Vibration-damping components for vehicle support parts

Abstract

To provide a vibrationproof member of a support component of a vehicle which can improve durability.SOLUTION: A vibrationproof member 50 of a torque rod 33 supporting a unit 20 is given in a vehicle body 11. The torque rod 33 includes: an outer metal fitting 41 in which the unit 20 is fixed to one side thereof and an aperture 41B where the vibrationproof member 50 is fitted in is formed at the rear side; and an inner cylinder metal fitting 42 which is arranged in the vibrationproof member 50 and fixed to the vehicle body 11. The vibrationproof member 50 includes: an extendable part 52 which at least connects the inner cylinder metal fitting 42 with the outer metal fitting 41 so that motion amount of the unit 20 relative to the vehicle body 11 is absorbed by expansion and contraction; and a thin film part 53 which is formed at the time of molding for release air of a metal mold 90 and formed contiguously to the extendable part 52 along the expanding and contracting direction of the extendable part 52. The thin film part 53 has an aperture 53C to form a marginal part 53E with a prescribed width at a lateral face of a fragile site 52A of the extendable part 52.SELECTED DRAWING: Figure 3

Description

Technical Field

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[0001] The present invention relates to a vibration isolation member for a support component that supports a unit in a vehicle body.

Background Art

[0002] A support component (mount) supports a unit in a vehicle body. For example, an engine mount supports an engine in a vehicle body and also dampens and isolates vibrations of the engine. For example, Patent Document 1 discloses a vibration isolation member for an engine mount, which is formed of an elastic body such as rubber.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0004] 「Conventional Vibration Isolation Member」 The conventional vibration isolation member 150 will be described using FIGS. 17 to 20.

[0005] As shown in FIG. 17, the conventional vibration isolation member 150 is provided, for example, on a torque rod 133 as a support component that supports a unit in a vehicle body. The torque rod 133 has an outer fitting 141 fixed to the unit, an inner cylinder fitting 142 fixed to the vehicle body, and a vibration isolation member​​​​​​ As shown in Figure 18, for example, when manufacturing the vibration-damping member 150 by injection molding, rubber is introduced and filled from the gate 191 above the mold 190 (steps S111 and S112). As a result, air remains above the mold 190 (step S113), so the rubber is overfilled and the air is vented from the air vent section 192 to eliminate the remaining air and ensure there are no gaps in the material (step S114). The portion formed by this air vent section 192 becomes the thin film portion 153.

[0008] As shown in Figure 19, in the vibration-damping member 150, the expandable portion 152 expands and contracts due to the acceleration and deceleration of the vehicle, and the thin film portion 153 also expands and contracts in accordance with the expandable portion 152. The thin film portion 153 will eventually break if repeated expansion and contraction occurs. If the break in the thin film portion 153 is repeated further, the tear may reach the side of the expandable portion 152. Note that in Figure 19, the outer fitting 141 is partially omitted for clarity of explanation.

[0009] As shown in Figure 20(A), when the vehicle accelerates with the tear in the thin film portion 153 reaching the side of the expandable portion 152, the thin film portion 153 on the outer fitting 141 side is pulled, and the load is concentrated at the point P where the tear in the thin film portion 153 reaches the side of the expandable portion 152, causing the point P to deteriorate faster than other parts. On the other hand, as shown in Figure 20(B), when the vehicle decelerates, the thin film portion 153 on the inner cylinder fitting 142 side is pulled, and similarly the load is concentrated at the point P, causing the point P to deteriorate faster than other parts.

