JP2019073045A - Resin lid structure - Google Patents

Abstract

To provide a resin lid structure characterized in that vibrational and acoustic properties are upgraded without impairment of a lightweight effect.SOLUTION: A resin lid structure includes a flange that has fastening parts to be fastened to a vehicle member, and a lid body coupled to the internal circumference of the flange, and further includes a reinforcement part at least in the vicinity of the lid body coupled to the flange. The total length of one end (nearest end) of the reinforcement part nearest to the internal circumference of the flange is one-third or more of the circumferential length of the internal circumference of the flange. The superficial area of the reinforcement part is two-thirds or less of the superficial area of the lid body. One or plural sheets made of a fiber-reinforced resin containing a reinforcement fiber continuous in one direction is/are layered on at least one of an internal surface and an external surface. The direction of fibers in all the layers of sheets or a half or more of the layers is set to a direction orthogonal to a straight line, which links the centers of two arbitrary adjacent fastening parts contained in the flange, within ±5°.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a resin lid structure attached to a vehicle, and relates to a resin lid structure having a flange portion provided with a fastening portion and a lid body portion connected to an inner peripheral portion of the flange portion and serving as a lid.

  A lid structure having a flange portion provided with a fastening portion is used in various parts of an automobile, and an oil pan for storing oil for cooling and lubrication inside an engine cylinder block, a transmission, etc., and an automobile The roof panel which hits a ceiling part etc. has the same lid structure.

  However, many of the lid structures of conventional automobile parts are made of iron, and since iron is a rigid and heavy material, it is difficult for vibration to occur and transmission of sound, and vibration is made without special design.・ It was possible to secure acoustic characteristics. However, in recent years, in various structures for vehicles as well as oil pans, for weight reduction of vehicles, replacement of various vehicle parts such as impact absorbing members with resin or fiber reinforced composite material has been considered. In order to improve the vibration and acoustic characteristics of a structure made of such a material, in general, a rib structure is provided or the thickness is increased to increase rigidity and design to improve vibration and acoustic characteristics. There are many things.

  In addition to the ribs, various structures are known which improve the rigidity by combining reinforcing fiber sheets continuous in one direction. For example, in Patent Document 1, a sheet material made of a thermoplastic resin containing reinforcing fibers continuous in one direction is laminated, formed in advance, and set in a flange portion on a mold, and thereafter, the above-described reinforcement is performed on the mold An oil pan is disclosed that is injected and integrally molded with a fiber-free thermoplastic resin.

  Moreover, the structure which made the rib located in the outer peripheral part the laminated body of a carbon fiber and a damping material is disclosed by patent document 3 as an advanced grid structure which is a panel structure.

Japanese Patent Application Publication No. 07-001503 Japanese Patent Application Laid-Open No. 07-027016 JP, 2008-273325, A

  However, the following problems remain in the prior art as described above. The structure described in Patent Document 1 is intended to strengthen the flange portion, the cover main body portion is not substantially reinforced, and vibration and acoustic measures are not sufficient.

  Moreover, in the structure described in Patent Document 2, the entire oil pan is reinforced with the inner surface on the side where oil is stored as the first layer portion, so that the portion that does not affect the improvement of vibration and acoustic performance is reinforced The cost of materials is high.

  Further, in the structure described in Patent Document 3, since the rib located at the outer peripheral portion is configured as a laminate of carbon fiber and a damping material, the rigidity of the outer peripheral portion is weak, and as a countermeasure against vibration and sound. The effect of raising rigidity is thin.

  SUMMARY OF THE INVENTION In view of the above-described problems in the prior art, an object of the present invention is to provide a resin lid structure having improved vibration and acoustic characteristics without losing its weight reduction effect.

  In order to solve the above problems, the present invention has a flange portion provided with a fastening portion to be fastened to a vehicle member, and a lid body portion connected to the inner peripheral portion of the flange portion, at least the lid body Resin lid structure having a reinforcing portion in the vicinity of the flange portion of the portion, wherein the total length of one end (the closest end) of the reinforcing portion most similar to the inner peripheral portion of the flange portion is It is 1/3 or more of the circumferential length of the inner circumferential portion, and the surface area of the reinforcing portion is 2/3 or less of the surface area of the lid body portion, in one direction on at least one surface of the inner surface and the outer surface A sheet made of a fiber reinforced resin containing continuous reinforcing fibers is laminated in one or more layers, and any or all of the layers or half or more of the fiber direction of the sheet are included in the flange portion facing the closest end. A straight line connecting the centers of two adjacent fasteners 5 ° is provided in the direction orthogonal within, characterized in that is.

