JP2006046082A - Mounting structure of cover member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure capable of attaching a cover member smoothly even if deviation occurs in relative positional relation between supporting parts when the supporting parts for supporting the cover member are provided in both of an engine and an intake manifold. <P>SOLUTION: The supporting part 21 on an intake manifold side has a barlike member 212 extending in the direction L2 crossing the direction of a row of cylinders of the engine substantially orthogonally when viewed in a plan view. An engaging part 50 of the cover member 30 engaging with the supporting part 21 is provided on a lower face of the cover member 30 and is provided with a pair of claw members 52 having elasticity and nipping and holding the barlike member 212 in the direction crossing its longitudinal direction orthogonally. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an attachment structure for a cover member that covers an upper portion of an engine, and more particularly, to an attachment structure for a cover member that also covers an upper portion of an intake manifold where harnesses are complicated.

  In recent years, it has become widespread to cover the top of the engine with a cover member so as to improve the appearance of the engine room as well as the design of the vehicle. For example, a resin member is often used as the cover member in order to reduce the weight. Further, a cover member that covers not only the engine but also the upper side of an intake manifold provided on the side of the engine has been proposed (for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-210488

  In general, the cover member is mounted on the engine with a support portion. However, when the cover member is covered to the upper side of the intake manifold, it is desirable to provide a support portion on the intake manifold side in order to stably support the cover member. However, when the support portions are provided in both the engine and the intake manifold, the cover member and the support portion are likely to be displaced. In other words, the components of the engine and intake manifold are made with high precision in the necessary parts, but not necessarily in parts where dimensional precision is not required. not high. For this reason, due to accumulation of individual differences in various configurations existing between the support portions, the relative positional relationship between the support portions is not necessarily constant, and the cover member may not be smoothly attached.

  Accordingly, an object of the present invention is to provide a cover member that can be smoothly attached even when there is a deviation in the relative positional relationship between the support portions in providing a support portion that supports the cover member on both the engine and the intake manifold. It is to provide a structure that can.

  According to the present invention, there is provided a cover member mounting structure that is mounted from above an engine having an intake manifold provided on a side portion thereof and covers the upper side of the engine and the upper side of the intake manifold, and is provided in the engine. A first support portion that engages with the first engagement portion of the cover member and supports the cover member, and is provided on the intake manifold and engages with the second engagement portion of the cover member. A second support portion that supports the cover member, and the second support portion includes a rod-like member that extends in a direction substantially orthogonal to a cylinder row direction of the engine in a plan view. An attachment structure for a cover member, characterized in that an engagement portion is provided on the lower surface of the cover member and has a pair of claw members that have elasticity and sandwich the rod-like member in a direction perpendicular to the longitudinal direction thereof. Offer It is.

  In this attachment structure, the rod-shaped member of the second support portion is engaged by the pair of claw members sandwiched in a direction perpendicular to the longitudinal direction of the rod-shaped member. Since the rod-like member extends in a direction substantially orthogonal to the cylinder row direction of the engine in plan view, the engagement position between the pair of claw members and the rod-like member has a degree of freedom in the substantially orthogonal direction. . Therefore, even if the relative positional relationship between the first and second support portions, in particular, from the engine to the intake manifold is not constant, the cover member is smoothly attached, and the intake manifold is connected from the engine to the intake manifold. It is possible to cover harnesses and pipes that are complicated by the cover member.

  In the present invention, two sets of the first support member and the first engagement portion are provided apart from each other in the cylinder row direction of the engine, and these are provided with the second support member and the second engagement. It is desirable to support the cover member at three locations. With the three-point support, the cover member can be stably supported.

  Further, in the present invention, the intake manifold is made of a resin including a surge tank portion, and a branch pipe portion curved upward from the surge tank portion and connected to the intake port of the engine, The branch pipe part is formed by injection molding and a boss part to which the rod-like member is attached is integrally formed, and the boss part is formed to protrude in the same direction as the die cutting direction of the branch pipe part after injection molding. It is desirable. According to this configuration, it is possible to easily form the boss portion at the time of injection molding of the intake manifold, and in particular, by forming the mold for the boss portion on an existing mold, Can continue to be utilized.

  In the present invention, it is preferable that the branch pipe portion is integrally formed with a reinforcing rib that reinforces the boss portion against a load from above on the boss portion. According to this configuration, it is possible to improve the support stability of the cover member when the cover member is attached and after the cover member is attached.

  In the present invention, it is desirable to provide a sound insulating material on the lower surface of the cover member. According to this configuration, not only the design property by the cover member is improved, but also the engine noise can be reduced.

  As described above, according to the present invention, when providing the support portion for supporting the cover member on both the engine and the intake manifold, the cover member can be smoothly moved even if there is a deviation in the relative positional relationship between the support portions. Can be attached.