[0010] In other words, if the thin film portion 153 formed as excess material during the molding of the vibration-damping member 150 breaks and the break reaches the expandable portion 152, the load will concentrate at the point where it reaches P, causing the point where it reaches P to deteriorate faster than other parts, thus reducing the durability of the vibration-damping member 150. [Overview of the project] [Problems that the invention aims to solve]

[0011] Therefore, the present invention aims to provide a vibration-damping member for vehicle support components that can improve durability. [Means for solving the problem]

[0012] The vibration-damping member according to the present invention is a vibration-damping member for a support component that supports a unit in a vehicle body, wherein the support component has an outer fitting to which either the unit or the vehicle body is fixed on one side and an opening formed on the other side into which the vibration-damping member is fitted, and an inner cylinder fitting provided on the vibration-damping member and fixed to the other side of the unit or the vehicle body, wherein the vibration-damping member has at least an expandable portion that connects the inner cylinder fitting and the outer fitting and absorbs the relative amount of movement of the unit with respect to the vehicle body by expanding and contracting, and a thin film portion formed to vent air from the mold during molding and formed continuously with the expandable portion along the expansion and contraction direction, wherein the thin film portion has an opening formed such that an edge of a predetermined width is formed on the side surface of the weak part of the expandable portion.

[0013] The vibration-damping member according to the present invention is a vibration-damping member for a support component that supports a unit in a vehicle body, wherein the support component has an outer fitting to which either the unit or the vehicle body is fixed on one side and an opening formed on the other side into which the vibration-damping member is fitted, and an inner cylinder fitting provided on the vibration-damping member and fixed to the other side of the unit or the vehicle body, wherein the vibration-damping member has at least an expandable portion that connects the inner cylinder fitting and the outer fitting and absorbs the relative amount of movement of the unit with respect to the vehicle body by expanding and contracting, and a thin film portion formed to vent air from the mold during molding and formed continuously with the expandable portion along the expansion and contraction direction, wherein the thin film portion has an opening formed such that the thin film portion is not formed on the side surface of the weak part of the expandable portion.

[0014] The vibration-damping member according to the present invention is a vibration-damping member for a support component that supports a unit in a vehicle body, wherein the support component has an outer fitting to which either the unit or the vehicle body is fixed on one side and an opening formed on the other side into which the vibration-damping member is fitted, and an inner cylinder fitting provided on the vibration-damping member and fixed to the other side of the unit or the vehicle body, wherein the vibration-damping member has at least an expandable portion that connects the inner cylinder fitting and the outer fitting and absorbs the relative amount of movement of the unit with respect to the vehicle body by expanding and contracting, and a thin film portion formed to vent air from the mold during molding and formed continuously with the expandable portion along the expansion and contraction direction, wherein the thin film portion has convex portions, concave portions or a plurality of holes formed at predetermined intervals from the side surface of the weak portion of the expandable portion.

[0015] In the vibration-damping member according to the present invention, it is preferable that the thin film portion is formed above the central portion in the vertical direction of the vehicle relative to the expandable portion. [Effects of the Invention]

[0016] The vibration-damping member for vehicle support components of the present invention can improve durability. [Brief explanation of the drawing]

[0017] [Figure 1] This is a perspective view showing the support structure of a vehicle unit according to the embodiment. [Figure 2] This is a plan view showing a support component according to an embodiment. [Figure 3] This is a plan view showing a vibration-damping member, which is an example of the first embodiment. [Figure 4] This is a schematic diagram showing part of the manufacturing process for vibration-damping components. [Figure 5] This is a plan view showing the effect of the vibration-damping material. [Figure 6] This is a plan view showing a vibration-damping member, which is another example of the first embodiment. [Figure 7] This is a plan view showing a vibration-damping member, which is another example of the first embodiment. [Figure 8] This is a perspective view showing a vibration-damping member, which is another example of the first embodiment. [Figure 9] It is a schematic diagram showing a part of the manufacturing process of the vibration isolation member of FIG. 8. [Figure 10] It is a plan view showing a vibration isolation member which is an example of the second embodiment. [Figure 11] It is a plan view showing the effect of the vibration isolation member. [Figure 12] It is a plan view showing a vibration isolation member which is another example of the second embodiment. [Figure 13] It is a perspective view showing a vibration isolation member which is an example of the third embodiment. [Figure 14] It is a perspective view showing the effect of the vibration isolation member. [Figure 15] It is a perspective view showing a vibration isolation member which is another example of the third embodiment. [Figure 16] It is a perspective view showing a vibration isolation member which is another example of the third embodiment. [Figure 17] It is a plan view showing a conventional support part. [Figure 18] It is a schematic diagram showing a part of the manufacturing process of a conventional vibration isolation member. [Figure 19] It is a perspective view showing the state leading to the breakage of a conventional vibration isolation member. [Figure 20] It is a plan view showing the state leading to the deterioration of a conventional vibration isolation member.

