Support for vibration isolation device

Abstract

Provided is a support for a vibration isolation device with improved durability. The support (1) includes a support main body (2) and a reinforcing member (3), and the inner surface (32) of the reinforcing member (3) is embedded in the main body (2). The reinforcing member (3) has a division end surface (31) that divides the reinforcing member (3) into a planar shape. At least a portion of the division end surface (31) is an inclined surface (32a) formed by the inner surface (32) of the reinforcing member (3) being inclined toward the outer surface (33) of the reinforcing member (3).

Description

TECHNICAL FIELD

[0001] The present application relates to a support for a vibration isolation device. BACKGROUND

[0002] As a support for a vibration isolation device in the past, there is a structure in which a reinforcing member formed of fiber-reinforced plastic is fixed to an outer peripheral portion of a surrounding portion of a support main body formed of synthetic resin, with the aim of achieving both weight reduction and durability improvement (for example, refer to Patent Literature 1).

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2019-78380 SUMMARY

[0006] Problems to be Solved by the Invention

[0007] However, there is room for improvement in the durability of the above-described support for a vibration isolation device in the past.

[0008] An object of the present application is to provide a support for a vibration isolation device in which durability is improved.

[0009] Means for Solving the Problems

[0010] The support for a vibration isolation device of the present application includes a support main body formed of synthetic resin and a reinforcing member formed of fiber-reinforced plastic, and in the reinforcing member, an inner surface of the reinforcing member is embedded in the support main body, and in the support for a vibration isolation device, the reinforcing member has a division end surface that divides the reinforcing member into a planar shape, and at least a portion of the division end surface of the reinforcing member is a slanted surface formed by an inner surface of the reinforcing member that is inclined toward an outer surface of the reinforcing member. According to the support for a vibration isolation device of the present application, durability can be improved.

[0011] In the support for a vibration isolation device of the present application, it is preferable that the slanted surface be formed by a curved surface that protrudes outward. In this case, durability can be further improved.

[0012] In the support for a vibration isolation device of the present application, it is preferable that the curved surface have a cross-sectional profile shape formed by one radius of curvature that is larger than a maximum thickness of the reinforcing member. In this case, durability can be further improved.

[0013] In the support for a vibration isolation device of the present application, it is preferable that the divided end surface of the reinforcing member includes a short-side direction extended end surface extending in the short-side direction, and the at least a part of the divided end surface of the reinforcing member is the short-side direction extended end surface. In this case, the durability can be further improved.

[0014] In the support for a vibration isolation device of the present application, it is preferable that the divided end surface of the reinforcing member includes a long-side direction extended end surface extending in the long-side direction, and the at least a part of the divided end surface of the reinforcing member is the long-side direction extended end surface. In this case, the durability can be further improved.

[0015] In the support for a vibration isolation device of the present application, it can also be that the inclined surface is formed by a flat surface.

[0016] Effects of the Invention

[0017] According to the present application, it is possible to provide a support for a vibration isolation device with improved durability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a front view of a support for a vibration isolation device of an embodiment of the present application, as viewed in the axis direction.

[0019] Fig. 2A is a front view of a support for a vibration isolation device of an embodiment of the present application, as viewed in the axis direction. Fig. 1 is a plan view of the reinforcing member of the support for a vibration isolation device of

[0020] Fig. 2B is a short-side direction side view of the reinforcing member of Fig. 2A

[0021] Fig. 3 is a side view of Fig. 1

[0022] Fig. 4A is a front view of a support for a vibration isolation device of an embodiment of the present application, as viewed in the axis direction. Fig. 1 is an enlarged view of a region of the support for a vibration isolation device of

[0023] Fig. 4B is an enlarged view of a region of the support for a vibration isolation device of another embodiment of the present application, as viewed in the axis direction, including a short-side direction extended end surface of a reinforcing member.

[0024] Fig. 4C ​​is an enlarged view of the bracket for a vibration isolation device of the comparative example of the present application, which roughly indicates a region including the short side direction extending end surface of the reinforcing member in the bracket for a vibration isolation device from the axial direction.

[0025] Fig. 4D is an enlarged view of the bracket for a vibration isolation device of another comparative example of the present application, which roughly indicates a region including the short side direction extending end surface of the reinforcing member in the bracket for a vibration isolation device from the axial direction.

[0026] Fig. 5 is Fig. 1 an A-A sectional view.

[0027] Fig. 6 is Fig. 5 an enlarged view.

[0028] Fig. 7 is Fig. 1 a plan view.

[0029] Fig. 8 is Fig. 1 a bottom view.

[0030] Fig. 9 is a perspective view of Fig. 1 from the left front top surface side.

[0031] Fig. 10 is a perspective view of Fig. 1 from the left back top surface side.

[0032] Fig. 11 is a perspective view of Fig. 1 from the left front bottom surface side.

[0033] Fig. 12 is a perspective view of Fig. 1 from the left back bottom surface side.

[0034] Fig. 13 is a perspective view of Fig. 1 from the right front top surface side. DETAILED DESCRIPTION

[0035] Hereinafter, a bracket for a vibration isolation device of an embodiment of the present application will be described with reference to the drawings.

[0036] Fig. 1 is a front view of the bracket for a vibration isolation device 1 (also simply referred to as "bracket 1") of an embodiment of the present application. Fig. 1 is a so-called vehicle installation left-right direction view when the bracket 1 is installed in a vehicle, which is observed from the left-right direction of the vehicle. In the following description, Fig. 1 is a view when the bracket 1 is observed from the left direction at the time of vehicle installation. That is,Fig. 1 the left direction of the vehicle at the time of installation is the front direction, Fig. 1 the right direction of the vehicle at the time of installation is the rear direction. In addition, in the following description, the upper direction of the vehicle at the time of installation is set as the upper direction, Fig. 1 the lower direction of the vehicle at the time of installation is set as the lower direction. Fig. 1

[0037] The bracket 1 of the present embodiment is an engine mount bracket for mounting an engine to a vehicle body. The bracket 1 can be coupled to the vehicle body. The bracket 1 has a through-hole 1A. In the present embodiment, the through-hole 1A is a through-hole formed in a bracket main body 2. A vibration isolation device main body (not shown) can be housed in the through-hole 1A. The vibration isolation device main body can be coupled to the engine. Thus, the bracket 1 can couple the vehicle body and the engine via the vibration isolation device main body.