  The reinforcing portion of the present invention may be disposed in a region opposed to an arbitrary center line in the projection plane of the lid body portion.

  Preferably, the reinforcing portion is disposed along the longitudinal direction of the lid body.

  In addition to the reinforcing portion of the present invention, the reinforcing portion further includes an additional reinforcing portion disposed along the center between the reinforcing portions disposed in the vicinity of the opposing flange portion, the additional reinforcing portion being at least at least the inner surface and the outer surface. A sheet made of a fiber reinforced resin containing reinforcing fibers continuous in one direction is laminated on one side or a plurality of layers, and the fiber direction of all the layers or half or more of the sheet is the reinforcing portion near the opposing flange portion It is even better to be installed within ± 5 ° of the center direction of the.

  In the vicinity of the lid body portion with the flange portion, the distance between the inner peripheral portion of the flange portion and the closest end is within 5% of the length in the longitudinal direction of the lid body portion. Good.

  It is preferable that the fiber direction of at least a part of the layers of the sheet laminated to the reinforcing portion is one direction.

  The fiber direction of at least a part of the layers of the sheet laminated to the reinforcing portion may be at least two or more.

  The vehicle member and the fastening portion may be fastened by at least one of a bolt, welding, an adhesive, and welding.

  The reinforcing fibers of the sheet may be at least one of carbon fibers and glass fibers.

  It is preferable that the resin of the sheet is a thermoplastic resin.

  The flange portion and the lid main body portion may be made of at least one of a carbon fiber reinforced composite resin, a glass fiber reinforced resin, and a resin alone.

  Further, the resin lid structure and the sheet of the reinforcing portion may be integrally formed in a mold to reduce man-hours at the time of molding and to manufacture efficiently.

  In addition, when problems of vibration and sound occur after forming a mold for the resin lid structure, and a countermeasure is required, the resin lid structure is molded and then the sheet of the reinforcing portion is adhered and manufactured. May be

  According to the present invention, the rigidity of the lid body can be increased, and a resin lid structure having high vibration and acoustic characteristics can be provided.

It is the top view of (a) resin lid structure which concerns on the 1st Embodiment of this invention, and the elements on larger scale of the upper half of the (b) resin lid structure. (A) The top view of the resin cover structure which concerns on the 2nd Embodiment of this invention, (b) It is a top view which shows the center direction of the reinforcement part of a resin cover structure, and the fiber direction of an additional reinforcement part. It is a top view of the resin lid structure which concerns on the 3rd Embodiment of this invention. It is a top view of the resin lid structure which concerns on the 4th Embodiment of this invention. It is an example of the perspective view of the primary intrinsic vibration mode of a resin cover structure. It is an example of sectional drawing of the flange part periphery of a resin cover structure. It is an example of sectional drawing of the flange part periphery of a resin cover structure. It is an example of sectional drawing of the flange part periphery of a resin cover structure. It is an example of sectional drawing of the flange part periphery of a resin cover structure.

  Preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1: (a) The top view which looked at the resin lid structure which concerns on the 1st Embodiment of this invention from the front, (b) The elements on larger scale of the upper half of a resin lid structure. The resin lid structure 100 is provided with a fastening portion 102 at the flange portion 101, and is composed of a lid main body portion 103 connected to the inner peripheral portion of the flange portion 101, and the vicinity of the lid main body portion 103 with the flange portion 101. It is important that the reinforcement portion 104 be formed on the

  In the present embodiment, one end of the reinforcing portion 104 most similar to the inner peripheral portion of the flange portion 101 is the closest end 110, and the total length of the closest similar end 110 is 1/1 of the circumferential length of the inner peripheral portion of the flange portion 101. The surface area of the reinforcing portion 104 is 2/3 or less of the surface area of the lid body portion 103. Here, the surface area is an area calculated along the shape of the lid body 103.

  Also, one or more layers of a unidirectional continuous fiber reinforced sheet impregnated with a thermoplastic resin are laminated on either or both of the inner surface and the outer surface of the reinforcing portion 104. . Further, as shown in FIG. 1 (b), any layer in which all or half or more of the fiber direction of the unidirectional continuous fiber reinforced sheet of the reinforcing portion 104 is included in the region of the flange portion 101 facing the closest end 110. It is important that they are installed in a direction perpendicular to a straight line connecting the centers of two adjacent fastening portions 102 within ± 5 °.

