Multiple types of cylindrical vibration isolators with brackets and their manufacturing methods

Abstract

To provide a cylindrical vibration control device with a plurality of kinds of new brackets and its manufacturing method, capable of efficiently manufacturing each cylindrical vibration control device by achieving positioning of a center shaft of each rubber mount to each mounting hole and positioning in a circumferential direction, while adopting various brackets according to difference in vehicle types and mounting positions in manufacturing each cylindrical vibration control device.SOLUTION: In cylindrical vibration control devices 10, 90 with a plurality of kinds of brackets, brackets 12, 92 and a rubber mount main body 16 have non-rotationally symmetrical structures around a shaft, and in each of the cylindrical vibration control devices 10, 90 with the plurality of kinds of brackets, uneven positioning portions 20, 96 around the shaft to a jig 100 for press-fitting assembly disposed on the brackets 12, 92 and an engagement positioning portion 132 around the shaft to respect to the jig 100 for press-fitting assembly disposed on the rubber mount main body 16 are configured to have a relatively same positional relationship around the shaft.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a plurality of types of cylindrical vibration isolators with brackets used, for example, in engine mounts and motor mounts of automobiles, and to a method of manufacturing the same. [Background technology]

[0002] 2. Description of the Related Art Conventionally, as an anti-vibration device applied to, for example, an engine mount or a motor mount of an automobile, there has been known a cylindrical anti-vibration device with a bracket, in which, for example, a cylindrical rubber mount body is press-fitted into a mounting hole of the bracket.

[0003] Incidentally, various types of cylindrical vibration-damping devices with brackets are provided and adopted according to various conditions such as required performance, mounting state, etc. For example, different types of cylindrical vibration-damping devices with brackets are adopted for different car models, and even within a single car, different types of cylindrical vibration-damping devices with brackets are adopted as engine mounts, as shown in Utility Model Registration No. 2599196 (Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 2599196 Summary of the Invention [Problem to be solved by the invention]

[0005] In such a cylindrical vibration-damping device, when the rubber mount body is pressed into the mounting hole of the bracket, it is necessary to align the central axes of the rubber mount body and press it into the mounting hole of the bracket supported by a jig while positioning the rubber mount body circumferentially, so that the desired vibration-damping effect can be achieved against input loads from the expected direction.

[0006] However, conventionally, the shape and size of the bracket differs depending on the vehicle model and the mounting position of the cylindrical vibration isolator, and a jig was required for each cylindrical vibration isolator to support the bracket, align the central axes of the rubber mount body while positioning it circumferentially relative to the mounting hole of the bracket, and press-fit the bracket. As a result, when manufacturing multiple types of cylindrical vibration isolators with brackets, a jig corresponding to each cylindrical vibration isolator is required, which leads to complicated manufacturing processes and high costs.

[0007] The present invention was made against the background of the above circumstances, and the problem to be solved by the present invention is to provide new types of cylindrical vibration-damping devices with brackets, and a manufacturing method thereof, which can efficiently manufacture each cylindrical vibration-damping device by aligning the central axis of each rubber mount body with each mounting hole and achieving circumferential positioning, even while using different brackets depending on the vehicle model and mounting position, etc., when manufacturing each cylindrical vibration-damping device. [Means for solving the problem]

[0008] The following describes preferred embodiments for understanding the present invention, but the embodiments described below are merely illustrative and may be combined with one another as appropriate, and the multiple components described in each embodiment may be recognized and used independently as far as possible, and may also be combined with any of the components described in another embodiment as appropriate. As a result, the present invention is not limited to the embodiments described below, and various other embodiments may be realized.

[0009] The first aspect is a cylindrical vibration-damping device with bracket, in which a cylindrical rubber mount body is press-fitted into the mounting hole of each bracket, and the brackets are different from each other to form a plurality of types, wherein the brackets and the rubber mount body all have a non-rotationally symmetric structure about an axis, and in each of the plurality of types of cylindrical vibration-damping devices with bracket, the concave-convex positioning portion about the axis relative to the jig for press-fit assembly provided on the bracket and the engagement positioning portion about the axis relative to the jig for press-fit assembly provided on the rubber mount body have the same relative positional relationship about the axis.

[0010] According to this aspect, each bracket has a concave-convex positioning portion that is positioned around the axis relative to the jig for press-fit assembly, and each rubber mount body has an engagement positioning portion that is positioned around the axis relative to the jig for press-fit assembly. As a result, in any of the multiple types of bracket-attached cylindrical vibration-damping devices, each rubber mount body can be positioned in the circumferential direction relative to the mounting hole of each bracket via a common jig for press-fit assembly. In addition, since the concave-convex positioning portion and the engagement positioning portion have the same relative positional relationship around the axis, in any of the multiple types of bracket-attached cylindrical vibration-damping devices, each bracket and each rubber mount body can be properly positioned relative to each other in the circumferential direction via a common jig for press-fit assembly. Therefore, when constructing each cylindrical vibration-damping device as in the conventional structure, it is not necessary to use a separate press-fitting jig for each, and press-fitting workability and cost reduction are achieved, making it possible to efficiently manufacture multiple types of bracket-attached cylindrical vibration-damping devices.

[0011] In a second aspect, in multiple types of bracket-mounted cylindrical vibration isolation devices related to the first aspect, the concave-convex positioning portion provided on the bracket is a through hole or a pin-shaped protrusion extending in the axial direction of the mounting hole, which is the press-fit direction of the rubber mount body.

[0012] According to this aspect, the bracket has a through hole or a pin-shaped protrusion as a concave-convex positioning portion, and for example, a pin-shaped protrusion or a through hole corresponding to a jig for press-fit assembly is provided, and the bracket and the jig for press-fit assembly can be aligned with each other by inserting the pin-shaped protrusion into the through hole. In this aspect, it is possible to realize a concave-convex positioning portion that can correspond to various bracket-equipped cylindrical vibration isolators in a compact manner with excellent space efficiency, so that it is easy to set the concave-convex positioning portion in a corresponding position even between types of brackets that are different in size, shape, etc. In addition, by passing the pin-shaped protrusion provided on either the bracket or the jig through the through hole, it is possible to easily realize an effective concave-convex positioning portion even if the thickness, shape, etc. of the bracket are different.

