Sealing device and sealing structure

Abstract

The present invention relates to a sealing device and a sealing structure. The sealing device seals a gap between an inner peripheral surface of an opening in a first member and an outer surface of a second member fixed in the opening. The sealing device includes: a first elastomer including: a first outer surface in contact with the inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located in the first opening of the first elastomer and including: a second outer surface facing the first inner surface of the first elastomer in such a way that a separation space is left; and a second inner surface in contact with the outer surface of the second member. The first elastomer further includes a first protrusion extending inward from the first inner surface and in contact with the second outer surface of the at least one second elastomer.

Description

Cross-reference to related applications

[0001] This application is based on and claims priority to Japanese Patent Application No. 2025-026897, filed on February 21, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to sealing devices and sealing structures. Background Technology

[0003] Various techniques have been proposed for sealing the gap between the inner circumferential surface of an opening in a first member and the outer surface of a second member located within the opening. For example, Japanese Patent Application Publication No. 2024-125089 discloses that the gap between the inner circumferential surface of an opening in a housing partition (e.g., the first member) and the outer surface of a motor wiring (e.g., the second member) located in the corresponding opening is sealed by deformable hollow elastomers, each surrounding a portion of the motor wiring.

[0004] In one example, a flat wiring component (such as a busbar) is used in an electric vehicle, and an elastomer is attached to the flat wiring component. Each elastomer has an elongated oval opening that seals the gap between the flat wiring component and the elongated oval opening of the elastomer. To minimize displacement between the wiring component and the elongated oval opening of the elastomer, the elongated oval openings need to be closely spaced. However, it is difficult to mold an elastomer with sufficiently narrow elongated oval openings. While the foregoing description focuses on the flat wiring component, the same problem applies to the opening through which a second component passes in the first component. Summary of the Invention

[0005] In view of the above, one aspect of the present disclosure is to securely seal the gap between the inner circumferential surface of the opening in the first member and the outer surface of the second member using an elastomer without excessively reducing the opening around the second member in the elastomer, and to minimize the displacement of the second member relative to the first member.

[0006] According to one aspect of this disclosure, a sealing device seals a gap between the inner peripheral surface of an opening in a first member and the outer surface of a second member fixed within the opening. The sealing device includes: a first elastomer comprising: a first outer surface contacting the inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located within the first opening of the first elastomer and comprising: a second outer surface facing the first inner surface of the first elastomer with a separation space; and a second inner surface contacting the outer surface of the second member. The first elastomer further includes a first protrusion extending inwardly from the first inner surface and contacting the second outer surface of the at least one second elastomer.

[0007] According to one aspect of this disclosure, a sealing device seals a gap between the inner surface of an opening in a first member and the outer surface of a second member fixed within the opening. The sealing device includes: a first elastomer comprising: a first outer surface contacting an inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located within the first opening and comprising: a second outer surface facing the first inner surface of the first elastomer in a manner that allows for separation; and a second inner surface contacting the outer surface of the second member. The at least one second elastomer further includes a second protrusion extending outward from a second outer surface and contacting the first inner surface of the first elastomer.

[0008] According to one aspect of this disclosure, a sealing structure includes: a first member having an opening; a second member fixed within the opening; and a sealing device for sealing a gap between an inner peripheral surface of the opening in the first member and an outer surface of the second member. The sealing device includes: a first elastomer including: a first outer surface contacting an inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located within the first opening of the first elastomer and including: a second outer surface facing the first inner surface of the first elastomer with a separation space; and a second inner surface contacting the outer surface of the second member. The first elastomer further includes a first protrusion extending inwardly from the first inner surface and contacting the second outer surface of the at least one second elastomer.

[0009] According to one aspect of this disclosure, a sealing structure includes: a first member having an opening; a second member fixed within the opening; and a sealing device for sealing a gap between an inner peripheral surface of the opening in the first member and an outer surface of the second member. The sealing device includes: a first elastomer comprising: a first outer surface contacting an inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located within the first opening and comprising: a second outer surface facing the first inner surface in a manner that allows for separation; and a second inner surface contacting the outer surface of the second member. The at least one second elastomer further includes a second protrusion extending outward from a second outer surface and contacting the first inner surface of the first elastomer. Attached Figure Description

[0010] Figure 1 This is a perspective view of the sealing structure according to the first embodiment.

[0011] Figure 2 It is an exploded perspective view of the sealed structure.

[0012] Figure 3 This is a cross-sectional view of the first and second elastic bodies.

[0013] Figure 4 This is a cross-sectional view of the first and second elastic bodies.

[0014] Figure 5 This is a cross-sectional view of the first elastic body in a non-fixed state.

[0015] Figure 6 This is a cross-sectional view of one of the second elastic bodies in a non-fixed state.

[0016] Figure 7 It is a cross-sectional view of one of the first and second elastic bodies in a fixed state.

[0017] Figure 8 It is a planar sectional view of an elastic body based on a comparative example.

[0018] Figure 9 This is a cross-sectional view of the second elastic body according to the second embodiment.

[0019] Figure 10 It is a cross-sectional view of one of the first and second elastic bodies in a fixed state.

[0020] Figure 11 This is a perspective view of the sealing device according to the third embodiment.

[0021] Figure 12 This is a cross-sectional view of the second elastic body.

[0022] Figure 13 It is a cross-sectional view based on the modified first elastic body.

[0023] Figure 14 It is a cross-sectional view of a second elastic body based on another modification.

[0024] Figure 15 It is a cross-sectional view of the first elastic body based on yet another modification. Detailed Implementation

[0025] Embodiments of this disclosure will be described with reference to the accompanying drawings. In the drawings, the dimensions and proportions of the elements may differ from those of the actual product. The following embodiments are examples of this disclosure, and therefore the scope of this disclosure is not limited to these embodiments.

[0026] A: First Embodiment Figure 1 This is a perspective view of the sealing structure 100 according to the first embodiment. Figure 2 This is an exploded perspective view of the sealing structure 100. The sealing structure 100 is used in a power unit, such as an electric axle (e-axis, e-Axle) in an electric vehicle. The scope of this disclosure may be changed as needed.

[0027] In the following text, reference is made to three orthogonal axes (X-axis, Y-axis, and Z-axis). The Z-axis includes a negative direction Z1 (an example of the "first direction") and a positive direction Z2 (an example of the "second direction") opposite to the negative direction Z1. The term "plan view" refers to a view taken along the Z-axis.

[0028] like Figure 1 and Figure 2 As shown, the sealing structure 100 includes a base 10, three wiring members 20 (e.g., busbars), and a sealing device 30. The housing mounted to the electric vehicle houses two or more components of the electric vehicle (e.g., an electric motor, a power converter, and gears). The base 10 is part of the housing. The base 10 is a flat member oriented parallel to the XY plane, and is made of, for example, a metallic material. The base 10 is an example of a "first member".

[0029] The base 10 has an opening 11. The opening 11 extends in the thickness direction of the base 10. The opening 11 has an elongated oval shape extending along the X-axis. Specifically, the profile of the opening 11 has a pair of parallel opposing long sides and a pair of arcuate ends that connect the long sides.

[0030] The base 10 divides into a first space S1 and a second space S2. The first space S1 is located below the base 10 along the negative direction Z1, and the second space is located above the base 10 along the positive direction Z2. The first space S1 is located inside the housing, and the second space S2 is located outside the housing. The first space S1 houses a drive device, such as an electric motor or a power conversion device. The second space houses a control device for controlling or supplying power to the drive device housed in the second space S2. The heat generated by the drive device causes the temperature inside the first space S1 to rise, which may cause pressure fluctuations within the first space S1. Therefore, the pressure in the first space S1 may exceed the pressure in the second space S2.