Mode for Carrying Out the Invention

[0018] Hereinafter, an example of an embodiment of the present invention will be described in detail. In the following description, specific shapes, materials, directions, numerical values, etc. are examples for facilitating the understanding of the present invention, and can be appropriately changed according to applications, purposes, specifications, etc.

[0019] "Support Structure of Vehicle Unit" [[ID=4〗]Using FIG. 1, the support structure of the unit 20 of the vehicle 10 according to the embodiment will be described.

[0020] In the support structure of the unit 20 of the vehicle 10, the unit 20 is supported by a support component 30 on the vehicle body 11. The torque rod 33, which serves as the support component 30, has a vibration-damping member 50, which will be described later (see Figure 2). The vibration-damping member 50 of the torque rod 33 of the vehicle 10 can improve durability, as will be described in detail later.

[0021] Vehicle 10 is, for example, a four-wheeled engine vehicle. However, the vehicle is not limited to an engine vehicle; it may also be an electric vehicle or a hybrid vehicle. Furthermore, the following description will refer to the upper or lower side in the vertical direction of the vehicle, the left or right side in the width direction of the vehicle, and the front or rear side in the longitudinal direction of the vehicle, as appropriate.

[0022] Unit 20 is a heavy object mounted on the vehicle body 11. Unit 20 is mounted, for example, on the front of the vehicle body 11. However, unit 20 may also be mounted on the rear or side of the vehicle body 11. Unit 20 is, for example, an engine for driving the vehicle 10. However, unit 20 may also be an electric motor or a battery.

[0023] The support component 30 includes an RH mount 31 and an LH mount 32, respectively, provided on the front side member frame 12, which is a skeletal member, and an RR mount (hereinafter referred to as a torque rod) 33, provided on the suspension member 13, which is a skeletal member of the suspension. The RH mount 31 and the LH mount 32 support the left and right sides of the unit 20, respectively. The torque rod 33 supports the rear of the unit 20.

[0024] In this embodiment, the unit 20 is supported at three points on the vehicle body 11, but the embodiment is not limited to this. For example, a four-point support configuration may be used, in which a mount is added to the front of the unit 20 in addition to the three-point support configuration.

[0025] "Support parts" The torque rod 33, which serves as a support component 30 according to the embodiment, will be described using Figure 2.

[0026] As described above, the torque rod 33 supports the rear of the unit 20 in the suspension member 13 (see Figure 1). The torque rod 33 has an outer fitting 41, an inner cylindrical fitting 42, and a vibration-damping member 50, which will be described in detail later.

[0027] The outer fitting 41 is formed in an elongated shape along the front-rear direction of the vehicle and is made of aluminum, iron, or the like. The front of the outer fitting 41 has multiple fixing holes 41A, which are fastened to the unit 20 by bolts or other fasteners. The rear of the outer fitting 41 has a circular opening 41B into which the vibration-damping member 50 is fitted.

[0028] The inner cylinder fitting 42 is formed, for example, in a roughly triangular shape and is made of aluminum, iron, or the like. The inner cylinder fitting 42 is provided, for example, on the stopper portion 51 of the vibration-damping member 50, which will be described later (see Figure 3). A fixing hole 42A is formed in the center of the inner cylinder fitting 42 for fastening to the suspension member 13 with fasteners such as bolts.

[0029] The vibration-damping member 50 is fixed to the opening 41B of the outer fitting 41. An inner cylinder fitting 42 is also fixed to the approximate center of the vibration-damping member 50. Further details about the vibration-damping member 50 will be described later. Although the vibration-damping member 50 is provided on the torque rod 33, it may also be provided on the RH mount 31 or the LH mount 32.

[0030] In this embodiment, the torque rod 33 is configured such that the outer fitting 41 is fixed to the unit 20 and the inner cylinder fitting 42 is fixed to the vehicle body 11. However, it may also be configured such that the outer fitting 41 is fixed to the vehicle body 11 and the inner cylinder fitting 42 is fixed to the unit 20.

