Component mounting structure

Abstract

Provided is a component mounting structure capable of ensuring functionality and achieving miniaturization even if a motor holding structure is simplified. A holding plate (40) presses two orthogonal extension portions (46, 47), the thickness of the axial direction of the range in which the connection portion (34) is provided with the abutting surface (42) is formed to be thicker than the thickness of the axial direction of the orthogonal extension portions (46, 47) when viewed from the axial direction, if the range in the range in which the abutting surface (42) is provided, on the opposite side of the extension side of the connection portion (34) from the orthogonal extension portions (46, 47) and having the largest width in the direction orthogonal to the extension direction of the connection portion (34) is set as a counter connection range, the large diameter portion (33) is provided with a tipping reinforcement portion (48) that continuously extends at least from the component main body portion (11) to the counter connection range, and the thickness of the axial direction of the tipping reinforcement portion (48) is thicker than the thickness of the axial direction of the orthogonal extension portions (46, 47).

Description

Technical Field

[0001] The present invention relates to an improvement in a component mounting structure for mounting components on a throttle body having an opening for mounting the components. Background Technology

[0002] Previously, a component mounting structure was known, comprising: a throttle body having an opening to be assembled; an elastic sealing member clamped between the throttle body and a component fitted into the opening; a retaining plate pressing its outer end face to retain the component; and a fixing member fixing the retaining plate to the throttle body (for example, see Patent Document 1).

[0003] The component mounting structure shown in Patent Document 1 includes: a throttle body having a mounting hole; an elastic sealing member sandwiched between the throttle body and a component fitted into the mounting hole; a retaining plate pressing against the outer end face of the component; and a plurality of fixing members fixing the retaining plate to the throttle body via a plurality of fixing portions. The elastic sealing member is arranged such that it is axially compressed between the throttle body and the component. On the other hand, an elastic deformation portion is provided on the retaining plate between the pressing portion and the fixing portion relative to the component, causing the fixing force of the fixing member on the fixing portion to be distributed to the pressing portion via the elastic deformation portion. Specifically, an electric motor (component body) mounted on the throttle body is held by the retaining plate, which is fixed to the throttle body by a plurality of threads (fixing members).

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2007-092576 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, in the structure of Patent Document 1, in order to keep the electric motor from tilting relative to the throttle body, the retaining plate needs to apply a load evenly to the flange (large diameter portion) extending outward from the center of the rotating shaft of the electric motor. In addition, it is also necessary to overcome the force applied to the coupler of the electric motor, especially the force acting in the direction that moves the coupler away from the throttle body. Therefore, the retaining plate needs to be fixed to the throttle body by multiple threads, which hinders the simplification of the component installation structure.

[0009] In view of the above points, the objective of the present invention is to provide a component mounting structure that can ensure functionality and achieve miniaturization even while simplifying the motor holding structure.

[0010] Methods for solving problems

[0011] A component mounting structure includes: a throttle body having an internal space; a component fixed to the throttle body while sealing an opening of the internal space to the outside of the throttle body; an elastic sealing member clamped between the component and the throttle body; a retaining plate pressing a large-diameter portion in an axial direction of a cylindrical shape, the large-diameter portion being a portion extending radially outward from the outer periphery of the cylindrical shape of the component's internal structure, i.e., the component body portion; and a fixing member fixing the fixing portion to the throttle body, the fixing portion being the portion for fixing the retaining plate to the throttle body; further comprising: a connecting portion formed as part of the large-diameter portion and protruding radially outward from the component body portion for connection with other components, characterized in that, when viewed from the axial direction, the large-diameter portion extends radially outward more than the elastic sealing member, and has a [missing information - likely a component name or feature] on the throttle body side. On the contact surface that abuts against the throttle body in the axial direction, the retaining plate presses against two orthogonal extensions. The two orthogonal extensions are portions that extend in a direction orthogonal to the direction of extension of the connecting portion of the large-diameter portion and are disposed within the area where the contact surface is disposed. When viewed from the axial direction, the axial thickness of the area of ​​the connecting portion where the contact surface is disposed is formed to be thicker than the axial thickness of the orthogonal extensions. When viewed from the axial direction, if the area in the area where the contact surface is disposed, which is opposite to the extension side of the orthogonal extensions near the connecting portion and has the maximum width in the direction orthogonal to the extension direction of the connecting portion, is defined as the reverse connection range, then the large-diameter portion has a tilting reinforcement that extends continuously from the main body of the component to the reverse connection range, and the axial thickness of the tilting reinforcement is thicker than the axial thickness of the orthogonal extensions.

