Various types of cylindrical vibration isolation devices with brackets

Abstract

The present application provides a plurality of types of cylindrical anti-vibration devices with brackets, which can be used as a target for component sharing without compromising functions, while taking into account the differences in rubber bracket bodies and brackets. The plurality of types of cylindrical anti-vibration devices with brackets (10, 90, 100) are equipped with a stopper member (62) as a common member. The stopper member is formed into a groove shape, and the groove shape has a pair of side portions (64) arranged on both sides of an assembly hole (14), and an outer portion (66) connecting the pair of side portions to each other. The side portions of the stopper member are provided with a mounting hole (68) for an inner shaft member (20), and a protruding portion (76) extending toward the outer circumference is provided around the mounting hole. In some types, the side portions of the stopper member constitute an axial stopper mechanism (106), while in other types, the protruding portion of the stopper member constitutes an axial stopper mechanism (82).

Description

Technical Field

[0001] The present invention relates to various types of bracketed cylindrical vibration isolation devices used in, for example, engine mounts and motor mounts of automobiles. Background Art

[0002] Conventionally, a cylindrical anti-vibration device with a bracket is known, in which a cylindrical rubber mount body is mounted in a mounting hole of the bracket. This cylindrical anti-vibration device with a bracket is used as an anti-vibration device for, for example, an engine mount or a motor mount of a motor vehicle.

[0003] However, various types of bracketed cylindrical vibration isolators are available and used depending on various conditions, such as required performance and assembly conditions. For example, different types of bracketed cylindrical vibration isolators are used in different vehicle models. Furthermore, as shown in Japanese Patent Application Laid-Open No. 5-301526 (Patent Document 1), different types of bracketed cylindrical vibration isolators are used as engine mounts even in a single vehicle.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 5-301526 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] However, existing cylindrical anti-vibration devices with brackets are designed individually for each mounting location and vehicle type, lacking the concept of component commonality. Brackets often vary in shape and size depending on the mounting location and vehicle type, and the rubber mount bodies often also vary in shape and size depending on the required characteristics. Therefore, there is no concept of commonality in components and parts, and each component mounted therein is designed individually to suit each individual rubber mount body and bracket.

[0009] For example, in the stopper member constituting the stopper mechanism for limiting the relative displacement of the vehicle body relative to the power unit, the shape and size of the rubber mount body to which it is mounted, as well as the shape and size of the bracket with which it abuts, are also taken into consideration. Furthermore, the position, shape, and size of the portion of the stopper mechanism that serves as the abutment surface must be considered, and therefore, shapes and sizes appropriate to these are designed for each anti-vibration device.

[0010] On the other hand, in recent years, environmental issues have also led to a growing demand for simplified manufacturing and components. In response to this, the inventors have anticipated and repeatedly studied how to achieve improved environmental performance by simplifying manufacturing steps and components, even among different types of cylindrical anti-vibration devices with brackets.

[0011] The present invention was completed against the backdrop of such a situation, and the problem to be solved by the present invention is to propose a new technical concept that allows for the use of multiple types of cylindrical anti-vibration devices with brackets, without compromising functionality, while presuming that the rubber mount bodies and / or brackets are different, thereby achieving component commonality.

[0012] Means used to solve problems

[0013] The following describes preferred embodiments for understanding the present invention. However, each embodiment described below is merely illustrative and can be appropriately combined and employed with one another. Furthermore, the multiple components described in each embodiment can be independently identified and employed as much as possible, and can be appropriately combined and employed with any component described in another embodiment. Therefore, the present invention is not limited to the embodiments described below, and various other embodiments can be realized.

[0014] A first embodiment is a plurality of types of cylindrical anti-vibration devices with brackets, wherein cylindrical rubber mount bodies are respectively mounted on mounting holes of the brackets, and at least one of the brackets and the rubber mount bodies is different from each other, thereby forming a plurality of types. The same stopper member is mounted on any of the plurality of types of cylindrical anti-vibration devices with brackets as a common component, and the stopper member has a groove shape, the groove shape having a pair of side portions arranged on both sides of the mounting hole of the bracket in the axial direction, and an outer portion arranged on the outer peripheral side of the bracket and connecting the pair of side portions to each other. The stop member is provided with mounting holes for the inner shaft member of the rubber mount body on the pair of side portions, and a protruding portion extending in a circumferential direction different from that of the side portions is provided around at least one of the mounting holes. In some of the plurality of types of cylindrical anti-vibration devices with brackets, the side portions of the stop member constitute an axial stop mechanism. On the other hand, in other of the plurality of types of cylindrical anti-vibration devices with brackets, the protruding portion of the stop member constitutes an axial stop mechanism.

[0015] As previously mentioned, the stopper member originally needed to be designed to suit the rubber mount body, the shape of the bracket, and the collision surface of the stopper mechanism, taking into account the various factors. Initially, the concept of component commonality itself was not present. In this context, the present invention, while assuming the differences between the rubber mount body and the bracket in various types of cylindrical anti-vibration devices with brackets, also employs a specific design for the stopper member, which is groove-shaped and has a protruding portion on at least one of its pair of side portions. By cleverly utilizing these groove-shaped portions and the protruding portion, a stopper member can be shared across various types of cylindrical anti-vibration devices with brackets.

[0016] A second embodiment is as follows: in the plurality of types of cylindrical vibration isolation devices with brackets according to the first embodiment, in at least one of the plurality of types of cylindrical vibration isolation devices with brackets, the outer portion of the stopper member constitutes a stopper mechanism in the axis-perpendicular direction.

[0017] According to this method, the outer portion of the groove-shaped stopper member, which corresponds to the bottom portion, can be cleverly utilized to form a stopper mechanism in the perpendicular direction. Furthermore, in each cylindrical anti-vibration device, both the required axial stopper mechanism and the perpendicular stopper mechanism can be constructed using the same stopper member. Therefore, the axial stopper mechanism and the perpendicular stopper mechanism can be designed to be positioned close to each other, achieving miniaturization of the cylindrical anti-vibration device.

[0018] A third aspect is as follows: in the plurality of types of cylindrical anti-vibration devices with brackets according to the first or second aspect, the stopper member includes a positioning mechanism in the circumferential direction of the rubber mount body.

[0019] According to this aspect, the rubber mount body can be used to position the stopper member on the bracket positioned on the rubber mount body, or to prevent a large positional deviation between the stopper member and the bracket.

[0020] The fourth method is as follows: In the multiple types of cylindrical vibration isolation devices with brackets involved in any one of the first to third methods, the inner shaft member is provided with a fitting protrusion protruding toward the outer peripheral surface in the axial middle part, and the stop member is provided with an external fitting protrusion protruding toward the axial inner side and fitted onto the external side of the fitting protrusion.

[0021] According to this embodiment, the outward-engaging protrusion of the stopper member is externally engaged with the engagement protrusion of the inner shaft member, thereby also being able to retain or position the stopper member, for example, on the rubber mount body. Furthermore, these engagement protrusions and the outward-engaging protrusion can also constitute the circumferential positioning mechanism described in the third embodiment.

