mount

Abstract

To suppress the deterioration of characteristics or durability even if an elastic modulus of a spring portion is low.SOLUTION: A mount 1 is equipped with a sleeve 2, an elastic body portion 3 that is formed from an elastic body attached to the sleeve 2, and a restraining ring 4 that is an annular member attached to the elastic body portion 3. The elastic body portion 3 has an attaching portion 10, a stopper portion 20, a spring portion 30, and a sleeve holding portion 40. The stopper portion 20 is located on a supported side of the attaching portion 10, and the sleeve holding portion 40 is located on an inner peripheral side of the attaching portion 10 and the stopper portion 20. The spring portion 30 extends between the stopper portion 20 and the sleeve holding portion 40. The restraining ring 4 is attached to the stopper portion 20.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a mount, and more particularly to a mount for supporting an object.

Background Art

[0002] Conventionally, mounts have been used as devices for supporting objects. Some mounts have a function of absorbing or buffering vibrations and forces from the supporting device or the supported device. Among such mounts, mounts for supporting automotive accessories or small devices are formed only of an elastic body or formed of an elastic body and a sleeve attached to the elastic body because the objects to be supported are lightweight (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] With the recent shift towards e-mobility, devices mounted on vehicles and other equipment have become lighter. Mounts used to support these devices require a lower modulus of elasticity in the spring portion, which is responsible for vibration damping, in order to enhance vibration damping. On the other hand, mounts are attached to a support by pressing the mounting portion into a hole formed in the support. However, if the shape of the hole in the support is not a perfect circle or nearly perfect circle, such as an ellipse, the stopper portion of the mount adjacent to the mounting portion may deform. For example, when attaching a mount to a support, the stopper portion of the mount may deform when a supported device, such as a pump, attached to the mount and supported by the mount, is activated, or when a load is input from the support due to the operation of equipment or devices to which the support is attached. For example, if the support is installed on a vehicle, an external force is input from the support to the mount as the vehicle moves, which may deform the stopper portion. The stopper portion is connected to the spring portion, and when the stopper portion deforms, the spring portion, which has a low modulus of elasticity, may bend. When the spring portion undergoes bending deformation, the dynamic and static spring constants of the elastic body may deviate from the desired values, causing the elastic body to deviate from its desired properties and potentially preventing the mount from performing its intended function. Furthermore, bending deformation of the spring portion can cause stress concentration, potentially reducing the durability of the spring portion. For this reason, there is a need for a configuration that can suppress the deterioration of the mount's properties and durability even when the elastic modulus of the spring portion is low.

[0005] The object of the present invention is to provide a mount that can suppress a decrease in performance and durability even when the elastic modulus of the spring is low. [Means for solving the problem]

[0006] To solve the above problems, the mount according to the present invention comprises a sleeve which is a cylindrical member extending along an axis, an elastic body portion formed from an elastic body attached to the sleeve, and a restraining ring which is an annular member around the axis attached to the elastic body portion, wherein the elastic body portion has a mounting portion which is an annular part around the axis, a stopper portion which is an annular part around the axis, a spring portion which is an annular part around the axis, and a sleeve holding portion which is a part that holds the sleeve, wherein the stopper portion is located on one side in the axial direction from the mounting portion, the sleeve holding portion is located on the inner circumference side of the mounting portion and the stopper portion, the spring portion extends between the stopper portion and the sleeve holding portion, and the restraining ring is attached to the stopper portion.

[0007] In a mount according to one aspect of the present invention, the stopper portion has a housing portion which is an annular recess capable of accommodating the restraint ring, and the restraint ring is housed in the housing portion.

[0008] In a mount according to one aspect of the present invention, the restraining ring is fixed to the housing portion of the stopper portion.

[0009] In a mount according to one aspect of the present invention, the restraining ring is detachably housed in the housing portion of the stopper portion.

[0010] In a mount according to one aspect of the present invention, the spring portion has a bent portion which is a portion that bends convexly to one side in the axial direction, and the spring portion forms an annular space on its outer circumference with the stopper portion that opens to one side in the axial direction, and forms an annular space on its inner circumference with the sleeve holding portion that opens to one side in the axial direction. [Effects of the Invention]

[0011] According to the mount of the present invention, even if the elastic modulus of the spring portion is low, a decrease in performance and durability can be suppressed. [Brief explanation of the drawing]

[0012] [Figure 1] This is an exploded perspective view of a mount according to the first embodiment of the present invention, cut along the axis. [Figure 2] This is a cross-sectional view along the axis of the mount shown in Figure 1. [Figure 3] This is a partially enlarged cross-sectional view showing the vicinity of the stopper and spring portions of the mount shown in Figure 1. [Figure 4] Figure 1 is a perspective view of the mounting restraint ring. [Figure 5] This figure shows the usage status of the mount shown in Figure 1. [Figure 6] Figure 5 is a cross-sectional view showing the mount in its bottomed-out state during use. [Figure 7] Figure 5 shows an example of the shape of the through-hole in the support material. [Figure 8] This figure shows an example of a modification of a conventional mount. [Figure 9] This is an exploded perspective view of a mount according to a second embodiment of the present invention, cut along the axis. [Figure 10] Figure 9 shows a cross-sectional view along the axis of the mount. [Figure 11] Figure 9 is a magnified cross-sectional view showing the vicinity of the stopper and spring portions of the mount. [Figure 12] Figure 9 is a perspective view of the mounting restraint ring. [Modes for carrying out the invention]

[0013] Embodiments of the present invention will be described below with reference to the drawings.

[0014] FIG. 1 is an exploded perspective view of the mount 1 according to an embodiment of the present invention cut along a cross-section along the axis x, and FIG. 2 is a cross-sectional view in a cross-section along the axis x of the mount 1 according to an embodiment of the present invention. The mount according to the present invention is, for example, supported by a vehicle and used to support accessories or the like of the vehicle. The application target of the mount according to the present invention is not limited to vehicles.

[0015] Hereinafter, for convenience of explanation, in the axial direction of the axis x, the side in the direction of arrow a (see FIG. 2) (one side in the axial direction) is defined as the supported side, and the side in the direction of arrow b (see FIG. 2) (the other side in the axial direction) in the axial direction of the axis x is defined as the supporting side. More specifically, the supported side is the side of the supported object such as an accessory supported by the mount 1, and the supporting side is the side of the support body that supports the mount 1 such as an engine or a vehicle frame. Also, in the direction perpendicular to the axis x (hereinafter also referred to as the "radial direction"), the side in the direction away from the axis x (the direction of arrow c in FIG. 2) is defined as the outer peripheral side, and the side in the direction approaching the axis x (the direction of arrow d in FIG. 2) is defined as the inner peripheral side. Note that the axis x is a virtual line.

[0016] As shown in FIGS. 1 and 2, the mount 1 includes a sleeve 2 which is a cylindrical member extending along the axis x, an elastic body portion 3 formed of an elastic body attached to the sleeve 2, and a restraint ring 4 which is an annular member attached to the elastic body portion 3 around the axis x. The elastic body portion 3 has a mounting portion 10 which is an annular portion around the axis x, a stopper portion 20 which is an annular portion around the axis x, a spring portion 30 which is an annular portion around the axis x, and a sleeve holding portion 40 which is a portion for holding the sleeve 2. The stopper portion 20 is located on the supported side (one side in the axial direction of the axis x) (the side in the direction of arrow a in FIG. 2) rather than the mounting portion 10, and the sleeve holding portion 40 is located on the inner peripheral side of the mounting portion 10 and the stopper portion 20. The spring portion 30 extends between the stopper portion 20 and the sleeve holding portion 40. The restraint ring 4 is attached to the stopper portion 20. Hereinafter, the mount 1 will be specifically described.