[0013] The third aspect is such that, in multiple types of bracket-equipped cylindrical vibration isolation devices relating to the first or second aspect, the engagement positioning portion provided on the rubber mount body is a non-circular outer peripheral surface shape of an inner axial member protruding in the axial direction of the mounting hole, which is the press-fitting direction in the rubber mount body, and / or a recessed hole provided in the rubber mount body.

[0014] According to this aspect, for example, by providing a recess corresponding to the inner shaft member of the rubber mount body and / or a protrusion corresponding to the recessed hole of the rubber mount body on the jig for press-fit assembly, and by fitting the inner shaft member and the recess and / or the recessed hole and the protrusion together, it is possible to align the rubber mount body and the jig for press-fit assembly in a state in which they cannot rotate around the axis (circumferential direction). In this aspect, it is also possible to provide an engagement positioning portion while avoiding adverse effects on the spring characteristics, etc. of the rubber mount body.

[0015] A fourth aspect is a method for manufacturing a cylindrical vibration-damping device with a bracket, in which a cylindrical rubber mount body is press-fitted into the mounting hole of each bracket, and the brackets are different from each other to form a plurality of types of cylindrical vibration-damping devices with brackets, in which the brackets and the rubber mount body are both formed to have a non-rotationally symmetrical structure about an axis, while each of the brackets constituting the plurality of types of cylindrical vibration-damping devices with brackets is provided with a concave-convex positioning portion, and the concave-convex positioning portion of each bracket is positioned in the circumferential direction of the mounting hole relative to a common bracket positioning portion provided in a common jig for press-fitting assembly, and the brackets are attached to the jig for press-fitting assembly. and each of the rubber mount bodies constituting the multiple types of bracket-equipped cylindrical vibration isolation devices is provided with an engagement positioning portion, and the engagement positioning portion of each rubber mount body is positioned circumferentially of the rubber mount body relative to a common mount positioning portion provided on the shared press-fit assembly jig, the rubber mount body is set on the press-fit assembly jig, and the rubber mount body is press-fitted into the bracket with the concave-convex positioning portion of the bracket and the engagement positioning portion of the rubber mount body held in the same relative positional relationship around the axis with respect to the press-fit assembly jig.

[0016] According to this aspect, in each cylindrical vibration-damping device, the bracket and the rubber mount body are set in a state where they are properly positioned relative to each other in the circumferential direction on the same jig for press-fitting assembly, and in this state, the rubber mount body is press-fitted into the mounting hole of the bracket to manufacture each cylindrical vibration-damping device. This allows a common press-fitting assembly jig to be used when manufacturing multiple types of cylindrical vibration-damping devices with brackets, improving the press-fitting workability and reducing costs, and allowing each cylindrical vibration-damping device to be manufactured efficiently. In particular, in this aspect, even if brackets of different shapes and sizes are used, it is possible to find a common position for each bracket when they are properly set on the jig, and to set the concave-convex positioning part there, so there is no need to make basic design changes to various cylindrical vibration-damping devices with brackets.

[0017] A fifth aspect is a method for manufacturing multiple types of cylindrical vibration-damping devices with brackets according to the fourth aspect, wherein the jig for press-fitting is provided with a mount support portion that supports the rubber mount body in the press-fitting direction, and the support surface of the rubber mount body in the mount support portion is movable in the press-fitting direction together with the mount positioning portion.

[0018] According to this aspect, the support surface of the mount support part of the press-in assembly jig is movable in the direction of pressing into the mounting hole of the bracket in the rubber mount body, so that the rubber mount body can be press-fitted into the mounting hole of the bracket while maintaining the circumferential positioning of the rubber mount body relative to the press-in assembly jig.

[0019] The sixth aspect is a method for manufacturing multiple types of bracket-equipped cylindrical vibration-damping devices relating to the fourth or fifth aspect, which involves manufacturing the multiple types of bracket-equipped cylindrical vibration-damping devices described in any one of the first to third aspects.

[0020] According to this aspect, a plurality of types of bracket-attached cylindrical vibration isolators described in any one of the first to third aspects can be efficiently manufactured. Effect of the Invention

[0021] According to the present invention and the method of the present invention, in any of a plurality of types of bracket-attached cylindrical vibration isolators, the rubber mount bodies can be more efficiently press-fitted into the mounting holes of the brackets. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view showing a first bracket-attached cylindrical vibration-damping device, which is one of a plurality of types of bracket-attached cylindrical vibration-damping devices according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a bottom view of the first bracket-equipped cylindrical vibration isolation device shown in FIG. [Diagram 3] FIG. 2 is an exploded perspective view of the first bracket-equipped cylindrical vibration isolator shown in FIG. 1; [Figure 4] FIG. 4 is an enlarged longitudinal sectional view of the IV-IV section in FIG. [Diagram 5] FIG. 2 is an enlarged plan view of a rubber mount body constituting the first bracket-attached cylindrical vibration isolation device shown in FIG. [Figure 6] FIG. 1 is a perspective view showing a second bracket-attached cylindrical vibration-damping device, which is another one of the multiple types of bracket-attached cylindrical vibration-damping devices according to an embodiment of the present invention; [Figure 7] FIG. 7 is a bottom view of the second bracket-equipped cylindrical vibration isolation device shown in FIG. [Figure 8] FIG. 7 is an exploded perspective view of the second bracket-equipped cylindrical vibration isolator shown in FIG. [Figure 9] FIG. 1 is a perspective view showing a press-fitting assembly jig used when manufacturing a plurality of types of bracket-equipped cylindrical vibration isolators in the method of the present invention; [Figure 10] FIG. 10 is a perspective view showing a state in which the bracket and the rubber mount body constituting the second bracket-attached cylindrical vibration isolator shown in FIG. 6 are set on the jig for press-fitting assembly shown in FIG. [Figure 11] FIG. 11 is a plan view of a jig for press-fitting in which the bracket and the rubber mount body shown in FIG. 10 are set. [Figure 12] 12A and 12B are longitudinal sectional views of a jig for press-fitting, showing a process for press-fitting a rubber mount body into a mounting hole of a bracket, in which (a) is a cross section taken along line XII(a)-XII(a) in FIG. 11, and (b) shows the state after the rubber mount body has been press-fitted into the mounting hole of the bracket. [Figure 13] FIG. 10 is a perspective view showing a state in which the bracket and the rubber mount body constituting the first bracket-attached cylindrical vibration isolator shown in FIG. 1 are set on the jig for press-fitting assembly shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0024] 1 to 4 show a first bracket-equipped motor mount 10 for an electric vehicle as a first bracket-equipped cylindrical vibration-damping device, which is one of multiple types of bracket-equipped cylindrical vibration-damping devices according to an embodiment of the present invention. The first bracket-equipped motor mount 10 has a structure in which a cylindrical rubber mount body 16 is press-fitted into a mounting hole 14 in a first bracket 12. Note that the orientation of the first bracket-equipped motor mount 10 when mounted on a vehicle is not limited, but in the following description, the up-down direction refers to the up-down direction in FIG. 2, the front-rear direction refers to the right-left direction in FIG. 2, and the left-right direction refers to the direction perpendicular to the plane of the paper in FIG. 2, that is, the direction toward the front.

