CN219509727U - Butterfly valve type exhaust gas circulation valve - Google Patents

Abstract

The utility model discloses a butterfly valve type waste gas circulation valve, comprising: the device comprises a shell, a rotating shaft, a butterfly sheet and a screw; the housing has an air passage for the passage of the gas; the rotating shaft is arranged inside the shell, and at least one part of the rotating shaft is positioned in the air passage; the butterfly sheet is arranged in the air passage, the butterfly sheet is fixed on the rotating shaft through one screw, and the butterfly sheet can rotate along with the rotating shaft. The utility model can effectively save time cost, improve economy and save material cost of one screw.

Description

Butterfly valve type exhaust gas circulation valve

Technical Field

The utility model relates to the technical field of valves, in particular to a butterfly valve type waste gas circulation valve.

Background

An exhaust gas recirculation valve is an electro-mechanical integrated product mounted on a gasoline or diesel engine for controlling the amount of exhaust gas recirculation fed back to the intake system, and functions to control the amount of exhaust gas entering the manifold so that a certain amount of exhaust gas flows into the intake manifold for recirculation.

Butterfly valve formula exhaust gas recirculation valve is one of them exhaust gas recirculation valve, in the butterfly valve formula exhaust gas recirculation valve on the market at present, and butterfly plate and axle all adopt two screws to fasten, and butterfly valve formula exhaust gas recirculation valve bore is less, consequently need to drive into the screw twice in the production process, and the time cost is higher, and the economic nature is relatively poor, if need to drive into two screws simultaneously, then need customize special screw rifle, has increased manufacturing cost.

Disclosure of Invention

The utility model aims to solve the problems of high time cost and poor economical efficiency caused by the fact that the screw is required to be driven twice in the production process of the conventional butterfly valve type waste gas circulation valve. The utility model provides a butterfly valve type waste gas circulation valve, which can effectively reduce the time cost in the production process and improve the economy.

To solve the above technical problem, an embodiment of the present utility model discloses a butterfly valve type exhaust gas recirculation valve, which is characterized by comprising: the device comprises a shell, a rotating shaft, a butterfly sheet and a screw;

the housing has an air passage for the passage of the gas;

the rotating shaft is arranged inside the shell, and at least one part of the rotating shaft is positioned in the air passage;

the butterfly sheet is arranged in the air passage, the butterfly sheet is fixed on the rotating shaft through one screw, and the butterfly sheet can rotate along with the rotating shaft.

By adopting the technical scheme, the butterfly sheet is fixed on the rotating shaft through one screw, and only one screw is needed to be beaten in the production process, so that the time cost is saved, the economy is improved, the material cost of one screw is saved, a special custom-made screw gun is not needed, and the manufacturing cost is saved.

According to another embodiment of the utility model, the inner diameter of the airway is 20 to 35mm.

According to another embodiment of the utility model, one of the screws is provided at a central position of a portion of the shaft located in the air passage.

By adopting the technical scheme, the screw is arranged at the central position of the rotating shaft in the air passage, so that the screw gun can work conveniently, and the screw gun is prevented from interfering with the side wall of the air passage.

According to another specific embodiment of the utility model, the rotating shaft is provided with a through groove, two sides of the through groove are respectively provided with a first side wall and a second side wall, and the first side wall and the second side wall are respectively parallel to the axial direction;

at least a portion of the tab is positioned in the through slot.

According to another specific embodiment of the utility model, the first side wall is provided with a first threaded hole, the second side wall is provided with a second threaded hole, and the butterfly piece is provided with a through hole;

the screw sequentially passes through the first threaded hole, the through hole and the second threaded hole to fix the butterfly sheet on the rotating shaft.

According to another specific embodiment of the present utility model, the through groove has a third side wall and a fourth side wall, the third side wall and the fourth side wall are disposed at intervals along an axial direction and are perpendicular to the first side wall and the second side wall respectively, a central portion of the third side wall protrudes towards the butterfly sheet along the axial direction to form a first limiting portion, and a central portion of the fourth side wall protrudes towards the butterfly sheet along the axial direction to form a second limiting portion;

the radial both ends of butterfly piece form third spacing portion and fourth spacing portion through cutting one section circular arc, third spacing portion for first spacing portion sets up, fourth spacing portion for second spacing portion sets up, in order to prevent the butterfly piece for the pivot rotates.