[0012] According to the present invention, by making the portion of the large-diameter section away from the part pressed by the retaining plate thick, when a force is applied that moves the connecting portion away from the throttle body, the tilting reinforcement bears the load; when a force is applied that moves the connecting portion closer to the throttle body, the connecting portion itself bears the load, thus preventing the main body of the component from tilting. This provides a component mounting structure that ensures functionality and achieves miniaturization even when the retaining structure of the main body (motor) is simplified.

[0013] In this invention, when viewed from the axial direction, an enlarged extension is provided within the anti-connection range, and the enlarged extension is positioned further away from the farthest part of the cylindrical shape of the component body than the orthogonal extension.

[0014] According to the present invention, by providing an enlarged extension at a location farther from the main body of the component, the main body of the component can be properly supported when a force is applied that moves the connecting portion away from the throttle body.

[0015] In this invention, when viewed from the axial direction, the fixed portion is the area of ​​the retaining plate that abuts against the throttle body; when viewed from the axial direction, both the fixed portion and the fixed member are disposed in a range opposite to the extension side of the connecting portion of the component body; when viewed from the axial direction, the retaining plate has an overlapping range that overlaps with the reverse connection range, and an association release portion with a cut from the center side of the cylindrical shape toward the fixed portion is provided in the overlapping range; when viewed from the axial direction, the tilting reinforcement is disposed within the range of the association release portion, and an imaginary rotating body formed by rotating the tilting reinforcement about the central axis of the cylindrical shape includes the association release portion.

[0016] According to the present invention, if one of the two pressing surfaces of the retaining plate is designated as the first pressing surface and the other as the second pressing surface, and the portion of the retaining plate from the fixing member to the first pressing surface is designated as the first arm portion, and the portion of the retaining plate from the fixing member to the second pressing surface is designated as the second arm portion, then by providing the linkage release portion, the mutual influence between the first arm portion and the second arm portion can be reduced. For example, when the load applied to the first pressing surface is greater than the load applied to the second pressing surface, the first arm portion will deform in a direction away from the throttle body than the second arm portion. However, by providing the linkage release portion, the deformation of the second arm portion in a direction away from the throttle body can be prevented, and the reduction in the load applied to the second pressing surface can be reduced. Moreover, the linkage release portion, in cooperation with the tilting reinforcement portion, can also perform the positioning function of the rotation direction of the retaining plate and the component.

[0017] Invention Effects

[0018] According to the present invention, a component mounting structure can be provided that ensures functionality and achieves miniaturization even while simplifying the motor holding structure. Attached Figure Description

[0019] Figure 1 (A) is a perspective view of an intake control device according to an embodiment of the present invention. Figure 1 (B) is a perspective view of the connection part, motor (motor unit) and bypass valve. Figure 1 (C) is a perspective view of the main part of the intake control device with the connection removed.

[0020] Figure 2 (A) is a three-dimensional sectional view of the intake control device. Figure 2 (B) is a cross-sectional view of the main part of the intake control device.

[0021] Figure 3 (A) is a cross-sectional view of the main part of the bypass passage. Figure 3(B) is an explanatory diagram of the measuring port. Figure 3 (C) is a cross-sectional view of the valve orifice and the bypass valve.

[0022] Figure 4 (A) is an explanatory diagram of the periphery of the component viewed from the axial direction in the state of having a retaining plate. Figure 4 (B) is an explanatory diagram of the periphery of the component viewed from the axial direction without the retaining plate. Figure 4 (C) is a perspective view of the periphery of the component without a retaining plate.

[0023] Figure 5 (A) is a side view of the periphery of the component in the state of having a retaining plate. Figure 5 (B) is a cross-sectional view of the main part around the component in the state of having a retaining plate. Detailed Implementation

[0024] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0025] like Figures 1-5 As shown, the intake control device 1 of the embodiment includes: a throttle body 3, which has an intake passage 2 inside; a valve core (butterfly valve) 4, which is disposed inside the intake passage 2 and adjusts the amount of intake air flowing in the intake passage 2 by adjusting the cross-sectional area of ​​the intake passage 2; and a valve shaft (not shown), on which the valve core 4 is fixed and supported by the throttle body 3 so as to be rotatable.