[0022] The fifth method is as follows: In the multiple types of cylindrical vibration isolation devices with brackets involved in any one of the first to fourth methods, the pair of side parts and the outer part in the stop member are formed with approximately constant dimensions in the groove length direction in the area connected from the outer part to the outer peripheral side of each of the side parts and formed into a groove shape.

[0023] According to this aspect, for example, the shape of the stopper member can be simplified to improve the shape stability, or it can be advantageous to avoid a decrease in aging resistance.

[0024] A sixth aspect is as follows: in the plurality of types of cylindrical anti-vibration devices with brackets according to any one of the first to fifth aspects, the protruding portion of the stopper member is formed into an outer peripheral edge shape that is curved in the circumferential direction and convex outward.

[0025] According to this aspect, the extended portion of the stopper member ensures a sufficient contact area with the bracket, and stress distribution during the stopper contact is facilitated. Furthermore, the shape stability of the molded product can be improved.

[0026] The seventh method is as follows: in the multiple types of cylindrical vibration isolation devices with brackets involved in any one of the first to sixth methods, the brackets are different from each other, and even in any one of the different brackets, in the parts of the pair of side parts of the peripheral wall part of the assembly hole where the stop member is arranged, the axial dimensions of the peripheral wall part of the assembly hole are set to be equal to each other.

[0027] According to this aspect, even in any of the mutually different brackets, the same stopper member can be mounted while ensuring the degree of freedom in setting the shape of each bracket.

[0028] The eighth method is as follows: In the multiple types of cylindrical vibration isolation devices with brackets involved in any one of the first to seventh methods, the stop member is constructed to include rubber at least in the part constituting the stop mechanism, and the rubber is intervened between the collision surface of the bracket and the object side member to which the inner shaft member is assembled and can buffer the impact of the collision.

[0029] According to this aspect, the bracket collides with the member to which the inner shaft member is attached via the rubber (cushion rubber) in the stopper member, thereby limiting the deformation amount of the rubber mount body and absorbing the impact of the collision.

[0030] Effects of the Invention

[0031] According to the present invention, a plurality of types of cylindrical vibration isolation devices with brackets can be constructed more efficiently than in the conventional structure and provided to the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a perspective view showing a first cylindrical vibration isolation device with a bracket, which is one of a plurality of types of cylindrical vibration isolation devices with brackets according to one embodiment of the present invention.

[0033] Figure 2 yes Figure 1 A bottom view of the first cylindrical anti-vibration device with a bracket is shown.

[0034] Figure 3 yes Figure 1An exploded perspective view of the first cylindrical anti-vibration device with a bracket is shown.

[0035] Figure 4 Yes Figure 2 A longitudinal cross-sectional view showing an enlarged view of section IV-IV in FIG.

[0036] Figure 5 It is the composition Figure 1 The figure is an enlarged plan view of the rubber mount main body of the first cylindrical anti-vibration device with a bracket.

[0037] Figure 6 It is the composition Figure 1 A perspective view showing an enlarged view of a stopper member of a first cylindrical anti-vibration device with a bracket.

[0038] Figure 7 yes Figure 6 Right side view of the stop member shown.

[0039] Figure 8 This is a perspective view showing a second cylindrical vibration isolating device with a bracket, which is another one of the plurality of types of cylindrical vibration isolating devices with brackets according to one embodiment of the present invention.

[0040] Figure 9 yes Figure 8 A bottom view of the second cylindrical anti-vibration device with a bracket is shown.

[0041] Figure 10 Yes Figure 9 A longitudinal cross-sectional view showing an enlarged view of the XX section in FIG.

[0042] Figure 11 This is a perspective view showing a third cylindrical vibration isolating device with a bracket, which is still another of the plurality of types of cylindrical vibration isolating devices with brackets according to one embodiment of the present invention.

[0043] Figure 12 yes Figure 11 The third cylindrical anti-vibration device with a bracket is shown in a right side view.

[0044] Figure 13 Yes Figure 12 A longitudinal cross-sectional view showing an enlarged view of the XIII-XIII section.

[0045] Description of Reference Numerals

[0046] 10: First motor bracket (multiple types of cylindrical vibration isolation devices with brackets, first cylindrical vibration isolation device with brackets);

[0047] 12: first bracket;

[0048] 14: Assembly hole;

[0049] 16: Rubber bracket body;

[0050] 18: peripheral wall part;

[0051] 20: inner shaft component;

[0052] 22: outer cylinder member;

[0053] 24: Main rubber elastic body;

[0054] 26: buckle connection part;

[0055] 28: bolt hole;

[0056] 30: Protrusion for fitting;

[0057] 32: protrusion;

[0058] 34: concave;

[0059] 36: rubber arm;

[0060] 38: first selection hole;

[0061] 40: second selective hole;

[0062] 42: first outer stop rubber;

[0063] 44: first abutting protrusion;

[0064] 46: The first slow conflict occurs;

[0065] 48: second outer stop rubber;

[0066] 50: second abutting protrusion;

[0067] 52: The second slow conflict occurs;

[0068] 54: first inner stop rubber;

[0069] 56: second inner stop rubber;

[0070] 58: First axis vertical stop mechanism;

[0071] 60: Second axis vertical stop mechanism;

[0072] 62: Stop member;

[0073] 64: lateral part;

[0074] 66: lateral part;

[0075] 68: mounting hole;

[0076] 69a: oblong part;

[0077] 69b: protrusion;

[0078] 70: external protrusion;

[0079] 72: concave and convex part;

[0080] 76: protruding part;

[0081] 78: (Circumferential) positioning mechanism;

[0082] 80: Object side member;

[0083] 82: (Axial) stop mechanism;

[0084] 90: Second motor bracket (multiple types of cylindrical vibration isolation devices with brackets, second cylindrical vibration isolation device with brackets);

[0085] 92: second bracket;

[0086] 94: Object side member;

[0087] 100: third motor bracket (multiple types of cylindrical vibration isolation devices with brackets, third cylindrical vibration isolation device with brackets);

[0088] 102: third bracket;

[0089] 103: Object side member;

[0090] 104: third axis vertical stop mechanism;

[0091] 106: (Axial) stop mechanism. DETAILED DESCRIPTION

[0092] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0093] Figures 1 to 4 The first motor bracket 10 with a bracket for an electric vehicle is shown. It is one of the multiple types of cylindrical anti-vibration devices with brackets, namely the first cylindrical anti-vibration device with brackets, which is one embodiment of the present invention. The first motor bracket 10 with a bracket is formed as follows: a cylindrical rubber bracket body 16 is mounted in the mounting hole 14 of the first bracket 12. It should be noted that the orientation of the first motor bracket 10 with a bracket when assembled in the vehicle is not limited, but in the following description, the up and down direction refers to Figure 2 The up-down direction and the front-back direction refer to Figure 2 The right and left directions in the Figure 2 The direction perpendicular to the paper is called the depth direction.