[0025] More specifically, as shown in FIG. 3, the first bracket 12 is a hard member that extends in a direction perpendicular to the left-right direction as a whole and is made of metal, fiber-reinforced synthetic resin, or the like. The first bracket 12 has a mounting hole 14 formed in a front portion thereof, and the mounting hole 14 extends in the left-right direction through the first bracket 12. The mounting hole 14 is a circular through-hole and has a certain length. That is, the peripheral wall portion 18 of the mounting hole 14 has a certain length in the axial direction (left-right direction) of the mounting hole 14, and the inner diameter of the peripheral wall portion 18 is approximately constant in the axial direction (left-right direction) of the mounting hole 14. Note that the portion of the first bracket 12 other than the mounting hole 14 is structured to be suitable for mounting to a member on the power unit side, such as a motor, and is appropriately provided with lightening holes and insertion holes through which mounting bolts are inserted. In this way, the mounting hole 14 is biased to one side (front) in the first bracket 12, and lightening holes, bolt insertion holes, etc. are provided, so that the first bracket 12 has a non-rotationally symmetric structure around the central axis L1 of the mounting hole 14.

[0026] In addition to the lightening holes and the bolt insertion holes, the first bracket 12 has a through hole 20 as a concave-convex positioning portion for positioning the first bracket 12 around the central axis L1 of the mounting hole 14 with respect to a jig 100 for press-fitting assembly described later. The through hole 20 extends in the left-right direction, which is the press-fitting direction of the rubber mount body 16 into the mounting hole 14, and has an inner diameter dimension slightly larger than the outer diameter dimension of the pin-shaped protrusion 106 of the jig 100 for press-fitting assembly described later. In the first bracket 12, the mounting hole 14 and the through hole 20 are each circular. In particular, in the first bracket 12, the central axis L2 of the through hole 20 is located rearward of the central axis L1 of the mounting hole 14 and is spaced apart by a predetermined distance A (see FIG. 2).

[0027] As shown in FIG. 5, the rubber mount body 16 has a structure in which the inner shaft member 22 and the outer cylindrical member 24 are elastically connected by a main rubber elastic body 26.

[0028] The inner shaft member 22 is made of a metal such as an aluminum alloy and has a rod shape as a whole. The inner shaft member 22 extends in the left-right direction, and both left-right end portions are fastening portions 28, 28 of a substantially rectangular block shape, and each fastening portion 28 has a bolt hole 30 penetrating in the up-down direction. Each fastening portion 28 has a shape in which one of the four corners (lower left in FIG. 2) is cut out when viewed in the axial direction (left-right direction) shown in FIG. 2, and has a non-circular outer circumferential surface shape. The fastening portions 28, 28 of the inner shaft member 22 protrude on both sides of the mounting hole 14 in the axial direction (left-right direction) when the rubber mount body 16 is press-fitted into the mounting hole 14.

[0029] Also, the left-right intermediate portion of the inner shaft member 22 has a substantially elliptical cross section, and the outer circumferential surface of the left-right intermediate portion having the substantially elliptical cross section is located more outer circumferentially than the outer circumferential surfaces of the fastening portions 28, which are both left-right end portions. That is, the outer circumferential surface of the inner shaft member 22 has an axial intermediate portion that protrudes more outer circumferentially than both axial end portions, and the axial intermediate portion having the substantially elliptical cross section protrudes more outer circumferentially than both axial end portions to form a fitting protrusion 32 that fits with an outer fitting protrusion 76, which will be described later. In particular, in this embodiment, the fitting protrusion 32 is provided with a protrusion 34 that protrudes in the axial orthogonal direction (to the right in FIG. 4) and extends over substantially the entire length in the axial direction.

[0030] Meanwhile, the fitting protrusion 32 in the axial middle portion of the inner shaft member 22 is provided with an inner recess 36 that opens to the side opposite to the side where the protrusion 34 is provided (the left side in FIG. 4). The inner recess 36 has a certain degree of opening dimension (the vertical dimension in FIG. 4) and depth dimension (the horizontal dimension in FIG. 4). In this embodiment, the inner recess 36 is formed with an opening dimension that does not reach the entire length of the fitting protrusion 32.

[0031] The outer cylindrical member 24 is made of metal or the like and has a generally cylindrical shape extending in the left-right direction. The outer cylindrical member 24 has a generally constant inner diameter dimension and allows the inner shaft member 22 to be inserted therethrough.

[0032] The fitting protrusion 32, which is the axially intermediate portion of the inner shaft member 22, is inserted into the outer cylindrical member 24, and the main rubber elastic body 26 is disposed radially between the fitting protrusion 32 of the inner shaft member 22 and the outer cylindrical member 24. As shown in Fig. 5, the main rubber elastic body 26 has a pair of rubber arms 38, 38 that connect the inner shaft member 22 and the outer cylindrical member 24 to each other. The rubber arms 38, 38 have their inner peripheral ends vulcanization bonded to the fitting protrusion 32 of the inner shaft member 22, and their outer peripheral ends vulcanization bonded to the inner peripheral surface of the outer cylindrical member 24. The main rubber elastic body 26 including the rubber arms 38, 38 covers the surface of the fitting protrusion 32 of the inner shaft member 22 at the left-right central portion, in other words, both left-right ends of the fitting protrusion 32 of the inner shaft member 22 are exposed from the main rubber elastic body 26 including the rubber arms 38, 38. In addition, the left-right ends of the fitting protrusion 32 of the inner shaft member 22 and the outer cylindrical member 24 protrude outward in the left-right direction beyond the main rubber elastic body 26.