[0031] Wiring component 20 is an electrical conductor and is made of a low-resistance conductive material (such as copper or a copper alloy). Wiring component 20 electrically connects the drive unit in the first space S1 to the control unit in the second space S2. In one example, wiring component 20 is a busbar for transmitting and receiving three-phase alternating current (AC) power between the drive unit and the control unit. Here, wiring component 20 is an example of a "second component".

[0032] In the first embodiment, each of the wiring members 20 is a flat, elongated member. The wiring members 20 are arranged at intervals along the X-axis and pass through the opening 11 of the base 10. The wiring members 20 are fixed within the opening 11. The main surface of the wiring member 20, i.e., the area of ​​the wiring member 20 excluding its side surfaces, is aligned along the X-axis (i.e., the longitudinal direction of the opening 11).

[0033] The sealing device 30 seals the gap between the inner peripheral surface 12 of the opening 11 in the base 10 and the outer surface 21 of the wiring member 20. The gap is sealed by the sealing device 30. Therefore, the first space S1 is isolated from the second space S2. The sealing device 30 has a thickness direction including a negative direction Z1 (first direction) and a positive direction Z2 (second direction).

[0034] In a first embodiment, the sealing device 30 includes a first elastomer 40 and three second elastomers 50. In one example, the first elastomer 40 is configured to be separate from the second elastomers 50, each elastomer being individually molded by injection molding. The second elastomers 50 each have the same structure and are made of the same material. However, one or more of the second elastomers 50 may have different structures or materials.

[0035] The first elastomer 40 and the second elastomer 50 are made of elastic materials (such as rubber materials) and are capable of elastic deformation. Examples of rubber materials for the first elastomer 40 and the second elastomer 50 include various rubber materials such as chloroprene rubber (CR), silicone rubber (SR), acrylic rubber (ACM), polyurethane rubber (UR), polyurethane rubber (PUR), vinyl methyl silicone rubber (VMQ), ethylene propylene diene monomer (EPDM), and fluororubber (FKM). The materials of the first elastomer 40 and the second elastomer 50 can be freely chosen.

[0036] In the first embodiment, the material of the first elastomer 40 is different from that of the second elastomer 50. Therefore, the hardness of the first elastomer 40 is different from that of the second elastomer 50. Specifically, the hardness of the second elastomer 50 is greater than that of the first elastomer 40. In one example, the Type A hardness of the first elastomer 40 is 40 to 80 degrees, but it can also be set to 40 degrees. The Type A hardness of the second elastomer 50 is 40 to 90 degrees, but it can also be set to 50 degrees. In this example, the difference in hardness between the first elastomer 40 and the second elastomer 50 is due to the use of different materials. However, if the first elastomer 40 and the second elastomer 50 use the same type of material, the hardness of the first elastomer 40 relative to the hardness of the second elastomer 50 can be varied by adjusting the material composition ratio.

[0037] Because the first elastomer 40 and the second elastomer 50 are made of different materials, the volume resistivity of the first elastomer 40 differs from that of the second elastomer 50. Volume resistivity is the resistance per unit volume. The volume resistivity of the second elastomer 50 is greater than that of the first elastomer 40. As a result, the current flowing through the second elastomer 50 encounters greater resistance than the current flowing through the first elastomer 40. In this example, the difference in volume resistivity between the first elastomer 40 and the second elastomer 50 is due to the use of different materials. However, if the first elastomer 40 and the second elastomer 50 were made of the same material, the volume resistivity of the first elastomer 40 relative to the volume resistivity of the second elastomer 50 could be varied by adjusting the composition ratio of the materials.

[0038] Figure 3 It is a cross-sectional view of the first elastic body 40 and the second elastic body 50 taken parallel to the XZ plane. Figure 4 This is a cross-sectional view of one of the first elastic body 40 and the second elastic body 50, taken parallel to the YZ plane. Figure 3 and Figure 4 In this case, the second elastic body 50 is not fixed to the first elastic body 40.

[0039] like Figures 1 to 4As shown, the first elastic body 40 is fixed to the opening 11 of the base 10. The first elastic body 40 has an elongated oval shape that extends along the X-axis and matches the shape of the opening 11.

[0040] In one example, the first elastomer 40 has three first openings O1, each corresponding to one of the second elastomers 50. The first openings O1 are through-holes, spaced apart along the X-axis, and extend in the thickness direction of the first elastomer 40. Each first opening O1 has an elongated oval shape extending along the X-axis. Specifically, the profile of the first opening O1 has a pair of opposing parallel long sides and a pair of arcuate ends connecting the long sides.

[0041] Each of the second elastic bodies 50 is fixed to a corresponding first opening O1, and each has an elongated oval shape extending along the X-axis and matching the shape of the first opening O1. The second elastic bodies 50 are arranged at intervals along the X-axis.

[0042] Each of the second elastic bodies 50 has a second opening O2 extending in the thickness direction of the second elastic body 50. The second opening O2 is a through hole. Each of the second openings O2 has an elongated oval shape extending along the X-axis. Specifically, the outline of the second opening O2 has a pair of opposing parallel long sides and a pair of arc-shaped ends connecting the long sides. Each wiring member 20 passes through a corresponding second opening O2 of the second elastic body 50 and is surrounded by a corresponding second elastic body 50.

[0043] In the following text, the term "fixed state" refers to the following states: (i) the first elastic body 40 is fixed to the base 10, (ii) the wiring member 20 passes through a corresponding second elastic body 50, and (iii) the second elastic body 50 is fixed to the first elastic body 40 together with the wiring member 20. Therefore, in the fixed state, the sealing structure 100 is assembled as a combination of the base 10, the wiring member 20, and the sealing device 30. Conversely, in the following text, the term "non-fixed state" refers to the following states: (i) the first elastic body 40 is not fixed to the base 10, (ii) the second elastic body 50 is not fixed to the first elastic body 40, and (iii) the wiring member 20 does not pass through a corresponding second elastic body 50. Therefore, in the non-fixed state, the first elastic body 40 and the second elastic body 50 are separate.

[0044] Figure 5 This is a cross-sectional view of the first elastic body 40 in a non-fixed state. Figure 5 Depicting Figure 3 Area A1 / Figure 4 Region A2 in the diagram. The construction of the first elastic body 40 will now be described with reference to any first opening O1.

[0045] like Figure 5As shown, the first elastomer 40 has a first outer surface 41, a first inner surface 42, a bottom surface 43, and a top surface 44. The first outer surface 41 defines the outer peripheral surface of the first elastomer 40 and faces radially outward (away from the first opening O1). The first outer surface 41 contacts the inner peripheral surface 12 of the opening 11 in the base 10. The first inner surface 42 defines the inner peripheral surface of the first elastomer 40 and faces radially inward. The first inner surface 42 also defines the inner peripheral surface of the first opening O1. In the following text, the term "circumferential direction" refers to the direction along the inner periphery of the first opening O1 in the first elastomer 40 in a plan view.

[0046] The bottom surface 43 defines a flat end face of the first elastomer 40 oriented in the negative direction Z1. The top surface 44 defines a flat end face of the first elastomer 40 oriented in the positive direction Z2. A first opening O1 extends along the Z-axis from the bottom surface 43 to the top surface 44.