[0026] A bypass passage 5 connects the intake passage 2 at a position upstream of the valve core 4 and a position downstream of the valve core 4. The bypass passage 5 includes: an upstream passage 6, which forms part of the bypass passage 5 and connects to the position of the intake passage 2 upstream of the valve core 4; a downstream passage 7, which forms part of the bypass passage 5 and connects to the position of the intake passage 2 downstream of the valve core 4; and a valve port 8, which forms part of the bypass passage 5 as a space connecting the upstream passage 6 and the downstream passage 7.

[0027] A bypass valve 10 is disposed in the valve orifice 8 to adjust the amount of intake air flowing in the bypass passage 5 by adjusting the cross-sectional area of ​​the bypass passage 5.

[0028] In addition, the intake control device 1 includes: a motor 11 that generates a force to actuate the bypass valve 10; and a slider 12 that is independently configured with respect to the bypass valve 10 and engages with the bypass valve 10 to transmit the force generated by the motor 11 to the bypass valve 10, causing the bypass valve 10 to actuate in the direction extending along the valve port 8.

[0029] A cylindrical internal space 31 for mounting a motor 11 is formed within the throttle body 3, and an annular opening 32 with a diameter larger than the diameter of the internal space 31 is formed at the end of the internal space 31. The motor 11 is included in a motor unit 35 having a large-diameter resin portion 33 surrounding the motor 11 and a connection portion 34 for connecting wiring.

[0030] A sealing plate 36 is provided between the front end of the motor 11 and the bottom of the internal space for sealing. An elastic sealing member (O-ring) 37 is provided at the opening 32, thereby sealing the connection between the O-ring and the large-diameter portion 33 of the motor unit 35. A spring 38 is provided on the motor unit 35 to apply force to the sliding member 12 to the other side. The motor unit 35 is fixed to the throttle body 3 via a retaining plate 40 using a fixing member (thread) 41. The large-diameter portion 33 includes: an abutment surface 42 that abuts against the throttle body 3; and an enlarged extension 43 for a portion of the abutment surface 42 to extend.

[0031] A sensor unit 44 with a built-in intake pressure sensor, opening sensor and intake temperature sensor is provided on the throttle body 3.

[0032] The slider 12 has a first threaded portion 13 extending in the extending direction of the valve hole 8. The motor 11 has a second threaded portion 14 extending in the extending direction of the valve hole 8 as a rotary output shaft 15. The rotary output shaft 15 is rotated by engaging the first threaded portion 13 with the second threaded portion 14, thereby causing the slider 12 to move in the extending direction of the valve hole 8.

[0033] An anti-rotation member 16 is provided on the bypass valve 10 to prevent it from rotating about the rotation axis of the motor 11 relative to the throttle body 3, and a valve-side engagement portion (rotation limiting portion) 17 is provided to engage with the sliding member 12 to limit the mutual rotation of the bypass valve 10 and the sliding member 12 about the rotation axis of the motor 11. The sliding member 12 is provided with a sliding member-side engagement portion (rotation limiting portion) 18 that engages with the valve-side engagement portion 17.

[0034] The bypass valve 10 and the metering port 20 that opens to the valve hole 8 through the downstream passage 7 are located on the side of the valve hole 8 that opens to the valve hole 8 through the upstream passage 6 within the valve hole 8, in the direction of extension of the valve hole 8.

[0035] The bypass valve 10 has at least a gate portion 22 located on the other side of the partition portion 21. The gate portion 22 adjusts the cross-sectional area of ​​the bypass passage 5 by blocking the partition portion 21 and the metering port 20, which are divided into one side and the opposite side of the valve orifice 8.

[0036] In addition, the valve-side engaging portion 17 extends integrally to one side from the partition wall portion 21. Viewed from the direction extending from the valve hole 8, an extended bottom 23 is formed on the partition wall portion 21 within the area where the valve-side engaging portion 17 is disposed, which is a recessed portion that is recessed to one side on the other side of the partition wall portion 21.

[0037] Furthermore, viewed from the extending direction of the valve orifice 8, the extending bottom 23 extends radially outward from the center C of the rotating output shaft 15 in the direction of the gate portion 22. On the other side (forward side) of the gate portion 22 of the bypass valve 10, a slit-shaped valve opening (slit orifice) 24 is formed that gradually expands from one side to the other (from the backward side to the forward side), the valve opening 24 extends to the end of the bypass valve 10 and opens to the other side (forward side).