  FIG. 1 is a plan view of an engine 10 in which a cover member mounting structure according to an embodiment of the present invention is adopted, and FIG. 2 is a plan view of the engine 10 showing a mode in which a cover member 30 is mounted. In the present embodiment, the engine 10 is assumed to be an in-line four-cylinder engine, but it goes without saying that the present invention can be applied to engines having other numbers of cylinders or other cylinder types.

  In FIG. 1, C1 to C4 indicate the positions of the cylinders, and a line L1 indicates the cylinder row direction. Referring to FIG. 1, a support portion 11 (first support portion) that supports a cover member 30 is provided on the upper surface (specifically, a cylinder head cover) of the engine 10. One or a plurality of support portions 11 can be provided, but in the present embodiment, two support portions 11 are provided apart from each other in the cylinder row direction L1 of the engine 10. Details of the support portion 11 will be described later. An oil level gauge 12 is inserted on the upper surface of the engine 10, and the tip of the oil level gauge 12 extends to an oil pan (not shown), and the amount of oil is inspected by inserting and removing it.

  An intake manifold 20 is provided on a side portion of the engine 10 (in a direction substantially perpendicular to the cylinder row direction L1). A support portion 21 (second support portion) that supports the cover member 30 is provided above the intake manifold 20. The support portion 21 has a longitudinal direction (line L2) extending in a direction substantially orthogonal to the cylinder row direction L1 of the engine 10 in plan view. Details of the support portion 21 will be described later. In the case of this embodiment, the cover member 30 is supported at the three locations of the two support portions 11 and the support portion 21 described above. The cover member 30 can be stably supported by the three-point support.

  As shown in FIG. 1, a solenoid valve 22 that supplies negative pressure to a negative pressure actuator that operates an intake flow control valve and a variable intake valve (not shown) above the intake manifold 20 and between the engine 10 and the intake manifold 20. The harness 22a to the front, the harness 23 such as the harness 23 to the ignition plug (not shown) of each cylinder of the engine 10, or the piping such as the delivery pipe 24 are complicated. As shown in FIG. 2, such a harness is generally covered by the cover member 30 when the cover member 30 is attached, and the design is improved. The cover member 30 has a shape that covers the upper side of the engine 10 and the upper side of the intake manifold 20. In the present embodiment, the cover member 30 is assumed to be made of resin. A plurality of linear ribs 31 for increasing the strength of the cover member 30 are integrally provided on the surface. Further, a hole 32 is provided in an upper portion of the oil level gauge 12 so that the oil level gauge 12 can be inserted and removed while the cover member 30 is attached to the engine 10.

  Next, the mounting structure of the cover member 30 will be described in detail. FIG. 3A is a cross-sectional view (end view) of a main part along the line II in FIG. 2, and a support part 11 provided on the engine 10, an engagement part 40 provided on the lower surface of the cover member 30, The structure of is shown. In the present embodiment, two support portions 11 are provided, but the other support portion 11 also has an engagement portion 40 corresponding thereto, and the support portion 11 and the engagement portion 40 are 2 in number. A set is provided.

  The support portion 11 includes a boss portion 11 a formed on the upper surface of the engine 10. A hole is provided in the center of the boss portion 11a, and a lower portion 11b "of the pin member 11b is press-fitted therein. A male screw is formed on the upper portion 11b 'of the pin member 11b. The lower part of the coupling member 11c is screwed in. The engaging member 11c has a hollow shaft, and a female screw that engages with the upper part 11b 'of the pin member 11b is engraved on the inner periphery of the lower part. The member 11c is disposed in such a manner that the member 11c is erected from the boss portion 11a above the engine 10 via the pin member 11b. An engaging portion 11c ′ is formed, and the engaging portion 11c ′ includes a seat portion 11c ″ that protrudes greatly from the outer peripheral surface thereof.

  The engaging portion 40 includes a cylindrical attachment portion 41 that protrudes downward from the lower surface of the cover member 30 main body. Inside the attachment portion 41, a hollow elastic member 42 made of rubber or the like is attached. A slit 41 a is partially provided on the peripheral wall of the attachment portion 41, and the flange 42 a protruding from the outer peripheral surface of the elastic member 42 is fitted into the slit 41 a, so that the elastic member 42 is attached to the attachment portion 41. Installed inside. Further, the inner peripheral surface of the elastic member 42 is provided with a flange 42b that protrudes inward.

  Therefore, when the cover member 30 is attached to the engine 10, the engaging portion 40 of the cover member 30 is pushed into the support portion 11 of the engine 10 from above the engine 10, and the lower surface of the elastic member 42 is engaged with the engaging member 11c. The flange portion 42b of the elastic member 42 is fitted into the recess on the outer peripheral surface of the engagement portion 11c ′ of the engagement member 11c, and the engagement portion 40 and the support portion 11 are engaged with each other. When removing the cover member 30, when the cover member 10 is lifted above the engine 10, the engagement with the engagement member 11c is released by elastic deformation of the elastic member 42.