According to another embodiment of the present utility model, the first limiting portion includes a first limiting edge and a second limiting edge, and the first limiting edge and the second limiting edge are disposed at an obtuse angle;

the second limiting part comprises a third limiting edge and a fourth limiting edge, and the third limiting edge and the fourth limiting edge are arranged at an obtuse angle.

By adopting the technical scheme, when the butterfly sheet has a trend of rotating relative to the rotating shaft, the first limiting part is abutted with the third limiting part, the second limiting part is abutted with the fourth limiting part so as to prevent the butterfly sheet from continuing to rotate, and the butterfly sheet can be effectively prevented from rotating relative to the rotating shaft through the cooperation of the first limiting part and the third limiting part and the cooperation of the second limiting part and the fourth limiting part.

According to another embodiment of the present utility model, there is further provided a needle bearing and a bush;

along the axial direction, one side of the shell is used for being connected with the gear box, and the other side is used for being connected with the end cover;

the rotating shaft is arranged in the shell, one end, close to the gear box, of the rotating shaft along the axial direction is a first end, and one end, close to the end cover, of the rotating shaft along the axial direction is a second end;

the needle roller bearing is sleeved at the first end part and is connected with the shell;

the bushing is sleeved at the second end part and connected with the shell.

By adopting the technical scheme, one end of the rotating shaft is sleeved with the needle bearing, and the other end is sleeved with the bushing. Because the cost of the bushing is far lower than that of the needle bearing, compared with the case that the needle bearing is sleeved at the two ends of the rotating shaft, the cost of the technical scheme is lower.

According to another specific embodiment of the present utility model, a first accommodating portion and a second accommodating portion are provided in the housing, the needle bearing is accommodated in the first accommodating portion, and the bush is accommodated in the second accommodating portion.

According to another embodiment of the utility model, the first accommodation part is in interference fit with the needle bearing, and the second accommodation part is in interference fit with the bushing;

the needle roller bearing is in clearance fit with the rotating shaft, and the bushing is in clearance fit with the rotating shaft.

By adopting the technical scheme, the tightness of the butterfly valve type exhaust gas circulation valve can be ensured, the gas is prevented from entering the gear box to corrode internal parts, the service life can be prolonged, and the rotating shaft can respond faster and rotate in time.

Drawings

FIG. 1 shows a cross-sectional view of a prior art butterfly valve type exhaust gas recirculation valve;

FIG. 2 illustrates a cross-sectional view of a butterfly valve exhaust gas recirculation valve of an embodiment of the present utility model;

FIG. 3 illustrates a cross-sectional view of the air passage of a butterfly valve exhaust gas recirculation valve of an embodiment of the present utility model;

FIG. 4 illustrates a front view of a shaft of a butterfly valve exhaust gas recirculation valve of an embodiment of the utility model;

FIG. 5 illustrates a side view of a shaft of a butterfly valve exhaust gas recirculation valve of an embodiment of the utility model;

FIG. 6 is a perspective view showing a butterfly plate of a butterfly valve type exhaust gas recirculation valve according to an embodiment of the utility model mounted to a rotary shaft;

fig. 7 shows an enlarged view at a in fig. 2;

fig. 8 shows an enlarged view at G in fig. 2;

fig. 9 shows an enlarged view at B in fig. 2;

fig. 10 shows an enlarged view at C in fig. 2.

Reference numerals illustrate:

1. the housing includes, by way of example, a first receiving portion, 12, a second receiving portion, 2, a pivot shaft, 21, a threaded bore, 211, a first threaded bore, 2111, a first side wall, 212, a second threaded bore, 2121, a second side wall, 2131, a third side wall, 2132, a first retainer portion, 2133, a first retainer portion, 2134, a second retainer portion, 2141, a fourth side wall, 2142, a second retainer portion, 2143, a third retainer portion, 2144, a fourth retainer portion, 22, a through slot, 23, a first end portion, 24, a second end portion, 25, a first retainer portion, 251, a first retainer portion, 252, a second retainer portion, 3, a tab, 31, a third retainer portion, 32, a fourth retainer portion, 4, a screw, 5, a needle bearing, 6, a bushing, and 7.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Fig. 1 shows a cross-sectional view of a butterfly valve type exhaust gas recirculation valve, comprising: the device comprises a shell 1, a rotating shaft 2, a butterfly sheet 3, two screws 4 and a needle bearing 5. The rotating shaft 2 is arranged in the shell 1, the butterfly sheet 3 is fixed on the rotating shaft 2 through two screws 4, and needle bearings 5 are respectively sleeved at two ends of the rotating shaft. In the production process of fixing the butterfly plate 3 on the rotating shaft 2, the screw 4 needs to be driven into the rotating shaft 2 by a screw gun to fix the rotating shaft 2 and the butterfly plate 3, but because the caliber of an air passage of the butterfly valve type exhaust gas circulation valve is smaller, two screws 4 cannot be driven into the butterfly valve type exhaust gas circulation valve at the same time, the screws need to be driven into the butterfly valve type exhaust gas circulation valve at two times, so the time cost is higher, and the production efficiency is low; if two screws 4 are to be driven simultaneously, special screw guns must be customized and the manufacturing cost is high. In addition, the needle bearings 5 are sleeved at the two ends of the rotating shaft 2, so that the cost is high.

Referring to fig. 2 in combination with fig. 3, the present utility model provides another butterfly valve type exhaust gas recirculation valve comprising: a shell 1, a rotating shaft 2, a butterfly sheet 3 and a screw 4. Wherein the housing 1 has an air duct 7 (shown in fig. 3), the air duct 7 being intended for the passage of air. The rotary shaft 2 is mounted inside the housing 1, and at least a portion of the rotary shaft 2 is located in the air passage 7. The butterfly sheet 3 is arranged in the air passage 7, the butterfly sheet 3 is fixed on the rotating shaft 2 through a screw 4, the butterfly sheet 3 can rotate along with the rotating shaft 2, and the air passage 7 is opened or closed through the rotation of the butterfly sheet 3, so that gas passes through the air passage 7.

Compared with the butterfly valve type exhaust gas recirculation valve shown in fig. 1, the butterfly valve type exhaust gas recirculation valve provided by the embodiment adopts the screw 4 to fix the butterfly plate 3 on the rotating shaft 2, and only one screw 4 is required to be installed in the process of installing the butterfly plate 3, so that the time cost is saved. Compared with the scheme shown in fig. 1, the butterfly valve type exhaust gas circulation valve provided by the embodiment saves the material cost of one screw 4, does not need a complex clamp or tool, and is simple to install only by installing a screw gun. The utility model can reduce the time for installing the butterfly sheet 3 and the material cost of one screw 4 in the production process on the premise of ensuring the use performance.

Referring to fig. 3, the present utility model is not particularly limited with respect to the inner diameter E of the air passage 7. The inner diameter E of the airway 7 is illustratively 20 to 35mm. For example, the inner diameter E of the airway 7 is 25mm or 26mm.

In some possible embodiments, referring to fig. 2, a screw 4 is provided at the center of the portion of the shaft 2 located within the air channel 7. The screw 4 is arranged at the central position of the rotating shaft 2 in the air channel 7, so that the screw gun can work conveniently, and the screw gun is prevented from interfering with the side wall of the air channel 7.

In some possible embodiments, referring to fig. 4 and 5, the rotating shaft 2 is provided with screw holes 21 and through slots 22, wherein the number of screw holes 21 is two, a first screw hole 211 and a second screw hole 212, respectively. Specifically, the through groove 22 is flanked by a first side wall 2111 and a second side wall 2121, respectively, and the first side wall 2111 and the second side wall 2121 are parallel to the axial direction D, respectively. The first side wall 2111 is provided with a first threaded hole 211 and the second side wall 2121 is provided with a second threaded hole 212.

Accordingly, referring to fig. 6, the tab is provided with a through hole (not shown), and the screw 4 sequentially passes through the first screw hole 211 (not shown in fig. 6), the through hole, and the second screw hole 212 (not shown in fig. 6) to fix the tab 3 to the rotation shaft 2. When the tab 3 is mounted to the shaft 2, at least a portion of the tab 3 is positioned within the through slot 22.