[0038] Further, in the drawings, the vibration isolation device main body is omitted. As the vibration isolation device main body, for example, a vibration isolation member that couples an inner cylinder and an outer cylinder with an elastic body (e.g., rubber) can be cited. In the case of such a vibration isolation member, the outer cylinder is mounted to the bracket 1 and the inner cylinder is mounted to the engine.

[0039] However, the bracket 1 can be coupled to the engine so as to couple the vibration isolation device main body to the vehicle body. In addition, the bracket 1 is not limited to an engine mount bracket. The bracket 1 can couple the bracket main body 2 to one of a vibration generating side and a vibration receiving side other than the engine and the vehicle body, and can couple the vibration isolation device main body to the other of the vibration generating side and the vibration receiving side.

[0040] Reference sign O1 is a center axis of the bracket 1 (hereinafter, also simply referred to as "center axis O1"). In the present embodiment, the center axis O1 is coaxial with a center axis of the through-hole 1A. In the present embodiment, a direction in which the center axis O1 extends is referred to as an "axial direction". Further, in the present embodiment, the "axial direction" is synonymous with the "left-right direction of the vehicle at the time of installation". In addition, in the present embodiment, a direction orthogonal to the center axis O1 is referred to as a "radial direction". Further, in the present embodiment, the "radial direction" includes the "front-rear direction of the vehicle at the time of installation" and the "upper-lower direction of the vehicle at the time of installation". Moreover, in the present embodiment, in a cross section (axial-radial cross section) that takes the center axis O1 as a perpendicular line, a direction in which a circle is extended around the center axis O1 is referred to as a "circumferential direction".

[0041] The bracket 1 includes a bracket main body 2 formed of a synthetic resin and a reinforcing member 3 formed of fiber-reinforced plastic.

[0042] ​As the synthetic resin forming the bracket main body 2, for example, a thermoplastic synthetic resin, a thermosetting synthetic resin can be listed. It is preferable to use a thermoplastic synthetic resin as the synthetic resin. As such a thermoplastic synthetic resin, for example, a polyamide (PA) such as 6-6 nylon, 6 nylon, 9 nylon, and the like, polypropylene (PP), and the like can be listed.

[0043] The bracket main body 2 has a surrounding portion 20 that surrounds the vibration isolation device main body.

[0044] In the present embodiment, a through-hole 1A is formed on the inner side of the surrounding portion 20. In the present embodiment, the surrounding portion 20 has a first surrounding portion 21 and a second surrounding portion 22. The through-hole 1A is formed by the first surrounding portion 21 and the second surrounding portion 22. The second surrounding portion 22 is a fixed base portion that can be fixed to the vehicle body. In the present embodiment, the second surrounding portion 22 has a protruding portion 22a that protrudes to the outer side in the axial direction with respect to the first surrounding portion 21. In the present embodiment, the protruding portion 22a protrudes to the outer side in the vehicle mounting front-rear direction with respect to the first surrounding portion 21 in the vehicle mounting front-rear direction at the time of vehicle mounting.

[0045] The first surrounding portion 21 and the second surrounding portion 22 are integrally formed by the same synthetic resin. As described above, the vibration isolation device main body can be accommodated in the through-hole 1A. At this time, the first surrounding portion 21 surrounds the vibration isolation device main body together with the second surrounding portion 22. As shown in FIG. 1, in the present embodiment, the first surrounding portion 21 is an arch-shaped portion that is erected on the second surrounding portion 22. Fig. 1

[0046] In Fig. 2A , the reference sign 20a is a reinforcing member arrangement portion 20a of the surrounding portion 20. The reinforcing member arrangement portion 20a of the surrounding portion 20 is a portion in which the reinforcing member 3 is arranged in the surrounding portion 20. In the present embodiment, the reinforcing member arrangement portion 20a of the surrounding portion 20 is formed by an outer peripheral portion 211 that extends in the surrounding direction, an inner peripheral portion 212 that extends in the surrounding direction, and a linking portion 213 that links the outer peripheral portion 211 and the inner peripheral portion 212 and extends in the surrounding direction.

[0047] Here, the surrounding direction refers to the direction in which the surrounding portion 20 extends around the center axis O1. In the present embodiment, the outer peripheral portion 211, the inner peripheral portion 212, and the linking portion 213 are integrally formed by the same synthetic resin.

[0048] In the reinforcing member 3, the inner surface 32 of the reinforcing member 30 is embedded in the bracket main body 2.

[0049] ​In the present embodiment, the bracket 1 is an injection-molded product with the reinforcing member 3 as an insert. As a specific example, the reinforcing member 3 is disposed in a cavity of a molding die, and the synthetic resin is injected into the cavity to thereby form the bracket main body 2. Thus, the reinforcing member 3 is fixed in a state of being embedded in the bracket main body 2. In the present embodiment, the reinforcing member 3 is fixed in a state where the inner surface 32 of the reinforcing member 3 is embedded on the outer surface side of the surrounding portion 20. In the present embodiment, the inner surface 32 of the reinforcing member 3 is embedded in the bracket main body 2, and the outer surface 33 of the reinforcing member 3 is exposed from the bracket main body 2.

[0050] Fig. 2A is a plan view of the reinforcing member 3. In Fig. 2A , the reinforcing member 30 is shown in a state of being spread flat. In Fig. 2A , the reinforcing member 3 is shown in a manner that the inner surface 32 of the reinforcing member 3 is visually recognized.