[0094] In more detail, Figure 3 As shown, the first bracket 12 is a hard component that extends in a direction orthogonal to the left and right directions as a whole and is made of metal, fiber-reinforced synthetic resin, etc. For the first bracket 12, an assembly hole 14 is formed in the front part, and the assembly hole 14 passes through the first bracket 12 and extends in the left and right directions. The assembly hole 14 is a circular through hole with a certain degree of length dimension. That is, the peripheral wall portion 18 of the assembly hole 14 has a certain degree of length dimension in the axial direction (left and right direction) of the assembly hole 14, and the inner diameter dimension of the peripheral wall portion 18 is approximately constant in the axial direction (left and right direction) of the assembly hole 14. It should be noted that in the first bracket 12, the structure formed by the portion other than the assembly hole 14 is suitable for the installation of components on the power unit side such as a motor, and is suitably designed as a weight-reducing hole or a through hole for inserting bolts for installation.

[0095] Furthermore, the rubber mount main body 16 has a structure in which the inner shaft member 20 and the outer cylinder member 22 are elastically connected by a main rubber elastic body 24 .

[0096] The inner shaft member 20 is formed of a metal such as an aluminum alloy and is formed into a rod shape as a whole. The inner shaft member 20 extends in the left and right directions, and the left and right end portions are formed into snap-fitting portions 26, 26 in the shape of approximately rectangular blocks, and each snap-fitting portion 26 is formed with a bolt hole 28 that passes through in the upward and downward directions. On the other hand, the left and right middle portion of the inner shaft member 20 is a substantially oblong cross-section, and the outer peripheral surface of the left and right middle portion of the substantially oblong cross-section is located further outward than the outer peripheral surface of the snap-fitting portions 26 as the left and right end portions. That is, the axial middle portion of the outer peripheral surface of the inner shaft member 20 protrudes further outward than the axial end portions, and the axial middle portion of the substantially oblong cross-section protrudes further outward than the axial end portions, forming a fitting protrusion 30 that fits with the later-described external fitting protrusion 70. In particular, in the present embodiment, a protrusion 30 is provided in the fitting protrusion 30 that extends in the axially perpendicular direction ( Figure 4 A protrusion 32 protrudes and extends over substantially the entire axial length.

[0097] On the other hand, the fitting protrusion 30 in the axial middle portion of the inner shaft member 20 is provided with a recess 34, which is opposite to the side where the protrusion 32 is provided ( Figure 4 The inner recess 34 has a certain opening size ( Figure 4 The vertical dimensions in the Figure 4 In the present embodiment, the recess 34 is formed with an opening size that does not reach the full length of the fitting protrusion 30.

[0098] The outer cylindrical member 22 is formed of metal or the like and has a substantially cylindrical shape extending in the left-right direction. The inner shaft member 20 can be inserted through the outer cylindrical member 22 and has a substantially constant inner diameter.

[0099] The fitting protrusion 30 as the axial middle portion of the inner shaft member 20 is inserted into the outer tube member 22, and the main rubber elastic body 24 is arranged between the fitting protrusion 30 of the inner shaft member 20 and the outer tube member 22 in the radial direction. Figure 5 As shown, the main rubber elastic body 24 includes a pair of rubber arms 36, 36 that connect the inner shaft member 20 and the outer cylindrical member 22. The inner peripheral ends of the rubber arms 36, 36 are vulcanized and bonded to the fitting protrusion 30 of the inner shaft member 20, while the outer peripheral ends are vulcanized and bonded to the inner peripheral surface of the outer cylindrical member 22. The main rubber elastic body 24, including the rubber arms 36, 36, covers the surface of the fitting protrusion 30 of the inner shaft member 20 at its center in the left-right direction. In other words, both left-right ends of the fitting protrusion 30 of the inner shaft member 20 are exposed from the main rubber elastic body 24, including the rubber arms 36, 36. Furthermore, the left-right ends of the fitting protrusion 30 of the inner shaft member 20 and the outer cylindrical member 22 protrude further outward in the left-right direction than the main rubber elastic body 24.

[0100] In the radially middle portion of the main rubber elastic body 24, on the radially opposite side to the side where the protrusion 32 of the fitting protrusion 30 is provided ( Figure 4 The first direction selection hole 38 is provided in the axial direction (left-right direction) and extends in the circumferential direction for a length less than half a circumference. In addition, in the radial middle portion of the main rubber elastic body 24, on the side where the protrusion 32 of the fitting protrusion 30 is provided ( Figure 4 A second direction-selecting hole 40 is provided, extending axially (left-right) through the first direction-selecting hole 38 (on the right side of the image). This second direction-selecting hole 40 extends for less than half the circumference. A pair of rubber arms 36, 36 are positioned between the circumferential ends of the first direction-selecting hole 38 and the second direction-selecting hole 40.

[0101] The main rubber elastic body 24 includes a first outer stopper rubber 42, which forms a wall portion of the first direction selection hole 38 on the side opposite the inner shaft member 20. This first outer stopper rubber 42 is fixed to the inner circumferential surface of the outer cylindrical member 22. The first outer stopper rubber 42 includes a first abutment protrusion 44, which projects toward the inner shaft member 20 from its circumferential center portion. The first abutment protrusion 44 projects toward the opening of the inner recess 34 of the inner shaft member 20 from the circumferential center portion of the first direction selection hole 38. The first abutment protrusion 44 is formed in a generally rectangular block shape. A first buffer protrusion 46, which further projects toward the inner shaft member 20, is provided at the left-right center portion of the protruding front end surface of the first abutment protrusion 44.

[0102] The main rubber elastic body 24 includes a second outer stopper rubber 48, which forms a wall portion of the second direction selection hole 40 on the side opposite the inner shaft member 20. This second outer stopper rubber 48 is fixed to the inner circumferential surface of the outer cylindrical member 22. The second outer stopper rubber 48 includes a second abutment protrusion 50, which projects toward the inner shaft member 20 from its circumferential center. The second abutment protrusion 50 projects toward the inner shaft member 20 from the circumferential center of the second direction selection hole 40. The second abutment protrusion 50 is formed in a generally rectangular block shape. A second buffer protrusion 52, which further projects toward the inner shaft member 20, is provided at the left-right center of the protruding front end surface of the second abutment protrusion 50.

[0103] On the side of the first direction selection hole 38 in the fitting protrusion 30 of the inner shaft member 20 ( Figure 4 The first inner stopper rubber 54 is fixed to the left side of the figure. The first inner stopper rubber 54 is arranged in a filling state in the inner recess 34 and protrudes further than the opening of the inner recess 34 to the outer peripheral side. The first inner stopper rubber 54 and the first outer stopper rubber 42 are fixed to the left side of the figure. Figure 4 The first inner stopper rubber 54 is continuous with the circumferential end portion of each rubber arm 36 and is provided integrally with the main rubber elastic body 24 .

