JP2011021486A - Engine cover mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine cover mounting structure preventing a grommet from remaining on an engine side when an engine cover is detached from an engine member. <P>SOLUTION: This engine cover mounting structure consists of: the engine over 1 provided with a cover body 11 and a mounting pedestal composed of a frame body arranged on the rear surface of the cover body and internally having a storage space; a projection projecting from the engine member; and the grommet composed of an elastic body retained by the mounting pedestal and also fitted around the projection. The grommet retained by the mounting pedestal is fitted in the projection, thereby achieving such a mounting state that the engine cover is attached to the engine member. The mounting pedestal has a wall surrounding the storage space, and an opening 17 formed in the wall and having the grommet inserted therein. In the mounting state, the opening is oriented in an inclination direction D inclined in a vehicle longitudinal direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an engine cover mounting structure for mounting an engine cover on a projection or the like protruding from the engine side.

  In recent years, it is common to place an engine cover over an automobile engine to cover the engine. The engine cover has a function of blocking noise (transmitted sound) leaking from the engine and a function of visually blocking the engine to enhance the design in the engine room.

  Conventionally, for example, as shown in FIG. 6, the engine cover 9 is fixed to a protruding portion 71 protruding from the engine member 7 via a rubber grommet 8. The engine cover 9 has a cover main body 91 and a mounting base 92 protruding from the back surface of the cover main body 91. The mounting base 92 is a frame-like body having an accommodating space 90 therein, and includes a bottom wall portion 95 having a fitting hole 93 into which the grommet 8 is fitted, and between the bottom wall portion 95 and the back surface of the cover main body 91. The peripheral wall portion 96 is formed so as to surround the accommodating space 90, and the opening portion 97 opens at a part of the peripheral wall portion 96 in the circumferential direction. The grommet 8 is made of rubber, has an insertion hole 81 into which a protrusion 71 protruding from the engine member 7 is inserted, and has an engaging groove 82 that engages with the periphery of the fitting hole 93 on the outer peripheral portion. By fitting the grommet 8 into the fitting hole 93 of the mounting base 92 and then inserting the projection 71 of the engine member 7 into the insertion hole 81 of the grommet 8, the engine cover 9 is fitted to the projection of the engine member 7. 71 can be fixed.

  By the way, the engine cover 9 is removed from the engine member 7 when the engine is serviced. At this time, since the engine cover mounting structure cannot be confirmed from the outside, the operator lifts the engine cover 9 in a direction inclined in the vehicle front direction (the direction of arrow A in FIG. 6) with respect to the axial direction of the protrusion 71. It tries to be pulled out from the protrusion 71. For this reason, when the opening 97 of the mounting base 92 is formed backward, the grommet 8 may remain on the engine member 7 side. Then, when reassembling the engine cover 9 without noticing that the grommet 8 remains after maintenance, the grommet 8 remaining on the engine member 7 side interferes with the mounting base 92 to damage the engine cover 9. There was something to do.

JP 2009-79613 A

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an engine cover mounting structure in which no grommet remains on the engine side when the engine cover is removed from the engine member.

  An engine cover mounting structure according to the present invention includes an engine cover provided with a cover main body and a mounting base made of a frame-like body that is disposed on the back side of the cover main body and has a storage space therein, and is protruded from the engine member. The engine cover is formed on the engine member by fitting the grommets made of an elastic body that is held on the mounting base and fitted into the protruding base and fitted on the mounting base. An engine cover mounting structure in a mounted state, wherein the mounting base has a wall portion surrounding the housing space and an opening formed in the wall portion through which the grommet can be inserted. The opening is directed in a direction inclined with respect to the vehicle longitudinal direction.

  According to the mounting structure of the engine cover of the present invention, the opening portion of the mounting base is formed so as to face an inclined direction inclined with respect to the vehicle longitudinal direction in the mounted state. Therefore, when the engine cover is to be tilted upward and tilted forward in the vehicle direction, the grommet is protruded with the rear peripheral edge of the fitting hole of the mounting base engaged with the engaging groove of the grommet. It will escape like a squeeze along the projection while pressing it sideways and causing it to elastically deform. Therefore, the grommet is not detached from the engine cover while being fitted to the mounting base of the engine cover, and the grommet does not remain on the engine member side in a state of covering the engine side protrusion. For this reason, when the engine cover is reassembled, there is no problem that the mounting base of the engine cover interferes with the grommet remaining on the engine side protrusion and damages the engine cover.