[0051] Referring to Fig. 2A , the reinforcing member 3 has a division end surface 31 that divides the reinforcing member 3 into a planar shape. Here, "dividing the reinforcing member 3 into a planar shape" means that the outline shape of the reinforcing member 3 is made into a polygonal shape in a plan view of the reinforcing member 3. In addition, as shown in Fig. 2A , in the present embodiment, the four corners (vertices of the polygonal shape) of the reinforcing member 3 are each formed into a shape having an angle (a shape in which two straight lines intersect at one point) in a plan view, but can be formed into a shape with a rounded corner (a curved shape).

[0052] As shown in Fig. 2A , in the present embodiment, the division end surface 31 of the reinforcing member 3 divides the reinforcing member 3 into a rectangular shape (a planar shape) in a plan view. In the present embodiment, the division end surface 31 of the reinforcing member 3 includes a short-side direction extension end surface 31a that extends in a short-side direction and a long-side direction extension end surface 31b that extends in a long-side direction. In the present embodiment, the division end surface 31 of the reinforcing member 3 includes two short-side direction extension end surfaces 31a. As shown in Fig. 2B , the two short-side direction extension end surfaces 31a extend in the short-side direction in parallel with each other in a plan view. In addition, in the present embodiment, the division end surface 31 of the reinforcing member 3 includes two long-side direction extension end surfaces 31b. As shown in Fig. 2B , the two long-side direction extension end surfaces 31b extend in the long-side direction in parallel with each other in a plan view. Thus, in the present embodiment, the division end surface 31 of the reinforcing member 3 divides the reinforcing member 3 into a rectangular shape in a plan view.

[0053] Fig. 2B The reinforcing member 3 is shown from the short-side direction. In Fig. 2B , the long-side direction extension end surface 31b of the reinforcing member 3 is shown as a front surface.

[0054] At least a portion of the divided end surface 31 of the reinforcing member 3 is an inclined surface 32a formed by the inner surface 32 of the reinforcing member 3 being inclined toward the outer surface 33 of the reinforcing member 3. The inclined surface 32a is inclined toward the outer surface side end edge 3el of the reinforcing member 3 as it goes toward the outer surface 33 of the reinforcing member 31. Here, the "outer surface side end edge 3el of the reinforcing member 3" refers to the end edge of the outer surface 33 of the reinforcing member 3. Also, the "inner surface side end edge 3e2 of the reinforcing member 3" described later refers to the end edge of the inner surface 32 of the reinforcing member 3.

[0055] Referring to Fig. 2B In the present embodiment, the inner surface 32 of the reinforcing member 3 includes the inclined surface 32a. In the present embodiment, the inclined surface 32a extends toward the outer surface 33 as it goes toward the long side direction side of the reinforcing member 31. Also, in the present embodiment, the inclined surface 32a is inclined toward the outer surface side end edge 3el of the reinforcing member 3 as it goes toward the outer surface 33 of the reinforcing member 31.

[0056] Also, referring to Fig. 1 The reinforcing member 3 is a sheet member having a thickness t. The thickness t is the thickness between the inner surface 32 of the reinforcing member 3 and the outer surface 33 of the reinforcing member 3. The inclined surface 32a is formed so that the thickness t of the reinforcing member 3 decreases as it goes toward the outer surface side end edge 3el of the reinforcing member 3. At the outer surface side end edge 3el of the reinforcing member 3, the thickness t of the reinforcing member 3 is t = 0. In the present embodiment, the inclined surface 32a forms the inner surface 32 of the reinforcing member 3 together with a plane 32b that is parallel to the outer surface 33 of the reinforcing member 3. That is, in the present embodiment, the inner surface 32 of the reinforcing member 3 is formed by the inclined surface 32a and the plane 32b. As shown in Fig. 3 In the present embodiment, the inclined surface 32a of the inner surface 32 is a short side direction extending end surface 31a of the reinforcing member 3 when viewed in the short side direction of the reinforcing member 3 (when viewed in the width direction of the reinforcing member 3). Also, in the present embodiment, the outer surface side end edge 3el of the reinforcing member 3 is the outer surface side end edge of the short side direction extending end surface 31a of the reinforcing member 3.

[0057] Referring to Fig. 1 In the present embodiment, the inclined surface 32a of the inner surface 32 is formed by a curved surface that protrudes outward. Also, in the present embodiment, the cross-sectional profile shape of the curved surface is formed by one radius of curvature R. In the present embodiment, the radius of curvature R is larger than the maximum thickness tmax of the reinforcing member 3. In the present embodiment, the maximum thickness tmax is the thickness between the plane 32b in the inner surface 32 of the reinforcing member 3 and the outer surface 33 of the reinforcing member 3.

[0058] Referring to Fig. 1In the bracket 1, the long-side extending end face 31b of the reinforcing member 3 extends in the surrounding direction of the surrounding portion 20. That is, in the bracket 1, the long-side extending end face 31b of the reinforcing member 3 is a surrounding-direction extending end face that extends in the surrounding direction of the surrounding portion 20. Furthermore, referring to… Fig. 1 In the bracket 1, the short-side extending end face 31a of the reinforcing member 3 extends in the axial direction of the surrounding portion 20. That is, in the bracket 1, the short-side extending end face 31a of the reinforcing member 3 is an axially extending end face that extends in the axial direction of the surrounding portion 20.

[0059] like Fig. 4D As shown, the reinforcing member 3 is embedded in the support body 2. When the reinforcing member 3 is embedded in the support body 2, as... Fig. 4D As shown, there is a situation where a boundary is formed between the circumferential end face 31 of the reinforcing member 3 and the surrounding portion 20. In this embodiment, the reinforcing member 3 is embedded in such a way that a boundary is formed between the end face 31a extending in the short side direction of the reinforcing member 3 and the surrounding portion 20 of the support body 2.