[0104] On the second direction selection hole 40 side of the fitting protrusion 30 of the inner shaft member 20 ( Figure 4 The second inner stopper rubber 56 is fixed to the right side of the second outer stopper rubber 48. The second inner stopper rubber 56 covers the surface of the protrusion 32 in the fitting protrusion 30. Figure 4 The second inner stopper rubber 56 is continuous with the circumferential end portion of each rubber arm 36 opposite to the first inner stopper rubber 54 and is provided integrally with the main rubber elastic body 24 .

[0105] In the rubber mount body 16 having the above-described structure, when the inner shaft member 20 and the outer cylinder member 22 are spaced apart in the axially perpendicular direction ( Figure 4 When an impact-type large-amplitude vibration is input (in the left and right directions), the relative displacement of the inner shaft member 20 and the outer cylinder member 22 in the axis-perpendicular direction is limited by the first axis-perpendicular stop mechanism 58 and the second axis-perpendicular stop mechanism 60.

[0106] That is, when the inner shaft member 20 is moved relative to the outer cylinder member 22 Figure 4When the inner shaft member 20 is displaced to the left in a large manner, the fitting protrusion 30 of the inner shaft member 20 and the outer tube member 22 come into contact via the first outer stopper rubber 42 including the first contact protrusion 44 and the first buffer protrusion 46, and the first inner stopper rubber 54. Thus, the first axis vertical stopper mechanism 58 is formed to limit the relative displacement of the inner shaft member 20 and the outer tube member 22 in the axis vertical direction. In addition, when the inner shaft member 20 is displaced to the left in a large manner relative to the outer tube member 22, the fitting protrusion 30 of the inner shaft member 20 and the outer tube member 22 come into contact via the first outer stopper rubber 42 including the first contact protrusion 44 and the first buffer protrusion 46, and the first inner stopper rubber 54. Figure 4 When the inner shaft member 20 is displaced significantly to the right, the protrusion 32 of the fitting protrusion 30 of the inner shaft member 20 abuts against the outer tube member 22 via the second outer stopper rubber 48 including the second abutting protrusion 50 and the second buffer protrusion 52, and the second inner stopper rubber 56. This constitutes the second axis-perpendicular stopper mechanism 60, which limits the relative displacement of the inner shaft member 20 and the outer tube member 22 in the axis-perpendicular direction.

[0107] Then, the first bracket-mounted motor mount 10 has a stopper member 62 mounted on the first bracket 12 and the rubber mount body 16. Figure 6 As shown, the stopper member 62 is generally groove-shaped and includes a pair of side portions 64, 64 disposed on either side of the mounting hole 14 of the first bracket 12 in the axial direction (left-right direction), and an outer portion 66 disposed on the outer periphery of the first bracket 12 and connecting the pair of side portions 64, 64. The stopper member 62 is preferably formed of an elastic material such as rubber, at least in the portion constituting the axial stopper mechanisms 82, 106 and the axially perpendicular stopper mechanism (third axially perpendicular stopper mechanism 104) described later. However, in the present embodiment, the entire stopper member 62 is formed of an elastic material such as rubber.

[0108] In the stopper member 62, the pair of side portions 64, 64 and the outer portion 66 are each generally flat-plate shaped as a whole. The pair of side portions 64, 64 are spaced apart from each other in the left-right direction, and the outer portion 66 extends parallel to the left and right directions. In particular, in the groove-shaped region formed by the outer portion 66 connected to the pair of side portions 64, 64 and the outer peripheral sides of the side portions 64, 64, the groove length direction ( Figure 6 In the up-down direction), the pair of side portions 64, 64 and the outer portion 66 are respectively formed to have substantially constant dimensions.

[0109] Further, if Figure 7As shown, the pair of side portions 64, 64 of the stopper member 62 are each generally rectangular. Each side portion 64, at the end opposite the side connected to the outer portion 66, is provided with a mounting hole 68 for attaching the inner shaft member 20 of the rubber mount body 16. The outer shape of the mounting hole 68, as viewed from the left and right sides, corresponds to the outer shape of the fitting protrusion 30 of the inner shaft member 20, and includes an oblong portion 69a formed generally in an oblong shape, and a protrusion 69b corresponding to the protrusion 32 and projecting in a mountainous shape from a portion of the outer periphery of the oblong portion 69a. A generally annular outer fitting protrusion 70 is integrally formed on the inner periphery of each mounting hole 68 in each of the side portions 64, 64. The outer periphery extends substantially the entire circumference of the mounting hole 68 and protrudes inward in the opposing direction. Furthermore, a concave-convex portion 72 is provided between the mounting hole 68 and the outer portion 66 in each of the side portions 64, 64. Providing the concave-convex portion 72 improves the buffering function of the axial stopper mechanisms 82 and 106 and reduces the knocking noise.

[0110] Around the mounting hole 68 in the side portion 64, there is provided a Figure 7 The extended portion 76 extending upward in the middle is a portion different from the side portion 64. The extended portion 76 extends in a substantially semicircular shape in the left-right direction. Figure 7 The outer peripheral edge of the extension portion 76 is curved in the circumferential direction and bulges outward. It should be noted that in this embodiment, the extension portion 76 is provided on both of the pair of side portions 64 and 64, but it is sufficient to provide the extension portion 76 on at least one side portion 64.

[0111] The first bracket 12, the rubber mount body 16, and the stopper member 62 are configured as described above. The stopper member 62 is attached to the first bracket 12 and the rubber mount body 16 in the following manner: after the rubber mount body 16 is mounted in the mounting hole 14 of the first bracket 12, the pair of side portions 64, 64 of the stopper member 62 are located on both axial sides of the mounting hole 14, and the outer portion 66 of the stopper member 62 is located on the outer peripheral side of the first bracket 12.

[0112] Specifically, the rubber mount body 16 is press-fitted into the assembly hole 14 of the first bracket 12. It should be noted that there is no particular limitation on the method for press-fitting the rubber mount body 16 into the assembly hole 14. For example, a conventionally known press-fitting jig may be used for press-fitting. At this point, the first bracket 12 and the rubber mount body 16 are assembled in a predetermined orientation. In the first motor mount 10 with a bracket, the bolt holes 28 disposed at both ends of the inner shaft member 20 in the left and right directions are assembled in the vertical direction. Figure 2It should be noted that the circumferential positioning mechanism of the first bracket 12 and the rubber bracket body 16 is not limited, and for example, a conventionally known circumferential positioning mechanism may be used.

[0113] Then, the pair of side portions 64, 64 of the stopper member 62 are attached from the left-right outer side to the inner shaft member 20, which protrudes in both left-right directions from the rubber mount body 16 assembled to the first bracket 12. Specifically, the snap-fitting portions 26, 26 at both left-right end portions of the inner shaft member 20 are inserted into the mounting holes 68, 68 in the pair of side portions 64, 64. The external fitting protrusions 70 protruding inward in the opposing direction (axially inward of the inner shaft member 20) from the pair of side portions 64, 64 are fitted in a substantially close contact state onto the exposed portions of the left-right end portions of the fitting protrusion 30 of the inner shaft member 20 that are not covered by the main rubber elastic body 24. As a result, the stopper member 62 is assembled to the first bracket 12 and the rubber mount body 16. It should be noted that in this embodiment, the stop member 62 is substantially entirely made of an elastic material such as rubber, and therefore the pair of opposing side portions 64, 64 are pushed and expanded in such a manner that the opposing distance becomes larger, thereby enabling the left and right end portions of the inner shaft member 20 to be inserted into the mounting holes 68 in the side portions 64.