[0031] "Vibration-damping member of the first embodiment" An example of a vibration-damping member 50 in the first embodiment will be described using Figures 3 to 5.

[0032] As shown in Figure 3, the vibration-damping member 50 is provided on the torque rod 33 as described above (see Figure 2) and is made of an elastic material such as rubber. As will be described in detail later, openings 53C and 53D are formed in the thin film portion 53 of the vibration-damping member 50 during the molding process, so that the fracture of the thin film portion 53 is limited to the openings 53C and 53D, and the fracture does not reach the weak portion 52A of the expandable portion 52.

[0033] The vibration-damping member 50 includes a stopper portion 51 formed around the inner cylinder fitting 42, for example, so that the inner cylinder fitting 142 and the outer fitting 141 do not come into direct contact; an expandable portion 52 that connects the inner cylinder fitting 142 and the outer fitting 141 and absorbs the relative amount of movement of the unit 20 with respect to the suspension member 13 by expanding and contracting; and a thin film portion 53 that is formed to vent air from the mold 90 (see Figure 4) during molding and is formed continuously with the expandable portion 52 along the direction of expansion and contraction of the expandable portion 52.

[0034] The stopper portion 51 is formed around the inner cylinder fitting 42 so that the inner cylinder fitting 142 and the outer fitting 141 do not come into direct contact. The stopper portion 51 prevents the inner cylinder fitting 142 and the outer fitting 141 from coming into direct contact and being damaged or generating abnormal noise. The stopper portion 51 is also the part that moves together with the inner cylinder fitting 42 (unit 20) relative to the outer fitting 41 (suspension member 13) as the vehicle 10 accelerates and decelerates.

[0035] The telescopic portion 52 is fixed to the inner cylinder fitting 42 and the outer fitting 41, respectively, and is the part that connects the inner cylinder fitting 42 and the outer fitting 41. The telescopic portion 52 is formed to expand outward toward the rear from the stopper portion 51. The telescopic portion 52 is also the part that absorbs the relative amount of movement of the unit 20 with respect to the suspension member 13 by expanding and contracting due to the acceleration and deceleration of the vehicle 10. The telescopic portion 52 has a weak point 52A.

[0036] The weak points 52A are areas in the expandable section 52 where deterioration progresses rapidly due to repeated expansion and contraction of the expandable section 52. The weak points 52A include the narrow portion of the expandable section 52 and the portion with a large curvature on the side when viewed from the vertical direction of the vehicle.

[0037] As shown in Figure 4, the thin film portion 53 is a part formed to vent air from the mold 90 during molding. For example, when manufacturing a vibration-damping member 50 by rubber injection molding, rubber is introduced and filled from the gate 91 above the mold 90 (steps S11 and S12), and air remains above the mold 90 (step S13). Therefore, the rubber is overfilled and the air is vented from the air vent portion 92 to eliminate the remaining air and ensure there are no gaps in the material (step S14). The portion formed by this air vent portion 92 becomes the thin film portion 53.

[0038] Again, as shown in Figure 3, the thin film portion 53 is formed in the vibration-damping member 50 approximately in the center of the vehicle in the vertical direction, along the vehicle's longitudinal direction. The thin film portion 53 has a front thin film portion 53A formed at the front and a rear thin film portion 53B formed at the rear. The front thin film portion 53A and the rear thin film portion 53B are separated in the vehicle's longitudinal direction by a stopper portion 51 and an expandable portion 52.

[0039] In the front thin film portion 53A, openings 53C are formed on both the left and right sides, which are formed in advance during molding. An edge portion 53E of a predetermined width is formed on the edges of the openings 53C, which are the sides of the weak portion 52A of the expandable portion 52. In addition, an opening 53D is formed in the rear thin film portion 53B, which is formed in advance during molding. An edge portion 53F of a predetermined width is formed on the edges of the openings 53D, which are the sides of the weak portion 52A of the expandable portion 52.