[0033] In the radial middle portion of the main rubber elastic body 26, on the radial opposite side (left side in FIG. 4) to the side where the protrusion 34 of the fitting protrusion 32 is provided, a first recessed hole 40 is provided penetrating in the axial direction (left-right direction). The first recessed hole 40 extends a length less than halfway around in the circumferential direction. In addition, in the radial middle portion of the main rubber elastic body 26, on the side where the protrusion 34 of the fitting protrusion 32 is provided (right side in FIG. 4), a second recessed hole 42 is provided penetrating in the axial direction (left-right direction). The second recessed hole 42 extends a length less than halfway around in the circumferential direction. A pair of rubber arms 38, 38 are disposed between the circumferential ends of the first recessed hole 40 and the second recessed hole 42. In this embodiment, as described later, an engagement positioning portion 132 that positions the rubber mount body 16 about the mount central axis M with respect to the press-fit assembling jig 100 is formed as the non-circular outer peripheral surface shape of the inner shaft member 22 and the first recessed hole 40 in the main rubber elastic body 26. The mount central axis M of the rubber mount body 16 can be understood as the central axis of the outer tubular member 24.

[0034] The main rubber elastic body 26 has a first outer stopper rubber 44 that constitutes a wall portion on the opposite side to the inner shaft member 22 in the first recessed hole 40, and the first outer stopper rubber 44 is fixed to the inner circumferential surface of the outer cylindrical member 24. The first outer stopper rubber 44 has a first abutment protrusion 46 that protrudes toward the inner shaft member 22 at a circumferential center portion, and the first abutment protrusion 46 protrudes toward the opening of the inner recess 36 of the inner shaft member 22 at the circumferential center portion of the first recessed hole 40. The first abutment protrusion 46 is formed in a substantially rectangular block shape, and a first buffer protrusion 48 that further protrudes toward the inner shaft member 22 is provided at the left-right center portion of the protruding tip surface of the first abutment protrusion 46.

[0035] The main rubber elastic body 26 is provided with a second outer stopper rubber 50 which constitutes a wall portion on the opposite side to the inner shaft member 22 in the second recessed hole 42, and the second outer stopper rubber 50 is fixed to the inner circumferential surface of the outer cylindrical member 24. The second outer stopper rubber 50 is provided with a second abutment protrusion 52 which protrudes toward the inner shaft member 22 at the circumferential center portion of the second recessed hole 42, and the second abutment protrusion 52 protrudes toward the inner shaft member 22 at the circumferential center portion of the second recessed hole 42. The second abutment protrusion 52 is formed in a substantially rectangular block shape, and a second buffer protrusion 54 which protrudes further toward the inner shaft member 22 is provided at the left-right center portion of the protruding tip surface of the second abutment protrusion 52.

[0036] A first inner stopper rubber 56 is fixed to the first recessed hole 40 side (left side in FIG. 4) of the fitting protrusion 32 of the inner shaft member 22. The first inner stopper rubber 56 is arranged in a filled state within the inner recess 36, and protrudes outward beyond the opening of the inner recess 36. The first inner stopper rubber 56 and the first outer stopper rubber 44 face each other and are spaced apart in the left-right direction in FIG. 4. The first inner stopper rubber 56 is continuous with the circumferential ends of each rubber arm 38, and is provided integrally with the main rubber elastic body 26.

[0037] A second inner stopper rubber 58 is fixed to the second recessed hole 42 side (right side in FIG. 4) of the fitting projection 32 of the inner shaft member 22. The second inner stopper rubber 58 covers the surface of the protruding portion 34 of the fitting projection 32 and faces the second outer stopper rubber 50 while being spaced apart in the left-right direction in FIG. 4. The second inner stopper rubber 58 is continuous with the circumferential end of each rubber arm 38 opposite the first inner stopper rubber 56, and is provided integrally with the main rubber elastic body 26.

[0038] As described above, the inner shaft member 22 has a different shape in the circumferential direction about the mount central axis M of the rubber mount main body 16, and the shape of the main rubber elastomer 26, including the shapes of the first recessed hole 40 and the second recessed hole 42, varies in the circumferential direction about the mount central axis M, so that the rubber mount main body 16 has a non-rotationally symmetrical structure about the mount central axis M.

[0039] In such a rubber mount body 16, when an impactful large-amplitude vibration is input between the inner shaft member 22 and the outer cylindrical member 24 in the axis-perpendicular direction (left-right direction in Figure 4), the amount of relative displacement between the inner shaft member 22 and the outer cylindrical member 24 in the axis-perpendicular direction is limited by the first axis-perpendicular stopper mechanism 60 and the second axis-perpendicular stopper mechanism 62.

[0040] That is, when the inner shaft member 22 is largely displaced leftward in Fig. 4 relative to the outer cylindrical member 24, the fitting projection 32 of the inner shaft member 22 and the outer cylindrical member 24 come into contact with each other via the first outer stopper rubber 44 including the first abutment projection 46 and the first buffer projection 48, and the first inner stopper rubber 56. This constitutes a first axis-perpendicular stopper mechanism 60, which limits the amount of relative displacement in the axis-perpendicular direction between the inner shaft member 22 and the outer cylindrical member 24. Also, when the inner shaft member 22 is largely displaced rightward in Fig. 4 relative to the outer cylindrical member 24, the protrusion 34 of the fitting projection 32 of the inner shaft member 22 comes into contact with the outer cylindrical member 24 via the second outer stopper rubber 50 including the second abutment projection 52 and the second buffer projection 54, and the second inner stopper rubber 58. This forms a second axis-perpendicular stopper mechanism 62, which limits the amount of relative displacement between the inner shaft member 22 and the outer cylindrical member 24 in the axis-perpendicular direction.