[0114] In this embodiment, the fitting protrusion 30 has a generally oblong shape as a whole, and the mounting hole 68 through which the fitting protrusion 30 is inserted has an oblong portion 69a formed to correspond to the shape of the fitting protrusion 30. Therefore, when the external fitting protrusion 70 is externally fitted onto the fitting protrusion 30, the non-circular fitting protrusion 30 and the oblong portion 69a respectively help to position the stopper member 62 circumferentially relative to the rubber mount body 16. Therefore, in this embodiment, the non-circular fitting protrusion 30 and the oblong portion 69a in the mounting hole 68 respectively form a positioning mechanism 78 for the circumferential positioning of the rubber mount body 16 and the stopper member 62. In particular, in this embodiment, since the protrusion 32 is provided on a portion of the outer peripheral surface of the fitting protrusion 30, and the protrusion 69b corresponding to the protrusion 32 is provided in the mounting hole 68, these also constitute the positioning mechanism 78 in the circumferential direction of the rubber mount body 16 and the stopper member 62, thereby achieving higher-level circumferential positioning.

[0115] Furthermore, in the first bracket-mounted motor mount 10, as described above, the rubber mount body 16 is assembled to the first bracket 12 in a predetermined orientation by a circumferential positioning mechanism (not shown), and the stopper member 62 is assembled to the first bracket 12 while being circumferentially positioned via the rubber mount body 16. Therefore, the positioning mechanism for circumferentially positioning the first bracket 12 and the stopper member 62 is configured as follows: it includes a positioning mechanism 78 for circumferentially positioning the rubber mount body 16 and the stopper member 62.

[0116] By means of the positioning mechanism 78, the stopper member 62 is assembled to the first bracket 12 and the rubber mount body 16 in a circumferentially positioned state. As a result, a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 is located between the side portions 64, 64 opposing each other in the left-right direction, and the outer portion 66 of the stopper member 62 covers a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 from the outer peripheral side in a predetermined direction.

[0117] The first bracketed motor bracket 10 constructed in this manner is, for example, mounted on a member on the power unit side such as a motor (not shown), and the inner shaft member 20 is mounted on the inner shaft member 20 by means of a bolt (not shown) inserted through a bolt hole 28 of the inner shaft member 20. Figure 4 The counterpart side member 80 on the vehicle body side is shown by the double-dashed line. In the first motor bracket 10 with a bracket, the counterpart side member 80 fixed to the inner shaft member 20 is extended toward the protruding portion 76 in the side portion 64 of the stopper member 62. Figure 4 Thus, a portion of the peripheral wall portion 18 of the fitting hole 14 holds the protruding portion 76 of the stopper member 62 and faces the counterpart member 80 fixed to the inner shaft member 20 in the left-right direction.

[0118] In the first motor bracket 10 having the above-described structure, when the inner shaft member 20 and the outer cylinder member 22 are axially ( Figure 4 When an impact-like large-amplitude vibration is input (in the up and down directions), the axial relative displacement of the inner shaft member 20 and the outer cylinder member 22 is limited by the axial stop mechanism 82.

[0119] That is, when the inner shaft member 20 is relative to the outer cylinder member 22 Figure 4When there is a significant vertical displacement in the first bracket 12, the first bracket 12 and the mating member 80 fixed to the inner shaft member 20, which are opposed to each other in the left-right direction, come into contact via the protruding portion 76 of the stopper member 62. This forms an axial stopper mechanism 82, which limits the relative axial displacement between the inner shaft member 20 and the outer cylindrical member 22. Therefore, the first bracket-mounted motor bracket 10 includes the protruding portion 76 of the stopper member 62, forming the axial stopper mechanism 82. Furthermore, in this embodiment, the protruding portion 76 is interposed between the collision surfaces of the first bracket 12 and the mating member 80. The stopper member 62 is entirely constructed of an elastic material such as rubber, thereby buffering the impact caused by the collision between the first bracket 12 and the mating member 80. It should be noted that the portion of the stopper member 62 that forms the axial stopper mechanism 82, which is interposed between the collision surfaces of the first bracket 12 and the mating member 80, may include not only the protruding portion 76 but also the side portion 64 located closer to the mounting hole 68 than the protruding portion 76.

[0120] Next, Figures 8-10 A second motor bracket 90 for an electric vehicle is shown, which is another cylindrical anti-vibration device with a bracket, namely, a second cylindrical anti-vibration device with a bracket, as one of the multiple types of cylindrical anti-vibration devices with brackets in this embodiment. The second motor bracket 90 is formed in the same structure as the first motor bracket 10 described above: a cylindrical rubber bracket body 16 is assembled in the assembly hole 14 in the second bracket 92. In this embodiment, the shape of the second bracket 92 is different from that of the first bracket 12, but on the other hand, the assembled rubber bracket body 16 is made of the same material. In the second motor bracket 90, the structure other than the second bracket 92 is the same as that of the first motor bracket 10 described above. For the same components and parts as those of the first motor bracket 10, detailed description is omitted in the figure by marking the same reference numerals as those in the first motor bracket 10. It should be noted that the orientation of the second motor bracket 90 when assembled in the vehicle is not limited, but in the following description, the up and down directions refer to Figure 9 The up-down direction and the front-back direction refer to Figure 9 The right and left directions in the Figure 9 The direction perpendicular to the paper is called the depth direction.

[0121] That is, in the second motor bracket 90, the rubber mount body 16 is also press-fitted into the mounting hole 14 of the second bracket 92, and the same stopper member 62 as that of the first motor bracket 10 is also assembled to the second bracket 92 and the rubber mount body 16 as a common component. As a result, the second bracket 92 and the rubber mount body 16 are assembled in a predetermined orientation, and the bolt holes 28 of the inner shaft member 20 are assembled in the vertical direction. Figure 9 Then, the stopper member 62 is assembled to the second bracket 92 and the rubber mount body 16 in a state of being positioned in the circumferential direction by the positioning mechanism 78, so that a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 is located between the side portions 64, 64 opposing each other in the left-right direction, and the outer portion 66 of the stopper member 62 covers a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 from the outer circumferential side in a predetermined direction.

[0122] The second bracketed motor bracket 90 constructed in this manner, for example, the second bracket 92 is mounted on a member on the power unit side such as a motor (not shown), and the inner shaft member 20 is mounted on the inner shaft member 20 by means of a bolt (not shown) inserted through the bolt hole 28 of the inner shaft member 20. Figure 10 In the embodiment, the object side member 94 fixed to the inner shaft member 20 extends toward the side portion 64 of the stopper member 62, where the protruding portion 76 extends. Figure 10 Thus, a portion of the peripheral wall portion 18 of the fitting hole 14 holds the protruding portion 76 of the stopper member 62 and faces the counterpart member 94 fixed to the inner shaft member 20 in the left-right direction.