[0040] In this embodiment, an opening 53C is formed in the front thin film portion 53A and an opening 53D is formed in the rear thin film portion 53B. However, the opening 53C may be formed only in the front thin film portion 53A, or the opening 53D may be formed only in the rear thin film portion 53B.

[0041] As shown in Figure 5(A), in the vibration-damping member 50, the expandable portion 52 expands and contracts due to the acceleration of the vehicle 10, and the front thin film portion 53A also expands and contracts in accordance with the expandable portion 52. The front thin film portion 53A will eventually break if the expansion and contraction is repeated. If the break in the front thin film portion 53A is further expanded and contracted, it may reach the opening 53C. Subsequently, if the expansion and contraction is further repeated, the end of the opening 53C in the vehicle width direction will break.

[0042] On the other hand, Figure 5(B) shows the state in which the crack progresses due to the deceleration of the vehicle 10. The progression of the crack is almost the same as in the case of acceleration. Note that Figures 5(A) and 5(B) show the case in which the front thin film portion 53A breaks, but the same is true when the rear thin film portion 53B breaks.

[0043] In the configuration described above, since an opening 53C is formed in the front thin film portion 53A, even if the front thin film portion 53A breaks, once the break reaches the opening 53C, the break will not progress further. In other words, the break is less likely to reach the predetermined width edge portion 53E formed on the side surface of the weak portion 52A. Therefore, the load is less likely to concentrate on the weak portion 52A. This prevents deterioration of the weak portion 52A of the expandable portion 52 due to the breakage of the thin film portion 53. As a result, the durability of the vibration-damping member 50 can be improved.

[0044] "Another example of a vibration-damping member according to the first embodiment" Figures 6 to 9 illustrate another example of the vibration-damping member 50 of the first embodiment. In the following description, members similar to the vibration-damping member 50 described above will be referred to using the same reference numerals.

[0045] As shown in Figure 6, an edge 53E of a predetermined width may be formed around the entire circumference of the side surface of the expandable portion 52, which is the edge of the opening 53C. Alternatively, an edge 53F of a predetermined width may be formed around the entire circumference of the side surface of the expandable portion 52, which is the edge of the opening 53D. This provides the same effect as the vibration-damping member 50 described above.

[0046] In this embodiment, an opening 53C is formed in the front thin film portion 53A and an opening 53D is formed in the rear thin film portion 53B. However, the opening 53C may be formed only in the front thin film portion 53A, or the opening 53D may be formed only in the rear thin film portion 53B.

[0047] As shown in Figure 7, an edge 53E of a predetermined width may be formed along the entire circumference of the front thin film portion 53A at the edge of the opening 53C. Alternatively, an edge 53F of a predetermined width may be formed along the entire circumference of the rear thin film portion 53B at the edge of the opening 53D. This provides the same effect as the vibration-damping member 50 described above.

[0048] In this embodiment, an opening 53C is formed in the front thin film portion 53A and an opening 53D is formed in the rear thin film portion 53B. However, the opening 53C may be formed only in the front thin film portion 53A, or the opening 53D may be formed only in the rear thin film portion 53B.

[0049] As shown in Figure 8, the thin film portion 53 is preferably formed on the upper part of the vibration-damping member 50 in the vehicle's vertical direction. More preferably, the thin film portion 53 is preferably formed on the upper end of the vibration-damping member 50 in the vehicle's vertical direction.

[0050] As shown in Figure 9, in order to mold the vibration-damping member 50 in which the thin film portion 53 described above is formed at the upper end, it is preferable that the air vent portion 92 be provided continuously with the upper surface of the mold 90 (the surface on which the gate 91 is provided).

[0051] Here, in order to push the air accumulated at the top of the mold 90 out to the air vent 92, it is necessary to fill the mold 90 with rubber under high pressure when overfilling it from the gate 91 (step S13 described above (see Figure 4)). For example, if the air vent 92 is located at the bottom of the mold 90, the filling pressure needs to be increased even further.

[0052] Therefore, as in this embodiment, by providing the air vent section 92 in a configuration that is continuous with the upper surface of the mold 90, it is not necessary to apply excessively high pressure when pushing the air accumulated on the upper part of the mold 90 to the air vent section 92.

