Vacuum steady-flow type butterfly valve for automobile

Abstract

The utility model belongs to the field of engines, and provides a vacuum steady-flow butterfly valve for an automobile, which comprises a valve seat, a valve rod, a valve body, a transmission rod, a flow limiting plate and a rotating plate. Wherein the valve seat forms a vacuum cavity; the valve rod is movably arranged on the valve seat and can move relative to the valve seat along with the pressure change of the vacuum cavity; the valve body and the valve seat are arranged at an interval and form a waste gas channel for supplying gas to a target engine; the transmission rod is rotationally installed on the valve body and partially extends into the waste gas channel, and the rotating center axis of the transmission rod is perpendicular to the moving direction of the valve rod. The flow limiting plate is arranged in the waste gas channel and is riveted on the transmission rod, and the flow limiting plate further forms a shape matched with the waste gas channel and can be driven by the transmission rod to adjust the opening degree of the waste gas channel; the rotating plate is hinged to the end, away from the valve seat, of the valve rod, the rotating plate is parallel to a rotating center shaft of the transmission rod, and the rotating plate is riveted to the transmission rod.

Description

Technical Field

[0001] This application belongs to the field of engines, and in particular relates to a vacuum flow-stabilizing butterfly valve for automobiles. Background Technology

[0002] EGR vacuum-controlled butterfly valves are primarily used to control and regulate the amount of exhaust gas recirculated from the exhaust system to the intake system, while providing stable exhaust gas flow control to maintain engine performance. Their rapid response capability ensures precise adjustment of the exhaust gas recirculation volume according to instructions from the engine management system. In traditional vacuum-controlled butterfly valves, the flow restrictor used to control the exhaust gas flow is typically connected to a transmission rod, which in turn affects the pressure changes in the vacuum chamber, thus achieving precise flow regulation. However, the transmission rod often deforms during its connection to the flow restrictor, resulting in generally low structural stability in existing vacuum-controlled butterfly valves. Therefore, it is necessary to address these technical issues. Utility Model Content

[0003] The purpose of this application is to provide a vacuum flow-stabilizing butterfly valve for automobiles, so as to solve the technical problem of poor structural stability of vacuum flow-stabilizing butterfly valves in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a vacuum flow-regulating butterfly valve for automobiles, comprising:

[0005] The valve seat forms a vacuum chamber;

[0006] The valve stem is movably mounted on the valve seat and can move relative to the valve seat in response to pressure changes in the vacuum chamber.

[0007] The valve body is spaced apart from the valve seat and forms an exhaust gas passage for supplying air to the target engine;

[0008] A transmission rod is rotatably mounted on the valve body and partially extends into the exhaust gas passage, with the rotation center axis of the transmission rod perpendicular to the movement direction of the valve rod;

[0009] A flow restrictor is disposed in the exhaust gas passage and riveted to the transmission rod. The flow restrictor is also formed to fit the shape of the exhaust gas passage and can be driven by the transmission rod to adjust the opening of the exhaust gas passage.

[0010] A rotating plate is hinged to the end of the valve stem away from the valve seat, and the rotation center axes of the rotating plate and the transmission rod are parallel to each other. The rotating plate is pressed and riveted onto the transmission rod.

[0011] Optionally, the transmission rod is provided with mounting holes for riveting the flow-limiting plate.

[0012] Optionally, the automotive vacuum flow-regulating butterfly valve further includes bearings spaced and mounted on the transmission rod;

[0013] The transmission rod is rotatably mounted on the valve body via the bearing.

[0014] Optionally, the automotive vacuum flow-regulating butterfly valve also includes a mounting plate;

[0015] The fixing plate includes a first plate surface and a second plate surface that are vertically connected. The first plate surface is flat against the valve seat, and the second plate surface is flat against the valve body. The valve seat is connected to the valve body through the fixing plate.

[0016] Optionally, the valve stem penetrates vertically through the first plate surface, the transmission rod penetrates vertically through the second plate surface, and the rotating plate is disposed in the concave space formed by the first plate surface and the second plate surface.

[0017] Optionally, the fixing plate further includes an arcuate portion connecting the first plate surface and the second plate surface;

[0018] The arc-shaped portion is arc-shaped, and both the first plate surface and the second plate surface are parallel to the axial direction of the arc-shaped portion.

[0019] Optionally, the automotive vacuum flow-regulating butterfly valve further includes a gasket coaxially mounted on the transmission rod;

[0020] The gasket is placed between the flow restrictor and the valve body and is slidably connected to the flow restrictor.