[0047] like Figure 5 As shown, the first outer surface 41 includes a first peripheral protrusion 451 and a second peripheral protrusion 452, which extend radially outward and surround the entire outer periphery of the first elastomer 40. Furthermore, the first peripheral protrusion 451 and the second peripheral protrusion 452 are spaced apart from each other in the thickness direction of the sealing device 30. The first peripheral protrusion 451 is located further in the negative direction Z1 than the second peripheral protrusion 452.

[0048] The first elastomer 40 includes a first retaining portion 461 and a second retaining portion 462 extending radially outward from a first outer surface 41. The first retaining portion 461 and the second retaining portion 462 respectively form flanges that extend and surround the entire outer periphery of the first elastomer 40.

[0049] The first retaining portion 461 and the second retaining portion 462 are arranged at intervals along the Z-axis. A first outer surface 41 (first peripheral protrusion 451 and second peripheral protrusion 452) is located between the first retaining portion 461 and the second retaining portion 462. Specifically, the first retaining portion 461 is located below the first outer surface 41 (negative direction Z1), and the second retaining portion 462 is located above the same first outer surface 41 (positive direction Z2). The upper surface (positive direction Z2) of the second retaining portion 462 is located on the same plane as the top surface 44 of the first elastomer 40.

[0050] The height of the first retaining portion 461 and the height of the second retaining portion 462 are respectively greater than the height of the first peripheral protrusion 451 and the height of the second peripheral protrusion 452. Specifically, the tops of the first retaining portion 461 and the second retaining portion 462 are located further outward than the tops of the first peripheral protrusion 451 and the second peripheral protrusion 452. Furthermore, the height of the first retaining portion 461 is less than the height of the second retaining portion 462. In other words, the top of the second retaining portion 462 is located further outward than the top of the first retaining portion 461.

[0051] like Figure 5 As shown, the first outer surface 41 (specifically, the first peripheral protrusion 451 and the second peripheral protrusion 452) contacts the inner peripheral surface 12 of the opening 11 in the base 10 in an interference fit. When the first outer surface 41 contacts the inner peripheral surface 12 of the opening 11, the inner edge of the base 10 is located between the first retaining portion 461 and the second retaining portion 462. Specifically, the inner edge of the base 10 includes a bottom corner portion positioned along the negative direction Z1 and a top corner portion positioned along the positive direction Z2. The bottom corner portion contacts the first retaining portion 461, and the top corner portion of the base 10 contacts the second retaining portion 462. Therefore, the base 10 is clamped by the first retaining portion 461 and the second retaining portion 462.

[0052] As described above, in the first embodiment, the first peripheral protrusion 451 and the second peripheral protrusion 452 of the first elastomer 40 contact the inner peripheral surface 12 of the opening 11 in the base 10, thereby ensuring a strong seal between the base 10 and the first elastomer 40. Furthermore, the inner peripheral surface 12 of the opening 11 in the base 10 contacts the first outer surface 41 of the first elastomer 40 (i.e., the first peripheral protrusion 451 and the second peripheral protrusion 452). In this state, the base 10 is positioned between the first retaining portion 461 and the second retaining portion 462. As a result, axial displacement of the first elastomer 40 relative to the base 10 is suppressed.

[0053] The first elastomer 40 also includes a first protrusion 47. The first protrusion 47 extends radially inward from the first inner surface 42 and includes a distal end 471 and a proximal end 472. The first protrusion 47 is located at the axial center of the first inner surface 42 and extends around the entire periphery of the first elastomer 40.

[0054] like Figure 5 As shown, in the non-fixed state, the first protrusion 47 is inclined outward and downward. Specifically, the first protrusion 47 is inclined relative to the Z-axis and extends from the first inner surface 42 toward the negative direction Z1. Therefore, the distal end 471 of the first protrusion 47 is located further toward the negative direction Z1 than the proximal end 472 of the first protrusion 47. Here, as... Figure 5The central plane Zc shown is an imaginary plane equidistant from the first peripheral protrusion 451 and the second peripheral protrusion 452 along the thickness direction of the sealing device 30. The central plane Zc is an imaginary plane that intersects the midpoint between the tops of the first peripheral protrusion 451 and the tops of the second peripheral protrusion 452 and is perpendicular to the Z-axis (the thickness direction of the sealing device). The distal end 471 of the first protrusion 47 is located further negatively in the Z1 direction than the central plane Zc.

[0055] The first elastic body 40 further includes an inclined surface 421 at the end of the first inner surface 42 positioned along the positive direction Z2. The inclined surface 421 is inclined relative to the Z-axis (the thickness direction of the sealing device 30), such that the diameter of the inclined surface 421 increases along the positive direction Z2. Specifically, the inner diameter of the inclined surface 421 at the end positioned along the negative direction Z1 is smaller than the inner diameter at the end positioned along the positive direction Z2. Therefore, the corner where the first inner surface 42 intersects the top surface 44 is chamfered.

[0056] Figure 6 This is a cross-sectional view of the second elastic body 50 in a non-fixed state. Figure 6 Depicting Figure 3 Area B1 / Figure 4 Region B2 in the diagram. The second elastomer 50 has the same structure, therefore the construction of one of the second elastomers 50 will now be described.

[0057] like Figure 6 As shown, the second elastomer 50 has a second outer surface 51, a second inner surface 52, a bottom surface 53, and a top surface 54. The bottom surface 53 defines a flat end face oriented in the negative direction Z1, and the top surface 54 defines a flat end face oriented in the positive direction Z2. A second opening O2 extends along the Z-axis between the bottom surface 53 and the top surface 54. In the following text, the term "circumferential direction" refers to the direction along the inner circumference of the second opening O2 in the second elastomer 50 in a plan view.

[0058] The second outer surface 51 defines the outer peripheral surface of the second elastomer 50 and faces radially outward (away from the second opening O2). The second outer surface 51 is flat and extends along the Z-axis. Figure 6 As shown, the second outer surface 51 faces the first inner surface 42 of the first elastic body 40, and there is a separation space Q between the second outer surface 51 and the first inner surface 42. The separation space Q is an annular space surrounding the entire outer periphery of the second elastic body 50.

[0059] Figure 7 This is a cross-sectional view of one of the first elastic body 40 and the second elastic body 50 in a fixed state. (Example) Figure 7As shown, the second elastomer 50 is fixed to the first opening O1 of the first elastomer 40. In this state, the first protrusion 47 of the first elastomer 40 contacts the second outer surface 51 of the second elastomer 50. The first protrusion 47 is deformed by radially outward (negative direction of the X-axis) compression from the second outer surface 51 of the second elastomer 50. Specifically, opposite to the non-fixed state, the distal end 471 of the first protrusion 47 is radially outwardly displaced when compressed by the second outer surface 51. Therefore, the first protrusion 47 contacts the second outer surface 51 of the second elastomer 50 in an interference fit.

[0060] like Figure 6 As shown, the second elastomer 50 also includes a third retaining portion 55. The second elastomer 50 includes a top end and a bottom end. The top end includes a top surface 54 and is positioned in the positive direction Z2. The bottom end includes a bottom surface 53 and is positioned in the negative direction Z1. The third retaining portion 55 extends radially outward from the second outer surface 51 and includes a portion of the top end. Specifically, the third retaining portion 55 extends radially outward from the end of the second outer surface 51 positioned in the positive direction Z2. The third retaining portion 55 forms a flange extending around the entire outer periphery of the second elastomer 50.