[0060] On the other hand, as described above, the vibration isolation device body is connected to the surrounding portion 20 of the support body 2. Therefore, for example, as... Fig. 4C As shown by the hollow arrow, the load (external force) is applied to the surrounding portion 20 of the bracket body 2 from the central axis O1 in the axial direction outward. In this embodiment, as described above, the bracket 1 is an engine mount bracket. Therefore, in this embodiment, the load is mainly applied to the surrounding portion 20 of the bracket body 2 in three axial directions: the front-rear direction, the left-right direction, and the up-down direction when the vehicle is installed. The load applied to the surrounding portion 20 of the bracket body 2 is transmitted to the reinforcing member 3 via the surrounding portion 20. That is, the inner surface 32 of the reinforcing member 3 becomes the surface that directly bears the load from the bracket body 2.

[0061] Therefore, when a large load is transmitted to the reinforcing member 3, the inner surface 32 of the reinforcing member 3 bears the load, which may result in a large stress concentration near the boundary between the dividing end face 31 of the reinforcing member 3 and the surrounding portion 20. Thus, when the reinforcing member 3 is embedded in the support body 2, considering the large stress concentration that may occur at the dividing end face 31 of the reinforcing member 3, there is room for improvement in durability. In this embodiment of the embedded structure of the reinforcing member 3, a boundary between the reinforcing member 3 and the support body 2 is formed between the short-side extending end face 31a of the reinforcing member 3 and the surrounding portion 20. Therefore, in this embodiment of the embedded structure of the reinforcing member 3, it is necessary to reduce the stress concentration that may occur at the short-side extending end face 31a of the reinforcing member 3.

[0062] As a method to reduce stress concentration, it is conceivable to design the dividing end face 31 of the reinforcing member 3 as an inclined surface. For example, as... Fig. 4C As shown, the dividing end face 31 of the reinforcing member 3 can be formed by the outer surface 33 of the reinforcing member 31 that is inclined toward the inner surface 32 of the reinforcing member 3 when viewed along the short side direction of the reinforcing member 3. However, when the inner surface side edge 3e2 of the dividing end face 31 of the reinforcing member 3 becomes an acute angle, as... Fig. 4A As shown, the surface area of ​​the inner surface 32 of the reinforcing member 3 is larger than that of the outer surface 33 of the reinforcing member 3. In this case, when a load is applied to the inner surface 32 of the reinforcing member 3 in the axial direction outward, there is a concern that a large stress concentration may occur at the inner surface edge 3e2 of the dividing end face 31 of the reinforcing member 3.

[0063] On the other hand, such as Fig. 4A As shown, when viewed along the width direction of the reinforcing member 3, if the dividing end face 31 of the reinforcing member 3 is a vertical plane, then the dividing end face 31 of the reinforcing member becomes a shape parallel to the load input on the outer side of the axial direction. In this case, as... Fig. 4A As shown, the surface area of ​​the inner surface 32 of the reinforcing member 3 is the same as the surface area of ​​the outer surface 33 of the reinforcing member 3. However, in this case, the inner surface side edge 3e2 of the dividing end face 31 of the reinforcing member 3 is a right angle. Therefore, there is room for improvement in suppressing the stress concentration generated with respect to the inner surface side edge 3e2 of the dividing end face 31 of the reinforcing member 3.

[0064] In this regard, refer to Fig. 4A In the bracket 1 of this embodiment, at least a portion of the dividing end face 31 of the reinforcing member 3, when viewed along the width direction of the reinforcing member 3, is an inclined surface 32a formed by the inner surface 32 of the reinforcing member 3 that is inclined toward the outer surface 33 of the reinforcing member 3. In this case, when a load is applied to the inner surface 32 of the reinforcing member 3 in the axial direction outward, the load can be released along the inclined surface 32a. As a result, stress concentration that may occur at the dividing end face 31 of the reinforcing member 3 is suppressed. Therefore, the bracket 1 according to this embodiment can improve durability.

[0065] In particular, in this embodiment, as described above, the dividing end face 31 of the reinforcing member 3 includes a short-side-direction-extending end face 31a. In this embodiment, the inclined surface 32a is the short-side-direction-extending end face 31a. Fig. 4BAs shown, in the bracket 1, the short side direction extending end surface 31a of the reinforcing member 3 is an axial direction extending end surface. That is, in the present embodiment, the short side direction extending end surface 31a of the reinforcing member 3 receives a load applied from the outer side in the axial direction in a manner orthogonal to the input direction of the load (the outer side in the axial direction). Therefore, in the bracket 1, if the short side direction extending end surface 31a of the reinforcing member 3 is provided as the inclined surface 32a, stress concentration due to a force applied to the outer side in the axial direction can be effectively suppressed. Thus, according to the present embodiment, the durability can be further improved. In particular, in the present embodiment, the short side direction extending end surface 31a of the reinforcing member 3 is a long side direction end surface of the reinforcing member 3 that is wrapped to the outer surface side of the surrounding portion 20 of the bracket main body 2. In this case, the short side direction extending end surface 31a of the reinforcing member 3 interacts with a restoring force or the like with respect to the wrapping of the reinforcing member 3, and stress concentration is likely to occur when a load is applied from the outer side in the axial direction. Therefore, according to the present embodiment, the durability can be further improved.

[0066] Further, with reference to Fig. 4C , in the present embodiment, the inclined surface 32a of the inner surface 32 is formed by a curved surface that protrudes outward. In this case, the inclined surface 32a is formed by a curved surface, and thus the load applied to the inclined surface 32a can be more efficiently released along the inclined surface 32a. Thus, according to the present embodiment, the durability can be further improved.