[0053] "Vibration-isolating member of the second embodiment" An example of a vibration-damping member 60 in the second embodiment will be described using Figures 10 to 11.

[0054] As will be described in detail later, the vibration-damping member 60 has openings 63C and 63D formed in the thin film portion 63 during molding, so that the fracture of the thin film portion 63 only progresses to the openings 63C and 63D, and the fracture does not reach the weak portion 62A of the expandable portion 62.

[0055] Unless otherwise specified, each component of the vibration-damping member 60 has the same configuration as the corresponding components of the vibration-damping member 50 described above. As shown in Figure 10, the vibration-damping member 60 has a stopper portion 61, an expandable portion 62, and a thin film portion 63. The expandable portion 62 has a fragile portion 62A. The thin film portion 63 has a front thin film portion 63A and a rear thin film portion 63B.

[0056] The front thin film portion 63A has openings 63C formed on the left and right sides during molding. The front thin film portion 63A is not formed on the edges of the openings 63C, which are the sides of the weak portion 62A of the expandable portion 62. The rear thin film portion 63B has openings 63D formed on the rear thin film portion 63B during molding. The rear thin film portion 63B is not formed on the edges of the openings 63D, which are the sides of the weak portion 62A of the expandable portion 62.

[0057] In this embodiment, an opening 63C is formed in the front thin film portion 63A and an opening 63D is formed in the rear thin film portion 63B. However, the opening 63C may be formed only in the front thin film portion 63A, or the opening 63D may be formed only in the rear thin film portion 63B.

[0058] As shown in Figure 11(A), in the vibration-damping member 60, the expandable portion 62 expands and contracts due to the acceleration of the vehicle 10, and the front thin film portion 63A also expands and contracts in accordance with the expandable portion 62. The front thin film portion 63A will eventually break if repeated expansion and contraction occurs. If the break in the front thin film portion 63A is further expanded and contracted, it may reach the opening 63C.

[0059] On the other hand, Figure 11(B) shows the state in which the crack progresses due to the deceleration of the vehicle 10. The progression of the crack is almost the same as in the case of acceleration. Note that Figures 11(A) and 11(B) show the case in which the front thin film portion 63A breaks, but the same is true when the rear thin film portion 63B breaks.

[0060] In the configuration described above, since an opening 63C is formed in the front thin film portion 63A, even if the front thin film portion 63A breaks, once the break reaches the opening 63C, the break will not progress further. In other words, it is difficult for the break to reach the side of the weak portion 62A. Therefore, load is less likely to be concentrated on the weak portion 62A. This prevents deterioration of the weak portion 62A of the expandable portion 62 due to the breakage of the thin film portion 63. As a result, the durability of the vibration-damping member 60 can be improved.

[0061] "Another example of a vibration-damping member according to the second embodiment" Using Figure 12, we will describe another example of the second embodiment, the vibration-damping member 60. In the following description, members similar to the vibration-damping member 60 described above will be referred to using the same reference numerals.

[0062] As shown in Figure 12, the front thin film portion 63A may not be formed around the entire circumference of the side surface of the expandable portion 62 at the edge of the opening 63C. Alternatively, the rear thin film portion 63B may not be formed around the entire circumference of the side surface of the expandable portion 62 at the edge of the opening 63D. This provides the same effect as the vibration-damping member 60 described above.

[0063] In this embodiment, an opening 63C is formed in the front thin film portion 63A and an opening 63D is formed in the rear thin film portion 63B. However, the opening 63C may be formed only in the front thin film portion 63A, or the opening 63D may be formed only in the rear thin film portion 63B.

[0064] Furthermore, it is preferable that the thin film portion 63 is formed on the upper part of the vibration-damping member 60 in the vehicle's vertical direction. More preferably, it is preferable that the thin film portion 63 is formed on the upper end of the vibration-damping member 60 in the vehicle's vertical direction (see Figure 8).

[0065] "Vibration-damping member of the third embodiment" An example of a third embodiment, the vibration-damping member 70, will be described using Figures 13 and 14.