[0038] Next, the component mounting structure will be described in detail. The component mounting structure includes: a throttle body 3 having an internal space 31; a motor unit (hereinafter referred to as a component) 35, which is fixed to the throttle body 3 while sealing the opening 32 of the internal space 31 to the outside of the throttle body 3; an elastic sealing member 37, which is clamped between the component 35 and the throttle body 3; a retaining plate 40, which presses a large-diameter portion 33 in the axial direction of a cylindrical shape, the large-diameter portion 33 being a portion that extends radially outward from the outer periphery of the cylindrical shape of the internal structure of the component 35, namely the motor (hereinafter referred to as the component body portion) 11; and a fixing member 41, which fixes the fixing portion 45 to the throttle body 3, the fixing portion 45 being the portion that fixes the retaining plate to the throttle body 3.

[0039] In addition, the component mounting structure includes a connecting portion 34, which is formed as part of the large-diameter portion 33 and protrudes radially outward from the component body portion 11 to connect with other components.

[0040] When viewed from the axial direction, the large-diameter portion 33 has an abutment surface 42 on the throttle body 3 side that extends radially outward from the elastic sealing member 37 and abuts against the throttle body 3 in the axial direction.

[0041] The retaining plate 40 is a portion that extends in a direction orthogonal to the direction of the connecting portion 34 of the large diameter portion 33, and presses down on the two orthogonal extension portions 46 and 47 disposed within the area where the abutment surface 42 is disposed.

[0042] When viewed from the axial direction, the axial thickness of the area of ​​the connecting portion 34 where the abutment surface 42 is disposed is formed to be thicker than the axial thickness of the orthogonal extensions 46 and 47.

[0043] When viewed axially, if the portion of the area where the abutment surface 42 is located, which is opposite to the extension side of the connecting portion 34 compared to the orthogonal extensions 46 and 47, and has the largest size in the direction orthogonal to the extension direction of the connecting portion 34, is defined as the reverse connection range S1, then the large-diameter portion 33 has a tilting reinforcement portion 48 that extends continuously from the portion of the component body portion 11 adjacent to the fixing member 41 towards the fixing member 41 to at least the inner side of the reverse connection range S1. The axial thickness of this tilting reinforcement portion 48 is thicker than the axial thickness of the orthogonal extensions 46 and 47.

[0044] In addition, when viewed from the axial direction, an enlarged extension 43 is provided within the anti-connection range S1. This enlarged extension 43 is positioned further away from the center of the cylindrical shape of the component body 11 than the orthogonal extensions 46 and 47.

[0045] In addition, in the component mounting structure, when viewed from the axial direction, the fixed part 45 is the area where the retaining plate 40 abuts against the throttle body 3. When viewed from the axial direction, both the fixed part 45 and the fixed member 41 are located on the opposite side from the extension side of the connecting part 34 of the main body part 11.

[0046] When viewed axially, the retaining plate 40 has an overlap range that overlaps with the reverse connection range S1. Within the overlap range, a release portion 51, with a cut extending from the center side of the cylindrical shape towards the fixing portion 45, is provided. When viewed axially, the tilting reinforcement 48 is positioned within the range of the release portion 51. An imaginary rotating body that allows the tilting reinforcement 48 to rotate about the central axis of the cylindrical shape includes the release portion 51.

[0047] The effects of the component mounting structure described above will now be explained. By making the portion of the large-diameter section 33 that is away from the part pressed by the retaining plate 40 thick, when a force is applied that moves the connecting portion 34 away from the throttle body 3, the tilting reinforcement 48 bears the load, and when a force is applied that moves the connecting portion 34 closer to the throttle body 3, the connecting portion itself bears the load. Therefore, tilting of the component body 11 can be prevented. A component mounting structure can be provided that ensures functionality and achieves miniaturization even when the retaining structure of the component body (motor) 11 is simplified.

[0048] Furthermore, by providing an enlarged extension 43 at a location further away from the main body (motor) 11, the main body 11 can be properly supported when a force is applied that moves the connecting part 34 away from the throttle body 3.