[0017] The sleeve 2 is a cylindrical member extending along the axis x and is made of, for example, metal. As shown in FIGS. 1 and 2, the sleeve 2 is a cylindrical or substantially cylindrical member having, for example, the axis x as the central axis or substantially central axis. As will be described later, a fixing mechanism for fixing the supported body to the mount 1 is attached inside the sleeve 2. The fixing mechanism is, for example, a bolt and a nut. The bolt penetrates the supported body, passes through the sleeve 2, and a nut is screwed onto this bolt, so that the bolt and the nut are fixed to the sleeve 2 and the supported body is fixed to the sleeve 2.

[0018] The attachment portion 10 is, for example, an annular portion having the axis x as the central axis or substantially central axis as shown in FIGS. 1 and 2, and extends along, for example, a virtual line that draws a circle centered on the axis x. The attachment portion 10 has, for example, a tapered surface 11 on the outer peripheral side of the end on the support side. The tapered surface 11 is a surface that tapers toward the support side and is, for example, a conical surface or a substantially conical surface having the axis x as the central axis or substantially central axis. The attachment portion 10 has an outer peripheral surface 12 that is a cylindrical surface extending from the end on the supported side of the tapered surface 11 toward the supported side, and also has a clamping surface 13 that is a surface extending from the end on the supported side of the outer peripheral surface 12 toward the inner peripheral side. The clamping surface 13 is an annular surface and is, for example, parallel or substantially parallel to a virtual plane orthogonal to the axis x.

[0019] Further, as shown in FIGS. 1 and 2, the attachment portion 10 has a groove bottom surface 14 that is a cylindrical surface extending from the end on the inner peripheral side of the clamping surface 13 toward the supported side. The groove bottom surface 14 is, for example, a cylindrical surface or a substantially cylindrical surface having the axis x as the central axis or substantially central axis as shown in FIG. 2. The attachment portion 10 also has an inner peripheral surface 15 that is a surface facing the inner peripheral side. The inner peripheral surface 15 is a cylindrical surface extending along the axis x as shown in FIG. 2. The inner peripheral surface 15 is, for example, a cylindrical surface or a substantially cylindrical surface having the axis x as the central axis or substantially central axis. Further, the inner peripheral surface 15 is, for example, a surface that tapers toward the supported side and is, for example, a conical surface or a substantially conical surface having the axis x as the central axis or substantially central axis. An annular end face 16 extends at the end on the support side of the attachment portion 10.

[0020] The stopper portion 20 is an annular portion with axis x as its central axis or approximate central axis, as shown in Figures 1 and 2, for example, extending along a virtual line that draws a circle centered on axis x. The stopper portion 20 has a contact surface 21, which is an annular surface extending outward from the supported end of the groove bottom surface 14 of the mounting portion 10. The contact surface 21 is an annular surface, which is, for example, parallel or approximately parallel to a virtual plane perpendicular to axis x. The contact surface 21 faces the clamping surface 13 of the mounting portion 10 in its inner circumference portion, and the contact surface 21 extends outward from the clamping surface 13 of the mounting portion 10. The stopper portion 20 also has an outer circumference surface 22, which is a cylindrical surface extending from the outer circumference end of the contact surface 21 towards the supported side, and a stopper surface 23, which is a surface extending inward from the supported end of the outer circumference surface 22. The stopper surface 23 is an annular surface, and is, for example, parallel or substantially parallel to a virtual plane perpendicular to the axis x.

[0021] Furthermore, the stopper portion 20 has an inner circumferential surface 24 that extends from the inner circumferential surface 15 of the mounting portion 10 and faces the inner circumferential side. The inner circumferential surface 24 is smoothly connected to the inner circumferential surface 15. As shown in Figure 2, the inner circumferential surface 24 is a cylindrical surface that extends along the axis x. The inner circumferential surface 24 is, for example, a surface that decreases in diameter towards the supported side, and is, for example, a conical surface or a substantially conical surface with axis x as the central axis or substantially the central axis. Alternatively, the inner circumferential surface 24 is, for example, a cylindrical surface or a substantially cylindrical surface with axis x as the central axis or substantially the central axis. As shown in Figure 2, in the stopper portion 20, the inner circumferential surface 24 is the portion that faces radially backward from the support-side portion of the outer circumferential surface 22.

[0022] Furthermore, the stopper portion 20 has an outer inner circumferential surface 25 that extends from the inner circumferential end of the stopper surface 23 toward the support side and faces the inner circumferential side. As shown in Figure 2, the outer inner circumferential surface 25 is a cylindrical surface that extends along the axis x. The outer inner circumferential surface 25 is, for example, a surface that decreases in diameter toward the support side, and is, for example, a conical surface or a substantially conical surface with axis x as its central axis or substantially central axis. Alternatively, the outer inner circumferential surface 25 is, for example, a cylindrical surface or a substantially cylindrical surface with axis x as its central axis or substantially central axis. As shown in Figure 2, in the stopper portion 20, the outer inner circumferential surface 25 is the portion that faces radially backward from the supported side portion of the outer circumferential surface 22.

[0023] As described above, the mounting portion 10 and the stopper portion 20 are connected, and the boundary line L1 shown by the dashed line in Figure 2 is the boundary between the mounting portion 10 and the stopper portion 20 in cross-section. Note that the boundary line L1 is a hypothetical line. In other words, the mounting portion 10 and the stopper portion 20 are integrally connected by the portion between the supported end of the groove bottom surface 14 of the mounting portion 10 and the supported end of the inner circumferential surface 15, and the portion between the inner circumferential end of the contact surface 21 of the stopper portion 20 and the supporting end of the inner inner circumferential surface 24.

[0024] As described above, a restraining ring 4 is attached to the stopper portion 20. The stopper portion 20 has a receiving portion 26, which is an annular recess capable of accommodating the restraining ring 4, and the restraining ring 4 is housed in this receiving portion 26. More specifically, the restraining ring 4 is fixed to the receiving portion 26. For example, the restraining ring 4 is bonded and fixed to the receiving portion 26 by vulcanization bonding. The vulcanization bonding of the restraining ring 4 and the receiving portion 26 is performed, for example, during the vulcanization molding of the elastic body portion 3. In other words, the elastic body portion 20 and the restraining ring 4 become one during the vulcanization molding of the elastic body portion 20.

[0025] Figure 3 is a partially enlarged cross-sectional view showing the vicinity of the stopper portion 20 and spring portion 30 of the mount 1. The housing portion 26 is, for example, an annular groove recessed inward from the outer peripheral surface 22 of the stopper portion 20, as shown in Figures 1 to 3, and is designed to form a space corresponding to the restraint ring 4. The housing portion 26 is open to the outer peripheral surface 22. The housing portion 26 is, for example, designed to form a rectangular or substantially rectangular space in cross-section, and as shown in Figure 3, has a supported side surface 26a and a supporting side surface 26b, which are opposing surfaces in the axial x direction, and a bottom surface 26c, which is the bottom of the housing portion 26 and connects to the supported side surface 26a and the supporting side surface 26b at their respective inner peripheral ends. As described above, the elastic body portion 20 and the restraint ring 4 are integrated during the vulcanization molding of the elastic body portion 3, and the restraint ring 4 is vulcanized and bonded to the elastic body portion 20, so the shape of the housing portion 26 corresponds to the shape of the restraint ring 4.