[0067] In particular, with reference to Fig. 5 , in the present embodiment, the cross-sectional profile shape of the curved surface, when viewed in the short side direction (long side direction) of the reinforcing member 3, is formed by one radius of curvature R that is larger than the maximum thickness tmax of the reinforcing member 3. In this case, the inclined surface 32a of the inner surface 32 is formed as a curved surface, and the outer surface side end edge 3el toward the inclined surface 32a is gently inclined. Thus, according to the present embodiment, the durability can be further improved.

[0068] Further, according to the present application, the inclined surface 32a of the inner surface 32 can be formed by a flat surface. With reference to Fig. 1 , the cross-sectional profile shape of the inclined surface 32a, when viewed in the short side direction (long side direction) of the reinforcing member 3, is formed by a straight line. In this case, for the inner surface side end edge 3e2 of the divided end surface 31 of the reinforcing member 3, the angle between the divided end surface 31 of the reinforcing member 3 and the inner surface 32 becomes an obtuse angle. In this case, as shown in Fig. 5 , when viewed in the width direction of the reinforcing member 3, stress concentration can be alleviated compared to a case where the divided end surface 31 of the reinforcing member 3 is a perpendicular surface or the like.

[0069] Furthermore, in this embodiment, the dividing end face 31 of the reinforcing member 3 includes a long-side extending end face 31b extending in the long-side direction. When a boundary is formed between the long-side extending end face 31b of the reinforcing member 3 and the support body 2 by embedding the reinforcing member 3, the inclined surface 32a is preferably the long-side extending end face 31b of the reinforcing member 3. When the long-side extending end face 31a of the reinforcing member 3 is embedded in the support body 2, if the long-side extending end face 31b of the reinforcing member 3 is made into an inclined surface 32a, stress concentration generated on the long-side extending end face 31b of the reinforcing member 3 due to the force applied outward in the axial direction can be suppressed. Therefore, in this case, durability can be further improved.

[0070] Fig. 5 yes Fig. 6 AA sectional view. Fig. 5 The reinforcing member configuration portion 20a is shown in a section orthogonal to the surrounding direction. Fig. 6 In this context, the cross-section is an axial cross-section formed by a plane including the central axis O1. Additionally, Fig. 6 yes Fig. 6 Enlarged image.

[0071] Reference Fig. 6 When the reinforcing member configuration portion 20a is observed in a section orthogonal to the surrounding direction, the cross-sectional shape of the reinforcing member configuration portion 20a is an I-shape in which the cross-sectional width W3 of the connecting portion 213 is narrower than the cross-sectional width W1 of the outer peripheral portion 211 and the cross-sectional width W2 of the inner peripheral portion 212.

[0072] Furthermore, in this embodiment, the cross-sectional width W2 of the inner peripheral portion 212 is narrower than the cross-sectional width W1 of the outer peripheral portion 211.

[0073] Among them, reference Fig. 6 "Cross-section width" refers to the width of the cross-section. Fig. 6 Width in the axial direction of the object portion (outer peripheral portion 211, inner peripheral portion 212, and connecting portion 213) extending along the axial direction in the axial sectional view.

[0074] Reference Fig. 6 In this embodiment, the outer peripheral portion 211 has a flat rectangular cross-section along the axial direction in the axial sectional view. The cross-sectional width W1 of the outer peripheral portion 211 is the width between the axial ends e1 of the outer peripheral portion 211. Additionally, referring to... Fig. 1 In this embodiment, the inner peripheral portion 212 has a flat rectangular cross-section along the axial direction in the axial sectional view. The cross-sectional width W2 of the inner peripheral portion 212 is the width between the axial ends e2 of the inner peripheral portion 212. Additionally, referring to... Fig. 7In the present embodiment, the linking portion 213 has a flat rectangular shape in cross section in the axial straight direction. The cross-sectional width W3 of the linking portion 213 is the width between the portions in the axial direction that are closest to each other in the axial end e3 of the linking portion 213.

[0075] Also, in the present embodiment, the side surface f3 of the linking portion 213 includes a curved surface f3a that is continuous with the inner peripheral side surface f1 of the outer peripheral portion 211 and is formed by a curve that is concave inward when viewed in the cross section, and a curved surface f3b that is continuous with the outer peripheral side surface f2 of the inner peripheral portion 212 and is formed by a curve that is concave inward when viewed in the cross section.

[0076] Referring to Fig. 8 In the present embodiment, the inner peripheral side surface f1 of the outer peripheral portion 211 is a flat surface formed by a straight line in the axial cross-sectional view. The inner peripheral side surface f1 of the outer peripheral portion 211 is continuous with the axial end el of the outer peripheral portion 211 at an acute angle side angle a with respect to the axial straight direction. Likewise, in the present embodiment, the outer peripheral side surface f2 of the inner peripheral portion 212 is a flat surface formed by a straight line in the axial cross-sectional view. The outer peripheral side surface f2 of the inner peripheral portion 212 is continuous with the axial end e2 of the inner peripheral portion 212 at an acute angle side angle β with respect to the axial straight direction.

[0077] Also, referring to Fig. 1 In the present embodiment, the curved surface f3a of the linking portion 213 is a curve that is concave inward toward the axial line direction in the axial cross-sectional view, formed by a curve with a radius of curvature r1. Also, in the present embodiment, the curved surface f3b of the linking portion 213 is a curve that is concave inward toward the axial line direction in the axial cross-sectional view, formed by a curve with a radius of curvature r2. The radius of curvature r1 and the radius of curvature r2 can be set to the same radius of curvature. Alternatively, the radius of curvature r1 and the radius of curvature r2 can be set to different radii of curvature.

[0078] Also, in the present embodiment, the inner peripheral side surface f1 of the outer peripheral portion 211, the outer peripheral side surface f2 of the inner peripheral portion 212, and the side surface f3 of the linking portion 213 form a recess 23 that extends in the surrounding direction in the reinforcing member arrangement portion 20a of the surrounding portion 20.