In some possible embodiments, referring to fig. 3 in combination with fig. 7, the through groove 22 has a third side wall 2131 and a fourth side wall 2141, the third side wall 2131 and the fourth side wall 2141 are disposed at intervals along the axial direction and perpendicular to the first side wall 2111 and the second side wall 2121, respectively, a central portion of the third side wall 2131 protrudes toward the butterfly 3 along the axial direction D to form a first limiting portion 2132, and a central portion of the fourth side wall 2141 protrudes toward the butterfly 3 along the axial direction D to form a second limiting portion 2142, where the first limiting portion 2132 and the second limiting portion 2142 are used to prevent the butterfly 3 from rotating relative to the rotation shaft 2. Accordingly, the third limiting portion 31 and the fourth limiting portion 32 are formed by cutting a section of arc at two radial ends of the butterfly 3, the third limiting portion 31 is disposed opposite to the first limiting portion 2132, and the fourth limiting portion 32 is disposed opposite to the second limiting portion 2142, so as to prevent the butterfly 3 from rotating relative to the rotating shaft 2.

Since only one screw 4 is used to fix the tab 3 and the shaft 2, the tab 3 and the shaft 2 will rotate relatively, and thus the first limiting portion 2132 and the second limiting portion 2142 need to be provided to avoid rotation of the tab 3 relative to the shaft 2.

Specifically, referring to fig. 7, the first limiting portion 2132 includes a first limiting edge 2133 and a second limiting edge 2134, and the first limiting edge 2133 and the second limiting edge 2134 are disposed at an obtuse angle. Referring to fig. 8, the second limiting portion 2142 includes a third limiting edge 2143 and a fourth limiting edge 2144, and the third limiting edge 2143 and the fourth limiting edge 2144 are disposed at an obtuse angle.

Referring to fig. 7 in combination with fig. 8, when the tab 3 has a tendency to rotate clockwise in the F direction, the second limiting edge 2134 abuts against the third limiting portion 31, and at the same time, the third limiting edge 2143 abuts against the fourth limiting portion 32, so as to prevent the tab 3 from continuing to rotate; when the tab 3 has a tendency to rotate counterclockwise along the direction F, the first limiting edge 2133 abuts against the third limiting portion 31, and at the same time, the fourth limiting edge 2144 abuts against the fourth limiting portion 32, so as to prevent the tab 3 from continuing to rotate.

In some possible embodiments, referring to fig. 2 in combination with fig. 9 and 10, the butterfly valve type exhaust gas recirculation valve provided by the present utility model further comprises a needle bearing 5 and a bushing 6. Along the axial direction D, the housing 1 is provided on one side for connection to a gearbox (not shown) and on the other side for connection to an end cap (not shown).

Specifically, the end of the rotating shaft 2 near the gear box along the axial direction D is a first end 23 (as shown in fig. 9), and the end of the rotating shaft 2 near the end cover along the axial direction D is a second end 24 (as shown in fig. 10).

Referring to fig. 9, the needle bearing 5 is fitted over the first end portion 23 and connected to the housing 1. Referring to fig. 10, the bushing 6 is sleeved on the second end 24 and connected with the housing 1. Illustratively, the first end 23 is the area covered by the needle bearing 5 and the second end 24 is the area covered by the bushing 6.

Compared with the butterfly valve type exhaust gas recirculation valve shown in fig. 1, the butterfly valve type exhaust gas recirculation valve provided in this embodiment is provided with the bushing 6 sleeved at the second end 24 of the rotating shaft 2 to replace the needle bearing 5, i.e. one end of the rotating shaft 2 is sleeved with the needle bearing 5, and the other end is sleeved with the bushing 6. Since the cost of the bush 6 is far less than that of the needle bearing 5, the butterfly valve type exhaust gas recirculation valve provided by the embodiment has lower production cost and higher economical efficiency. The bush 6 can also function as a seal, wear protection, friction reduction, and corrosion protection, as with the needle bearing 5.

When the butterfly valve type exhaust gas recirculation valve provided in the present embodiment is mounted on an engine, the second end 24 of the sleeve 6 is close to the end cover, and the first end 23 of the sleeve needle bearing 5 is close to the gear box, so that the requirements of the second end 24 on the sealing property and the corrosion resistance are lower than those of the first end 23 on the rotating shaft 2. The sealing and corrosion protection properties of the bushing 6 can meet the requirements of practical use.

Therefore, the butterfly valve type exhaust gas circulation valve provided by the embodiment can reduce cost and improve economy on the premise of ensuring the service performance.