[0026] The supported side surface 26a is, for example, an annular surface extending parallel or substantially parallel to a plane perpendicular to axis x, specifically, for example, an annular or substantially annular surface with axis x as its center or substantially its center. Furthermore, the radial width of the cross-section of the supported side surface 26a is constant or substantially constant along the circumferential extension direction of the supported side surface 26a. The supporting side surface 26b has a similar shape to the supported side surface 26a, and the supporting side surface 26b is, for example, an annular surface extending parallel or substantially parallel to a plane perpendicular to axis x, specifically, for example, an annular or substantially annular surface with axis x as its center or substantially its center. Furthermore, the radial width of the cross-section of the supporting side surface 26b is constant or substantially constant along the circumferential extension direction of the supporting side surface 26b. Furthermore, the base surface 26c is, for example, a cylindrical surface extending along the axis x, specifically, for example, a cylindrical or substantially cylindrical surface with the axis x as the central axis or substantially the central axis. Also, the width in the axial x direction in the cross-section of the base surface 26c is, for example, constant or substantially constant along the circumferential extension direction of the base surface 26c.

[0027] The sleeve holding portion 40 is the part that holds the sleeve 2 on its outer circumference, and is attached to the entire outer surface 2a of the sleeve 2, for example, as shown in Figure 2. The sleeve holding portion 40 may also be attached to a part of the outer surface 2a of the sleeve 2. The sleeve holding portion 40 is attached to the sleeve 2, for example, by adhesive. The sleeve 2 may be press-fitted into the sleeve holding portion 40. Furthermore, the thickness of the sleeve holding portion 40 increases towards the support side, for example, as shown in Figure 2. Note that thickness refers to the thickness in the radial direction.

[0028] The spring portion 30 has, for example, a bent portion 31 that bends convexly toward the supported side, and is an annular, membrane-like portion that bends to protrude toward the supported side. Furthermore, the spring portion 30 forms an outer peripheral space G1, which is an annular space open toward the supported side, between itself and the stopper portion 20 on the outer peripheral side (the side in the direction of arrow c in Figure 2), and forms an inner peripheral space G2, which is an annular space open toward the supported side, between itself and the sleeve holding portion 40 on the inner peripheral side.

[0029] The spring portion 30 has, for example, as shown in Figures 1 and 2, an outer circumferential cylindrical portion 32 located on the outer circumference and an inner circumferential cylindrical portion 33 located on the inner circumference of the outer circumferential cylindrical portion 32. The outer circumferential cylindrical portion 32 is integrally connected to the outer circumferential end of the bent portion 31 at the end on the supported side, and the inner circumferential cylindrical portion 33 is integrally connected to the inner circumferential end of the bent portion 31 at the end on the supported side. Furthermore, the outer circumferential cylindrical portion 32 is integrally connected to the stopper portion 20 at the end on the supporting side, and the inner circumferential cylindrical portion 33 is integrally connected to the sleeve holding portion 40 at the end on the supporting side.

[0030] In Figure 2, the boundary line L2, shown by a dashed line, represents the boundary between the stopper portion 20 and the spring portion 30 in cross-section. That is, for example, the portion between the supported end of the inner circumferential surface 24 of the stopper portion 20 and the supporting end of the outer circumferential surface 25 of the stopper portion 20, and the supporting end of the outer circumferential cylindrical portion 32 of the spring portion 30, are integrally connected to the stopper portion 20 and the spring portion 30. Also, the boundary line L3, shown by a dashed line in Figure 2, represents the boundary between the sleeve holding portion 40 and the spring portion 30 in cross-section. For example, the supporting end of the inner circumferential cylindrical portion 33 of the spring portion 30 is integrally connected to the portion of the outer circumferential surface 41 of the sleeve holding portion 40, on the supporting side of the center in the axial x direction of the sleeve holding portion 40. Furthermore, as shown in Figure 2, for example, the boundary line L2 between the stopper portion 20 and the spring portion 30 and the boundary line L3 between the sleeve holding portion 40 and the spring portion 30 are opposite each other in the radial direction, and their positions in the axial x direction are the same or close together. Note that boundary lines L2 and L3 are hypothetical lines.

[0031] As shown in Figure 3, the outer cylindrical portion 32 of the spring portion 30 decreases in diameter towards the supported side, and, except for the transition portion 32a which connects to the stopper portion 20, it is a conical or approximately conical shape with axis x as the central axis or approximately the central axis. This conical or approximately conical portion (rising portion 32b) has a constant or approximately constant thickness over the entire extension direction. The thickness of the rising portion 32b is the width of the rising portion 32b in the direction perpendicular to the extension direction of the rising portion 32b in the cross-section shown in Figure 3. As shown in Figures 2 and 3, in the cross-section, the rising portion 32b is inclined toward the axis x side (inner circumference side) toward the supported portion side. The shape of the rising portion 32b is not limited to the shape described above and may be other shapes. For example, the rising portion 32b may be parallel or approximately parallel to axis x in the cross-section, and may be inclined toward the outer circumference side toward the supported portion side. Furthermore, the rising portion 32b may extend along a curve in cross-section.

[0032] As shown in Figure 3, the inner circumferential cylindrical portion 33 of the spring portion 30 expands in diameter towards the supported side, and, for example, except for the transition portion 33a which connects to the sleeve holding portion 40, it is a conical or substantially conical cylindrical shape with axis x as the central axis or substantially the central axis. This conical or substantially conical cylindrical portion (rising portion 33b) has a constant or substantially constant thickness over the entire extension direction. The thickness of the rising portion 33b is the width of the rising portion 33b in the direction perpendicular to the extension direction of the rising portion 33b in the cross-section shown in Figure 3. As shown in Figures 2 and 3, in the cross-section, the rising portion 33b is inclined outward toward the supported side. The shape of the rising portion 33b is not limited to the shape described above and may be other shapes. For example, the rising portion 33b may be parallel or substantially parallel to axis x in the cross-section, and may be inclined inward toward the supported portion. Furthermore, the rising portion 33b may extend along a curve in cross-section.

[0033] As shown in Figure 3, the transition portion 32a of the outer circumferential cylindrical portion 32 of the spring portion 30 is smoothly connected to the stopper portion 20. For example, the inner circumferential surface of the transition portion 32a is flush with the inner circumferential surface 24 of the stopper portion 20. Also, for example, the outer circumferential side surface 32c, which is the surface facing the outer circumferential side of the transition portion 32a, is a curved surface that curves inward toward the support side in cross-section, as shown in Figure 3, and the curvature in cross-section increases from the rising portion 32b side. For example, the curve drawn by the outer circumferential side surface 32c of the transition portion 32a in the cross-section shown in Figure 3 is made up of multiple curves, each with a different curvature, and the curvature of the curve increases from the rising portion 32b side. For example, the curve drawn by the outer circumferential side surface 32c of the transition portion 32a in the cross-section shown in Figure 3 consists of two curves, each with a different curvature, and the curvature of the curve on the rising portion 32b side is smaller than the curvature of the curve on the outer circumferential surface 25 side of the stopper portion 20. The transition surface 25a, which is the part of the outer inner circumferential surface 25 of the stopper portion 20 that connects to the outer cylindrical portion 32, is a curved surface that, in cross-section, is recessed towards the support side, as shown in Figure 3, for example.

[0034] As shown in Figure 3, the transition portion 33a of the inner circumferential cylindrical portion 33 of the spring portion 30 smoothly connects to the outer circumferential surface 41 of the sleeve holding portion 40. For example, the outer circumferential surface of the transition portion 33a is a curved surface that curves inward toward the supported side in cross-section, as shown in Figure 3, and smoothly connects to the outer circumferential surface 41 of the sleeve holding portion 40. Also, for example, the inner circumferential side surface 33c, which is the surface facing the inner circumferential side of the transition portion 33a, is a curved surface that curves inward toward the supported side in cross-section, as shown in Figure 3, and the curvature in cross-section is constant. The transition surface 41a, which is the part of the outer circumferential surface 41 of the sleeve holding portion 40 that connects to the inner circumferential cylindrical portion 33, is a curved surface that curves inward toward the supported side in cross-section, as shown in Figure 3.