[0041] The first bracket-equipped motor mount 10 has a stopper member 64 attached to the first bracket 12 and the rubber mount body 16. As shown in Fig. 3, the stopper member 64 is generally groove-shaped and has a pair of side portions 66, 66 arranged on both axial (left-right) sides of the mounting hole 14 of the first bracket 12, and an outer portion 68 arranged on the outer periphery of the first bracket 12 and connecting the pair of side portions 66, 66 to each other. It is preferable that at least the portion of the stopper member 64 that constitutes an axial stopper mechanism 86 (described later) is made of an elastic material such as rubber, but in this embodiment, the entire stopper member 64 is made of an elastic material such as rubber.

[0042] The stopper member 64 has a pair of side portions 66, 66 each having a generally rectangular shape, and a mounting hole 70 for mounting to the inner shaft member 22 of the rubber mount body 16 is provided on the side of each side portion 66 opposite to the side connected to the outer portion 68. The outer shape of the mounting hole 70 in the left-right view corresponds to the outer shape of the fitting protrusion 32 of the inner shaft member 22 in the left-right view, and has an elliptical portion 72 having a generally generally elliptical shape, and a protruding portion 74 that protrudes in a mountain shape corresponding to the protrusion 34 at a part of the outer peripheral edge of the elliptical portion 72. In the pair of side portions 66, 66, a generally annular outer fitting protrusion 76 that protrudes inward in the opposing direction continuously over substantially the entire circumference is integrally provided on the inner peripheral edge of each mounting hole 70. Note that a concave-convex portion 78 is provided between the mounting hole 70 and the outer portion 68 in the pair of side portions 66, 66. The provision of the uneven portion 78 improves the cushioning function of an axial stopper mechanism 86, which will be described later, and reduces striking noise.

[0043] A protruding portion 80 that spreads out toward the outer periphery (leftward in FIG. 4) is provided around the mounting hole 70 in the side portion 66. The protruding portion 80 has a substantially semicircular shape when viewed in the left-right direction and bulges outward in FIG. 4, and the outer periphery of the protruding portion 80 is curved in the circumferential direction and convex outward. In this embodiment, the protruding portion 80 is provided on both of the pair of side portions 66, 66, but it is also possible that the protruding portion 80 is provided on only one of the side portions 66, or that the protruding portion 80 is not provided at all.

[0044] With regard to the first bracket 12, rubber mount body 16 and stopper member 64 configured as described above, after the rubber mount body 16 is press-fitted into the mounting hole 14 of the first bracket 12, the stopper member 64 is assembled to the first bracket 12 and the rubber mount body 16 so that a pair of side portions 66, 66 of the stopper member 64 are positioned on both axial sides of the mounting hole 14 and an outer portion 68 of the stopper member 64 is positioned on the outer periphery of the first bracket 12. A detailed description of the method of press-fitting the rubber mount body 16 into the mounting hole 14 will be given later; first, a method of assembling the stopper member 64 to the first bracket 12 and the rubber mount body 16 will be described.

[0045] A pair of side portions 66, 66 of the stopper member 64 are attached from the outside in the left-right direction to the inner shaft member 22 protruding on both left-right sides of the rubber mount main body 16 assembled to the first bracket 12. That is, the fastening portions 28, 28 at both left-right ends of the inner shaft member 22 are inserted into the mounting holes 70, 70 in the pair of side portions 66, 66, and the external fitting protrusions 76 protruding inward in the opposing direction (inward in the axial direction of the inner shaft member 22) from the pair of side portions 66, 66 are externally fitted in a substantially tight contact state to the exposed portions at both left-right ends of the fitting protrusion 32 of the inner shaft member 22 that are not covered by the main rubber elastic body 26, thereby assembling the stopper member 64 to the first bracket 12 and the rubber mount main body 16. In this embodiment, since almost the entire stopper member 64 is made of an elastic material such as rubber, by spreading apart a pair of opposing side portions 66, 66 so that the opposing distance increases, it is possible to insert both left and right ends (fastening portions 28) of the inner shaft member 22 into the mounting holes 70 in the side portions 66.

[0046] In this embodiment, the fitting protrusion 32 has a generally oval shape, and the mounting hole 70 into which the fitting protrusion 32 is inserted has an oval portion 72 shaped to correspond to the fitting protrusion 32. Therefore, when the external fitting protrusion 76 is externally fitted onto the fitting protrusion 32, the stopper member 64 is positioned in the circumferential direction relative to the rubber mount body 16 by the fitting protrusion 32 and the oval portion 72, each of which is non-circular. Therefore, in this embodiment, a positioning mechanism 82 for the rubber mount body 16 and the stopper member 64 in the circumferential direction is formed by the fitting protrusion 32 and the oval portion 72 of the mounting hole 70, each of which is non-circular. In particular, in this embodiment, a protrusion 34 is provided on a portion of the outer peripheral surface of the fitting protrusion 32, and a protrusion portion 74 corresponding to the protrusion 34 is provided in the mounting hole 70. These also form a circumferential positioning mechanism 82 between the rubber mount body 16 and the stopper member 64, thereby achieving more precise circumferential positioning.

[0047] By using this positioning mechanism 82, the stopper member 64 is assembled in a circumferentially positioned state relative to the first bracket 12 and the rubber mount main body 16, so that a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 is positioned between the side portions 66, 66 opposing in the left-right direction, and the outer portion 68 of the stopper member 64 covers a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 from the outer periphery in a predetermined direction.

[0048] In the first bracket-equipped motor mount 10 configured in this manner, for example, the first bracket 12 is attached to a member on the power unit side, such as a motor (not shown), and the inner shaft member 22 is attached to a mating member 84 on the vehicle body side, indicated by a two-dot chain line in Fig. 4, by a bolt (not shown) inserted through a bolt hole 30 of the inner shaft member 22. In the first bracket-equipped motor mount 10, the mating member 84 fixed to the inner shaft member 22 extends to the left in Fig. 4 where the overhanging portion 80 widens at the side portion 66 of the stopper member 64. As a result, a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 faces the mating member 84 fixed to the inner shaft member 22 in the left-right direction, with the side portion 66 of the stopper member 64 and portions of the overhanging portion 80 sandwiched therebetween.

[0049] In the first bracket-equipped motor mount 10 constructed as described above, when an impactful large-amplitude vibration is input between the inner shaft member 22 and the outer cylindrical member 24 in the axial direction (up and down direction in Figure 4), the amount of relative axial displacement between the inner shaft member 22 and the outer cylindrical member 24 is limited by the axial stopper mechanism 86.