  As described above, in the present embodiment, the support portion 11 and the engagement portion 40 can be easily engaged and released, but other methods such as fastening means such as screws may be employed. .

  Next, FIG. 3B is a cross-sectional view (end view) of the main part taken along line II-II in FIG. 2, and is provided on the support portion 21 provided on the intake manifold 20 and the lower surface of the cover member 30. The structure with the engaging part 50 is shown. 4A is a sectional view (end view) along the line III-III in FIG. 3B, and FIG. 4B is a sectional view along the line IV-IV in FIG. 3B. It is a figure (end view).

  The support portion 21 includes a boss portion 211 formed on a component 20 a that constitutes a branch pipe portion of the intake manifold 20. In the present embodiment, it is assumed that the component 20a is a resin molded product by injection molding, and the boss portion 211 is formed integrally with the component 20a. Here, the boss portion 211 is desirably formed so as to protrude in the same direction as the die cutting direction of the component 20a after injection molding. In this way, the boss portion 211 can be easily formed at the time of injection molding of the component 20a, and in particular, the existing mold can be continuously utilized by forming a mold for the boss portion 211 in the existing mold. There is a manufacturing advantage of being able to. This point will be described in detail with reference to FIG.

  FIG. 5 is a cross-sectional view (end view) of the intake manifold 20 taken along line V-V in FIG. The intake manifold 20 includes a surge tank portion 20b and a branch pipe portion 20c that curves upward from the surge tank portion and is connected to an intake port (not shown) of the engine 10, and the component 20a includes a branch pipe portion 20c. It is a component. Thus, the boss portion 211 indicated by the phantom line is formed so as to protrude in the same direction as the die cutting direction of the component 20a if the longitudinal direction L2 is set in a direction substantially orthogonal to the mold splitting surface L3 of the component 20a. Will be.

  Next, referring to FIG. 3B and FIG. 4A, the component 20 a constituting the branch pipe portion 20 c is reinforced to reinforce the boss portion 211 against a load from above on the boss portion 211. The rib 211a is integrally formed. As shown in FIG. 4A, the reinforcing rib 211a is formed in a square shape at the lower portion of the boss portion 211, and connects the boss portion 211 and the other part of the component 20a. With this configuration, the reinforcing rib 211 a can be made to resist the load from above on the boss portion 211.

  Next, referring to FIG. 3B, a rod-like member 212 is attached to the boss portion 211. The rod-like member 212 includes a bolt 212a and a rubber member 212b that is concentric with the bolt 212a. A screw is engraved on the lower portion of the bolt 212a and is screwed into a hole drilled in the boss portion 211. When the boss portion 211 is made of resin as in the present embodiment, it is convenient for processing that the screw at the tip of the bolt 212a is a wood screw and no female screw is engraved in the hole of the boss portion 211.

  A screw is not engraved on the upper part of the bolt 212b, and a rubber member 212b is fitted therein. The rubber member 212b is interposed between the head of the bolt 212a and the upper surface of the boss 211. The longitudinal direction of the boss portion 211 and the rod-like member 212 extends in a direction L2 substantially orthogonal to the cylinder row direction L1 (FIG. 1) of the engine 10 in plan view. Further, in the present embodiment, as shown in FIG.

  The engaging portion 50 includes a block-shaped attachment portion 51 that protrudes obliquely downward from the lower surface of the cover member 30 main body. A sound insulating material 33 is provided on the lower surface of the cover member 30 so as to reduce the noise of the engine 10 and the intake manifold 20. By doing so, not only the design property by the cover member 30 can be improved, but also the engine noise can be reduced. As shown in FIG. 4B, a pair of claw members 52 are provided on the lower surface of the attachment portion 51. The pair of claw members 52 are connected to each other at the upper end and are open at the lower end, and are formed from an elastic member such as resin or spring steel. The claw member 52 is fixed to the attachment portion 51 with a screw 53.

  The screw 53 passes through the upper end connection portion of the claw member 52 and is screwed into a hole drilled in the lower surface of the attachment portion 51, thereby fixing the claw member 52 to the cover member 30. When the cover member 30 is made of resin as in the present embodiment, it is convenient for processing that the screw 53 is a wood screw and the female screw is not engraved in the hole of the attachment portion 51. As shown in FIG. 4B, the pair of claw members 52 has a substantially C-shaped cross section as a whole, and sandwiches the rod-like member 212 in a direction perpendicular to the longitudinal direction (L2 in FIG. 3B). The rod-shaped member 212 is engaged.