[0035] In the spring portion 30, as described above, the bent portion 31 is connected to the rising portion 32b of the outer peripheral cylindrical portion 32 on the outer peripheral side, and to the rising portion 33b of the inner peripheral cylindrical portion 33 on the inner peripheral side. Furthermore, the thickness of the rising portion 32b on the outer peripheral side is greater than the thickness of the rising portion 33b on the inner peripheral side. Therefore, the thickness of the outer peripheral end of the bent portion 31 is greater than the thickness of the inner peripheral end of the bent portion 31. For example, the thickness of the bent portion 31 gradually increases from the inner peripheral end to the outer peripheral end. Specifically, for example, the inner surface 31a, which is the surface of the bent portion 31 facing the support side, is a curved surface that draws a curve with a constant curvature in cross-section, as shown in Figure 3. Similarly, the outer surface 31b, which is the surface of the bent portion 31 facing the supported side, is a curved surface that draws a curve with a constant curvature in cross-section, as shown in Figure 3. Furthermore, the curvature of the inner surface 31a in cross-section is greater than the curvature of the outer surface 31b in cross-section.

[0036] As described above, the inner surface 31a of the bent portion 31 of the spring portion 30 is recessed toward the supported side, and the spring portion 30 forms a spring portion space G3, which is an annular space that opens toward the supported side. In addition, the inner circumferential surface 24 of the stopper portion 20 faces the outer circumferential surface 41 of the sleeve holding portion 40 and forms an annular space G4 between it and the outer circumferential surface 41, and the inner circumferential surface 15 of the mounting portion 10 faces the outer circumferential surface 41 of the sleeve holding portion 40 and forms an annular space G5 between it and the outer circumferential surface 41. The spring portion space G3 is in communication with space G4, and space 4 is in communication with space G5, and the spring portion space G3, space G4, and space G5 form an annular space that opens toward the supported side.

[0037] Furthermore, as shown in Figure 3, the end of the outer surface 31b of the bent portion 31 of the spring portion 30 that is supported in the axial x direction (tip 31c) is located on the supported side in the axial x direction more than the stopper surface 23, which is the supported end of the stopper portion 20. Also, as shown in Figure 2, the end of the sleeve 2 that is supported in the axial x direction (tip 2b) is located on the supported side in the axial x direction more than the tip 31c of the outer surface 31b of the bent portion 31 of the spring portion 30. In this way, the spring portion 30 is surrounded by the stopper portion 20 and the sleeve holding portion 40, and an annular outer peripheral space G1 that opens to the supported side is formed between the stopper portion 40 and the spring portion 30, and an annular inner peripheral space G2 that opens to the supported side is formed between the spring portion 30 and the sleeve holding portion 40.

[0038] As shown in Figures 1-3, in the free state of mount 1 where no external force is applied, the rear end 2c, which is the support-side end of sleeve 2, does not protrude beyond the end face 16 of the mounting portion 10, for example, and is located within the space G5. However, in the free state of mount 1, the rear end 2c, which is the support-side end of sleeve 2, may protrude beyond the end face 16 of the mounting portion 10.

[0039] As described above, the mounting portion 10 has a clamping surface 13 and a groove bottom surface 14, and the stopper portion 20 has a contact surface 21. The contact surface 21 is connected to the supported end of the groove bottom surface 14 at its inner circumference end. In this way, the clamping surface 13, the groove bottom surface 14, and the contact surface 21 form a mounting groove 5, which is an annular groove that is recessed inward, and the mount 1 has a mounting groove 5 between the mounting portion 10 and the stopper portion 20. As will be described later, the mounting groove 5 is designed so that a member of the support body on which the mount 1 is supported fits into the mounting groove 5, thereby fixing the mount 1 to the support body.

[0040] As described above, in the free state of mount 1, as shown in Figure 2, the tip 2b of sleeve 2 is located on the supported side in the axial x direction more than the tip 31c of spring portion 30, and the tip 31c of spring portion 30 is located on the supported side in the axial x direction more than the stopper surface 23 of stopper portion 20. In the usage state of mount 1 described later, in the bottom state where the supported object supported by mount 1 is in contact with the stopper surface 23 of stopper portion 20, the end of spring portion 30 on the supported side in the axial x direction does not come into contact with the supported object. For example, as shown in Figure 2, in the free-state mount 1, if distance a is the distance in the axial x direction between the end g1 of the outer peripheral space G1 between the spring portion 30 and the stopper portion 20 and the stopper surface 23 of the stopper 20, distance b is the distance in the axial x direction between the tip 31c of the spring portion 30 and the end g1 of the outer peripheral space G1, and distance S is the distance in the axial x direction between the tip 2b of the sleeve 2 and the stopper surface 23 of the stopper portion 20, then distances a, b, and S are set to satisfy the following equation (1). Note that end g1 is the support-side end of the outer peripheral space G1 in the axial x direction, and is, for example, the part where the outer peripheral side surface 32c of the transition portion 32a of the outer peripheral cylindrical portion 32 connects to the transition surface 25a of the outer inner peripheral surface 25.

[0041] (Math 1) b

[0042] ​When the sleeve 2 and the sleeve holding part 40 move to the support side due to the load from the supported body in the usage state of the mount 1, the transition part 33a of the spring part 30 is pulled to the support side, the spring part 30 is deformed, and an elastic force is generated. The elastic force generated by the deformation of the spring part 30 acts on the load from the supported body, a buffering function is exerted, and the displacement of the supported body is suppressed. The spring part 30 has the shape as described above, that is, it continues from the sleeve holding part 40 side with a cylindrical inner peripheral side cylinder part 33, a bent part 31 bent convexly toward the supported side, and a cylindrical outer peripheral side cylinder part 32. When the transition part 33a is pulled, the bent part 31 is first deformed so as to be further bent. As a result, for example, the curvature in the cross section shown in FIG. 3 of the inner surface 31a of the bent part 31 increases, and the tip in the axial direction x of the bent part 31 is displaced to the outer peripheral side in the radial direction from the position of the tip 31c in the free state and is displaced to the support side in the axial direction x.

[0043] Assuming that the bent part 31 of the spring part 30 is a bent part that bends 180°, when the sleeve 2 moves s to the support side in the axial direction x, the tip in the axial direction x of the bent part 31 moves s / 2 to the support side in the axial direction x. In this assumed case, when the sleeve 2 moves a distance S to the support side in the axial direction x and reaches the bottom state, the tip in the axial direction x of the bent part 31 is at a position that has moved S / 2 to the support side in the axial direction x. In this assumed case, in order to prevent the spring part 30 from contacting the supported body in the bottom state, in the mount 1 in the natural state, b - S / 2 < a must hold. That is, it is necessary to satisfy the above formula (1). Based on the condition for preventing the spring part 30 from contacting the supported body in the bottom state in this assumed case, in this mount 1 as well, in the natural state of the mount 1, it has a shape that satisfies the formula (1). In the mount 1 that satisfies the formula (1) in the natural state, the form of the bent part 31 such as the curvature of the bent part 31 is a form such that the spring part 30 does not contact the supported body in the bottom state.

[0044] As described above, the spring portion 30 has a bent portion 31, and the spring portion 30 is in contact with the annular outer peripheral space G1 on its outer circumference and with the annular inner peripheral space G2 on its inner circumference. Therefore, the elastic force of the spring portion 30 can be reduced, and the elastic force of the spring portion 30 is low. For example, compared to a mount having a spring portion in which the bent portion 31 extends from the stopper surface 23 of the stopper portion 20 without having an outer peripheral cylindrical portion 32, the mount 1 can have a lower modulus of elasticity. In addition, the thickness of the bent portion 31 is thicker on the outer circumference, and the thickness of the outer peripheral cylindrical portion 32 is also thicker, so in the bottom state, the outer peripheral portion of the spring portion 30, which has a strong elastic force, undergoes elastic deformation, and creep is suppressed from occurring in the inner peripheral portion of the spring portion 30, such as the inner peripheral cylindrical portion 33.