[0079] Referring to Fig. 5In the present embodiment, the recess 23 has two circumferential direction end surfaces 214. The circumferential direction end surfaces 214 are surfaces that form the circumferential direction ends of the recess 23. The circumferential direction end surfaces 214 define the range in which the recess 23 extends in the circumferential direction. The circumferential direction end surfaces 214 are continuous with the inner peripheral side surface fl of the outer peripheral portion 211, the outer peripheral side surface f2 of the inner peripheral portion 212, and the side surface f3 of the linking portion 213, respectively. That is, in the present embodiment, the recess 23 is formed by the outer peripheral portion 211, the inner peripheral portion 212, the linking portion 213, and the circumferential direction end surfaces 214. Also, in the present embodiment, the circumferential direction end surfaces 214 are continuous with the through-hole 1A. Thus, in the present embodiment, the recess 23 is open to the through-hole 1A at the circumferential direction ends.

[0080] In particular, in the present embodiment, in the reinforcing member arrangement portion 20a of the surrounding portion 20, the cross-sectional width W2 of the inner peripheral portion 212 widens as it goes toward the second surrounding portion 22. In the present embodiment, the cross-sectional width W2 becomes the maximum width of the cross-sectional width W2 when it is proximate to the second surrounding portion 22 to a certain distance. Then, the cross-sectional width W2 narrows as it further goes toward the second surrounding portion 22 from the maximum width of the cross-sectional width W2. Referring to Fig. 3 and Fig. 7 In the present embodiment, the axial direction end e2 of the inner peripheral portion 212 is formed by a curve with a radius of curvature r22 in the vicinity of the second surrounding portion 22, as shown in the perspective view of

[0081] The reinforcing member arrangement portion 20a of the surrounding portion 20 is reinforced by arranging the reinforcing member 3. The reinforcing member 3 is formed of fiber-reinforced plastic (FRP).

[0082] (Fiber-reinforced plastic) is a composite material in which a fiber-like element is contained in a synthetic resin to increase strength. As the fiber-reinforced plastic, for example, a prepreg can be cited. As the fiber-like element, for example, a glass fiber fabric, a carbon fiber fabric, a metal fiber fabric, an organic fiber, a fiber fabric having a higher bending strength than the bending strength of the stent body 2, other materials containing these fabrics can be cited. It is preferable to use a glass fiber fabric as the fiber-like element. Also, as the fiber-reinforced plastic, for example, a UD (Uni Direction) material in which a fiber-like element having directionality is contained in a synthetic resin, a fabric material in which a woven fiber-like element is contained in a synthetic resin can be cited. The stent 1 can be integrally formed by injection molding with the reinforcing member 3 as an insert, for example. In the stent 1 of the present embodiment, for example, the fiber-like element is arranged in an orientation directed in the circumferential direction.

[0083] Referring to Fig. 7 The reinforcing member 3 extends in the circumferential direction of the surrounding portion 20 and is arranged in the surrounding portion 20.

[0084] In the present embodiment, the reinforcing member 3 is arranged at the first surrounding portion 21. The reinforcing member 3 is a reinforcing member in a band shape. Referring to Fig. 9 In the present embodiment, the cross-sectional width of the reinforcing member 3 is equal to the cross-sectional width W1 of the outer peripheral portion 211. In detail, the long edge direction extending end face 31b of the reinforcing member 3 coincides with the axial direction end e1 of the outer peripheral portion 211.

[0085] Referring to Fig. 10 In the present embodiment, two fixing holes 22h are formed at the second surrounding portion 22. As Fig. 5 illustrated, the two fixing holes 22h are arranged so as to be spaced apart in the axial direction across the first surrounding portion 21 in plan view. In the present embodiment, the fixing holes 22h are arranged at the recesses 2c provided at the support body 2. The recesses 2c are shapes in which a portion of the first surrounding portion 21 is cut away.

[0086] Further, referring to Fig. 6 In the present embodiment, the reinforcing member 3 is arranged so as to uniformly reinforce the vehicle mounting time front direction portion and the vehicle mounting time rear direction portion of the member arrangement portion 20a across the center axis O1 at the time of vehicle mounting. However, the portion reinforced by the reinforcing member 3 can be made different in the vehicle mounting time front-rear direction.

[0087] Further, in the present embodiment, the reinforcing member 3 is arranged at the outer peripheral portion 211 of the reinforcing member arrangement portion 20a of the surrounding portion 20 of the support body 2.

[0088] Referring to Fig. 6 and Fig. 11 In the present embodiment, the reinforcing member 3 covers the outer peripheral surface of the outer peripheral portion 211 of the reinforcing member arrangement portion 20a of the surrounding portion 20 of the support body 2. Thus, in the present embodiment, the reinforcing member 3 forms the outer peripheral surface of the support 1 at the reinforcing member arrangement portion 20a of the support body 2.

[0089] In such a vibration isolation device support, the vibration isolation device body is housed in the through hole 1A formed by the surrounding portion 20. Therefore, stress is easily concentrated at the surrounding portion 20.

[0090] In this regard, as a conventional vibration isolation device support, there is a structure in which a reinforcing member formed of fiber reinforced plastic is fixed to the outer peripheral portion of the surrounding portion of a support body formed of synthetic resin, with the aim of achieving both light weight and durability improvement.

[0091] However, in the aforementioned conventional vibration isolation device brackets, the cross-sectional shape of the surrounding portion is rectangular when viewed in a section orthogonal to the surrounding direction. Therefore, in the aforementioned conventional vibration isolation device brackets, there is room for improvement in terms of further reducing weight and ensuring durability, or in other words, in terms of further improving durability without increasing weight.

[0092] In response, stent 1, as Fig. 12 As shown, in the surrounding portion 20 of the support body 2, the reinforcing member configuration portion 20a of the surrounding portion 20 is formed by the following portions: an outer peripheral portion 211 that extends in the surrounding direction; an inner peripheral portion 212 that extends in the surrounding direction; and a connecting portion 213 that connects the outer peripheral portion 211 and the inner peripheral portion 212 and extends in the surrounding direction.