[0049] Furthermore, if one of the two pressing surfaces 52 and 53 of the retaining plate 40 is designated as the first pressing surface 52 and the other as the second pressing surface 53, and the portion of the retaining plate 40 from the fixing member 41 to the first pressing surface 52 is designated as the first arm portion 54, and the portion of the retaining plate 40 from the fixing member 41 to the second pressing surface 53 is designated as the second arm portion 55, then by providing the linkage release part 51, the mutual influence between the first arm portion 54 and the second arm portion 55 can be reduced. For example, when the load applied to the first pressing surface 52 is greater than the load applied to the second pressing surface 53, the first arm portion 54 will deform in a direction away from the throttle body 3 than the second arm portion 55. However, by providing the linkage release part 51, the deformation of the second arm portion 55 in a direction away from the throttle body 3 can be prevented, and the reduction in the load applied to the second pressing surface 53 can be reduced. Moreover, the linkage release part 51, in cooperation with the tilting reinforcement part 48, can also perform the positioning function of the rotation direction of the retaining plate 40 and the component 35.

[0050] Furthermore, while embodiments of the present invention have been described, the present invention is not limited thereto. For example, the main body 11 of the component is a motor, but it is not limited thereto, and can also be applied to a substrate connected to the connecting part, etc. That is, as long as the functions and effects of the present invention are achieved, the present invention is not limited to the embodiments.

[0051] Industrial utilization potential

[0052] The component mounting structure of the present invention is applicable to air intake control devices.

[0053] Symbol Explanation

[0054] 1: Intake control device; 3: Throttle body; 11: Main body of component (motor); 31: Internal space; 32: Opening; 33: Large diameter part; 34: Connecting part; 35: Component (motor unit); 37: Elastic sealing member (O-ring); 40: Retaining plate; 41: Fixing member (bolt, thread); 42: Abutting surface; 43: Enlarged extension; 45: Fixing part; 46: First orthogonal extension; 47: Second orthogonal extension; 48: Tilting reinforcement; 51: Link release part; 52: First pressing surface; 53: Second pressing surface; 54: First arm; 55: Second arm.

Claims

1. A component mounting structure comprising: a throttle body having an internal space; a motor unit as a component, fixed to the throttle body while sealing an opening of the internal space to the outside of the throttle body; an elastic sealing member clamped between the motor unit and the throttle body; a retaining plate pressing an axially inclined large-diameter portion of a cylindrical shape, the large-diameter portion being a portion extending radially outward from the inner periphery of the cylindrical shape of the motor unit's internal structure; and a fixing member fixing a fixing portion to the throttle body, the fixing portion being the portion that fixes the retaining plate to the throttle body. The motor drives the bypass valve that adjusts the intake air volume in the bypass passage of the throttle body. It also includes: a connecting portion, which is formed as part of the large-diameter portion and protrudes radially outward from the motor to connect with other components, characterized in that, When viewed from the axial direction, the larger diameter portion extends radially outward compared to the resilient sealing member, and has an abutment surface on the throttle body side that abuts against the throttle body in the axial direction. The retaining plate presses down on two orthogonal extensions, which are portions extending in a direction orthogonal to the direction of extension of the connecting portion of the large-diameter portion, and are disposed within the area where the abutment surface is disposed. When viewed from the axial direction, the axial thickness of the area of ​​the connecting portion where the abutment surface is disposed is formed to be thicker than the axial thickness of the orthogonal extensions. When viewed from the axial direction, if the portion of the range where the abutment surface is located, that is opposite to the extension side of the connecting portion that is closer to the orthogonal extension portion, and that has the largest size in the direction orthogonal to the extension direction of the connecting portion, is defined as the reverse connection range, then the large-diameter portion has a tilting reinforcement portion that extends continuously from the motor to the fixing member at least to the inside of the reverse connection range. The axial thickness of the tilting reinforcement is greater than the axial thickness of the orthogonal extension.

2. The component mounting structure according to claim 1, characterized in that, When viewed from the axial direction, an enlarged extension is provided within the anti-connection range, which is positioned further away from the center of the cylindrical shape of the motor than the orthogonal extension.

3. The component mounting structure according to claim 1 or 2, characterized in that, When viewed from the axial direction, the fixed portion is the area where the retaining plate abuts against the throttle body. When viewed from the axial direction, both the fixed portion and the fixed member are positioned on the opposite side from the extension side of the motor relative to the connection portion. When viewed from the axial direction, the retaining plate has an overlap range that overlaps with the anti-connection range. Within the overlapping area, a release part is provided with a cut extending from the center side of the cylindrical shape toward the fixed part. When viewed from the axial direction, the tilting reinforcement is positioned within the range of the linkage release portion. The imaginary rotating body formed by rotating the tilting reinforcement about the central axis of the cylindrical shape includes the associated release part.

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