[0045] As described above, the elastic body portion 3 has a mounting portion 10, a stopper portion 20, a spring portion 30, and a sleeve holding portion 40. However, the elastic body portion 3 is integrally formed from the same material, and the mounting portion 10, the stopper portion 20, the spring portion 30, and the sleeve holding portion 40 are each part of the integrally formed elastic body portion 3.

[0046] Figure 4 is a perspective view of the restraint ring 4. As shown in Figure 4, the restraint ring 4 is a cylindrical member extending along axis x, for example, a cylindrical or substantially cylindrical member with axis x as its central axis or substantially its central axis. The restraint ring 4 is also, for example, a member made of metal. The restraint ring 4 is not limited to metal and may be made of other materials such as resin. As shown in Figure 4, the restraint ring 4 has, for example, an inner circumferential side surface 4a which faces the inner circumference, an outer circumferential side surface 4b which faces the outer circumference, a supported side surface 4c which connects to the supported ends of the inner circumferential side surface 4a and the outer circumferential side surface 4b, and a supporting side surface 4d which connects to the supported ends of the inner circumferential side surface 4a and the outer circumferential side surface 4b.

[0047] The inner circumferential surface 4a is, for example, a cylindrical surface extending along axis x, specifically, for example, a cylindrical or substantially cylindrical surface with axis x as the central axis or substantially the central axis. Furthermore, the width in the axial x direction in the cross-section of the inner circumferential surface 4a is constant or substantially constant over the circumferential extension direction of the inner circumferential surface 4a. The outer circumferential surface 4b has a similar shape to the inner circumferential surface 4b. In the restraint ring 4, the inner circumferential surface 4a and the outer circumferential surface 4b face away from each other. The outer circumferential surface 4b is, for example, a cylindrical surface extending along axis x, specifically, for example, a cylindrical or substantially cylindrical surface with axis x as the central axis or substantially the central axis. Furthermore, the width in the axial x direction in the cross-section of the outer circumferential surface 4b is constant or substantially constant over the circumferential extension direction of the outer circumferential surface 4b.

[0048] The supported side surface 4c is, for example, an annular surface extending parallel or substantially parallel to a plane perpendicular to axis x, specifically, for example, an annular or substantially annular surface with axis x as its center or substantially its center. Furthermore, the radial width of the cross-section of the supported side surface 4c is constant or substantially constant along the circumferential extension direction of the supported side surface 4c. The supporting side surface 4d has a similar shape to the supported side surface 4c, and in the restraining ring 4, the supported side surface 4c and the supporting side surface 4d face away from each other. The supporting side surface 4d is, for example, an annular surface extending parallel or substantially parallel to a plane perpendicular to axis x, specifically, for example, an annular or substantially annular surface with axis x as its center or substantially its center. Furthermore, the radial width of the cross-section of the supporting side surface 4d is constant or substantially constant along the circumferential extension direction of the supporting side surface 4d.

[0049] As described above, the restraint ring 4 is vulcanized and bonded to the elastic body portion 20, and the restraint ring 4 is embedded in the housing portion 26 of the stopper portion 20 and is at least partially covered by the housing portion 26. For example, within the housing portion 26, the inner circumferential side surface 4a of the restraint ring 4 is in contact with the bottom surface 26c of the housing portion 26, the supported side surface 4c of the restraint ring 4 is in contact with the supported side surface 26a of the housing portion 26, and the supporting side surface 4d of the restraint ring 4 is in contact with the supporting side surface 26b of the housing portion 26. Also, for example, in the restraint ring 4 housed within the housing portion 26, the outer circumferential side surface 4b is flush or substantially flush with the outer circumferential surface 22 of the stopper portion 20.

[0050] The cross-sectional shape of the restraint ring 4 is, for example, a rectangle or a roughly rectangular shape. As described above, the cross-sectional shape of the space created by the housing portion 26 of the stopper portion 20 corresponds to the cross-sectional shape of the restraint ring 4 and is a rectangle or a roughly rectangular shape. However, the cross-sectional shape of the restraint ring 4 is not limited to the shape described above. The cross-sectional shape of the restraint ring 4 may be other shapes. Similarly, the cross-sectional shape of the space created by the housing portion 26 of the stopper portion 20 is not limited to a rectangle or a roughly rectangular shape, but will be a shape corresponding to the cross-sectional shape of the restraint ring 4. In addition, although the restraint ring 4 is attached to the stopper portion 20 such that its outer peripheral side surface 4b is exposed from the stopper portion 20, the entire restraint ring 4 may be embedded within the stopper portion 20.

[0051] As shown in Figure 4, the thickness of the restraint ring 4 is T1, and the height of the restraint ring 4 is H1. The thickness T1 is the radial dimension of the restraint ring 4, and the height H1 is the axial dimension of the restraint ring 4 in the x-direction. The restraint ring 4 enhances the reaction force of the stopper portion 20, as will be described later. The magnitude of the reaction force of the stopper portion 20 enhanced by the restraint ring 4 can be adjusted by the shape of the restraint ring 4. For example, the magnitude of the reaction force of the stopper portion 20 enhanced by the restraint ring 4 can be adjusted by adjusting the thickness T1 and height H1 of the restraint ring 4. The reaction force of the stopper portion 20 is the force that the stopper portion 20 exerts on the support in opposition to the force received by the support when the support comes into contact with the stopper surface 23 of the stopper portion 20 in the usage state described later.

[0052] As described above, a restraining ring 4 is attached to the stopper portion 20 of the mount 1, increasing the rigidity of the stopper portion 20. Therefore, deformation of the stopper portion 20 when an external force is applied to the mounting portion 10 or the stopper portion 20 is suppressed, thereby preventing deformation of the spring portion 30. In addition, the restraining ring 4 increases the reaction force of the stopper portion 20, suppressing deformation of the stopper portion 20 in response to external forces applied to the stopper surface 23.

[0053] Next, the operation of the mount 1 having the above-described configuration will be explained. Figure 5 shows the state of use of the mount 1, in which the mount 1 is fixed to the support 60 and the supported object 50 is supported by the mount 1. The supported object 50 is, for example, a device such as a vacuum pump used in a vehicle, and the support 60 is, for example, the frame or other components of the vehicle body. The supported object 50 is not limited to a device such as a vacuum pump used in a vehicle, and the support 60 is not limited to the frame or other components of the vehicle body.

[0054] Mount 1 is fixed to the support 60 by press-fitting its mounting portion 10 into the through-hole 63 of the support 60, which then enters the mounting groove 5 of the mount 1, and the portion of the support 60 near the through-hole 63 is housed in the mounting groove 5. Since a tapered surface 11 is formed on the support side of the mounting portion 10, the tapered surface 11 acts as a guide for press-fitting the mounting portion 10 into the through-hole 63, making press-fitting of the mounting portion 10 into the through-hole 63 easier. As shown in Figure 5, in the usage state in which the mount 1 is fixed to the support 60, the contact surface 21 of the stopper portion 20 of the mount 1 contacts the support surface 61, which is the supported side of the support 60, and the mount 1 is supported by the support 60. In addition, the clamping surface 13 of the mounting portion 10 faces the back surface 62, which is the support side of the support 60. This prevents the mount 1, which is attached to the support 60, from coming off the support 60. The clamping surface 13 of the mounting groove 4 may press against the back surface 62 of the support 60, or the clamping surface 13 may face the back surface 62 with a gap in between. As described above, the contact surface 21 of the mounting groove 4 extends further outward than the clamping surface 13, and the surface area of ​​the contact surface 21 is larger than the surface area of ​​the clamping surface 13. This stabilizes the support of the mount 1 by the support 60. On the other hand, the smaller surface area of ​​the clamping surface 13 facilitates insertion into the through hole 63 of the mounting portion 10.