[0066] Unless otherwise specified, each component of the vibration-damping member 70 has the same configuration as the corresponding component of the vibration-damping member 50 described above. As shown in Figure 13, the vibration-damping member 70 has a stopper portion 71, an expandable portion 72, and a thin film portion 73. The expandable portion 72 has a fragile portion 72A. The thin film portion 73 has a front thin film portion 73A and a rear thin film portion 73B.

[0067] A protrusion 73D is formed on the front thin film portion 73A at a predetermined distance from the side surface of the weak portion 72A of the expandable portion 72. Similarly, a protrusion (not shown) is formed on the rear thin film portion 73B at a predetermined distance from the side surface of the weak portion 72A of the expandable portion 72.

[0068] In this embodiment, a protrusion 73D is formed on the front thin film portion 73A, and a similar protrusion is formed on the rear thin film portion 73B. However, the protrusion 73D may be formed only on the front thin film portion 73A, or only on the rear thin film portion 73B. Furthermore, multiple protrusions 73D may be formed along the side surface of the fragile portion 72A.

[0069] As shown in Figure 14, in the vibration-damping member 70, the expandable portion 72 expands and contracts due to the acceleration and deceleration of the vehicle 10, and the thin film portion 73 also expands and contracts in accordance with the expandable portion 72. The thin film portion 73 will eventually break if the expansion and contraction are repeated. If the break in the thin film portion 73 is repeated further, the tear will propagate along the convex portion 73D. Note that Figure 14 shows the case where the front thin film portion 73A breaks, but the same thing happens when the rear thin film portion 73B breaks.

[0070] In the configuration described above, it is difficult for a cut to reach the side of the weak portion 72A. Therefore, load is less likely to concentrate on the weak portion 72A. This prevents deterioration of the weak portion 72A of the expandable portion 72 due to the rupture of the thin film portion 73. As a result, the durability of the vibration-damping member 70 can be improved.

[0071] "Another example of a vibration-damping member according to the third embodiment" Using Figures 15 and 16, we will describe another example of the third embodiment, the vibration-damping member 70. In the following description, members similar to the vibration-damping member 70 described above will be referred to using the same reference numerals.

[0072] As shown in Figure 15, a recess 73E is formed in the front thin film portion 73A at a predetermined distance from the side surface of the weak portion 72A of the expandable portion 72. In addition, a recess (not shown) is formed in the rear thin film portion 73B at a predetermined distance from the side surface of the weak portion 72A of the expandable portion 72. This provides the same effect as the vibration-damping member 70 described above.

[0073] In this embodiment, a recess 73E is formed in the front thin film portion 73A and a recess 73E is formed in the rear thin film portion 73B. However, a recess 73E may be formed only in the front thin film portion 73A, or only in the rear thin film portion 73B. In addition, multiple recesses 73E may be formed along the side surface of the fragile portion 72A.

[0074] As shown in Figure 16, multiple holes 73F are formed in the front thin film portion 73A at predetermined intervals from the side surface of the weak portion 72A of the expandable portion 72. In addition, multiple holes (not shown) are formed in the rear thin film portion 73B at predetermined intervals from the side surface of the weak portion 72A of the expandable portion 72. This provides the same effect as the vibration-damping member 70 described above.

[0075] In this embodiment, multiple holes 73F are formed in the front thin film portion 73A and multiple holes are formed in the rear thin film portion 73B. However, multiple holes 73F may be formed only in the front thin film portion 73A, or multiple holes may be formed only in the rear thin film portion 73B. Furthermore, multiple holes 73F may be formed in multiple rows along the side surface of the fragile portion 72A.

[0076] Furthermore, it is preferable that the thin film portion 73 is formed on the upper part of the vibration-damping member 70 in the vertical direction of the vehicle. More preferably, it is preferable that the thin film portion 73 is formed on the upper end of the vibration-damping member 70 in the vertical direction of the vehicle (see Figure 8).