[0061] exist Figure 7 In the fixed state shown, the third retaining portion 55 contacts the top surface 44 of the first elastic body 40, thereby determining the axial position of the second elastic body 50 relative to the first elastic body 40. In this state, the bottom surface 43 of the first elastic body 40 is located further in the negative direction Z1 than the bottom surface 53 of the second elastic body 50.

[0062] The second inner surface 52 of the second elastomer 50 defines the inner peripheral surface of the second elastomer 50 and faces radially inward. The second inner surface 52 also defines the inner peripheral surface of the second opening O2. The wiring member 20 passes through the second opening O2 of the second elastomer 50, therefore, the second inner surface 52 contacts the outer surface 21 of the wiring member 20.

[0063] The second inner surface 52 includes a base region 56 defining a flat surface and extending along the Z-axis, and an inner peripheral protrusion 57. The inner peripheral protrusion 57 is located below the base region 56, that is, at a position further in the negative Z1 direction than the base region 56. The inner peripheral protrusion 57 extends radially inward from the same height as the base region 56 and extends around the entire outer periphery of the second elastomer 50.

[0064] An inner peripheral protrusion 57 is disposed on the second inner surface 52 and has a first inclined surface 571 and a second inclined surface 572. The first inclined surface 571 is located below the second inclined surface 572; that is, at a position further in the negative direction Z1 than the second inclined surface 572. The second inclined surface 572 is positioned along the Z-axis between the first inclined surface 571 and the base region 56. Specifically, the first inclined surface 571 is inclined relative to the Z-axis (the thickness direction of the sealing device 30) such that its diameter increases in the negative direction Z1. The second inclined surface 572 is inclined relative to the Z-axis such that its diameter increases in the positive direction Z2. The inner peripheral protrusion 57 includes a top 573 that forms the intersection of the first inclined surface 571 and the second inclined surface 572. Figure 7 As shown, the top 573 of the inner peripheral protrusion 57 is located below the central plane Zc; that is, it is located further in the negative direction Z1 than the central plane Zc between the first outer peripheral protrusion 451 and the second outer peripheral protrusion 452.

[0065] The top 573 of the inner peripheral protrusion 57 contacts the outer surface 21 of the wiring member 20. In the non-fixed state, the planar dimension of the second opening O2 is smaller than the planar dimension of the wiring member 20. As a result, the inner peripheral protrusion 57 of the second elastomer 50 contacts the outer surface 21 of the wiring member 20 in an interference fit.

[0066] The construction of the assembled sealing structure 100 will now be described. A first elastic body 40 is fixed to a base 10, and a second elastic body 50 is fixed to a corresponding wiring member 20. Specifically, the first elastic body 40 is fixed to an opening 11 in the base 10, and the wiring member 20 is assembled in a corresponding second opening O2 corresponding to the second elastic body 50.

[0067] Each wiring component 20 is attached to a corresponding first opening O1 of the first elastic body 40 by a second elastic body 50. Specifically, the second elastic body 50 passes through a corresponding first opening O1 along the negative direction Z1 and is compressed until the third retaining portion 55 contacts the top surface 44 of the first elastic body 40. Therefore, in the first embodiment, the first elastic body 40 includes an inclined surface 421 at the end of the first inner surface 42 positioned along the positive direction Z2. This configuration facilitates the insertion of the second elastic body 50 into a corresponding first opening O1 of the first elastic body 40.

[0068] As described above, in the first embodiment, the first outer surface 41 of the first elastic body 40 contacts the inner peripheral surface 12 of the opening 11 in the base 10, and the second inner surface 52 of each second elastic body 50 contacts the outer surface 21 of the corresponding wiring member 20. With this configuration, the first protrusion 47 extending from the first inner surface 42 of the first elastic body 40 contacts the second outer surface 51 of each second elastic body 50. As a result, the gap between the inner peripheral surface 12 of the opening 11 in the base 10 and the outer surface 21 of the corresponding wiring member 20 is securely sealed.

[0069] The position of the wiring component 20 relative to the base 10 can change due to displacement along the XY plane. However, as Figure 7 As shown, in the first embodiment, the first inner surface 42 of the first elastic body 40 faces the second outer surface 51 of each of the second elastic bodies 50, and a separation space Q exists between the first and second elastic bodies. Consequently, the separation space Q varies according to positional changes between the base 10 and the wiring member 20. The change in separation space Q absorbs positional changes. As a result, the first elastic body 40 maintains continuous contact with the base 10, and the second elastic body 50 maintains continuous contact with its corresponding wiring member 20. When the separation space Q between the first elastic body 40 and the second elastic body 50 becomes sufficiently small, either the first elastic body 40 or the second elastic body 50 elastically deforms. As a result, any relative positional changes between the base 10 and the wiring member 20 are absorbed.

[0070] Figure 8 This is a planar sectional view of the elastomer 90 according to the comparative example. In the comparative example, an elastomer 90 is provided. The elastomer 90 has a body portion 91 and protrusions 92. In the plan view, the body portion 91 has an elongated oval shape, and its outer peripheral surface contacts the inner peripheral surface 12 of the opening 11 in the base 10. The body portion 91 is provided with three elongated oval openings 93. Each protrusion 92 extends radially inward from the inner peripheral surface of a corresponding opening 93 and defines an elongated oval opening. Wiring members 20 pass through the corresponding openings. As a result, the outer surface 21 of each wiring member 20 contacts a corresponding protrusion 92.

[0071] In the comparative example, any change in relative position between one of the wiring members 20 and the base 10 is absorbed by the deformation of the corresponding protrusion 92. To achieve this effect, the spacing W of the elongated openings must be close together. Specifically, the spacing W should be less than the thickness of each wiring member 20. However, it is difficult to mold the elastomer 90 with such a small spacing W between the elongated openings.

[0072] In the comparative example, the elongated opening at each protrusion 92 is covered by a thin film, and the wiring component passes through the film into the opening. However, as the wiring component passes through the film, a small portion of the film is damaged, which may reduce the sealing performance of the sealing device 30.

[0073] In the first embodiment, as Figure 7 As shown, the change in the separation space Q between the first elastomer 40 and the second elastomer 50 absorbs the relative positional change between the base 10 and the wiring member 20. This configuration eliminates the need to deform the inner circumferential protrusion 57 of the second elastomer 50 to absorb the relative positional change between the base 10 and the wiring member 20. Consequently, there is no need to excessively reduce the size of the second opening O2. The molding process is easier compared to the comparative example. Furthermore, since the second elastomer 50 does not require the formation of the film described in the comparative example, the sealing performance is maintained. According to the first embodiment, the gap between the base 10 and the wiring member 20 can be securely sealed without excessively reducing the size of the second opening O2 of the second elastomer 50.

[0074] According to the first embodiment, the material of the first elastic body 40 is different from the material of the second elastic body 50. As a result, the first elastic body 40 can be formed from any suitable material, as long as it remains in contact with the inner peripheral surface 12 of the opening 11 in the base 10. Similarly, the second elastic body 50 can be formed from any suitable material, as long as it remains in contact with each outer surface 21 of the wiring member 20. Furthermore, the hardness of the first elastic body 40 is different from the hardness of the second elastic body 50. As a result, a first elastic body 40 with appropriate hardness can be formed, as long as it remains in contact with the inner peripheral surface 12 of the opening 11 in the base 10. Similarly, a second elastic body 50 with appropriate hardness can be formed, as long as it remains in contact with the corresponding outer surface 21 of the wiring member 20.