  On the other hand, in the prior art shown in FIG. 6, the mounting base 92 of the engine cover 91 is formed so as to open rearward in the vehicle front-rear direction. A slit 98 communicates from the opening 97 to the fitting hole 93, and the peripheral edge of the fitting hole to be engaged is missing in a range facing the slit 98 of the engagement groove 82 of the grommet 8. Therefore, when the engine cover 91 is to be tilted upward and tilted forward in the vehicle direction (arrow A direction), the slit 98 is disposed in the inclination direction of the engine cover 9 with respect to the grommet 8 (vehicle longitudinal direction). In other words, the grommet 8 is not restricted by the peripheral edge portion of the fitting hole 93 at least in the range facing the slit 98. Therefore, the grommet 8 is easily detached from the fitting hole 93, and the grommet 8 may remain on the engine member 7 side in a state where the engine side protrusion 71 is covered.

  In the engine cover mounting structure according to the present invention, the cover body has a substantially constant thickness and a substantially shallow dish shape with a convex upper surface, and is integrally projected on the back surface of the cover body along the outer peripheral edge of the cover body. It is preferable that the mounting base is provided integrally with the rib on the rear side of the cover body when the longitudinal direction of the vehicle in the mounted state is the longitudinal direction of the cover body. In particular, it is preferable that the opening is directed obliquely rearward of the vehicle in the mounted state.

  When the cover main body has a substantially shallow dish shape with a convex upper surface having ribs depending on the periphery thereof, the opening direction of the mounting base provided on the back side of the cover main body is restricted by the direction of the slide core of the mold. However, when the mounting base is provided integrally with the rib on the rear side of the cover main body, the mounting base is disposed outside the cover main body, so that the mounting base is inclined with respect to the vehicle longitudinal direction. The slide core is easy to set. Therefore, it is advantageous in terms of mold design.

It is a top view of the engine cover concerning an example. It is a front view (view B of Drawing 1) of an engine cover concerning an example. It is sectional drawing (CC cross section in FIG. 1) of the attachment structure of the engine cover which concerns on an Example. It is a perspective view explaining the method of fitting a grommet to the mounting base of the engine cover which concerns on an Example. It is principal part sectional drawing of the attachment structure of the engine cover which concerns on an Example. It is sectional drawing of the attachment structure of the engine cover which concerns on a prior art example.

  In the engine cover mounting structure of the present invention, the engine cover is held on any part of the engine member and is disposed on the upper part of the engine member, and may cover only a part of the engine member. Alternatively, it may cover the entire engine member. Here, the engine member refers to an engine body composed of a cylinder and a piston, a cylinder head cover that covers the cylinder head of the engine body, a device that supplies fuel and air to the engine body, a cam device that controls intake and exhaust, an oil circulation device, and the like The engine cover is held at the tip of the engine-side protrusion protruding from the engine member via a grommet made of an elastic material.

  The engine cover has a plurality of mounting bases, but the openings of all the mounting bases are not necessarily provided in the inclined direction inclined with respect to the vehicle longitudinal direction. However, when the mounting base is provided integrally with the rib on the rear side of the cover body, it is desirable to form the opening so as to be directed obliquely rearward with respect to the vehicle longitudinal direction. Here, diagonally backward means 15 to 75 ° backward in the clockwise or counterclockwise direction with respect to the vehicle longitudinal direction. If the angle α is too small, the effect of directing the opening obliquely backward cannot be obtained. On the other hand, when the angle α is too large, the sliding direction of the slide core for forming the opening is easily restricted.

  The engine cover can be molded by a known method such as injection molding using a known resin material such as PP or PA as a raw material. The mounting base of the engine cover is desirably formed integrally with the cover body, and is formed using a slide core for mounting base mounting in a mold.

  The grommet can be molded by a known method such as injection molding using a known elastic material such as rubber or elastomer. In this case, the insertion hole of the grommet is formed using, for example, a slide core for forming the insertion hole in a mold.

  Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of the engine cover 1, and FIG. FIG. 3 is a cross-sectional view of the engine cover mounting structure I (cross-section CC in FIG. 1). FIG. 4 is a perspective view for explaining a method of fitting the grommet to the mounting base of the engine cover. FIG. 5 is a cross-sectional view of a main part of the engine cover mounting structure.