[0050] 4, the first bracket 12 and a mating member 84 fixed to the inner shaft member 22, which face each other in the left-right direction, come into contact with each other via the side portion 66 and the protruding portion 80 of the stopper member 64. This constitutes an axial stopper mechanism 86, which limits the amount of relative axial displacement between the inner shaft member 22 and the outer cylindrical member 24. Therefore, in the first bracket-equipped motor mount 10, the axial stopper mechanism 86 is constituted by including the side portion 66 and the protruding portion 80 of the stopper member 64.

[0051] 6 to 8 show a second bracket-equipped motor mount 90 for an electric vehicle as a second bracket-equipped cylindrical vibration-isolating device, which is another one of the multiple types of bracket-equipped cylindrical vibration-isolating devices of this embodiment. The second bracket-equipped motor mount 90 has a structure in which a cylindrical rubber mount body 16 is press-fitted into a mounting hole 94 in a second bracket 92, similar to the above-mentioned first bracket-equipped motor mount 10. In this embodiment, the shape of the second bracket 92 is different from that of the first bracket 12, while the same rubber mount body 16 is used to be press-fitted into the mounting hole 94. Therefore, the mounting hole 14 in the first bracket 12 and the mounting hole 94 in the second bracket 92 have approximately the same inner diameter dimension.

[0052] Other than the second bracket 92, the structure of the second bracket-equipped motor mount 90 is the same as that of the first bracket-equipped motor mount 10 described above, and detailed explanations of the same members and parts as those of the first bracket-equipped motor mount 10 are omitted by assigning the same reference numerals in the drawings to those in the first bracket-equipped motor mount 10. Note that the orientation of the second bracket-equipped motor mount 90 when mounted on a vehicle is not limited, but in the following explanation, the up-down direction refers to the up-down direction in Figure 7, the front-rear direction refers to the right-left direction in Figure 7, and the left-right direction refers to the direction perpendicular to the plane of the paper in Figure 7, that is, the direction toward the front.

[0053] The second bracket 92 has a shape suitable for mounting to a member on the power unit side, such as a motor, and has a mounting hole 94 formed in the front part, and has lightening holes and insertion holes through which mounting bolts are inserted, appropriately provided in parts other than the mounting hole 94. As a result, the second bracket 92 has a non-rotationally symmetrical structure about the central axis L3 of the mounting hole 94. The second bracket 92 is provided with a through hole 96 as a concave-convex positioning portion that positions the second bracket 92 about the central axis L3 of the mounting hole 94 with respect to a jig 100 for press-fitting assembly, which will be described later. In the second bracket 92, both the mounting hole 94 and the through hole 96 are circular and penetrate in the left-right direction. In the second bracket 92, the central axis L4 of the through hole 96 is also located rearward of the central axis L3 of the mounting hole 94, and is separated by a predetermined distance B (see FIG. 7). The inner diameter of the through hole 96 is approximately equal to the inner diameter of the through hole 20 in the first bracket 12, and is slightly larger than the outer diameter of a pin-shaped protrusion 106 in a jig 100 for press-fit assembly, which will be described later.

[0054] Here, the distance A between the central axis L1 of the mounting hole 14 in the first bracket 12 and the central axis L2 of the through hole 20 is set to be approximately equal to the distance B between the central axis L3 of the mounting hole 94 in the second bracket 92 and the central axis L4 of the through hole 96. In other words, although the first bracket 12 and the second bracket 92 have different overall shapes, the positional relationship of the through hole 20 to the mounting hole 14 and the positional relationship of the through hole 96 to the mounting hole 94 are the same.

[0055] In the second motor mount with bracket 90, the rubber mount body 16 is press-fitted into the mounting hole 94 in the second bracket 92, and the same stopper member 64 as in the first motor mount with bracket 10 is assembled to the second bracket 92 and the rubber mount body 16. As a result, the stopper member 64 is assembled in a state where it is positioned in the circumferential direction relative to the second bracket 92 and the rubber mount body 16 by the circumferential positioning mechanism 82, and a portion of the circumference of the peripheral wall portion 18 of the mounting hole 94 is located between the side portions 66, 66 opposing in the left-right direction, and the outer portion 68 of the stopper member 64 covers a portion of the circumference of the peripheral wall portion 18 of the mounting hole 94 from the outer periphery in a predetermined direction.

[0056] Although not shown, in the second motor mount with bracket 90 configured as described above, similarly to the first motor mount with bracket 10, for example, the second bracket 92 is attached to a member on the power unit side such as a motor, and the inner shaft member 22 is attached to a mating member on the vehicle body side by a bolt inserted through the bolt hole 30 of the inner shaft member 22. As a result, also in the second motor mount with bracket 90, when an impactful large amplitude vibration is input between the inner shaft member 22 and the outer tubular member 24 in the axial direction (left-right direction), the second bracket 92 and the mating member fixed to the inner shaft member 22, which face each other in the left-right direction, come into contact with each other via the side portion 66 and the protruding portion 80 of the stopper member 64. This forms a stopper mechanism in the axial direction similar to that of the first motor mount with bracket 10, and limits the amount of relative displacement in the axial direction between the inner shaft member 22 and the outer tubular member 24. Therefore, in the second bracket-equipped motor mount 90 as well, the side portion 66 and the protruding portion 80 of the stopper member 64 form an axial stopper mechanism.

[0057] As described above, in the first bracket-equipped motor mount 10 and the second bracket-equipped motor mount 90, in which the shapes of the brackets (first bracket 12 and second bracket 92) are different, a specific example of a method for press-fitting and assembling the rubber mount body 16 into the mounting holes 14, 94 will be described with reference to Figs. 9 to 13. In this embodiment, when press-fitting and assembling the rubber mount body into the mounting holes of the brackets in a plurality of types of bracket-equipped cylindrical vibration isolators, a common press-fit assembling jig 100 shown in Fig. 9 can be used. In the following description, the front-rear direction refers to the right-left direction in Fig. 9, and the up-down direction refers to the up-down direction in Fig. 12. The press-fit assembling jig 100 is formed of a rigid material such as metal.