[0093] Furthermore, for the main body 2 of the support, such as Fig. 13 As shown, when the reinforcing member arrangement portion 20a is viewed in a section orthogonal to the surrounding direction, the cross-sectional shape of the reinforcing member arrangement portion 20a is set to an "I" shape, where the cross-sectional width W3 of the connecting portion 213 is narrower than the cross-sectional width W1 of the outer peripheral portion 211 and the cross-sectional width W2 of the inner peripheral portion 212. In other words, for the support 1, the cross-sectional shape of the reinforcing member arrangement portion 20a of the surrounding portion 20 of the support body 2 is set to the shape of a rail, such as a tram track.

[0094] According to bracket 1, the cross-sectional shape of the reinforcing member configuration portion 20a is set to an I-shape, thereby achieving further weight reduction and ensuring durability. In other words, according to bracket 1, further improvement in durability can be achieved without increasing weight.

[0095] Furthermore, in the bracket 1, the cross-sectional width W2 of the inner peripheral portion 212 is narrower than the cross-sectional width W1 of the outer peripheral portion 211. In this case, it is possible to further reduce weight in accordance with narrowing the cross-sectional width W2 of the inner peripheral portion 212.

[0096] Furthermore, in the bracket 1, the side surface f3 of the connecting portion 213 includes a curved surface f3a formed by an inwardly concave curve and a curved surface f3b formed by an inwardly concave curve. In this case, when an input load is applied, stress concentration generated in the bracket body 2 can be reduced, thereby improving durability.

[0097] Furthermore, in the bracket 1, the inner peripheral side surface f1 of the outer peripheral portion 211, the outer peripheral side surface f2 of the inner peripheral portion 212, and the side surface f3 of the connecting portion 213 form a recess 23 extending in the surrounding direction in the reinforcing member arrangement portion 20a of the surrounding portion 20. In this case, manufacturing quality can be easily ensured.

[0098] If a thickening portion such as a rib for reinforcement is provided to the surrounding portion 20, the surrounding portion 20 can be reinforced.

[0099] However, in the case where the thickening portion is provided to the surrounding portion 20, at the time of injection molding, the resin flow is likely to cause merging and separation of the resin flow, and the like. Thus, in this case, it is necessary to perform suppression of a weld line that can be generated in the product or control for making it unnoticeable, or the like, and it is difficult to secure the manufacturing quality.

[0100] In this regard, in the bracket 1, the recessed portion 23 is formed by the inner peripheral side surface fl of the outer peripheral portion 211, the outer peripheral side surface f2 of the inner peripheral portion 212, and the side surface f3 of the connecting portion 213, and the thickening portion is not present. In this case, the area of the inner peripheral portion 212 side that receives the load from the vibration isolation device main body can be secured, and the area of the outer peripheral portion 211 side where stress is generated is increased, and the cross-sectional area of the connecting portion 213 is reduced. Thus, it is possible to pursue the lightweight of the product (without excess material), and to homogenize the resin flow at the time of injection molding of the bracket 1, and to easily apply the reinforcing member 3. Thus, according to the bracket 1, it is possible to easily secure the manufacturing quality.

[0101] In addition, the bracket 1 can be configured to have a gate mark G of injection molding on the inner peripheral side surface fl of the outer peripheral portion 211. In this case, it is possible to firmly fix the reinforcing member 3 to the bracket main body 2 without impairing the appearance.

[0102] As a molding method of the bracket 1, for example, a so-called hybrid molding in which the reinforcing member 3 is injection molded together with the bracket main body 2 as an insert can be cited.

[0103] However, in such a hybrid molding, synthetic resin supplied into a mold sometimes spreads to the outer peripheral surface side of the reinforcing member 3 unexpectedly. Such spreading of the synthetic resin sometimes impairs the appearance of the outer peripheral surface of the reinforcing member 3 at the time of completion of the product. On the other hand, in order to prevent the spreading of the synthetic resin, it is conceivable to arrange a gate for injection molding at a position farther from the reinforcing member 3 in the mold. However, in this case, the synthetic resin is injected from a position farther from the reinforcing member 3 in the mold, and sometimes the pressure for making the synthetic resin adhere to the reinforcing member 3 becomes insufficient.

[0104] In this regard, for example, with reference to Fig. 1In the bracket 1, the gate mark G is formed in the outer peripheral portion 211 in the inner peripheral side surface f1 of the bracket main body 2. In other words, in a case where the bracket 1 is injection molded with the reinforcing member 3 as an insert with the bracket main body 2, the synthetic resin in the mold is supplied from the inner peripheral surface of the reinforcing member 3. In this way, if the synthetic resin is supplied from the inner peripheral surface of the reinforcing member 3, the spread of the resin to the outer peripheral surface of the reinforcing member 3 can be suppressed. In this case, the synthetic resin is injected from a position closer to the reinforcing member 3 in the mold, and thus the pressure for making the synthetic resin adhere to the reinforcing member 3 can be increased.

[0105] In particular, in the bracket 1, the gate mark G is formed in a region of the outer peripheral portion 211 including the axial corner portion 2e. The axial corner portion 2e of the outer peripheral portion 211 is a portion where the axial end e1 of the outer peripheral portion 211 is connected to the inner peripheral side surface f1. In other words, the synthetic resin in the mold is supplied from the inner peripheral surface side of the reinforcing member 3 in the vicinity of the axial end 3e3 of the reinforcing member 3. In this case, the synthetic resin is supplied in a manner to hold the axial end 3e3 of the reinforcing member 3 against the mold with a certain input angle (an acute angle of more than 0 degrees other than 90 degrees). Thus, the spread of the resin to the outer peripheral surface of the reinforcing member 3 can be effectively suppressed.