[0021] The beneficial effects of the automotive vacuum flow-regulating butterfly valve provided in this application are as follows: Compared with the prior art, in the automotive vacuum flow-regulating butterfly valve provided in this application, the transmission rod rotatably mounted on the valve body is connected to the valve stem movably mounted on the valve seat and the flow-limiting plate disposed in the exhaust gas passage. Since the rotation center axis of the transmission rod is perpendicular to the movement direction of the valve stem and parallel to the rotation center axis of the rotating plate, when the valve stem moves in response to the change in vacuum chamber pressure, it can drive the transmission rod and the flow-limiting plate connected to the transmission rod to rotate, thereby achieving a precise adjustment effect of the exhaust gas passage opening. Furthermore, since the flow-limiting plate and the rotating plate used to connect the transmission rod and the valve stem are directly riveted to the transmission rod, structural deformation of the transmission rod during the connection with the flow-limiting plate can be effectively avoided. Therefore, the automotive vacuum flow-regulating butterfly valve provided in this application can form a high structural stability, which is far superior to the prior art. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of the overall structure of the automotive vacuum flow-stabilizing butterfly valve in the embodiments of this application;

[0024] Figure 2 This is a partial structural cross-sectional view of the automotive vacuum flow-stabilizing butterfly valve in an embodiment of this application.

[0025] The reference numerals in the figures are as follows: 101, valve seat; 102, vacuum chamber; 103, valve stem; 104, valve body; 105, exhaust gas passage; 106, transmission rod; 107, flow limiting plate; 108, rotating plate; 109, mounting hole; 110, bearing; 111, fixing plate; 112, first plate surface; 113, second plate surface; 114, arc-shaped part; 115, gasket; 116, spring; 117, diaphragm; 118, spring seat; 119, support plate; 120, through hole; 121, negative pressure interface; 122, through cavity. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Please refer to the following: Figure 1 and Figure 2 This application describes a vacuum-controlled flow-regulating butterfly valve for automobiles. The valve includes a valve seat 101, a valve stem 103, a valve body 104, a transmission rod 106, a flow-limiting plate 107, and a rotating plate 108. Wherein:

[0031] Valve seat 101 forms a vacuum chamber 102; valve stem 103 is movably mounted on valve seat 101 and can move relative to valve seat 101 following pressure changes in vacuum chamber 102; valve body 104 is spaced apart from valve seat 101 and forms an exhaust gas passage 105 for supplying gas to the target engine; transmission rod 106 is rotatably mounted on valve body 104 and partially extends into exhaust gas passage 105, the rotation axis of transmission rod 106 is perpendicular to the movement direction of valve stem 103; flow restrictor 107 is disposed in exhaust gas passage 105 and riveted to transmission rod 106, flow restrictor 107 is also shaped to fit exhaust gas passage 105 and can be driven by transmission rod 106 to adjust the opening of exhaust gas passage 105; rotating plate 108 is hinged to the end of valve stem 103 away from valve seat 101 and the rotation axes of rotating plate 108 and transmission rod 106 are parallel to each other, rotating plate 108 is riveted to transmission rod 106.

[0032] According to the structure provided in this embodiment, in the automotive vacuum flow-stabilizing butterfly valve provided in this embodiment, the transmission rod 106 rotatably mounted on the valve body 104 is connected to the valve stem 103 movably mounted on the valve seat 101 and the flow-limiting plate 107 disposed in the exhaust gas passage 105. Since the rotation center axis of the transmission rod 106 is perpendicular to the movement direction of the valve stem 103 and parallel to the rotation center axis of the rotating plate 108, when the valve stem 103 moves in response to the pressure change of the vacuum chamber 102, it can drive the transmission rod 106 and the flow-limiting plate 107 connected to the transmission rod 106 to rotate, thereby achieving a precise adjustment effect on the opening of the exhaust gas passage 105. Furthermore, since the flow-limiting plate 107 and the rotating plate 108 used to connect the transmission rod 106 and the valve stem 103 are both directly riveted to the transmission rod 106, this can effectively prevent the transmission rod 106 from undergoing structural deformation during the connection with the flow-limiting plate 107. Therefore, the automotive vacuum flow-stabilizing butterfly valve provided in this embodiment can achieve high structural stability, which is far superior to the prior art.