  Such a configuration can be realized by integrally molding the resin lid structure 100 and the unidirectional continuous fiber reinforced sheet of the reinforcing portion 104 in a molding die, and molding the resin lid structure 100. It can also be realized by bonding a direction-continuous fiber reinforced sheet to the reinforcing portion 104 after this.

  In the resin lid structure 100 as described above, the primary natural vibration mode of vibration is usually a vibration mode such as the primary natural vibration mode 500 shown in FIG. 5, and the center of the lid main body 103 vibrates largely. On the contrary, a portion close to the flange portion 101 is a vibration mode in which the vibration becomes small. In such a vibration mode, since the reinforcing portion 104 near the flange portion 101 in the lid main body portion 103 has the largest strain, the vibration can be effectively suppressed by reinforcing the portion having a large strain. Furthermore, the unidirectional continuous fiber reinforced sheet has high rigidity in the fiber direction and low rigidity in the fiber orthogonal direction, and the fiber direction of the unidirectional continuous fiber reinforced sheet of the reinforcing portion 104 is set to the two fastening portions 102 in the vicinity. The rigidity can be enhanced along the direction of deformation of the vibration mode by orienting in a direction orthogonal to ± 5 ° with the straight line connecting the centers of the centers, so that the rigidity of the lid main body 103 can be efficiently improved. It is effective as an acoustic measure.

  Further, in the case where the resin lid structure 100 has a target structure with respect to the center line 120, in the region where the reinforcing portion 104 faces the arbitrary center line 120 in the projection plane of the lid body portion 101. By being arranged, it is possible to reinforce a portion having a large strain in a well-balanced manner, so that it is possible to more efficiently suppress the vibration such as the primary natural vibration mode 500.

  FIG. 2 is a plan view of a resin lid structure according to a second embodiment of the present invention. Similar to the first embodiment, the resin lid structure 200 includes the lid main body 203 having the fastening portion 202 installed in the flange portion 201 and connected to the inner peripheral portion of the flange portion 201, and the lid main body A reinforcing portion 204 is formed in a region near the flange portion 201 of the portion 203. In addition, it has the additional reinforcement part 205 arrange | positioned along the center of the reinforcement part 204 near the opposing flange part 201. FIG.

  In this embodiment, one or more layers of a unidirectional continuous fiber reinforced sheet impregnated with a thermoplastic resin are laminated on either or both of the inner surface and the outer surface of the additional reinforcing portion 205. It is Further, as shown in FIG. 2B, all layers or half or more of the fiber directions of the unidirectional reinforcing fiber reinforced sheet of the additional reinforcing portion 205 are ± 5 ° of the center direction of the reinforcing portion 204 near the opposing flange portion. It is installed in agreement within. It differs from the first embodiment in that an additional reinforcing portion 205 is arranged in addition to the lid structure reinforcing portion 204. By configuring the additional reinforcing portion 205 in this manner, the rigidity of the lid main body portion 203 can be more effectively improved.

  Here, the distance L between the flange portions 101 and 201 is the length in the longitudinal direction of the lid body portion with the vicinity of the lid body portion 103 with the flange portion 101 and the proximity with the flange portion 201 of the lid body portion 203 The region adjacent to the range within 5% of

  Here, the fiber direction refers to the direction in which reinforcing fibers contained in the unidirectional continuous fiber reinforced sheet are most oriented.

  Preferably, the reinforcing portion is disposed along the longitudinal direction of the lid body. In the case where the lid main body is rectangular as shown in FIGS. 1 and 2, the reinforcing portion may be disposed in the direction along the long side, but in the case other than the rectangle illustrated in FIG. 3 and FIG. The disposition along the longitudinal direction of the main body portion is preferably treated as a mode in which the reinforcing portion is disposed along the extension direction of the flange portion as described in detail below.

  FIG. 3 is a plan view of a resin lid structure according to a third embodiment of the present invention. Similar to the first embodiment, the resin lid structure 300 includes a lid main body 303 in which the fastening portion 302 is installed in the flange portion 301 and connected to the inner peripheral portion of the flange 301, and the lid main body Reinforcing portions 304 and 305 are formed in a region near the flange portion 301 of the portion 303. The resin lid structure 300 has an asymmetric structure with respect to the center line 320 unlike the resin lid structure 100 of the first embodiment. The resin lid structure 100 according to the first embodiment has a symmetrical structure with respect to the center line 120, and therefore, the reinforcing portion 104 can be disposed in a region facing the arbitrary center line 120. However, in the third embodiment 300, although the reinforcement portion 305 can be disposed in a region facing the center line 320, the reinforcement portion 304 can not be disposed to face the center line 320, so a part of the reinforcement portion is reinforced. Like the part 304, it may be arranged along the extension direction of the flange part 301.