  Therefore, when the cover member 30 is attached to the intake manifold 20, the engaging portion 50 of the cover member 30 is pushed into the support portion 21 of the intake manifold 20 from above the intake manifold 20. The lower ends of the pair of claw members 52 are pressed against a part of the bar-shaped member 212, and the claw members 52 are elastically deformed so that the lower ends are opened. And the rod-shaped member 212 is inserted between a pair of nail | claw members 52, and the engaging part 50 and the support part 21 will engage. When the cover member 30 is mounted, a downward load is applied to the boss portion 211. However, by providing the reinforcing rib 211a, the boss portion 211 is durable, and the support stability of the cover member 30 can be improved. Further, even after the mounting, the reinforcing rib 211a reinforces the boss portion 211, so that the support stability of the cover member 30 can be improved. When removing the cover member 30, when the cover member 10 is lifted above the intake manifold 20, the pawl member 52 is elastically deformed so that the lower ends of the pair of claw members 52 are opened again, and the engagement with the rod-shaped member 212 is released. The

  Here, in the present embodiment, since the rod-shaped member 212 extends in a direction L2 substantially orthogonal to the cylinder row direction L1 of the engine 10 in plan view, the engagement position between the pair of claw members 52 and the rod-shaped member 212 is There is a degree of freedom in the substantially orthogonal direction L2. That is, the engagement position is arbitrary in a predetermined range in the direction of the line L2 shown in FIG. Therefore, even if the relative positional relationship between the support portion 11 and the support portion 21, that is, from the engine 10 to the intake manifold 20 is not constant, the cover member 30 is smoothly attached, and the engine 10 is connected to the intake manifold 20. The cover members 30 can cover the harnesses (22a, 23) and the pipe (24) that are complicated.

  Further, the mounting of the cover member 30 is completed by pressing the cover member 30 against the engine 10 and the intake manifold 20 from above, so that the mounting operation is extremely simple. Similarly, when removing the cover member 30, the cover member 30 can be removed by lifting the cover member 30 upward, so that the removal work is very simple.

1 is a plan view of an engine 10 that employs a cover member mounting structure according to an embodiment of the present invention. FIG. 2 is a plan view of the engine 10 showing a mode in which a cover member 30 is attached. (A) is principal part sectional drawing (end view) which follows the line II of FIG. 2, and is the structure of the support part 11 provided in the engine 10, and the engaging part 40 provided in the lower surface of the cover member 30. Indicates. 2B is a cross-sectional view (end view) of a main part taken along line II-II in FIG. 2, and a support portion 21 provided on the intake manifold 20 and an engagement portion 50 provided on the lower surface of the cover member 30. The structure of is shown. (A) is a fragmentary sectional view (end view) taken along line III-III in FIG. 3 (b), and (b) is a fragmentary sectional view (end view) taken along line IV-IV in FIG. 3 (b). is there. FIG. 5 is a cross-sectional view (end view) of the intake manifold 20 taken along line V-V in FIG. 1.

Explanation of symbols

10 Engine 11 Support part (first support part)
20 Intake manifold 21 support part (second support part)
30 cover member 40 engaging part (first engaging part)
50 engaging portion (second engaging portion)
52 Claw member 211 Boss portion 212 Bar-shaped member

Claims (5)

A cover member mounting structure that is mounted from above an engine provided with an intake manifold on a side portion and covers the upper side of the engine and the upper side of the intake manifold,
A first support that is provided in the engine and engages with a first engagement portion of the cover member and supports the cover member;
A second support portion that is provided in the intake manifold and engages with a second engagement portion of the cover member and supports the cover member;
The second support portion has a rod-like member extending in a direction substantially orthogonal to the cylinder row direction of the engine in plan view,
The cover member, wherein the second engaging portion is provided on a lower surface of the cover member, and has a pair of claw members that have elasticity and sandwich the rod-shaped member in a direction orthogonal to the longitudinal direction thereof. Mounting structure.   Two sets of the first support member and the first engagement portion are provided apart from each other in the cylinder row direction of the engine, and these, the second support member, and the second engagement portion, The cover member mounting structure according to claim 1, wherein the cover member is supported at three locations. The intake manifold is made of a resin including a surge tank part, and a branch pipe part curved upward from the surge tank part and connected to the intake port of the engine,
The branch pipe portion is formed by injection molding and a boss portion to which the rod-shaped member is attached is integrally formed,
3. The cover member mounting structure according to claim 1, wherein the boss portion is formed so as to protrude in the same direction as a die-cutting direction of the branch pipe portion after injection molding. 4.   The cover member mounting structure according to claim 3, wherein the branch pipe portion is integrally formed with a reinforcing rib that reinforces the boss portion against a load from above on the boss portion.   The cover member mounting structure according to claim 1, wherein a sound insulating material is provided on a lower surface of the cover member.

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