[0123] In the second motor bracket 90 having the above-described structure, when the inner shaft member 20 and the outer cylinder member 22 are aligned in the axially perpendicular direction ( Figure 10 When a large-amplitude impact vibration is input (in the left and right directions), the relative displacement of the inner shaft member 20 and the outer cylinder member 22 in the direction perpendicular to the axis is also limited by the first axis perpendicular stopper mechanism 58 and the second axis perpendicular stopper mechanism 60. Figure 10 When an impact-like large-amplitude vibration is input (in the up and down directions), the axial relative displacement of the inner shaft member 20 and the outer cylinder member 22 is limited by the axial stop mechanism 82.

[0124] That is, when the inner shaft member 20 is relative to the outer cylinder member 22 Figure 10When the motor bracket 90 is displaced significantly in the vertical direction, the second bracket 92 and the mating member 94 fixed to the inner shaft member 20, which are opposed to each other in the horizontal direction, come into contact via the protruding portion 76 of the stopper member 62. This forms an axial stopper mechanism 82, which limits the relative axial displacement between the inner shaft member 20 and the outer cylinder member 22. Therefore, the second motor bracket 90 also includes the protruding portion 76 of the stopper member 62, forming the axial stopper mechanism 82. It should be noted that in the second motor bracket 90, the portion of the stopper member 62 that intervenes between the collision surface of the second bracket 92 and the mating member 94 and forms the axial stopper mechanism 82 may include not only the protruding portion 76 but also the side portion 64 located closer to the mounting hole 68 than the protruding portion 76.

[0125] Next, Figures 11-13 A third motor mount with a bracket 100 for an electric vehicle is shown. This is another of the multiple types of cylindrical vibration isolation devices with brackets in this embodiment, namely, a third cylindrical vibration isolation device with brackets. Similar to the first and second motor mounts with brackets 10 and 90, third motor mount 100 has the following structure: a cylindrical rubber mount body 16 is mounted in the mounting hole 14 of the third bracket 102. In this embodiment, the shape of the third bracket 102 differs from that of the first and second brackets 12 and 92, but the rubber mount body 16 is made of the same material. The structure of the third motor mount 100, other than the third bracket 102, is identical to that of the first motor mount 10. Components and locations identical to those of the first motor mount 10 are designated with the same reference numerals as those of the first motor mount 10, and detailed descriptions are omitted in the figures. It should be noted that the direction of the third motor bracket 100 when assembled in the vehicle is not limited. In the following description, the up and down direction refers to Figure 12 The up-down direction and the front-back direction refer to Figure 12 The right and left directions in the Figure 12 The direction perpendicular to the paper is called the depth direction.

[0126] That is, in the third bracket-mounted motor mount 100, the rubber mount body 16 is also press-fitted into the mounting hole 14 of the third bracket 102, and the same stopper member 62 as that of the first bracket-mounted motor mount 10 is also assembled to the third bracket 102 and the rubber mount body 16 as a common component. As a result, the third bracket 102 and the rubber mount body 16 are assembled in a predetermined orientation, and the bolt holes 28 of the inner shaft member 20 are assembled in the vertical direction. Figure 12Then, the stopper member 62 is assembled to the third bracket 102 and the rubber mount body 16 in a state of being positioned in the circumferential direction by the positioning mechanism 78, so that a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 is located between the side portions 64, 64 opposing each other in the left-right direction, and the outer portion 66 of the stopper member 62 covers a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 from the front and the outer peripheral side.

[0127] The third bracket-mounted motor bracket 100 constructed in this manner is, for example, mounted on a member on the power unit side such as a motor (not shown), and the inner shaft member 20 is mounted on the inner shaft member 20 by means of a bolt (not shown) inserted through the bolt hole 28 of the inner shaft member 20. Figure 12 、 13 The object side member 103 of the vehicle body side is indicated by the double-dashed line. In the third motor bracket 100 with a bracket, as shown in FIG. Figure 12 As shown, the object side member 103 fixed to the inner shaft member 20 is positioned forward of the outer portion 66 ( Figure 12 The outer portion 66 extends downward while contacting the outer portion 66. As a result, a portion of the peripheral wall portion 18 of the mounting hole 14 clamps a portion of the side portion 64 of the stopper member 62 (in the right direction). Figure 12 The portion colored in gray in the figure is opposed to the counterpart member 103 fixed to the inner shaft member 20 in the left-right direction. In addition, a portion of the peripheral wall portion 18 of the fitting hole 14 is opposed to the counterpart member 103 fixed to the inner shaft member 20 by holding the outer portion 66 of the clamping stopper member 62 in the axially perpendicular direction (front-back direction).

[0128] In the third motor bracket 100 having the above-described structure, when the inner shaft member 20 and the outer cylinder member 22 are aligned in the axially perpendicular direction ( Figure 13 When a large-amplitude impact vibration is input (in the left-right direction), the relative displacement amount in the axis-perpendicular direction between the inner shaft member 20 and the outer cylinder member 22 is also limited by the first axis-perpendicular stopper mechanism 58 and the second axis-perpendicular stopper mechanism 60. In addition, the relative displacement amount in the axis-perpendicular direction between the inner shaft member 20 and the outer cylinder member 22 in the other axis-perpendicular direction, i.e., the front-back direction ( Figure 12 When a large-amplitude impact vibration is input (in the left and right directions), the relative displacement in the vertical direction between the inner shaft member 20 and the outer cylinder member 22 is limited by the third vertical stopper mechanism 104. Figure 13 When an impact-like large-amplitude vibration is input (in the up and down directions), the axial relative displacement between the inner shaft member 20 and the outer cylinder member 22 is limited by the axial stop mechanism 106.

[0129] That is, when the inner shaft member 20 is moved relative to the outer cylinder member 22 Figure 12 When the third bracket 102 and the mating member 103 fixed to the inner shaft member 20, which are opposed to each other in the left-right direction, come into contact via the outer portion 66 of the stopper member 62. This constitutes a third vertical axis stopper mechanism 104, which limits the relative axial displacement between the inner shaft member 20 and the outer cylindrical member 22. Therefore, the third bracket-mounted motor mount 100 includes the outer portion 66 of the stopper member 62, forming a third vertical axis stopper mechanism 104 that is distinct from the first vertical axis stopper mechanism 58 and the second vertical axis stopper mechanism 60.