[0075] Specifically, the hardness of each second elastic body 50 is greater than that of the first elastic body 40. As a result, positional changes between the base 10 and the wiring member 20 can be effectively absorbed, and the wiring member 20 can be reliably held within the second elastic body 50. Furthermore, the volume resistivity of the second elastic body 50, which contacts one of the wiring members 20, is greater than that of the first elastic body 40. As a result, electrical interference around the wiring member 20 can be reduced. In particular, the possibility of a short circuit between the wiring member 20 and the base 10 can be reduced.

[0076] According to the first embodiment, such as Figure 7As shown, the first protrusion 47 of the first elastic body 40, extending downward (along the negative direction Z1), contacts the second outer surface 51 of the second elastic body 50. As a result, when the air pressure in the first space S1 is greater than the air pressure in the second space S2, the gap between the base 10 and the wiring member 20 can be securely sealed. Specifically, as... Figure 5 As shown, the distal end 471 of the first protrusion 47 is located further in the negative direction Z1 than the central plane Zc between the first peripheral protrusion 451 and the second peripheral protrusion 452. Compared to the case where the distal end 471 is located further in the positive direction Z2 than the central plane Zc, this arrangement reduces the possibility that the first inner surface 42 of the first elastomer 40 will shift in the positive direction Z2 due to the high air pressure in the first space S1.

[0077] According to the first embodiment, such as Figure 7 As shown, the inner peripheral protrusion 57 is located on the second inner surface 52 of the second elastic body 50 and contacts the outer surface 21 of the wiring member 20. This configuration effectively seals the gap between the inner peripheral surface 12 of the opening 11 in the base 10 and the outer surface 21 of the wiring member 20. In particular, the top 573 of the inner peripheral protrusion 57 is located in a position further negatively in the Z1 direction than the central plane Zc. Compared to the case where the top 573 is located in a position further positively in the Z2 direction than the central plane Zc, this configuration reduces the deformation of the second elastic body 50 caused by the high pressure in the first space S1.

[0078] B: Second Embodiment The second embodiment will now be described. In each of the corresponding modifications illustrated below, elements that are substantially the same as those described in the first embodiment are indicated by the same reference numerals, and detailed descriptions of these elements are appropriately omitted.

[0079] Figure 9 This is a cross-sectional view of the second elastic body 50 according to the second embodiment. (See figure) Figure 9 As shown, the second elastomer 50 also includes a second protrusion 58. The second protrusion 58 extends radially outward from the second outer surface 51 and includes a distal end 581 and a proximal end 582. Furthermore, the second protrusion 58 is located at the axial center of the second outer surface 51 and extends around the entire periphery of the second elastomer 50.

[0080] like Figure 9 As shown, in the non-fixed state, the second protrusion 58 is inclined outward and downward. Specifically, the second protrusion 58 is inclined relative to the Z-axis and extends from the second outer surface 51 toward the negative direction Z1. Therefore, the distal end 581 of the second protrusion 58 is located further toward the negative direction Z1 than the proximal end 582 of the second protrusion 58. Here, Figure 9The same central plane Zc is also shown, which is an imaginary surface equidistant from the first peripheral protrusion 451 and the second peripheral protrusion 452 along the thickness direction of the sealing device 30. The distal end 581 of the second protrusion 58 is located further in the negative direction Z1 than the central plane Zc.

[0081] Figure 10 This is a cross-sectional view of one of the first elastic body 40 and the second elastic body 50 in a fixed state. (Example) Figure 10 As shown, the first inner surface 42 of the first elastomer 40 is flat and extends along the Z-axis. In this embodiment, the first inner surface 42 does not have a first protrusion 47.

[0082] like Figure 10 As shown, the second elastomer 50 is fixed to the first opening O1 of the first elastomer 40. In this state, the second protrusion 58 of the second elastomer 50 contacts the first inner surface 42 of the first elastomer 40. The second protrusion 58 is deformed by being radially pressed inward by the first inner surface 42 of the first elastomer 40. Specifically, compared to the unfixed state, when pressed by the second inner surface 52, the distal end 581 of the second protrusion 58 is radially displaced inward. Therefore, the second protrusion 58 contacts the first inner surface 42 of the first elastomer 40 in an interference fit. This embodiment corresponds to the first embodiment except that the first protrusion 47 of the first elastomer 40 is replaced by the second protrusion 58 of the second elastomer 50.

[0083] According to the second embodiment, such as Figure 10 As shown, the first outer surface 41 of the first elastomer 40 contacts the inner peripheral surface 12 of the opening 11 in the base 10, and the second inner surface 52 of each second elastomer 50 contacts the outer surface 21 of the corresponding wiring member 20. In this configuration, a second protrusion 58 extending from the second outer surface 51 of the second elastomer 50 contacts the first inner surface 42 of the first elastomer 40, thereby sealing the gap between the inner peripheral surface 12 of the opening 11 in the base 10 and the outer surface 21 of each wiring member 20.

[0084] Similar to the first embodiment, in the second embodiment, as... Figure 10As shown, the first inner surface 42 of the first elastomer 40 faces the second outer surface 51 of the second elastomer 50, and a separation space Q exists between the first and second elastomers. The separation space Q varies according to changes in position between the base 10 and the wiring member 20. This variation in the separation space Q absorbs changes in position between the base 10 and the wiring member 20. This variation in the separation space Q absorbs changes in relative position between the base 10 and the wiring member 20. The second embodiment described above provides the same advantage as the first embodiment, namely, achieving a robust seal between the base 10 and the wiring member 20 without excessively reducing the second opening O2 of the second elastomer 50.

[0085] In addition, such as Figure 10 As shown, the second protrusion 58, extending in the negative direction Z1, contacts the first inner surface 42 of the first elastomer 40. As a result, even when the air pressure in the first space S1 exceeds the air pressure in the second space S2, the space between the base 10 and the wiring member 20 can be securely sealed. Specifically, the distal end 581 of the second protrusion 58 is located further in the negative direction Z1 than the central plane Zc between the first peripheral protrusion 451 and the second peripheral protrusion 452. Compared to the case where the distal end 581 of the second protrusion 58 is located further in the positive direction Z2 than the central plane Zc, this arrangement reduces the possibility of the second outer surface 51 of the second elastomer 50 shifting in the positive direction Z2 due to the high air pressure in the first space S1.

[0086] C: Third Embodiment Figure 11 This is a perspective view of the sealing device 30 according to the third embodiment. Figure 12 This is a cross-sectional view of the second elastic body 50. In the first embodiment, each of the second elastic bodies 50 is an independent component. Conversely, in... Figure 11 and Figure 12 In the third embodiment shown, for example, three elastic bodies 50 are interconnected. The construction of the first elastic body 40 and the second elastic body 50 remains the same as in the first embodiment.

[0087] Specifically, two adjacent second elastomers 50 are interconnected along the X-axis via connectors 60. The three second elastomers 50 and the two connectors 60 are integrally molded by injection molding. In the fixed state, the connectors 60 are located on the bottom surface 43 (end face along the positive direction Z2) of the first elastomer 40.

[0088] The third embodiment provides the same effect as the first embodiment.

[0089] Furthermore, the second elastomers 50 are interconnected. As a result, compared to the cases where the second elastomers 50 are each independent components as described in the first and second embodiments, they are easier to process. By reducing the number of parts in the sealing device 30, manufacturing costs can be minimized. It should be noted that the sealing device 30 and the second elastomers 50 described above are based on the sealing device and the second elastomer described in the first embodiment. However, the interconnected second elastomers 50 can be applied to the second embodiment in which each of the second elastomers 50 includes a second protrusion 58.