[0055] A restraining ring 4 is attached to the stopper portion 20, increasing its rigidity and making it less prone to deformation. Therefore, even if a large load is applied to the mount 1 from the supported structure 50, the stopper portion 20 is less likely to come out of the through hole 63 in the support structure 60.

[0056] The supported object 50 is fixed to the sleeve 2 by inserting a bolt 70, which is an example of a fixing mechanism, into a through hole 53 of the supported object 50, inserting the bolt 70 into the sleeve 2 from the supported side, and screwing a nut 71, which is an example of a fixing mechanism, onto the bolt 70 on the supporting side, thereby fixing the bolt 70 and nut 71 to the sleeve 2 and fixing the supported object 50 to the sleeve 2. As shown in Figure 5, in the state of use, the supporting side surface 51 of the supported object 50 is in contact with the tip 2b of the sleeve 2, the fastening surface of the bolt 70 is in contact with the supported side surface 52 of the supported object 50, the supported object 50 is pressed between the bolt 70 and the sleeve 2 and fixed to the mount 1.

[0057] Figure 6 is a cross-sectional view showing the mount 1 in its bottom state, where the supported object 50 is in contact with the stopper surface 23 of the stopper portion 20 during use. As described above, the mount 1 is configured such that the stopper portion 20, the spring portion 30, and the sleeve holding portion 40 satisfy the relationship of equation (1) above. Therefore, even in the bottom state, as shown in Figure 6, the spring portion 30 does not come into contact with the surface 52 of the supported object 50 and is not pushed toward the support side. This prevents large stresses from occurring in the outer cylindrical portion 32 of the spring portion 30 and the connection between the stopper portion 20 and the spring portion 30, prevents large distortions from occurring, and suppresses creep in the outer cylindrical portion 32 of the spring portion 30 and the connection between the stopper portion 20 and the spring portion 30. Furthermore, this prevents large stresses from occurring at the connection points between the spring portion 30 and the outer cylindrical portion 32 of the spring portion 30 or the stopper portion 20, thereby preventing large distortions from occurring and suppressing the occurrence of cracks at the connection points between the spring portion 30 and the outer cylindrical portion 32 of the spring portion 30 or the stopper portion 20.

[0058] Furthermore, as described above, the spring portion 30 has a bent portion 31, and the spring portion 31 has an outer peripheral cylindrical portion 32, and an outer peripheral space G1 is formed between this outer peripheral cylindrical portion 32 and the stopper portion 20. For this reason, the spring portion 30 is easily deformed to bend further at the bent portion 31 as the sleeve 2 moves toward the support side, and the outer peripheral cylindrical portion 32 is also easily deformed to bend as the sleeve 2 moves toward the support side. In this way, the spring portion 30 of the mount 1 has a low modulus of elasticity. For this reason, as the sleeve 2 moves toward the support side, it is possible to prevent large stresses from being generated at the inner peripheral cylindrical portion 33 of the spring portion 30 and at the connection point between the sleeve holding portion 40 and the spring portion 30, thereby preventing large distortions from occurring and suppressing creep at the inner peripheral cylindrical portion 33 of the spring portion 30 and at the connection point between the sleeve holding portion 40 and the spring portion 30. Furthermore, this prevents large stresses from occurring at the connection points between the spring portion 30 and the inner circumferential cylindrical portion 33 of the spring portion 30 or the sleeve holding portion 40, thereby preventing large distortions from occurring and suppressing the occurrence of cracks at the connection points between the spring portion 30 and the inner circumferential cylindrical portion 33 of the spring portion 30 or the sleeve holding portion 40.

[0059] Furthermore, as described above, the transition portion 32a of the outer peripheral cylindrical portion 32 of the spring portion 30 is located on the support side in the axial x direction compared to the stopper surface 23 of the stopper portion 20, and an outer peripheral space G1 exists between the stopper portion 20 and the spring portion 30. This makes it possible to achieve a bottom state in which the supported object 50 contacts the stopper surface 23 but does not contact the spring portion 30. Therefore, the limit of the movement of the supported object 50 toward the support side can be set without the supported object 50 coming into contact with the spring portion 30. As a result, even if the supported object 50 is subjected to a large impact, its movement can be restricted without it coming into contact with the spring portion 30, and the stress applied to the spring portion 30 can be limited. In addition, as described above, the reaction force of the stopper portion 20 is increased by the restraining ring 4, so even if the supported object 50 is subjected to a large impact, its movement can be restricted without it coming into contact with the spring portion 30.

[0060] Furthermore, as described above, as the sleeve 2 moves toward the support side, it is possible to prevent large stresses from being generated at the outer cylindrical portion 32 of the spring portion 30 and the connection portion of the stopper portion 20 with the spring portion 30, thereby preventing large distortions from occurring. As a result, deformation of the stopper portion 20 is suppressed, preventing the edge portion between the support surface 61 and the through hole 63 of the support body 60 from digging into the contact surface 21, and preventing large stresses from being generated at the contact surface 21 of the stopper portion 20 and other parts of the stopper portion 20. Therefore, it is possible to prevent cracks from forming in the stopper portion 20.

[0061] Furthermore, as described above, the spring portion 30 has a bent portion 31, and the bent portion 31 is designed to deform in a way that allows it to bend further. Also, since the spring portion 30 has an outer cylindrical portion 32 and an inner cylindrical portion 33, when the sleeve 2 moves radially, it is possible to suppress contact and wear of the spring portion 30 against the sleeve holding portion 40 and the stopper portion 20. In this way, the mount 1 can suppress contact wear.

[0062] The through-hole 63 of the support 60 has a shape that is not a perfect circle but is approximately elliptical, with major and minor axes, as shown in Figure 7, in order to facilitate the pushing in of the mounting portion 10 of the mount 1. Therefore, when a mount that has been designed to reduce the elastic modulus of the spring portion and does not have a member such as a restraining ring 4 is attached to the through-hole 63 of the support 60 as shown in Figure 7, the stopper portion of the mount may deform into an elliptical shape, conforming to the shape of the through-hole 63 of the support 60, as shown in Figure 8. For example, when attaching the mount to the support, when the supported object is operated, or when a load is input from the support due to the operation of equipment or devices such as vehicles to which the support is attached, the stopper portion of the mount may deform as shown in Figure 8. When the stopper portion deforms, the spring portion, which has a low elastic modulus, may bend. For example, the spring portion may bend so that the end in the direction of the major axis breaks, as shown in Figure 8. When the spring portion is bent, the characteristics of the spring portion deviate from the desired characteristics, and the mount may not perform the desired function. Furthermore, if the spring portion undergoes bending deformation, stress concentration may occur in the spring portion, which can reduce its durability.

[0063] In contrast, as described above, mount 1 has a restraining ring 4 attached to the stopper portion 20, thereby increasing the rigidity of the stopper portion 20. Furthermore, since the stopper portion 20 is attached to the restraining ring 4 by vulcanization bonding, this also increases the rigidity of the stopper portion 20. As a result, even when external force is applied to the mounting portion 10, the stopper portion 20, and the spring portion 30, deformation of the stopper portion 20 is suppressed, thereby preventing deformation of the spring portion 30. Therefore, even when mounted to the through hole 63 of the support 60 as shown in Figure 7, unlike mounts without the restraining ring described above, the stopper portion 20 does not deform, or is difficult to deform. Therefore, although the elastic modulus of the spring portion 30 of the mount 1 is reduced, for example, when the mount 1 is attached to the support 60, when the supported 50 is operated, or when a load is input from the support 60 based on the operation of a mechanism such as a vehicle to which the support 60 is attached, the spring portion 30 does not undergo the bending deformation shown in Figure 8, or the spring portion 30 is less likely to undergo the bending deformation shown in Figure 8.