[0033] Here, the principle by which the valve stem 103 moves in response to pressure changes in the vacuum chamber 102 is as follows: the valve seat 101 is a hollow cavity structure, and a diaphragm 117 is installed inside to divide the cavity into a vacuum chamber 102 and a conducting chamber 122. The vacuum chamber 102 is connected to the negative pressure interface 121, and the conducting chamber 122 is connected to the atmosphere through a conducting hole 120 provided on the valve seat 101. A spring seat 118 and a support plate 119 are respectively riveted to the side of the diaphragm 117 located in the vacuum chamber 102 and the side located in the conducting chamber 122. A spring 116 is mounted on the upper part so that the diaphragm 117 always tends to move towards the guide cavity 122. The valve stem 103 is connected to the support plate 119. The connection method can be riveting, welding or other methods. When in use, the negative pressure port 121 is connected to the engine intake end. The vacuum suction force generated by the engine overcomes the elastic force of the spring 116 and causes the valve stem 103 to move with the displacement of the diaphragm 117, thereby driving the transmission rod 106 and the flow limiting plate 107 connected to the transmission rod 106 to rotate, so as to realize the automatic adaptation and linkage between the opening degree of the flow limiting plate 107 and the engine.

[0034] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 and Figure 2 The transmission rod 106 has a pre-set mounting hole 109 for riveting the flow limiting plate 107. According to the structure provided in this embodiment, the transmission rod 106 with the pre-set mounting hole 109 can bear less pressure when riveting with the flow limiting plate 107, which makes the transmission rod 106 less prone to structural deformation, and thus also helps to further improve the structural stability of the automotive vacuum flow-stabilizing butterfly valve in this embodiment.

[0035] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 and Figure 2 The automotive vacuum flow-regulating butterfly valve also includes bearings 110 spaced and fitted onto the transmission rod 106; the transmission rod 106 is rotatably mounted on the valve body 104 via the bearings 110. According to the structure provided in this embodiment, the bearings 110 fitted onto the transmission rod 106 can provide stable support for the transmission rod 106, thus making the transmission rod 106 less prone to structural deformation during operation, thereby further improving the structural stability of the automotive vacuum flow-regulating butterfly valve in this embodiment.

[0036] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 and Figure 2The automotive vacuum flow-regulating butterfly valve also includes a fixing plate 111. The fixing plate 111 includes a first plate surface 112 and a second plate surface 113 that are vertically connected. The first plate surface 112 is flat against the valve seat 101, and the second plate surface 113 is flat against the valve body 104. The valve seat 101 is connected to the valve body 104 through the fixing plate 111. According to the structure provided in this embodiment, the fixing plate 111, through the first plate surface 112 flat against the valve seat 101 and the second plate surface 113 flat against the valve body 104, can form a stable connection and a stable relative position relationship between the valve body 104 and the valve seat 101. In this way, the transmission rod 106 can maintain better structural stability during operation by bearing less load, which is also conducive to further improving the structural stability of the automotive vacuum flow-regulating butterfly valve in this embodiment.

[0037] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 and Figure 2 The valve stem 103 vertically penetrates the first plate surface 112, and the transmission rod 106 vertically penetrates the second plate surface 113. The rotating plate 108 is disposed in the recessed space formed by the first plate surface 112 and the second plate surface 113. According to the structure provided in this embodiment, the first plate surface 112 penetrated by the valve stem 103 can provide stable support for the valve stem 103, and the second plate surface 113 penetrated by the transmission rod 106 can provide stable support for the transmission rod 106. In this way, a stable connection relationship can be formed between the valve stem 103 and the transmission rod 106, which is also conducive to further improving the structural stability of the automotive vacuum flow-stabilizing butterfly valve in this embodiment. In addition, since the recessed space formed by the first plate surface 112 and the second plate surface 113 can also provide a protective effect for the rotating plate 108, the automotive vacuum flow-stabilizing butterfly valve in this embodiment can achieve even greater structural stability.

[0038] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 and Figure 2 The fixing plate 111 also includes an arc-shaped portion 114 connecting the first plate surface 112 and the second plate surface 113; the arc-shaped portion 114 is arc-shaped and both the first plate surface 112 and the second plate surface 113 are parallel to the axial direction of the arc-shaped portion 114. According to the structure provided in this embodiment, the arc-shaped portion 114 formed between the first plate surface 112 and the second plate surface 113 can effectively improve the structural strength of the fixing plate 111, which is also conducive to further improving the structural stability of the automotive vacuum flow-stabilizing butterfly valve in this embodiment.