[0090] D: Modify Specific modifications to the foregoing embodiments are described below. Two or more modifications may be combined with each other, as long as such combination does not cause any contradiction.

[0091] (1) When the air pressure in the first space S1 is greater than the air pressure in the second space S2, as in the first embodiment Figure 5 As shown, preferably, the first protrusion 47 extends radially inward and downward (along the negative direction Z1). Conversely, when the air pressure in the second space S2 exceeds the air pressure in the first space S1, as... Figure 13 As shown, the first protrusion 47 can also extend upward (in the positive direction Z2) from the first inner surface 42 of the first elastomer 40. Figure 13 As shown, the first protrusion 47 extends radially inward and upward. Specifically, the distal end 471 of the first protrusion is located in a more positive direction Z2 position than the proximal end 472.

[0092] In the second embodiment, as Figure 9 As shown, the second protrusion 58 extends radially outward and downward (along the negative direction Z1). When the air pressure in the second space S2 is greater than the air pressure in the first space S1, as... Figure 14 As shown, the second protrusion 58 can extend radially outward and upward. Specifically, the second protrusion 58 can extend from the second outer surface 51 of the second elastomer 50 along the positive direction Z2. Figure 14 As shown, the distal end 581 of the second protrusion 58 is located in a position more positively Z2 than the proximal end 582 of the second protrusion 58.

[0093] (2) In the above embodiments, the material of the first elastomer 40 is different from the material of the second elastomer 50. However, the material of the first elastomer 40 can be the same as the material of the second elastomer 50. In this case, the first elastomer 40 and the second elastomer 50 can have the same properties, such as hardness and volume resistivity. Compared with the case of using different materials (as described in the first to third embodiments), the manufacturing cost of the first elastomer 40 and the second elastomer 50 is minimized when using the same materials.

[0094] (3) In the above embodiments, the first outer surface 41 of the first elastomer 40 includes two peripheral protrusions 45 (451 and 452). However, the number of peripheral protrusions on the first outer surface 41 can be freely chosen. For example, as Figure 15 As shown, the first outer surface 41 may include a single peripheral protrusion 45. Alternatively, the first outer surface 41 may include three or more peripheral protrusions 45 spaced apart along the Z-axis. Thus, in one aspect of this disclosure, the first outer surface 41 of the first elastomer 40 includes at least one peripheral protrusion 45. Alternatively, the peripheral protrusion 45 may be omitted as long as a reliable seal can be maintained between the inner peripheral surface 12 of the opening 11 in the base 10 and the first outer surface 41 of the first elastomer 40.

[0095] (4) In the above embodiment, three second elastic bodies 50 are fixed to the first elastic body 40. However, the ratio between the number of first elastic bodies 40 and the number of second elastic bodies 50 can be freely chosen. Specifically, a single second elastic body 50 can be fixed to a single first elastic body 40. Alternatively, two or four or more second elastic bodies 50 can be fixed to a single first elastic body 40.

[0096] (5) In the above embodiment, the sealing device 30 seals the space between the base 10, which is mounted on the housing of the electric vehicle, and the wiring member 20, which passes through the opening 11 of the base 10. However, the sealing device 30 is not limited to sealing only this space. Here, the base 10 is an example of a "first member" and the wiring member 20 is an example of a "second member" located within the opening of the first member.

[0097] In the above embodiment, the wiring member 20 is fixed within the opening 11 of the base 10. Alternatively, the second member may be a shaft (axial member) capable of rotating about its axis of rotation, or a shaft that oscillates relative to the Z-axis.

[0098] (6) The reference numeral “nth” (where n is a natural number) in this disclosure is used only as a convenient formal designation to distinguish the elements in the numeral and has no substantive meaning. Therefore, the reference numeral “nth” should not be interpreted as limiting the position, manufacturing order or similar aspects of each element.

[0099] E: Appendix The following example configuration can be obtained from the foregoing embodiments.

[0100] According to one aspect of this disclosure (Aspect 1), a sealing device seals a gap between the inner peripheral surface of an opening in a first member and the outer surface of a second member fixed within the opening. The sealing device includes: a first elastomer comprising: a first outer surface contacting the inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located within the first opening of the first elastomer and comprising: a second outer surface facing the first inner surface of the first elastomer in a manner that leaves a separation space; and a second inner surface contacting the outer surface of the second member. The first elastomer further includes a first protrusion extending inwardly from the first inner surface and contacting the second outer surface of the at least one second elastomer.

[0101] In this aspect, the first outer surface of the first elastomer contacts the inner peripheral surface of the opening in the first member, and the second inner surface of the second elastomer contacts the surface of the second member. In this configuration, a first protrusion extending from the first inner surface of the first elastomer contacts the second outer surface of the second elastomer, thereby sealing the gap between the inner peripheral surface of the opening in the first member and the surface of the second member.

[0102] Furthermore, the first inner surface of the first elastomer faces the second outer surface of the second elastomer, and a separation space exists between the first and second elastomers. The separation space changes; however, even if the relative positions between the first and second components change, the first elastomer remains in contact with the first component, and the second elastomer remains in contact with the second component. As a result, a robust seal between the first and second components can be achieved without excessively reducing the size of the second opening in the second elastomer.

[0103] According to another aspect of this disclosure (Aspect 2), a sealing device seals a gap between the inner surface of an opening in a first member and the outer surface of a second member fixed within the opening. The sealing device includes: a first elastomer comprising: a first outer surface contacting an inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located within the first opening and comprising: a second outer surface facing the first inner surface of the first elastomer in a manner that allows for separation; and a second inner surface contacting the outer surface of the second member. The at least one second elastomer further includes a second protrusion extending outward from a second outer surface and contacting the first inner surface of the first elastomer.

[0104] In this aspect, the first outer surface of the first elastomer contacts the inner peripheral surface of the opening in the first member, and the second inner surface of the second elastomer contacts the surface of the second member. In this configuration, a second protrusion extending from the second outer surface of the second elastomer contacts the first inner surface of the first elastomer, thereby sealing the gap between the inner peripheral surface of the opening in the first member and the surface of the second member.

[0105] Furthermore, the first inner surface of the first elastomer faces the second outer surface of the second elastomer, and a separation space exists between the first and second elastomers. The separation space changes; however, even if the relative positions between the first and second components change, the first elastomer remains in contact with the first component, and the second elastomer remains in contact with the second component. As a result, a robust seal between the first and second components can be achieved without excessively reducing the second opening of the second elastomer.

[0106] In an example (Aspect 3) according to aspect 1 or aspect 2, the first elastomer is made of a material different from that of at least one second elastomer.

[0107] In this respect, the first elastomer can be made of a suitable material, provided that the first elastomer remains in contact with the inner peripheral surface of the opening in the first member. Similarly, the second elastomer can be formed of a suitable material, provided that the second elastomer remains in contact with the surface of the second member.

[0108] In an example (Aspect 4) according to aspect 1 or aspect 2, the first elastomer is made of the same material as the material of at least one second elastomer.

[0109] In this respect, the manufacturing costs of the first elastomer and the second elastomer can be minimized.

[0110] In an example (Aspect 5) according to any one of aspects 1 to 4, the hardness of the first elastomer is different from the hardness of at least one second elastomer.

[0111] In this respect, a first elastomer with appropriate hardness can be formed, provided that the first elastomer is in contact with the inner peripheral surface of the opening in the first member. Similarly, a second elastomer with appropriate hardness can be formed, provided that the second elastomer remains in contact with the surface of the second member.