[0106] Furthermore, in the bracket 1, the gate mark G extends from the axial corner portion 2e of the outer peripheral portion 211 along the axial end e1 to the boundary between the bracket main body 2 and the reinforcing member 3 (the outer peripheral surface 2f of the outer peripheral portion 211 (bracket main body 2)). In other words, the synthetic resin in the mold is supplied to the inner peripheral surface of the reinforcing member 3 at a position closest to the axial end 3e3 of the reinforcing member 3 in a manner to hold the axial end 3e3 of the reinforcing member 3 against the mold with a certain input angle (an acute angle of more than 0 degrees other than 90 degrees). In this case, the synthetic resin is injected from the inner peripheral side of the outer peripheral portion 211 closest to the reinforcing member 3, and thus the spread of the resin to the outer peripheral surface of the reinforcing member 3 can be further suppressed.

[0107] Further, with reference to Fig. 13 and Fig. 13 , the gate mark G is formed on both axial sides. However, the gate mark G can be formed on at least one of the axial one side and the axial other side. In the present embodiment, the gate mark G is formed on both the left-right direction sides when the bracket is mounted on a vehicle. Further, the gate mark G is formed with one on each of the axial one side and the axial other side. However, the gate mark G can be provided with at least one on at least one of the axial one side and the axial other side. In the present embodiment, the gate mark G is formed with one on each of the left-right direction sides when the bracket is mounted on a vehicle in the rear direction when the bracket is mounted on a vehicle. Further, Fig. 1 is a perspective view of the A-A cross section of Fig. 8 from the right front top surface side. According to Explanation of Reference Numerals , the A-A cross section of FIG. 2 is as shown in​ Thus, no gate marks G.

[0108] The above merely illustrates one embodiment of the present application, and various modifications can be made in accordance with the claims. For example, the form (shape) of the surrounding portion 20 is not limited to that of the above-described embodiment. In addition, the portion of the reinforcing member 3 that is embedded in the support body 2 is not limited to the surrounding portion 20 formed so as to surround the through-hole 1A. The reinforcing member 3 can be embedded in a portion in which both end portions are not connected, such as a U-shaped portion or an I-shaped portion, without surrounding the through-hole.

[0109] For example, the surrounding portion 20 is elliptical in shape when viewed in the axial direction, but can be circular, rectangular, or the like. In addition, with reference to ​ In the present embodiment, the outer peripheral surface of the reinforcing member 3 coincides with the outer surface of the surrounding portion 20 of the support body 2, but the outer peripheral surface of the reinforcing member 3 can be made to protrude outward with respect to the outer surface of the surrounding portion 20 so as to provide a step between the outer peripheral surface of the reinforcing member 3 and the outer surface of the surrounding portion 20. In addition, the reinforcing member 3 is embedded in the surrounding portion 20 of the support body 2 as the outer peripheral surface of the support 1 in a manner that is visually recognizable from the outside, but can be completely embedded in the surrounding portion 20 in a manner that is not visually recognizable from the outside. In addition, with reference to ​ The mounting surface of the second surrounding portion 22 is formed by a flat surface. However, the mounting surface of the second surrounding portion 22 can be formed by a surface having a shape corresponding to the shape of the mounting side of the vehicle body or the like.

[0110] ​

[0111] 1, support for vibration isolation device; 1A, through-hole; 2, support body; 20, surrounding portion; 20a, reinforcing member arrangement portion; 21, first surrounding portion; 211, outer peripheral portion; 212, inner peripheral portion; 213, connecting portion; 22, second surrounding portion; 23, recessed portion; 3, reinforcing member; 31, partitioned end surface of reinforcing member; 31a, short edge direction extension end surface of reinforcing member (axial direction extension end surface of reinforcing member); 31b, long edge direction extension end surface of reinforcing member (surrounding direction extension end surface of reinforcing member); 32, inner surface of reinforcing member; 32a, inclined surface of inner surface of reinforcing member (partitioned end surface of reinforcing member); 32b, flat surface of inner surface of reinforcing member; 33, outer surface of reinforcing member; 3el, outer surface side end edge of reinforcing member; 3e2, inner surface side end edge of reinforcing member; fl, inner peripheral side surface of outer peripheral portion;

[0112] f2, outer peripheral side surface of the inner peripheral portion; f3, side surface of the connecting portion; f3a, curved surface connected to the inner peripheral side surface of the outer peripheral portion and concave inward; f3b, curved surface connected to the outer peripheral side surface of the inner peripheral portion and concave inward; G, gate mark; O1, center axis.

Claims

1. A support for a vibration isolation device, which has a support main body formed of synthetic resin and a reinforcing member formed of fiber-reinforced plastic, in which an inner surface of the reinforcing member is embedded in the support main body, in the support for a vibration isolation device, the reinforcing member has a division end surface that divides the reinforcing member into a planar shape, at least a part of the division end surface of the reinforcing member is an inclined surface formed by an inner surface of the reinforcing member that is inclined toward an outer surface of the reinforcing member.

2. The support for a vibration isolation device according to claim 1, wherein the inclined surface is formed by a curved surface that protrudes outward.

3. The support for a vibration isolation device according to claim 2, wherein a cross-sectional profile shape of the curved surface is formed by one radius of curvature, and the radius of curvature is larger than a maximum thickness of the reinforcing member.

4. The support for a vibration isolation device according to any one of claims 1 to 3, wherein the division end surface of the reinforcing member includes a short-side direction extension end surface that extends in a short-side direction, and the at least a part of the division end surface of the reinforcing member is the short-side direction extension end surface.

5. The support for a vibration isolation device according to claim 1, wherein the division end surface of the reinforcing member includes a long-side direction extension end surface that extends in a long-side direction, and the at least a part of the division end surface of the reinforcing member is the long-side direction extension end surface.

6. The support for a vibration isolation device according to claim 1, wherein the inclined surface is formed by a flat surface.

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