[0077] It should be noted that the present invention is not limited to the embodiments and their modifications described above, and various changes and improvements are possible within the scope of the claims of this application. [Explanation of Symbols]

[0078] 10 Vehicle, 11 Body, 12 Front side member frame, 13 Suspension member, 20 Unit, 30 Support part, 31 RH mount, 32 LH mount, 33 Torque rod, 41 Outer fitting, 41A Fixing hole, 41B Opening, 42 Inner cylinder fitting, 50 Vibration damping member, 51 Stopper part, 52 Expandable part, 52A Weak part, 53 Thin film part, 53A Front thin film part, 53B Rear thin film part, 53C Opening, 53D Opening, 53E Edge part, 53F Edge part, 60 Vibration damping member, 61 Stopper part, 62 Expandable part, 62A Weak part, 63 Thin film part, 63A Front thin film part, 63B Rear thin film part, 63C Opening, 63D Opening, 70 Vibration damping member, 71 Stopper part, 72 Expandable part, 72A Weak part, 73 Thin film part, 73A Front thin film part, 73B Rear thin film part, 73D Convex part, 73E Recessed part, 73F Hole part, 90 Mold, 91 Gate, 92 Air vent part, 133 Torque rod, 141 Outer fitting, 142 Inner cylinder fitting, 150 Vibration damping member, 151 Stopper part, 152 Expandable part, 153 Thin film part, 190 Mold, 191 Gate, 192 Air vent part, P Reaching part

Claims

1. A vibration-damping member for a support component that supports a unit in the vehicle body, The support component comprises an outer fitting to which one of the unit or the vehicle body is fixed on one side, with an opening formed on the other side into which the vibration-damping member is fitted, and an inner cylindrical fitting provided on the vibration-damping member and fixed to the other side of the unit or the vehicle body. The vibration-damping member comprises at least an expandable portion that connects the inner cylinder fitting and the outer fitting and absorbs the relative movement of the unit with respect to the vehicle body by expanding and contracting, and a thin film portion formed to vent air from the mold during molding and formed continuously with the expandable portion along the direction of expansion and contraction of the expandable portion. The thin film portion has openings formed in it so that the thin film portion is not formed on the side surface of the weak portion of the stretchable portion. The opening is formed at a position where the break caused by the fracture of the thin film reaches the opening before it reaches the side of the fragile portion. Vibration-damping components for vehicle support parts.

2. A vibration-damping member for a support component that supports a unit in the vehicle body, The support component comprises an outer fitting to which one of the unit or the vehicle body is fixed on one side, with an opening formed on the other side into which the vibration-damping member is fitted, and an inner cylindrical fitting provided on the vibration-damping member and fixed to the other side of the unit or the vehicle body. The vibration-damping member comprises at least an expandable portion that connects the inner cylinder fitting and the outer fitting and absorbs the relative movement of the unit with respect to the vehicle body by expanding and contracting, and a thin film portion formed to vent air from the mold during molding and formed continuously with the expandable portion along the direction of expansion and contraction of the expandable portion. The thin film portion has openings formed in such a way that the thin film portion is not formed on the side surface of the weak portion of the stretchable portion. Vibration-damping components for vehicle support parts.

3. A vibration-damping member for a support component that supports a unit in the vehicle body, The support component comprises an outer fitting to which one of the unit or the vehicle body is fixed on one side, with an opening formed on the other side into which the vibration-damping member is fitted, and an inner cylindrical fitting provided on the vibration-damping member and fixed to the other side of the unit or the vehicle body. The vibration-damping member comprises at least an expandable portion that connects the inner cylinder fitting and the outer fitting and absorbs the relative movement of the unit with respect to the vehicle body by expanding and contracting, and a thin film portion formed to vent air from the mold during molding and formed continuously with the expandable portion along the direction of expansion and contraction of the expandable portion. The thin film portion has protrusions, recesses, or multiple holes formed at predetermined intervals from the side surface of the weak portion of the stretchable portion. Vibration-damping components for vehicle support parts.

4. A vibration damping member for a vehicle support component according to any one of claims 1 to 3, The thin film portion is formed above the central part in the vertical direction of the vehicle relative to the expandable portion. Vibration-damping components for vehicle support parts.

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