In some possible embodiments, referring to fig. 9 and 10, the housing 1 is internally provided with a first accommodation portion 11 and a second accommodation portion 12, the needle bearing 5 is accommodated in the first accommodation portion 11, and the bush 6 is accommodated in the second accommodation portion 22.

Specifically, the first accommodation portion 11 is in interference fit with the needle bearing 5, and the second accommodation portion 12 is in interference fit with the bushing 6, so that the tightness of the butterfly valve type exhaust gas circulation valve is guaranteed, the gas is prevented from entering the gearbox to corrode internal parts, and the service life can be prolonged.

In some possible embodiments, needle bearing 5 is in clearance fit with shaft 2, and bushing 6 is in clearance fit with shaft 2 to enable shaft 2 to respond faster and rotate in time.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (10)

1. A butterfly valve exhaust gas recirculation valve, comprising: the device comprises a shell, a rotating shaft, a butterfly sheet and a screw;

the shell is provided with an air passage for passing gas;

the rotating shaft is arranged inside the shell, and at least one part of the rotating shaft is positioned in the air passage;

the butterfly sheet is arranged in the air passage, the butterfly sheet is fixed on the rotating shaft through one screw, and the butterfly sheet can rotate along with the rotating shaft.

2. The butterfly valve exhaust gas recirculation valve of claim 1, wherein the inner diameter of the air passage is 20 to 35mm.

3. The butterfly valve exhaust gas recirculation valve of claim 2, wherein one of the screws is disposed at a center of a portion of the shaft within the air passage.

4. The butterfly valve type exhaust gas recirculation valve according to claim 3, wherein the rotating shaft is provided with a through groove, and a first side wall and a second side wall are respectively arranged at two sides of the through groove, and are respectively parallel to the axial direction;

at least a portion of the tab is positioned in the through slot.

5. The butterfly valve exhaust gas recirculation valve of claim 4, wherein the first sidewall has a first threaded hole, the second sidewall has a second threaded hole, and the tab has a through hole;

the screw sequentially passes through the first threaded hole, the through hole and the second threaded hole to fix the butterfly sheet on the rotating shaft.

6. The butterfly valve exhaust gas recirculation valve of claim 5, wherein the through groove has a third sidewall and a fourth sidewall, the third sidewall and the fourth sidewall are disposed at intervals along an axial direction and perpendicular to the first sidewall and the second sidewall, respectively, a center portion of the third sidewall protrudes toward the butterfly plate along the axial direction to form a first limit portion, and a center portion of the fourth sidewall protrudes toward the butterfly plate along the axial direction to form a second limit portion;

the radial both ends of butterfly piece form third spacing portion and fourth spacing portion through cutting one section circular arc, third spacing portion for first spacing portion sets up, fourth spacing portion for second spacing portion sets up, in order to prevent the butterfly piece for the pivot rotates.

7. The butterfly valve exhaust gas recirculation valve of claim 6, wherein the first limit portion includes a first limit edge and a second limit edge, the first limit edge and the second limit edge being disposed at an obtuse angle;

the second limiting part comprises a third limiting edge and a fourth limiting edge, and the third limiting edge and the fourth limiting edge are arranged at an obtuse angle.

8. The butterfly valve exhaust gas recirculation valve of any one of claims 1-7, further comprising a needle bearing and a bushing;

along the axial direction, one side of the shell is used for being connected with the gear box, and the other side is used for being connected with the end cover;

the rotating shaft is arranged in the shell, one end, close to the gear box, of the rotating shaft along the axial direction is a first end, and one end, close to the end cover, of the rotating shaft along the axial direction is a second end;

the needle roller bearing is sleeved at the first end part and is connected with the shell;

the bushing is sleeved at the second end part and connected with the shell.

9. The butterfly valve exhaust gas recirculation valve of claim 8, wherein the housing defines a first receptacle and a second receptacle, the needle bearing being received in the first receptacle and the bushing being received in the second receptacle.

10. The butterfly valve exhaust gas recirculation valve of claim 9, wherein the first receptacle is an interference fit with the needle bearing and the second receptacle is an interference fit with the bushing;

the needle roller bearing is in clearance fit with the rotating shaft, and the bushing is in clearance fit with the rotating shaft.