[0039] In another embodiment of this application, please refer to [the relevant document / reference]. Figure 1 and Figure 2The automotive vacuum flow-regulating butterfly valve also includes a gasket 115 coaxially mounted on the transmission rod 106; the gasket 115 is positioned between the flow-limiting plate 107 and the valve body 104 and is slidably connected to the flow-limiting plate 107. According to the structure provided in this embodiment, the gasket 115, positioned between the flow-limiting plate 107 and the valve body 104 and slidably connected to the flow-limiting plate 107, not only allows the flow-limiting plate 107 to rotate smoothly, but also restricts the axial movement of the transmission rod 106, thus significantly improving the structural stability of the automotive vacuum flow-regulating butterfly valve in this embodiment.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vacuum flow-stabilized butterfly valve for an automobile, characterized by comprising: The valve comprises: a valve seat (101) forming a vacuum cavity (102); a valve stem (103) movably arranged on the valve seat (101) and capable of moving relative to the valve seat (101) following the pressure change of the vacuum cavity (102); a valve body (104) spaced apart from the valve seat (101) and forming an exhaust passage (105) for supplying air to a target engine; a transmission rod (106) rotatably mounted on the valve body (104) and partially extending into the exhaust passage (105), the rotation center axis of the transmission rod (106) being perpendicular to the moving direction of the valve stem (103); a flow limiting plate (107) arranged in the exhaust passage (105) and riveted on the transmission rod (106), the flow limiting plate (107) also being shaped to fit the exhaust passage (105) and capable of being driven by the transmission rod (106) to adjust the opening of the exhaust passage (105); a rotating plate (108) hingedly connected to the end of the valve stem (103) away from the valve seat (101) and the rotation center axis of the transmission rod (106) being parallel to each other, the rotating plate (108) being riveted on the transmission rod (106).

2. The automobile vacuum flow-stabilized butterfly valve according to claim 1, wherein: a mounting hole (109) for riveting the flow limiting plate (107) is pre-set on the transmission rod (106).

3. The automobile vacuum flow-stabilized butterfly valve according to claim 1, wherein: the automobile vacuum flow-stabilized butterfly valve further comprises a bearing (110) sleeved on the transmission rod (106); the transmission rod (106) is rotatably mounted on the valve body (104) through the bearing (110).

4. The automobile vacuum flow-stabilized butterfly valve according to claim 1, wherein: the automobile vacuum flow-stabilized butterfly valve further comprises a fixing plate (111); the fixing plate (111) comprises a first plate surface (112) and a second plate surface (113) connected perpendicularly, the first plate surface (112) being flatly attached to the valve seat (101), the second plate surface (113) being flatly attached to the valve body (104), and the valve seat (101) being connected to the valve body (104) through the fixing plate (111).

5. The automobile vacuum flow-stabilized butterfly valve according to claim 4, wherein: the valve stem (103) vertically penetrates the first plate surface (112), the transmission rod (106) vertically penetrates the second plate surface (113), and the rotating plate (108) is arranged in the internal corner space formed by the first plate surface (112) and the second plate surface (113).

6. The automobile vacuum flow-stabilized butterfly valve according to claim 4, wherein: the fixing plate (111) further comprises an arc-shaped portion (114) connecting the first plate surface (112) and the second plate surface (113); the arc-shaped portion (114) is arc-shaped, and the first plate surface (112) and the second plate surface (113) are parallel to the axial direction of the arc-shaped portion (114).

7. The vacuum flashboard valve for automobile as claimed in claim 1, wherein: the vacuum flashboard valve for automobile further comprises a gasket (115) coaxially sleeved on the transmission rod (106); and the gasket (115) is arranged between the flow limiting plate (107) and the valve body (104) and is in sliding connection with the flow limiting plate (107).

8. The vacuum flashboard valve for automobile as claimed in claim 1, wherein: the flow limiting plate (107) is provided with a plurality of flow limiting holes (108) arranged in a row.

9. The vacuum flashboard valve for automobile as claimed in claim 1, wherein: the flow limiting plate (107) is provided with a plurality of flow limiting holes (108) arranged in a row.

10. The vacuum flashboard valve for automobile as claimed in claim 1, wherein: the flow limiting plate (107) is provided with a plurality of flow limiting holes (108) arranged in a row.

11. The vacuum flashboard valve for automobile as claimed in claim

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