  As shown in FIGS. 1 to 3, the engine cover mounting structure I of the present embodiment is an elastic body that is held by the mounting base 12 on the engine-side protrusion 21 that protrudes from the engine member 2. It is the structure attached through the grommet 3 which consists of. In the present embodiment, the engine member 2 is a cylinder head cover provided on the upper portion of the engine (not shown). Protruding portions 21 projecting upward are provided at three positions on the left and right sides and the rear side of the upper portion of the engine member 2.

  As shown in FIGS. 1 and 2, the engine cover 1 has a cover main body 11 and a mounting base 12 (12 a, 12 b, 12 c) formed so as to protrude to the back surface 11 a of the cover main body 11. The cover body 11 has a substantially shallow dish shape with a substantially constant thickness and a convex upper surface, and is formed such that the ribs 14 for reinforcing the body or for sound insulation hang along the outer peripheral edge thereof.

  The engine cover 1 is provided with mounting bases 12a, 12b, and 12c at positions corresponding to the protrusions 21 provided on the engine member 2, respectively.

  Since the mounting bases 12b and 12c projecting from the back surface side of the cover body 11 have substantially the same configuration, the mounting base 12b will be described below. As shown in FIG. 4, the mounting base 12 b is a frame-like body that is integrally provided upright on the back surface side of the cover body 11, and includes a bottom wall portion 18, a peripheral wall portion 16, and an opening portion 17. The bottom wall portion 18 has a substantially semicircular shape, and is surrounded by the peripheral wall portion 16 that gradually increases in diameter from the arc-shaped outer peripheral end portion 18 c toward the cover body 11. A housing space 10 is formed between the peripheral wall portion 16, the bottom wall portion 18, and the back surface 11 a of the cover main body 11. Of the outer peripheral end portions of the semicircular bottom wall portion 18, the linear outer peripheral end portion 18 d is not connected to the peripheral wall portion 16, and the opening has a size capable of inserting the grommet 3 into the accommodation space 10. 17 The bottom wall portion 18 is provided with a fitting hole 13 for fitting the grommet 3, and the fitting hole 13 and the opening portion 17 are communicated by a slit 15.

  Between the peripheral wall portion 16 of the mounting base 12b and the cover main body 11, a base reinforcing rib 19a is provided. In addition, a pedestal reinforcing plate 19b is also provided in the accommodation space 10 of the mounting base 12b so as to divide the accommodation space 10 substantially horizontally.

  As shown in FIG. 3, the mounting base 12 a is formed on the outer side of the cover body 11 so as to be continuous with the ribs 14 formed on the rear periphery of the cover body 11. The mounting base 12a is a frame-like body integrally provided on a reinforcing plate 19c provided horizontally on the rib 14, and includes a bottom wall portion 18, a peripheral wall portion 16, and an opening portion 17 similar to the mounting bases 12b and 12c. And a part of the peripheral wall portion 16 projects to the outside of the cover body 11.

  The mounting base 12a is formed such that its center line D is inclined with respect to the vehicle longitudinal direction L (FIG. 1). In other words, the mounting base 12 a is formed so that the opening 17 is directed diagonally to the right rear of the cover body 11. In the present embodiment, the angle α formed by the vehicle longitudinal direction L and the center line D of the mounting base 12a was 55 °. If the vehicle front-rear direction line L and the center line D of the mounting base 12a intersect, the size of the angle α is not particularly limited. However, in consideration of the stability of fitting between the mounting base 12a and the grommet 3 when the engine cover 1 is removed and the setting of the slide core in the mold, 15 ° <α <75 ° is preferable. Note that α is a clockwise angle with respect to the vehicle front-rear direction line L, but may be set counterclockwise with respect to the vehicle front-rear direction line L. Here, the center line D is a straight line that divides the slit 15 into two in the width direction and passes through the center of the fitting hole 13.

  As shown in FIG. 5, the grommet 3 has an insertion hole 31 into which the protruding portion 21 provided in the engine member 2 is inserted, and is fitted into the fitting hole 13 of the mounting base 12 to enter the accommodation space 10. It is the substantially cylindrical body arrange | positioned. The insertion hole 31 has a back part 31a that holds the head part 23 of the projection part 21, and an intermediate part 31b that holds the shaft part 22 of the projection part 21, and the intermediate part 31b has a smaller diameter than the back part 31a. Has been. Thereby, the head 23 of the projection 21 can be reliably held in the insertion hole 31. The grommet 3 has a ring-shaped engagement groove 32 on the outer periphery thereof, and can be engaged with the peripheral edge of the fitting hole 13 of the mounting base 12.