[0112] In the example according to aspect 5 (aspect 6), the hardness of at least one second elastomer is greater than the hardness of the first elastomer.

[0113] In this respect, the hardness of the second elastomer is greater than that of the first elastomer. As a result, positional changes between the first and second components can be effectively absorbed, and the second component can be reliably held in place by the second elastomer.

[0114] In an example (Aspect 7) according to any one of aspects 1 to 6, the second member is an electrical conductor, and the volume resistivity of at least one second elastic body is greater than the volume resistivity of the first elastic body.

[0115] In this respect, the volume resistivity of the second elastic body in contact with the conductive second member is greater than that of the first elastic body. As a result, electrical interference around the second member can be reduced.

[0116] In an example (Aspect 8) according to any one of aspects 1 to 7, the first elastomer further includes a first retaining portion and a second retaining portion extending outwardly from a first outer surface. The first outer surface is located between the first retaining portion and the second retaining portion. The first member includes an inner edge positioned along an opening, the inner edge being located between the first retaining portion and the second retaining portion.

[0117] In this aspect, the inner peripheral surface of the opening in the first member contacts the outer surface of the first elastomer. In this state, the first member is located between the first retaining portion and the second retaining portion. As a result, axial displacement of the first elastomer relative to the first member can be suppressed.

[0118] In an example (Aspect 9) according to any one of aspects 1 to 8, the first outer surface of the first elastomer includes at least one peripheral protrusion that extends circumferentially around the first elastomer.

[0119] In this respect, at least one peripheral protrusion contacts the inner peripheral surface of the opening in the first member, thereby ensuring a strong seal between the first member and the first elastomer.

[0120] In the example according to aspect 1 (aspect 10), the first protrusion of the first elastomer includes a distal end and a proximal end. The sealing device has a thickness direction including a first direction. The distal end is located further along the first direction than the proximal end.

[0121] In this respect, a first protrusion of the first elastomer extending in a first direction contacts the second outer surface of the second elastomer. As a result, when the air pressure in the first space positioned along the first direction of the sealing device is greater than the air pressure in the second space positioned along a second direction opposite to the first direction, the gap between the first member and the second member can be securely sealed.

[0122] In the example according to aspect 10 (aspect 11), the first outer surface of the first elastomer includes a first peripheral protrusion and a second peripheral protrusion, each of the first and second peripheral protrusions extending circumferentially outward around the first elastomer. The first and second peripheral protrusions are spaced apart from each other along the thickness direction of the sealing device. The distal end of the first protrusion is located further in a first direction than the central plane. The central plane is an imaginary plane equidistant from the first and second peripheral protrusions along the thickness direction of the sealing device.

[0123] In this respect, the distal end of the first protrusion is located further in a first direction than the central plane. Compared to the case where the distal end is located further in a second direction than the central plane, this arrangement reduces the possibility that the first inner surface of the first elastomer may shift in the second direction due to the high air pressure in the first space.

[0124] In the example according to aspect 2 (aspect 12), the second protrusion of at least one second elastomer includes a distal end and a proximal end. The sealing device has a thickness direction including a first direction. The distal end is located further along the first direction than the proximal end.

[0125] In this respect, the second protrusion extending along the first direction contacts the first inner surface of the first elastomer. As a result, when the air pressure in the first space positioned along the first direction of the sealing device is greater than the air pressure in the second space positioned along the second direction, the gap between the first member and the second member can be securely sealed.

[0126] In the example according to aspect 12 (aspect 13), the first outer surface of the first elastomer includes a first peripheral protrusion and a second peripheral protrusion, each of the first and second peripheral protrusions extending circumferentially outward around the first elastomer. The first and second peripheral protrusions are spaced apart from each other along the thickness direction of the sealing device. The distal end of the second protrusion is located further in a first direction than the central plane. The central plane is an imaginary plane equidistant from the first and second peripheral protrusions along the thickness direction of the sealing device.

[0127] In this respect, the distal end of the second protrusion is located further in the first direction than the central plane. Compared to the case where the distal end is located further in the second direction than the central plane, this arrangement reduces the possibility that the second inner surface of the second elastomer may shift along the second direction due to the high air pressure in the first space.

[0128] In an example (Aspect 14) according to aspect 11 or aspect 13, the second inner surface of at least one second elastomer includes an inner circumferential protrusion extending circumferentially around the at least one second elastomer. The inner circumferential protrusion includes a top located in a first direction more than the central plane.

[0129] In this respect, the inner circumferential protrusion is located on the second inner surface of the second elastomer and contacts the surface of the second member. This configuration effectively seals the gap between the inner circumferential surface of the opening in the first member and the surface of the wiring member. Furthermore, the top of the inner circumferential protrusion is located further in a first direction than the central plane. Compared to the case where the top is located further in a second direction than the central plane, this configuration reduces the deformation of the second elastomer caused by high pressure within the first space.

[0130] In an example (Aspect 15) according to any one of aspects 1 to 14, at least one second elastomer further includes a third retaining portion extending circumferentially around the at least one second elastomer. The sealing device has a thickness direction including a second direction. The third retaining portion extends outwardly from an end of the second outer surface positioned along the second direction. The first elastomer also includes an inclined surface disposed on an end of the first inner surface positioned along the second direction, the inclined surface being inclined such that the diameter of the inclined surface increases along the second direction.

[0131] In the aforementioned aspects, the first elastomer further includes an inclined surface disposed on an end of the first inner surface positioned in a second direction. This configuration facilitates the insertion of the second elastomer into the first opening of the first elastomer. The axial position of the second elastomer is determined when the third retaining portion of the second elastomer contacts the surface of the first elastomer.

[0132] In an example (Aspect 16) according to any one of aspects 1 to 15, at least one second elastomer includes a plurality of second elastomers. The first elastomer includes a plurality of first openings, the plurality of first openings including the first openings. The plurality of second elastomers are fixed to corresponding first openings and interconnected with each other.

[0133] In this respect, the second elastomer is fixed to a corresponding first opening. As a result, with the second elastomer disposed in the opening of the first member, the gap between the inner circumferential surface of the opening in the first member and the surface of each second member can be sealed. Furthermore, the second elastomers are interconnected. As a result, processing is easier compared to the case where each second elastomer is an independent component.

[0134] According to one aspect of this disclosure (Aspect 17), a sealing structure includes: a first member having an opening; a second member fixed within the opening; and a sealing device for sealing a gap between an inner peripheral surface of the opening in the first member and an outer surface of the second member. The sealing device includes: a first elastomer including: a first outer surface contacting an inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located within the first opening of the first elastomer and including: a second outer surface facing the first inner surface of the first elastomer in a manner that leaves a separation space; and a second inner surface contacting the outer surface of the second member. The first elastomer further includes a first protrusion extending inwardly from the first inner surface and contacting the second outer surface of the at least one second elastomer.

[0135] According to one aspect of this disclosure (Aspect 18), a sealing structure includes: a first member having an opening; a second member fixed within the opening; and a sealing device for sealing a gap between an inner peripheral surface of the opening in the first member and an outer surface of the second member. The sealing device includes: a first elastomer comprising: a first outer surface contacting an inner peripheral surface of the opening in the first member; a first opening; and a first inner surface defining the first opening; and at least one second elastomer located within the first opening and comprising: a second outer surface facing the first inner surface in a manner that leaves a separation space; and a second inner surface contacting the outer surface of the second member. The at least one second elastomer further includes a second protrusion extending outward from a second outer surface and contacting the first inner surface of the first elastomer.