  FIG. 4 is a plan view of a resin lid structure according to a fourth embodiment of the present invention. Similar to the first embodiment, the resin lid structure 400 includes a lid main body 403 in which the fastening portion 402 is installed in the flange portion 401 and is connected to the inner peripheral portion of the flange 401, and the lid main body Reinforcing portions 404 and 405 are formed in a region near the flange portion 401 of the portion 403. The resin lid structure 400 is circular as a whole, unlike the resin lid structure 100 of the first embodiment. When the outer edge of the lid body 403 is a curve such as a circle, it may be a straight line like the closest end 414 of the reinforcement portion 404 or a curve like the closest end 415 of the reinforcement portion 405.

  Next, the structure of the whole resin lid structure is demonstrated using FIGS. 6-9.

  FIG. 6 is an example of a cross-sectional view around a flange portion of a resin lid structure. The resin lid structure 600 is provided with a fastening portion 602 at the flange portion 601, and is composed of a lid main body portion 603 at the inner edge of the flange portion 601. In the present structure, the flange portion 601 may have a portion where the vehicle member 610 contacts the resin lid structure 600 at the time of fastening with the vehicle member 610 as the flange portion 601.

  FIG. 7 is an example of a cross-sectional view around the flange portion of the resin lid structure. The resin lid structure 700 is provided with a fastening portion 702 at the flange portion 701, and is constituted by a lid main body portion 703 at the inner edge of the flange portion 701. In this structure, the flange portion 701 may have a portion with a constant thickness around the fastening portion 702 as the flange portion 701.

  FIG. 8 is an example of a cross-sectional view around a flange portion of a resin lid structure. The resin lid structure 800 is provided with a fastening portion 802 and a packing groove portion 820 in the flange portion 801, and is constituted by a lid main body portion 803 at the inner edge of the flange portion 801. In the present structure, the flange portion 801 may be an integral part including the portion having a constant thickness around the fastening portion 802 and the packing groove portion 820 in which the packing is installed at the time of assembly.

  FIG. 9 is an example of a cross-sectional view around a flange portion of a resin lid structure. The resin lid structure 900 is provided with a fastening portion 902 and a packing groove portion 920 in the flange portion 901, and is constituted by a lid main body portion 903 at the inner edge of the flange portion 901. In this structure, the flange portion 901 may be a portion where the vehicle member 910 contacts the resin lid structure 900 when it is fastened with the integral vehicle member 910 including the packing groove portion 920 in which the packing is installed at assembly.

  In addition, although a fastening portion for fastening to a vehicle member is not particularly limited to the fastening method, generally, bolts, welding, adhesives, welding, etc. are often used, and any one of the methods alone is used. Some methods may be used in combination.

  In addition, by laminating the unidirectional continuous fiber reinforced sheet in one direction as compared with the case where the fiber orientation direction is oriented in multiple directions by aligning the fiber orientation direction of the unidirectional continuous fiber reinforced sheet layers in the same direction It will do and molding will be easy.

  There are no particular limitations on the reinforcing fibers used in the unidirectional continuous fiber reinforcing sheet, and carbon fibers, glass fibers, aramid fibers, metal fibers, PBO (polyparaphenylene benzobisoxazole) fibers, or a combination thereof may be mentioned. Be Above all, by making the reinforcing fibers of the unidirectional continuous fiber reinforced sheet into carbon fibers, it is possible to reduce the lamination amount of the unidirectional continuous fiber reinforced sheet by utilizing the characteristics of high rigidity and high strength of the carbon fibers.

  On the other hand, the fiber orientation directions of the unidirectional continuous fiber reinforced sheet layers may be two or more. In order to increase the rigidity of the lid body, not only the same direction as described above, but also arranging in the orthogonal direction, ± 45 ° direction, etc., improvement in torsional rigidity etc. can be realized simultaneously.

  Further, the thermoplastic resin contained in the unidirectional continuous fiber reinforced sheet is not particularly limited, and thermoplastic resins such as polyester, polyamide and polyolefin can be used.

  By forming the flange portion and the lid main body portion by the fiber reinforced composite material, it is possible to reduce the thickness of the flange portion and the lid main body portion, and the range of the unidirectional continuous fiber reinforced sheet of the reinforcing portion can be narrowed. The fiber reinforced composite material is not particularly limited, and the same material as the unidirectional continuous fiber reinforced sheet can be used. Here, when integrating a lid main-body part and a unidirectional continuous fiber reinforced sheet by thermoplastic resins, it is preferable to use the same kind of thermoplastic resin.