[0058] As shown in FIG. 9, the press-fitting jig 100 includes a substantially rectangular base plate 102 extending in the front-rear direction at its lower end. A plurality of pedestal portions 104a, 104b protruding upward are provided at the rear end of the base plate 102 in accordance with the shape of the expected bracket (in this embodiment, the first bracket 12 and the second bracket 92). The protruding height dimension of the plurality of pedestal portions 104a, 104b is appropriately set in accordance with the shape of the expected bracket. In addition, a pin-shaped protrusion 106 protruding upward is provided at the rear portion of the base plate 102. The pin-shaped protrusion 106 is provided at an appropriate position on the base plate 102 in accordance with the shape of the expected bracket, but in this embodiment, it is provided at a position biased upward in the vertical direction in FIG. 11.

[0059] Furthermore, a cylindrical housing portion 108 is provided at the front end portion of the base plate portion 102 so as to protrude upward and house the mount support portion 112 when the rubber mount body 16 is press-fitted into the brackets (first bracket 12 and second bracket 92) described later. In this embodiment, the cylindrical housing portion 108 is a bottomed cylindrical shape having a bottom plate portion 110, and as shown in the plan view of FIG. 11, the central axis L5 of the cylindrical housing portion 108 is located forward of the central axis L6 of the pin-shaped protrusion 106 and is spaced apart by a predetermined distance C (see FIG. 11). The separation distance C between the central axis L5 of the cylindrical housing portion 108 and the central axis L6 of the pin-shaped protrusion 106 is set to be substantially equal to the separation distance A between the central axis L1 of the mounting hole 14 and the central axis L2 of the through hole 20 in the first bracket 12, and the separation distance B between the central axis L3 of the mounting hole 94 and the central axis L4 of the through hole 96 in the second bracket 92. 11. Furthermore, the central axis L5 of the cylindrical accommodating portion 108 is biased upward in the vertical direction in FIG. 11 on the base plate portion 102, and the upper portion of the cylindrical accommodating portion 108 in FIG.

[0060] The press-fitting jig 100 includes a mount support portion 112 that supports the rubber mount body 16 in the press-fitting direction (vertical direction). The mount support portion 112 is generally cylindrical with a bottom, and includes a circular bottom wall portion 114 and a peripheral wall portion 116 that protrudes upward from the outer periphery of the bottom wall portion 114. An inner shaft accommodating portion 118 that protrudes upward is provided in the center of the bottom wall portion 114, and the inner shaft accommodating portion 118 is provided with an accommodating recess 120 that is shaped to correspond to the fastening portion 28 at the axial end of the inner shaft member 22 and opens upward. That is, in this embodiment, the accommodating recess 120 is substantially rectangular in plan view, and one of the four corners is cut out. The inner shaft accommodating portion 118 is formed with a protruding height that does not reach the upper end of the peripheral wall portion 116.

[0061] Furthermore, in the mount support part 112, a positioning pin 122 that protrudes upward is provided between the inner shaft accommodating part 118 and the peripheral wall part 116 in the radial direction. In this embodiment, two positioning pins 122, 122 are provided spaced apart from each other in the circumferential direction, and when the rubber mount body 16 is supported by the mount support part 112 as described later, the two positioning pins 122, 122 are inserted into both circumferential ends of the first recessed hole 40 in the rubber mount body 16. These positioning pins 122, 122 protrude upward from the bottom plate part 110 of the cylindrical accommodating part 108, and are provided so as to penetrate the bottom wall part 114 of the mount support part 112 and protrude above the peripheral wall part 116.

[0062] The outer diameter of the mount support part 112 having such a shape is slightly smaller than the inner diameter of the cylindrical accommodating part 108, and the mount support part 112 is arranged coaxially with the cylindrical accommodating part 108, so that the mount support part 112 can be accommodated on the inner circumferential side of the cylindrical accommodating part 108. A spring 124 is provided between the bottom plate part 110 of the cylindrical accommodating part 108 and the bottom wall part 114 of the mount support part 112, and the mount support part 112 is urged upward, that is, in a direction away from the bottom plate part 110, by the urging force of the spring 124. In this embodiment, the natural length of the spring 124 is approximately equal to the vertical dimension in the internal space of the cylindrical accommodating part 108, and as shown in FIG. 9, in the initial state in which the rubber mount body 16 is not supported, approximately the entire mount support part 112 is located above the cylindrical accommodating part 108. In this embodiment, the outer diameter of the mount support portion 112 is slightly smaller than the outer diameter of the attachment holes 14, 94 in the brackets 12, 92 and the outer diameter of the rubber mount body 16 (the outer diameter of the outer tubular member 24).

[0063] Further, a clearance portion 126 is provided in the rear portion of the cylindrical accommodating portion 108, as if a portion of the peripheral wall had been cut out. The clearance portion 126 is provided over a certain circumferential length of the cylindrical accommodating portion 108, and the position of the upper end of the clearance portion 126 in the circumferential center portion is set lower than the upper end positions of other portions in the circumferential direction. As a result, when the rubber mount body 16 is press-fitted into brackets (first bracket 12 and second bracket 92) described below, air inside the cylindrical accommodating portion 108 is released through the clearance portion 126, and problems occurring during the press-fitting operation due to the action of the air spring are avoided.

[0064] A method of press-fitting the rubber mount body 16 into the brackets (first bracket 12 and second bracket 92) using the press-fit assembly jig 100 shaped as described above will be described. Fig. 10 shows how the rubber mount body 16 is press-fitted into the second bracket 92 using the press-fit assembly jig 100. That is, in Fig. 10, the second bracket 92 and the rubber mount body 16 are set in the press-fit assembly jig 100.

[0065] Here, in the second bracket 92, the central axis L3 of the mounting hole 94 and the central axis L4 of the through hole 96 are spaced from each other in the front-rear direction by a distance B, and in the jig 100 for press-fit assembly, the central axis L5 of the cylindrical accommodating portion 108 (mount support portion 112) and the central axis L6 of the pin-shaped protrusion 106 are spaced from each other in the front-rear direction by a distance C, and these distances B and C are made approximately equal to each other. As a result, when the second bracket 92 is placed on the jig 100 for press-fit assembly, the mount support portion 112 is inserted into the mounting hole 94, and the pin-shaped protrusion 106 is inserted into the through hole 96. Then, the rear end portion of the second bracket 92 is supported by the pedestal portion 104a at the rear end portion of the jig 100 for press-fit assembly, and the peripheral wall portion 18 constituting the mounting hole 94 is supported on the upper end surface of the cylindrical accommodating portion 108 located on the outer circumferential side of the mount support portion 112.