[0130] In addition, when the inner shaft member 20 is relative to the outer cylinder member 22 Figure 13 When the vertical displacement is large, the third bracket 102 and the counterpart member 103 fixed to the inner shaft member 20, which are opposite to each other in the left-right direction, are moved via the side portion 64 of the stopper member 62 (especially, Figure 12 The outer tube member 22 is abutted against the inner shaft member 20 and the outer tube member 22 (the portion colored in gray). This constitutes an axial stop mechanism 106 that limits the relative displacement in the axial direction between the inner shaft member 20 and the outer tube member 22. Therefore, in the third motor bracket 100, the lateral portion 64 of the stop member 62 is included to constitute the axial stop mechanism 106. It should be noted that in the third motor bracket 100, when the counterpart side member 103 fixed to the inner shaft member 20 is set to span not only the lateral portion 64 but also the protruding portion 76 in the left-right direction view, in the stop member 62, the portion that intervenes between the collision surface of the third bracket 102 and the counterpart side member 103 and constitutes the axial stop mechanism 106 includes not only the lateral portion 64 but also the protruding portion 76.

[0131] It should be noted that, as previously described, in the first motor bracket 10, the second motor bracket 90, and the third motor bracket 100, the shapes of the respective brackets (the first bracket 12, the second bracket 92, and the third bracket 102) are different, but in the peripheral wall portion 18 of the mounting hole 14, the axial direction (left-right dimension) of the portion located between the pair of side portions 64, 64 is substantially equal. Specifically, Figure 4 The axial dimension of the peripheral wall portion 18 in the first bracket 12 shown by A, Figure 10 The axial dimension of the peripheral wall portion 18 in the second bracket 92 shown by B, and Figure 13 The axial dimensions of the peripheral wall portions 18 in the third bracket 102 indicated by C are substantially equal.

[0132] According to the first, second, and third motor mounts 10, 90, and 100, which are various types of bracketed cylindrical vibration isolation devices according to this embodiment, although the brackets (first, second, and third brackets 12, 92, 102) are different, they utilize a common stopper member 62 as a component. This stopper member 62 constitutes the axial stopper mechanisms 82, 106 of each motor mount 10, 90, and 100. Specifically, the stopper member 62 is groove-shaped and can be clamped and mounted to each bracket 12, 92, and 102 so that its pair of side portions 64, 64 are located axially on opposite sides of the mounting hole 14. Therefore, the common stopper member 62 can be stably mounted regardless of the bracket shape. Furthermore, in this embodiment, in the first and second motor mounts 10 and 90, the extended portion 76 of the stopper member 62 can constitute the axial stopper mechanism 82, and in the third motor mount 100, the side portion 64 of the stopper member 62 can constitute the axial stopper mechanism 106. Thus, the side portion 64 and the extended portion 76 of the stopper member 62 can be cleverly utilized to constitute the axial stopper mechanism required for each cylindrical vibration isolation device (e.g., a motor mount).

[0133] Furthermore, in the third motor mount with a bracket 100, the outer portion 66 of the stopper member 62 is used to provide one of the vertical axis stopper mechanisms, namely a third vertical axis stopper mechanism 104. This allows the same stopper member 62 to constitute both the axial stopper mechanisms 82 and 106 and the vertical axis stopper mechanism (third vertical axis stopper mechanism 104), making it applicable to a variety of motor mounts with a bracket. In particular, the ability to utilize the same stopper member 62 to constitute both the axial stopper mechanisms 82 and 106 and the vertical axis stopper mechanism (third vertical axis stopper mechanism 104) allows for miniaturization of a cylindrical vibration isolation device with a bracket (e.g., a motor mount with a bracket).

[0134] The stopper member 62 and the rubber mount body 16 have a circumferential positioning mechanism 78. Each bracket 12, 92, 102 and the rubber mount body 16 are circumferentially positioned by a conventionally known positioning mechanism. This allows the outer portion 66 and the extended portion 76 to be positioned at a predetermined position on the side portion 64 of the stopper member 62 relative to each bracket 12, 92, 102.

[0135] The inner shaft member 20 includes a fitting protrusion 30 protruding toward the outer circumference from its axially intermediate portion, and the stopper member 62 includes an externally fitting protrusion 70 that fits externally onto the fitting protrusion 30. Specifically, when the stopper member 62 is assembled to the rubber mount body 16, the externally fitting protrusion 70 fits externally onto the fitting protrusion 30, thereby securing the stopper member 62 to the rubber mount body 16. In particular, the fitting protrusion 30 and the externally fitting protrusion 70 (as well as the oblong portion 69a of the mounting hole 68 at their peripheral edges) are each formed in an oblong shape, and the fitting protrusion 30 and the mounting hole 68 include corresponding protrusions 32 and protrusions 69b. This, in turn, forms a positioning mechanism 78 for the circumferential direction of the stopper member 62 and the rubber mount body 16.

[0136] In the groove-shaped portion of the stopper member 62 formed by the pair of side portions 64, 64 and the outer portion 66, the axial (left-right) dimensions of these side portions 64, 64 and the outer portion 66 are substantially constant. This results in a relatively simple shape for the stopper member 62, which also contributes to improved shape stability and prevents degradation of aging resistance. In this embodiment, the pair of side portions 64, 64 and the outer portion 66 each have a certain axial dimension. Therefore, these side portions 64, 64 and the outer portion 66 can easily provide an axial stopper mechanism and a stopper mechanism perpendicular to the axis.

[0137] The side portion 64 of the stopper member 62 is provided with an extension 76. The outer peripheral edge of the extension 76 is shaped to be curved in the circumferential direction and convex outward. This ensures that the contact area between the extension 76, the bracket (in this embodiment, the first bracket 12 or the second bracket 92), and the mating member 80, 94 is maintained within the stopper mechanism 82 provided axially with the extension 76. This helps disperse stress when the bracket and the mating member 80, 94 collide via the extension 76. Furthermore, the shape stability of the molded part in the stopper member 62 is improved.

[0138] In each bracket (first bracket 12, second bracket 92, and third bracket 102), the axial dimensions (A, B, and C, respectively) of the portion of the stopper member 62 within the peripheral wall portion 18 of the transfer mounting hole 14 are substantially equal. This allows the same stopper member 62 to be mounted regardless of the overall shape of each bracket 12, 92, or 102, thereby increasing the degree of freedom in bracket shape design.

[0139] In this embodiment, the entire stopper member 62 is made of an elastic material such as rubber. The side portions 64, outer portions 66, and extended portions 76 of the stopper member 62, which constitute the stopper mechanism in the axial and perpendicular directions, are also made of an elastic material. This cushions the impact of collisions between the brackets 12, 92, and 102 and the mating members 80, 94, and 103 via the side portions 64, outer portions 66, and extended portions 76, functioning as rubber cushions.

[0140] As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to this specific description.

[0141] In the above embodiment, the first, second, and third motor mounts 10, 90, 100 are configured with different brackets (first bracket 12, second bracket 92, and third bracket 102). The rubber mount bodies 16 attached to the brackets 12, 92, and 102 are made of the same material. For example, by attaching different rubber mount bodies to brackets of the same shape, multiple types of cylindrical anti-vibration devices with brackets can be configured. Alternatively, by attaching different rubber mount bodies to brackets of different shapes, multiple types of cylindrical anti-vibration devices with brackets can be configured. In the present invention, the same stopper member can be attached to multiple types of cylindrical anti-vibration devices with brackets configured in this manner as a common component.