  In addition, when strength and rigidity are not required for the lid itself, the flange portion and the lid body portion may be made of a glass fiber reinforced composite material that can be manufactured inexpensively.

  The present invention is suitably applied not only to oil pans and roof panels for vehicles, but also to the overall lid structure of vehicles.

Reference Signs List 100 resin lid structure 101 flange portion 102 fastening portion 103 lid body portion 104 reinforcing portion 110 nearest end 120 center line 200 resin lid structure 201 flange portion 202 fastening portion 203 lid body portion 204 reinforcing portion 205 additional reinforcing portion 300 resin lid Structure 301 Flange portion 302 Fastening portion 303 Cover body portion 304 Reinforcement portion 305 Reinforcement portion 320 Center line 400 Resin lid structure 401 Flange portion 402 Fastening portion 403 Cover body portion 404 Reinforcement portion 405 Reinforcement portion 414 The closest end of the reinforcement portion 404 415 Most similar end 500 of reinforcing portion 405 Primary natural vibration mode 600 of resin lid structure Resin lid structure 601 Flange portion 602 Fastening portion 603 Lid body portion 610 Vehicle member 700 Resin lid structure 701 Flange portion 702 Fastening portion 703 Lid Main body 800 Resin lid structure 01 flange 802 fastening part 803 the lid main body 820 packing groove 900 resin cover structure 901 flange 902 fastening part 903 the lid main body 910 vehicle member 920 packing groove

Claims (11)

It has a flange portion provided with a fastening portion to be fastened to a vehicle member, and a lid body portion connected to the inner peripheral portion of the flange portion, and has a reinforcing portion at least near the flange portion of the lid body portion A resin lid structure,
The total length of one end (most similar end) of the reinforcing portion most similar to the inner peripheral portion of the flange portion is 1/3 or more of the circumferential length of the inner peripheral portion of the flange portion,
The surface area of the reinforcing portion is 2/3 or less of the surface area of the lid body portion,
A sheet made of a fiber reinforced resin containing reinforcing fibers continuous in one direction is laminated on one or more layers on at least one surface of the inner surface and the outer surface,
The fiber direction of all layers or half or more of the sheet is installed in a direction orthogonal to ± 5 ° with a straight line connecting centers of any two adjacent fastening portions included in the flange portion facing the closest end A resin lid structure characterized in that   The resin lid structure according to claim 1, wherein the reinforcing portion is disposed in a region facing an arbitrary center line in a projection plane of the lid body portion.   The resin lid structure according to claim 1, wherein the reinforcing portion is disposed along the longitudinal direction of the lid body portion.   In addition to the reinforcing portion, the additional reinforcing portion is disposed along the center between the reinforcing portions disposed in the vicinity of the opposing flange portion, and the additional reinforcing portion is in one direction on at least one surface of the inner surface and the outer surface. Sheets made of a fiber reinforced resin containing continuous reinforcing fibers are laminated in one layer or plural layers, and the fiber direction of all layers or half or more of the sheets is ±± of the central direction of the reinforcing part near the opposing flange part The resin lid structure according to any one of claims 1 to 3, which is installed in unison within 5 °.   In the vicinity of the lid body portion with the flange portion, the distance between the inner peripheral portion of the flange portion and the closest end is within 5% of the length of the lid body portion in the longitudinal direction. Resin lid structure in any one of 1-4.   The resin lid structure according to any one of claims 1 to 5, wherein a fiber direction of at least a part of layers of the sheet laminated to the reinforcing portion is one direction.   The resin lid structure according to any one of claims 1 to 5, wherein a fiber direction of at least a part of layers of the sheet laminated to the reinforcing portion is at least two directions or more.   The resin lid structure according to any one of claims 1 to 7, wherein the vehicle member and the fastening portion are fastened by at least one of a bolt, welding, an adhesive and welding.   The resin lid structure according to any one of claims 1 to 8, wherein the reinforcing fiber of the sheet is at least one of carbon fiber and glass fiber.   The resin lid structure according to any one of claims 1 to 9, wherein the resin of the sheet is a thermoplastic resin.   The resin lid structure according to any one of claims 1 to 10, wherein the flange portion and the lid body portion are formed of at least one of a carbon fiber reinforced composite resin, a glass fiber reinforced resin, and a single resin.