[0064] As described above, the spring portion 30 of the mount 1 is deformed when an external force is applied to the mounting portion 10, the stopper portion 20, or the spring portion 30, due to the restraining force of the stopper portion 20 based on the action of the restraining ring 4. Therefore, the dynamic and static spring constants of the spring portion 30 of the mount 1 are prevented from deviating from the desired values, preventing the mount 1 from failing to perform its desired function. Furthermore, stress concentration in the spring portion 30 of the mount 1 is prevented from reducing the durability of the spring portion 30. In this way, the stability of the mount 1's characteristics and its durability are improved.

[0065] As described above, according to the mount 1 of the first embodiment of the present invention, even if the elastic modulus of the spring portion is lowered, a decrease in the characteristics and durability of the mount can be suppressed.

[0066] Next, a mount 6 according to a second embodiment of the present invention will be described. Figure 9 is an exploded perspective view of the mount 6 cut along the axis x, and Figure 10 is a cross-sectional view of the mount 6 along the axis x. As shown in Figures 9 and 10, the mount 6 differs from the mount 1 described above in the configuration of the restraint ring and the restraint ring housing. Hereinafter, for the mount 6, components that have the same or similar functions as those of the mount 1 will be given the same reference numerals and their descriptions will be omitted, while the different components will be described.

[0067] As shown in Figures 9 and 10, the stopper portion 20 of the mount 6 has a housing portion 27 instead of a housing portion 26 as a housing portion for the restraint ring 7. Also, unlike the restraint ring 4 of the mount 1, the restraint ring 7 of the mount 6 is detachably housed in the housing portion 27 of the stopper portion 20. The mount 6 and the housing portion 27 will be described in detail below.

[0068] As shown in Figures 9 and 10, the housing portion 27 is formed on the stopper surface 23 of the stopper portion 20 and is an annular groove that recesses from the stopper surface 23 toward the support side, forming a space corresponding to the restraint ring 7. The housing portion 27 is open toward the supported side on the stopper surface 23. The housing portion 27 is formed, for example, in cross-section to form a rectangular or substantially rectangular space, and as shown in Figure 11, it has an inner circumferential surface 27a and an outer circumferential surface 27b which are radially opposing surfaces, and a bottom surface 27c which is the bottom of the housing portion 27 and connects to the inner circumferential surface 27a and the outer circumferential surface 27b at their respective support-side ends.

[0069] The inner circumferential surface 27a is, for example, a cylindrical surface extending along axis x, specifically, for example, a cylindrical or substantially cylindrical surface with axis x as the central axis or substantially the central axis. Furthermore, the width of the inner circumferential surface 27a in the direction of axis x in the cross-section is, for example, constant or substantially constant over the circumferential extension direction of the inner circumferential surface 27a. The outer circumferential surface 27b is opposite the inner circumferential surface 27a on the outer circumferential side and is, for example, a cylindrical surface extending along axis x, specifically, for example, a cylindrical or substantially cylindrical surface with axis x as the central axis or substantially the central axis. Furthermore, the width of the outer circumferential surface 27b in the direction of axis x in the cross-section is, for example, constant or substantially constant over the circumferential extension direction of the outer circumferential surface 27b. The bottom surface 27c is, for example, an annular surface that draws a curve convex toward the support side in the cross-section. The shapes of the inner circumferential surface 27a, the outer circumferential surface 27b, and the bottom surface 27c are not limited to the shapes described above. For example, the inner circumferential surface 27a may be a conical or substantially conical cylindrical surface with axis x as its central axis or substantially central axis, such that its diameter decreases toward the supported side in the direction of axis x. The outer circumferential surface 27b may be a conical or substantially conical cylindrical surface with axis x as its central axis or substantially central axis, such that its diameter increases toward the supported side in the direction of axis x. The bottom surface 27c may be an annular surface extending along a plane perpendicular to axis x, or it may be a surface that forms a curved shape convex toward the supported side in cross-section.

[0070] Figure 12 is a perspective view of the restraint ring 7. As shown in Figure 12, the restraint ring 7 is a cylindrical member extending along axis x, for example, a cylindrical or substantially cylindrical member with axis x as its central axis or substantially its central axis. The restraint ring 7 is also, for example, a metal member. The restraint ring 7 is not limited to metal and may be made from other materials such as resin. As shown in Figure 12, the restraint ring 7 has, for example, an inner circumferential side surface 7a which faces the inner circumference, an outer circumferential side surface 7b which faces the outer circumference, a supported side surface 7c which connects to the supported ends of the inner circumferential side surface 7a and the outer circumferential side surface 7b, and a supporting side surface 7d which connects to the supported ends of the inner circumferential side surface 7a and the outer circumferential side surface 7b.

[0071] The inner circumferential surface 7a is, for example, a cylindrical surface extending along axis x, specifically, for example, a cylindrical or substantially cylindrical surface with axis x as the central axis or substantially the central axis. Furthermore, the width in the axial x direction in the cross-section of the inner circumferential surface 7a is constant or substantially constant over the circumferential extension direction of the inner circumferential surface 7a. The outer circumferential surface 7b has a similar shape to the inner circumferential surface 7b. In the restraint ring 7, the inner circumferential surface 7a and the outer circumferential surface 7b face away from each other. The outer circumferential surface 7b is, for example, a cylindrical surface extending along axis x, specifically, for example, a cylindrical or substantially cylindrical surface with axis x as the central axis or substantially the central axis. Furthermore, the width in the axial x direction in the cross-section of the outer circumferential surface 7b is constant or substantially constant over the circumferential extension direction of the outer circumferential surface 7b.

[0072] The supported side surface 7c is, for example, an annular surface extending parallel or substantially parallel to a plane perpendicular to the axis x, specifically, for example, an annular or substantially annular surface with the axis x as its center or substantially its center. Furthermore, the radial width of the supported side surface 7c in cross-section is, for example, constant or substantially constant along the circumferential extension direction of the supported side surface 7c. The supporting side surface 7d has the same shape as the supported side surface 7c, and in the restraining ring 7, the supported side surface 7c and the supporting side surface 7d face away from each other. The supporting side surface 7d is, for example, an annular surface that draws a curve convex toward the supporting side in cross-section. The radial width of the supporting side surface 7d in cross-section is, for example, constant or substantially constant along the circumferential extension direction of the supporting side surface 7d. The shapes of the inner circumferential side surface 7a, outer circumferential side surface 7b, supported side surface 7c, and supporting side surface 7d are not limited to the shapes described above. For example, the inner circumferential surface 7a may be a conical or substantially conical cylindrical surface with axis x as its central axis or substantially central axis, such that its diameter decreases toward the supported side in the direction of axis x. The outer circumferential surface 7b may be a conical or substantially conical cylindrical surface with axis x as its central axis or substantially central axis, such that its diameter increases toward the supported side in the direction of axis x. The supporting surface 7d may be an annular surface extending along a plane perpendicular to axis x, or a surface that forms a curved shape convex toward the supported side in cross-section.

