment of the present invention, the pump housing for a urea pump, wherein the terminal is located an inclined boss is formed at a root of one end of the housing to prevent water from gathering at the root of the terminal.

According to a preferred embodiment of the present invention, the pump housing for a urea pump, the inclined plane boss has a first surface in a conical shape, and the first surface is smooth.

According to the utility model discloses a preferred embodiment, be applied to the pump housing of urea pump, along the terminal is followed past in the casing the grafting space extending direction of plug connector, the cross sectional dimension of first face progressively increases.

According to the utility model discloses a preferred embodiment, be applied to the pump housing of urea pump, still integrated into one piece is provided with overflow valve and feed liquor end on the casing.

According to the utility model discloses a preferred embodiment, be applied to the pump housing of urea pump, the plug connector part is inlayed shell surface, and the two junction does not have the recess.

According to the utility model discloses a preferred embodiment, be applied to the pump housing of urea pump, have the grafting passageway in the plug connector, for the terminal passes, sealing element fills in the grafting passageway, and will the terminal wraps up including.

According to the utility model discloses a preferred embodiment, be applied to the pump housing of urea pump, the seal part both ends are stretched out respectively grafting passageway both ends, partial parcel respectively live the terminal both ends.

The utility model discloses at least, include following beneficial effect:

1. the utility model discloses in relevant parts such as connector are directly inlayed on the casing, make the whole injection moulding of casing and relevant spare part, integrated into one piece eliminated the connector with gap between the casing makes it become whole part, has improved the sealing performance of pump shell, has realized integrating of pump shell, optimizes assembly process, improves the packaging efficiency of pump.

2. In order to further improve the sealing grade, a layer of sealant is filled on the inner surface of the plugging space of the plug connector to seal the connecting part of the terminal and the plug connector. The layer of sealant can only cover the connection part of the terminal and the plug connector, and can also cover all the inner surfaces of the plugging space of the plug connector.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic view of the overall structure of a pump housing applied to a urea pump according to the present invention;

fig. 2 is a schematic cross-sectional view of a pump housing for a urea pump according to the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

As shown in fig. 1 and fig. 2, the pump housing applied to the urea pump of the present invention includes a housing 1, a connector 2 and a terminal 3, wherein the connector 2 has a plugging space 21, one end of the terminal 3 extends into the housing 1 to be connected to a circuit board in the urea pump, and the other end of the terminal passes through the connector 2 to extend into the plugging space 21 of the connector 2, the housing 1 and the connector 2 are integrally formed, and the housing 1 and the connector 2 are seamlessly connected; the shell 1 is also provided with an overflow valve 5 and a liquid inlet end 6 in an integrated manner. A sealing member 4 is provided in a portion of the plug space 21 of the plug 2 through which the terminal 3 passes.

In the embodiment, the connector 2 and other related parts are directly embedded on the shell 1, so that the shell 1 and the related parts are integrally molded by an embedded injection molding process, and the gap between the connector and the shell 1 is eliminated by integral molding, so that the connector and the shell become whole parts, the sealing performance of the pump shell is improved, the integration of the pump shell is realized, the assembly process is optimized, and the assembly efficiency of the pump is improved.

In addition, considering that a small gap is formed between the plastic body and the terminal under extreme temperature conditions due to a large difference between thermal expansion rates of the plastic and the metal, a layer of sealant 8 is injected into the inner surface of the plugging space of the plug-in unit 2 to seal the connection part of the terminal 3 and the plug-in unit 2. The layer of sealant 8 may cover only the connection portion between the terminal 3 and the connector 2, or may cover all the inner surface of the insertion space of the connector 2.

The sealant 8 is preferably a sealing material, such as but not limited to silicone, so as to protect the terminal 3 and achieve good sealing.

In order to further improve the sealing performance and prevent water from gathering at the root of the terminal, a bevel boss 7 is formed at the root of one end of the terminal in the shell, and water can flow down from the bevel of the bevel boss 7.

As will be further described below, the inclined plane boss 7 has a first conical surface, and the first conical surface is smooth, so that water can be further prevented from collecting on the surface of the inclined plane boss 7, and short circuit between the terminals 3 can be avoided.

In another embodiment, along the extending direction of the terminal 3 from the housing 1 to the plugging space of the plug connector 2, the cross-sectional size of the first surface is gradually increased to form an inclined surface, so as to avoid water from gathering at the bottom of the plug connector 2.

In another embodiment, the plug connector 2 is partially embedded on the surface of the shell 1, and the joint of the two has no groove, so that water accumulation is avoided.

In another embodiment, the plug connector 2 has a plug channel 21 for the terminal 3 to pass through, and the sealing member 4 is filled in the plug channel 21 and wraps the terminal 3 inside, so as to protect the terminal 3 which needs to be electrically/signal connected.

In another embodiment, two ends of the sealing component 4 respectively extend out of two ends of the inserting channel 21 and respectively partially wrap two ends of the terminal, so that the sealing component 4 can realize the connection between the housing 1 and the terminal 3 and the inserting component 2, and can perform large-range sealing at the same time, and the sealing effect is better compared with small-range sealing.

The sealing member 4 is made of a plastic material, such as but not limited to silicone, so as to protect the terminal 3 and achieve good sealing.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. A pump shell applied to a urea pump comprises a shell, a plug connector and a terminal, wherein the plug connector is provided with a plug space, one end of the terminal extends into the shell to be connected with a circuit board in the urea pump, the other end of the terminal penetrates through the plug connector to extend into the plug space of the plug connector,

2. The pump housing for a urea pump as claimed in claim 1, wherein a layer of sealant is injected into an inner surface of the insertion space of the insertion member to seal a connection portion of the terminal and the insertion member.

3. The pump housing for a urea pump as claimed in claim 2, wherein a root portion of one end of said terminal in said housing is formed with a slope projection to prevent water from accumulating at said root portion.

4. The pump housing for a urea pump as claimed in claim 3, wherein said sloped boss has a first face with a conical shape, said first face having a smooth surface.

5. The pump housing for a urea pump as claimed in claim 4, wherein the first face has a cross-sectional size that gradually increases along a direction in which the terminal extends from the inside of the housing toward the insertion space of the insertion piece.

6. The pump housing for the urea pump as recited in claim 1, wherein the casing further comprises an overflow valve and a liquid inlet end integrally formed thereon.

7. The pump housing for a urea pump as set forth in claim 1, wherein said plug is partially embedded in said housing surface and has no recess at the junction thereof.

8. The pump housing for a urea pump as claimed in claim 1, wherein said plug member has a plug passage therein for said terminal to pass through, and said sealing member fills said plug passage and encloses said terminal.

9. The pump housing for a urea pump as claimed in claim 8, wherein both ends of the sealing member extend out of both ends of the insertion passage, respectively, and partially wrap both ends of the terminal.