  In this embodiment, the procedure for attaching the engine cover 1 to the engine member 2 is to first insert the grommet 3 into the fitting hole 13 through the slit 15 from the opening 17 of the mounting base 12 of the engine cover 1. Accordingly, the grommet 3 is held in the accommodation space 10 of the mounting base 12 with the opening peripheral edge 3 b of the insertion hole 31 exposed to the outside from the fitting hole 13. As shown in FIG. 1, since the mounting base 12 is formed in three places in the cover main body 11, the grommet 3 is fitted in all three places. Note that the grommet 3 can also be fitted from the outside in the axial direction of the fitting hole 13 to the inside.

  Next, the engine cover 1 fitted with the grommet 3 is positioned on the upper part of the engine member 2. At this time, the engine cover 1 is held in a substantially horizontal direction with respect to the engine member 2. Then, the engine cover 1 is lowered and the grommet 3 is pressed against and pressed against the protrusion 21 protruding from the engine member 2. Thereby, each protrusion 21 is inserted into the insertion hole 31 of each grommet 3, and the engine cover 1 is stably held by the engine member 2.

  Next, when removing the engine cover 1 from the engine member 2, first, the engine cover 1 is lifted while being held in a substantially horizontal direction with respect to the engine member 2. When the rear of the engine cover 1 is further lifted and pulled forward, the grommet 3 is pulled out from the protrusion 21 in a state where the grommet 3 is fitted to the mounting base 12, and the engine cover 1 can be removed.

  According to the engine cover mounting structure I of the present embodiment, the mounting base 12a of the engine cover 1 is formed to open in a direction inclined with respect to the vehicle longitudinal direction L. Therefore, when the engine cover 1 is tilted upward and obliquely toward the front of the vehicle, the rear peripheral edge of the fitting hole 13 of the mounting base 12a is engaged with the engaging groove 32 of the grommet 3. Thus, the grommet 3 is squeezed along the projection 21 while being elastically deformed by pressing the grommet 3 toward the projection 21. Therefore, the grommet 3 is separated from the engine cover 1 in a state where the grommet 3 is fitted to the mounting base 12 of the engine cover 1, and the grommet 3 does not remain on the engine member 2 side while covering the protruding portion 21. For this reason, when the engine cover 1 is reassembled, there is no possibility that the mounting base 12 of the engine cover 1 interferes with the grommet 3 remaining on the engine-side protrusion 21 and damages the engine cover 1.

  The engine cover mounting structure of the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist of the present invention.

  The engine cover mounting structure of the present invention is suitable as a structure for mounting an engine cover to an engine block or the like that shields noise (transmitted sound) leaking from the engine and enhances design in the engine room. A similar mounting structure can be applied to a soundproof cover that shields noise other than engine noise.

1: Engine cover 2: Engine member 3: Grommet 11: Cover main body 12: Mounting base 13: Fitting hole 14: Rib for reinforcing or sound insulation 15: Slit 16: Peripheral wall portion 17: Opening portion 18: Bottom wall portion 21: Projection L: Vehicle length direction D: Mounting base center line α: Inclination angle

Claims (3)

An engine cover provided with a cover body and a mounting pedestal made of a frame-like body disposed inside the cover body and having a housing space inside;
A protrusion protruding from the engine member;
A grommet made of an elastic body that is held by the mounting base and fitted to the protrusion,
An engine cover mounting structure in which the engine cover is mounted on the engine member by fitting the grommet held on the mounting base to the protrusion.
The mounting base has a wall portion that surrounds the housing space, and an opening that is formed in the wall portion and through which the grommet can be inserted.
An engine cover mounting structure characterized in that, in the mounted state, the opening portion faces an inclined direction inclined with respect to a vehicle longitudinal direction. The cover body has a substantially shallow dish shape with a substantially constant thickness and a convex upper surface, and is provided for body reinforcement or sound insulation integrally projected on the back surface of the cover body along the outer peripheral edge of the cover body. With ribs,
The engine cover mounting according to claim 1, wherein the mounting base is integrally provided with the rib on the rear side of the cover body when the vehicle front-rear direction in the mounted state is the front-back direction of the cover body. Construction.   The engine cover mounting structure according to claim 1, wherein the opening portion faces obliquely rearward of the vehicle in the mounted state.

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