[0136] Explanation of reference numerals in the attached figures 100...sealing structure, 10...base, 11...opening, 12...inner peripheral surface, 20...wiring component, 21...surface, 30...sealing device, 40...first elastomer, 41...first outer surface, 42...first inner surface, 421...inclined surface, 43...bottom surface, 44...top surface, 451...first outer peripheral protrusion, 452...second outer peripheral protrusion, 461...first retaining portion, 462...second retaining portion, 47...first Protrusion, 471... distal end, 472... proximal end, 50... second elastomer, 51... second outer surface, 52... second inner surface, 53... bottom surface, 54... top surface, 55... third retaining portion, 56... base region, 57... circumferential protrusion, 571... first inclined surface, 572... second inclined surface, 573... top, 58... second protrusion, 581... distal end, 582... proximal end, O1... first opening, O2... second opening.

Claims

1. A sealing device for sealing a gap between the inner peripheral surface of an opening in a first member and the outer surface of a second member fixed within the opening, the sealing device comprising: A first elastic body, the first elastic body comprising: A first outer surface, which contacts the inner peripheral surface of the opening in the first component; The first opening; and A first inner surface, the first inner surface defining the first opening; and At least one second elastomer, the at least one second elastomer being located within the first opening of the first elastomer and comprising: The second outer surface faces the first inner surface of the first elastomer with a separation space provided; and The second inner surface is in contact with the outer surface of the second component. The first elastomer further includes a first protrusion that extends inward from the first inner surface and contacts the second outer surface of the at least one second elastomer.

2. A sealing device for sealing a gap between the inner surface of an opening in a first member and the outer surface of a second member fixed within the opening, the sealing device comprising: A first elastic body, the first elastic body comprising: A first outer surface, which contacts the inner peripheral surface of the opening in the first component; The first opening; and A first inner surface, the first inner surface defining the first opening; and At least one second elastic body, the at least one second elastic body being located within the first opening and comprising: The second outer surface faces the first inner surface of the first elastomer with a separation space provided; and The second inner surface is in contact with the outer surface of the second component. The at least one second elastomer further includes a second protrusion that extends outward from the second outer surface and contacts the first inner surface of the first elastomer.

3. The sealing device according to claim 1 or 2, wherein, The first elastomer is made of a material different from that of the at least one second elastomer.

4. The sealing device according to claim 1 or 2, wherein, The first elastomer is made of the same material as the at least one second elastomer.

5. The sealing device according to claim 1 or 2, wherein, The hardness of the first elastomer is different from the hardness of the at least one second elastomer.

6. The sealing device according to claim 5, wherein, The hardness of at least one second elastomer is greater than the hardness of the first elastomer.

7. The sealing device according to claim 1 or 2, wherein, The second component is an electrical conductor, and The volume resistivity of at least one second elastomer is greater than that of the first elastomer.

8. The sealing device according to claim 1 or 2, wherein, The first elastomer further includes a first retaining portion and a second retaining portion, each of the first retaining portion and the second retaining portion extending outward from the first outer surface. The first outer surface is located between the first retaining portion and the second retaining portion, and The first component includes an inner edge positioned along the opening, the inner edge being located between the first retaining portion and the second retaining portion.

9. The sealing device according to claim 1 or 2, wherein, The first outer surface of the first elastomer includes at least one peripheral protrusion that extends circumferentially around the first elastomer.

10. The sealing device according to claim 1, wherein, The first protrusion of the first elastomer includes a distal end and a proximal end. The sealing device has a thickness direction including a first direction, and The distal end is located further in the first direction than the proximal end.

11. The sealing device according to claim 10, wherein, The first outer surface of the first elastomer includes a first peripheral protrusion and a second peripheral protrusion, each of the first peripheral protrusion and the second peripheral protrusion extending circumferentially outward around the first elastomer. The first peripheral protrusion and the second peripheral protrusion are spaced apart from each other along the thickness direction of the sealing device, and The distal end of the first protrusion is located further in the first direction than the central plane, the central plane being an imaginary plane equidistant from the first peripheral protrusion and the second peripheral protrusion along the thickness direction of the sealing device.

12. The sealing device according to claim 2, wherein, The second protrusion of the at least one second elastomer includes a distal end and a proximal end. The sealing device has a thickness direction including a first direction, and The distal end is located further in the first direction than the proximal end.

13. The sealing device according to claim 12, wherein, The first outer surface of the first elastomer includes a first peripheral protrusion and a second peripheral protrusion, each of the first peripheral protrusion and the second peripheral protrusion extending circumferentially outward around the first elastomer. The first peripheral protrusion and the second peripheral protrusion are spaced apart from each other along the thickness direction of the sealing device, and The distal end of the second protrusion is located further in the first direction than the central plane, the central plane being an imaginary plane equidistant from the first peripheral protrusion and the second peripheral protrusion along the thickness direction of the sealing device.

14. The sealing device according to claim 11 or 13, wherein, The second inner surface of the at least one second elastomer includes an inner circumferential protrusion extending circumferentially around the at least one second elastomer. The inner peripheral protrusion includes a top, which is located further in the first direction than the central plane.

15. The sealing device according to claim 1 or 2, wherein, The at least one second elastomer further includes a third retaining portion extending circumferentially around the at least one second elastomer. The sealing device has a thickness direction including a second direction. The third retaining portion extends outward from the end of the second outer surface positioned along the second direction, and The first elastomer further includes an inclined surface disposed on an end of the first inner surface positioned along the second direction, the inclined surface being inclined such that the diameter of the inclined surface increases along the second direction.

16. The sealing device according to claim 1 or 2, wherein, The at least one second elastic body includes a plurality of second elastic bodies. The first elastomer includes a plurality of first openings, wherein the plurality of first openings includes the first openings. The plurality of second elastic bodies are fixed to the corresponding first openings and connected to each other.

17. A sealing structure, the sealing structure comprising: A first component, the first component having an opening; The second component is fixed inside the opening; as well as A sealing device that seals the gap between the inner circumferential surface of the opening in the first component and the outer surface of the second component, wherein... The sealing device includes: A first elastic body, the first elastic body comprising: A first outer surface, which contacts the inner peripheral surface of the opening in the first component; The first opening; and A first inner surface, the first inner surface defining the first opening; and At least one second elastomer, the at least one second elastomer being located within the first opening of the first elastomer and comprising: The second outer surface faces the first inner surface of the first elastomer with a separation space provided; and The second inner surface contacts the outer surface of the second component, and The first elastomer further includes a first protrusion that extends inward from the first inner surface and contacts the second outer surface of the at least one second elastomer.

18. A sealing structure, the sealing structure comprising: A first component, the first component having an opening; The second component is fixed inside the opening; as well as A sealing device that seals the gap between the inner circumferential surface of the opening in the first component and the outer surface of the second component, wherein... The sealing device includes: A first elastic body, the first elastic body comprising: A first outer surface, which contacts the inner peripheral surface of the opening in the first component; The first opening; and A first inner surface, the first inner surface defining the first opening; and At least one second elastic body, the at least one second elastic body being located within the first opening and comprising: A second outer surface, the second outer surface facing the first inner surface with a separation space provided; and The second inner surface contacts the outer surface of the second component, and The at least one second elastomer further includes a second protrusion that extends outward from the second outer surface and contacts the first inner surface of the first elastomer.

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