[0142] In the embodiment, the Figure 7 When the stopper member 62 is positioned in the direction indicated by the outer edge of the inner shaft, the extension portion 76 extends upward. However, the direction in which the extension portion bulges out from the lateral portion is not limited. Specifically, in some cylindrical anti-vibration devices, the extension portion serves as a stopper mechanism, and the extension portion can be provided in the direction of extension of the mating member to be mounted on the inner shaft member. The extension direction of the extension portion can be appropriately set to suit the intended mating member, etc. Furthermore, the extension portion can extend in multiple directions, not just in one direction, around the mounting hole.

[0143] The shape of the rubber bracket body is not limited. For example, the shape of the main rubber elastic body can be appropriately set according to the required vibration-proof characteristics, and an outer cylindrical member is not necessary. For example, the outer peripheral surface of the main rubber elastic body can be fixed directly to the inner peripheral surface of the assembly hole in the bracket. That is, the assembly method for the assembly hole in the bracket of the rubber bracket body is not limited to press-fitting. In addition, the shape of the inner shaft member is not limited, and it can be, for example, a cylindrical shape, a polygonal column shape, etc. Furthermore, the inner shaft member can also be a cylindrical shape, a polygonal cylindrical shape, and can also be fixed to the counterpart side member by means of mounting bolts inserted through the inner shaft member. It should be noted that the counterpart side member to which the inner shaft member is fixed can be a member on the vehicle body side or a member on the power unit side such as a motor.

[0144] A positioning mechanism for circumferentially positioning the stopper member and the rubber mount body is not essential. Even if a circumferential positioning mechanism is provided, it is not limited to that exemplified in the above embodiment, and a conventionally known circumferential positioning mechanism can be employed.

[0145] In the above embodiment, the entire stopper member 62 is formed of an elastic material such as rubber. However, preferably, the portion of the stopper member that intervenes between the bracket and the counterpart member that collide with each other is formed of an elastic material such as rubber, and the other portions may be made of a hard member.

[0146] In the embodiment, a motor mount with a bracket for an electric vehicle is exemplified as a cylindrical vibration isolation device with a bracket, but the cylindrical vibration isolation device with a bracket involved in the present invention may also be an engine mount with a bracket for a motor vehicle, a differential mount, a cylindrical vibration isolation device with a bracket other than for a motor vehicle, etc.

[0147] In the above embodiment, three types of cylindrical vibration isolation devices with brackets (a first motor bracket 10, a second motor bracket 90, and a third motor bracket 100) are shown as multiple types of cylindrical vibration isolation devices with brackets. However, the number of cylindrical vibration isolation devices with brackets may be two, four, or more. Furthermore, in some types, the lateral portion of the stopper member constitutes an axial stop mechanism, while in other types, the protruding portion of the stopper member constitutes an axial stop mechanism. However, each cylindrical vibration isolation device may include at least one of these types.

Claims

1. A plurality of types of cylindrical anti-vibration devices (10, 90, 100) with brackets, wherein cylindrical rubber bracket bodies (16) are respectively mounted in mounting holes (14) of brackets (12, 92, 102), and at least one of the brackets (12, 92, 102) and the rubber bracket bodies (16) is different from each other, thereby forming the plurality of types of cylindrical anti-vibration devices (10, 90, 100) with brackets, wherein: The same stopper member (62) is mounted on any one of the plurality of types of cylindrical anti-vibration devices (10, 90, 100) with brackets as a common component. The stopper member (62) is formed into a groove shape having a pair of side portions (64) arranged on both axial sides of the mounting hole (14) of the bracket (12, 92, 102), and an outer portion (66) arranged on the outer peripheral side of the bracket (12, 92, 102) and connecting the pair of side portions (64) to each other, and The pair of side portions (64) of the stopper member (62) are provided with mounting holes (68) for the inner shaft member (20) of the rubber bracket body (16), and a protruding portion (76) is integrally provided around at least one of the mounting holes (68), extending in a circumferential direction different from that of the side portion (64) and protruding outward in the circumferential direction from the circumferential end edge of the side portion (64). In some of the plurality of types of cylindrical anti-vibration devices (10, 90, 100) with brackets, the side portion (64) of the stopper member (62) constitutes a first axial stopper mechanism (106), and on the other hand, In some other types of the plurality of types of cylindrical anti-vibration devices with brackets (10, 90, 100), the protruding portion (76) of the stop member (62) constitutes a second axial stop mechanism (82).

2. The multiple types of cylindrical vibration isolation devices (10, 90, 100) with brackets according to claim 1, wherein: In at least one of the plurality of types of cylindrical anti-vibration devices (10, 90, 100) with brackets, the outer portion (66) of the stopper member (62) constitutes a third stopper mechanism (104) in the axis-vertical direction.

3. The multiple types of cylindrical vibration isolation devices (10, 90, 100) with brackets according to claim 1 or 2, wherein: The stopper member (62) includes a positioning mechanism (78) for the circumferential direction of the rubber bracket body (16).

4. The multiple types of cylindrical vibration isolation devices (10, 90, 100) with brackets according to claim 1 or 2, wherein: The inner shaft member (20) is provided with a fitting protrusion (30) protruding toward the outer peripheral surface in the axial middle portion, and the stop member (62) is provided with an outer fitting protrusion (70) protruding toward the axial inner side and fitting outside the fitting protrusion (30).

5. The multiple types of cylindrical vibration isolation devices (10, 90, 100) with brackets according to claim 1 or 2, wherein: The pair of side portions (64) and the outer portion (66) in the stopper member (62) are formed to have a constant size in the groove length direction in a region formed in a groove shape from the outer portion (66) to the outer peripheral side of each side portion (64).

6. The multiple types of cylindrical vibration isolation devices (10, 90, 100) with brackets according to claim 1 or 2, wherein: The protruding portion (76) of the stopper member (62) is formed into an outer peripheral shape that is curved in the circumferential direction and convex toward the outside.

7. The multiple types of cylindrical vibration isolation devices (10, 90, 100) with brackets according to claim 1 or 2, wherein: In the plurality of types of cylindrical vibration isolation devices (10, 90, 100) with brackets, the brackets (12, 92, 102) are different from each other, and In any one of the different brackets (12, 92, 102), in the portion of the peripheral wall portion of the assembly hole (14) where the pair of side portions (64) of the stop member (62) are arranged, the axial dimensions of the peripheral wall portion of the assembly hole (14) are set to be equal to each other.

8. The multiple types of cylindrical vibration isolation devices (10, 90, 100) with brackets according to claim 2, wherein: The stop member (62) is constructed to include rubber in at least the parts constituting the first stop mechanism (106), the second stop mechanism (82), and the third stop mechanism (104), and the rubber is interposed between the collision surface of the bracket (12, 92, 102) and the object side member (80, 94, 103) assembled with the inner shaft member (20) to buffer the impact of the collision.

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