[0073] As described above, the restraint ring 7 is housed within the housing portion 27 of the stopper portion 20. The shape of the housing portion 27 corresponds to the shape of the restraint ring 7. For example, within the housing portion 27, the inner circumferential side surface 27a of the housing portion 27 faces the inner circumferential side surface 7a of the restraint ring 7, the outer circumferential side surface 27b of the housing portion 27 faces the outer circumferential side surface 7b of the restraint ring 7, and the bottom surface 27c of the housing portion 27 faces the support side surface 7d of the restraint ring 7. More specifically, for example, within the housing portion 27, the inner circumferential side surface 27a of the housing portion 27 contacts the inner circumferential side surface 7a of the restraint ring 7, the outer circumferential side surface 27b of the housing portion 27 contacts the outer circumferential side surface 7b of the restraint ring 7, and the bottom surface 27c of the housing portion 27 contacts the support side surface 7d of the restraint ring 7. Furthermore, for example, in the restraining ring 7 housed within the housing section 27, the supported side surface 7c is flush with or nearly flush with the stopper surface 23 of the stopper section 20.

[0074] As described above, the cross-sectional shape of the space created by the housing portion 27 of the stopper portion 20 corresponds to the cross-sectional shape of the restraint ring 7 and is rectangular or substantially rectangular. However, the shapes of the restraint ring 7 and the housing portion 27 of the stopper portion 20 are not limited to the shapes described above. The shape of the restraint ring 7 may be other shapes. Similarly, the shape of the housing portion 27 of the stopper portion 20 may be other shapes as long as it is capable of housing the restraint ring 7 inside. Furthermore, if the restraint ring 7 can be removably housed in the housing portion 27, for example, the restraint ring 7 and the housing portion 27 may have engaging portions that can engage with each other. Specifically, for example, one or both of the inner circumferential surface 7a and outer circumferential surface 7b of the restraint ring 7 may have a radially projecting convex portion or a radially recessed portion, while one or both of the inner circumferential surface 27a and outer circumferential surface 27b of the housing portion 27 may have a radially recessed portion or a radially projecting convex portion. In this case, the convex portion can be accommodated in the concave portion, and when the convex portion is accommodated in the concave portion, the restraint ring 7 and the housing portion 27 engage with each other. Because the restraint ring 7 and the housing portion 27 can engage with each other, the restraint ring 7 housed in the housing portion 27 is less likely to come out of the housing portion 27.

[0075] As shown in Figure 12, the thickness of the restraining ring 7 is T2, and the height of the restraining ring 7 is H2. The thickness T2 is the radial dimension of the restraining ring 7, and the height H2 is the dimension in the x-axis direction of the restraining ring 7. The restraining ring 7, like the restraining ring 4, increases the reaction force of the stopper portion 20. The magnitude of the reaction force of the stopper portion 20 increased by the restraining ring 7 can be adjusted by the shape of the restraining ring 7. For example, the magnitude of the reaction force of the stopper portion 20 increased by the restraining ring 7 can be adjusted by adjusting the thickness W2 and height H2 of the restraining ring 7. For example, the heights H1 and H2 of the restraining rings 4 and 7 are the same or approximately the same, and the thickness T2 of the restraining ring 7 is smaller than the thickness T1 of the restraining ring 4. Therefore, the reaction force of the stopper portion 20 of the mount 6 is smaller than the reaction force of the stopper portion 20 of the mount 1.

[0076] In mounts having a spring portion with a low modulus of elasticity, such as mounts 1 and 6, if, for example, an excessive load is applied from the support 60 and the supported object 50 moves with a large acceleration in the direction of the support, the supported object 50 is stopped by the stopper portion 20. In other words, the supported object 50 is stopped by the reaction force of the stopper portion 20 to the load applied from the supported object 50. The reaction force produced by this stopper portion 20 is set to a desired value and can be adjusted to the desired value by adjusting the height H1 and H2 and thickness T1 and T2 of the restraining rings 4 and 7.

[0077] Mount 6 has the configuration described above and operates in the same way as Mount 1 when in use. In addition, the restraint ring 7 can be detachably housed in the housing 27 and, unlike the restraint ring 4, can be removed from the elastic body 3. Therefore, when attaching Mount 6 to the support 50, the resistance of the restraint ring 7 can be eliminated by removing it from Mount 6, making it easier to attach Mount 6 to the support 50.

[0078] As described above, according to the mount 6 of the second embodiment of the present invention, even if the elastic modulus of the spring portion is lowered, a decrease in the characteristics and durability of the mount can be suppressed.

[0079] Although embodiments of the present invention have been described above, the present invention is not limited to mounts 1 and 6 according to the above embodiments, but includes all embodiments included in the concept and claims of the present invention. Furthermore, each configuration may be selectively combined as appropriate to achieve at least some of the above-described problems and effects. For example, the shape, material, arrangement, size, etc. of each configuration in the above embodiments may be appropriately changed depending on the specific use of the present invention. [Explanation of symbols]

[0080] 1,6...Mount, 2...Sleeve, 2a...Outer surface, 2b...Tip, 2c...Rear end, 3...Elastic body part, 4,7...Restriction ring, 4a,7a...Inner circumference side, 4b,7b ...outer circumferential side, 4c,7c...supported side, 4d,7d...support side, 5...mounting groove, 10...mounting part, 11...tapered surface, 12...outer circumferential surface, 13...pinching surface, 14...groove Bottom surface, 15...Inner circumferential surface, 16...End surface, 20...Stopper part, 21...Ground surface, 22...Outer circumferential surface, 23...Stopper surface, 24...Inner inner circumferential surface, 25...Outer inner circumferential surface, 25 a...Transition surface, 26,27...Accommodation part, 26a...Supported side surface, 26b...Support side surface, 26c...Bottom surface, 27a...Inner circumference side surface, 27b...Outer circumference side surface, 27c...Bottom surface, 3 0...spring section, 31...bent section, 31a...inner surface, 31b...outer surface, 31c...tip, 32...outer circumference cylindrical section, 32a...transition section, 32b...rising section, 32c...outer circumference side, 33...inner circumference cylindrical section, 33a...transition section, 33b...rising section, 33c...inner circumference side, 40...sleeve holding section, 41...outer circumference surface, 41a...transition surface, 50...supported object, 51,52...surface, 53...through hole, 60...support, 61...support surface, 62...back surface, 63...through hole, 70...bolt, 71...nut, G1...outer circumference space, G2...inner circumference space, G3...spring section space, G4,G5...space, g1...end, H1,H2...height, L1,L2,L3...boundary line, T1,T2...height, x...axis

Claims

1. A sleeve is a cylindrical member that extends along the axis, An elastic body portion formed from an elastic body attached to the sleeve, The elastic body portion is equipped with a restraining ring, which is an annular member around the axis, The elastic body portion has a mounting portion which is an annular portion around the axis, a stopper portion which is an annular portion around the axis, a spring portion which is an annular portion around the axis, and a sleeve holding portion which is a portion that holds the sleeve. The stopper portion is located on one side in the axial direction relative to the mounting portion. The sleeve holding portion is located on the inner circumference side of the mounting portion and the stopper portion. The spring portion extends between the stopper portion and the sleeve holding portion, The mount is characterized in that the restraining ring is attached to the stopper portion.

2. The stopper portion has a housing portion which is an annular recess capable of accommodating the restraining ring, The mount according to claim 1, characterized in that the restraint ring is housed in the housing portion.

3. The mount according to claim 2, characterized in that the restraining ring is fixed to the housing portion of the stopper portion.

4. The mount according to claim 2, characterized in that the restraining ring is detachably housed in the housing portion of the stopper portion.

5. The spring portion has a bent portion which is a part that bends convexly to one side in the axial direction, The mount according to any one of claims 1 to 4, characterized in that the spring portion forms an annular space on its outer circumference between itself and the stopper portion, opening to one side in the axial direction, and also forms an annular space on its inner circumference between itself and the sleeve holding portion, opening to one side in the axial direction.

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