[0066] 10, two portions of the jig 100 for press-fit assembly that are spaced apart from each other in the front-rear direction are inserted into the second bracket 92, and the second bracket 92 is positioned relative to the jig 100 for press-fit assembly around the central axis L3 of the mounting hole 94. Therefore, the bracket positioning portion of the jig 100 for press-fit assembly is formed by a pin-shaped protrusion 106 that is inserted into a through hole 96 in the second bracket 92, and the second bracket 92 is set in the jig 100 for press-fit assembly in a state in which the concave-convex positioning portion (through hole 96) of the second bracket 92 is positioned relative to the mounting hole 94 in the circumferential direction (in this embodiment, a state in which the through hole 96 is located behind the mounting hole 94).

[0067] Further, the rubber mount body 16 is supported by the mount support part 112 of the jig 100 for press-fit assembly. Specifically, the positioning pins 122, 122 are inserted into the first recessed hole 40 of the rubber mount body 16, and one (lower in FIG. 12) fastening part 28 of the inner shaft member 22 is accommodated in the accommodation recess 120 of the inner shaft accommodation part 118. As a result, the outer tubular member 24 of the rubber mount body 16 is placed on the peripheral wall part 116 of the mount support part 112. That is, in this embodiment, the support surface 131 that supports the rubber mount body 16 in the mount support part 112 is formed by the upper surface of the peripheral wall part 116.

[0068] Furthermore, in this embodiment, the accommodating recess 120 has a shape corresponding to the fastening portion 28 of the inner shaft member 22. Here, the outer peripheral surface shape of the fastening portion 28 of the inner shaft member 22 and the inner peripheral surface shape of the accommodating recess 120 are each non-circular and substantially rectangular, and in particular, one of the four corners is cut out. As a result, the rubber mount body 16 is supported in a state where it is positioned in the circumferential direction relative to the mount support portion 112. In addition, the positioning pins 122, 122 protruding upward in the mount support portion 112 are inserted into the first recessed hole 40 in the rubber mount body 16, so that the rubber mount body 16 is supported in a state where it is positioned in the circumferential direction relative to the mount support portion 112.

[0069] Therefore, in this embodiment, the engagement positioning portion 132 that positions the rubber mount body 16 about the mount central axis M relative to the mount support portion 112 of the press-fit assembly jig 100 is formed by the non-circular outer circumferential surface shape of the inner shaft member 22 and the first recessed hole 40 through which the positioning pins 122, 122 are inserted. Also, the mount positioning portion 133 that positions the engagement positioning portion 132 in the circumferential direction is formed by the inner circumferential surface shape of the accommodating recess 120 and the positioning pins 122, 122.

[0070] That is, in the second bracket 92, a concave-convex positioning portion through which a pin-shaped protrusion 106 of a press-fit assembly jig 100 is inserted to position the second bracket 92 relative to the press-fit assembly jig 100 about the central axis L3 of the mounting hole 94 is constituted by the through hole 96. Also, an engagement positioning portion 132 provided in the rubber mount body 16 to position the rubber mount body 16 relative to the press-fit assembly jig 100 about the mount central axis M is constituted by the non-circular outer circumferential surface shape of the inner shaft member 22 and the first recessed hole 40. In the second bracket-equipped motor mount 90, the concave-convex positioning portion (through hole 96) and the engagement positioning portion 132 are spaced apart in the front-rear direction, and the distance of separation can be understood as a distance B between the central axis L4 of the through hole 96 and the central axis L3 of the mounting hole 94.

[0071] In this way, the second bracket 92 and the rubber mount body 16 are set in a state where they are positioned in the circumferential direction relative to the jig 100 for press-fitting. In addition, by setting the rubber mount body 16 on the mount support part 112, the central axis L3 of the mounting hole 94 and the mount central axis M of the rubber mount body 16 are aligned with each other. From this state, as shown in FIG. 12(a), the second jig 134 is pressed from above the rubber mount body 16 to press the rubber mount body 16 downward into the mounting hole 94 against the biasing force of the spring 124 to the position shown in FIG. 12(b), thereby completing the press-fitting operation. That is, with the rubber mount body 16 supported on the support surface 131, the entire mount support part 112 having the support surface 131 and the accommodating recess 120 in the mount positioning part 133 described above moves downward in FIG. 12, which is the press-fitting direction. Incidentally, by providing the second jig 134 at a position away from the pin-shaped protrusion 106 or by making the final pushing position of the second jig 134 a position higher than the pin-shaped protrusion 106, it is possible to prevent the pin-shaped protrusion 106 from interfering with the press-fitting operation by the second jig 134. During such a press-fitting operation, air inside the cylindrical accommodating portion 108 is released to the outside through the escape portion 126, thereby preventing the air inside the cylindrical accommodating portion 108 from affecting the press-fitting operation.

[0072] 13 shows an embodiment in which the rubber mount body 16 is press-fitted into the first bracket 12 using a press-fit assembly jig 100. That is, when the rubber mount body 16 is press-fitted into the first bracket 12, the first bracket 12 and the rubber mount body 16 are set in the press-fit assembly jig 100 that is also used for the second bracket 92.

[0073] Here, in the first bracket 12, the central axis L1 of the mounting hole 14 and the central axis L2 of the through hole 20 are separated from each other in the front-to-rear direction by a separation distance A, which is approximately equal to a separation distance C between the central axis L5 of the cylindrical housing portion 108 (mount support portion 112) and the central axis L6 of the pin-shaped protrusion 106 in the jig 100 for press-fit assembly. As a result, the mount support portion 112 is inserted into the mounting hole 14, and the pin-shaped protrusion 106 is inserted into the through hole 20, and the first bracket 12 is placed on the jig 100 for press-fit assembly. At this time, the rear end portion of the first bracket 12 is supported by a base portion 104b that is different from the base portion 104a that supports the second bracket 92 in the press-in assembly jig 100, and the peripheral wall portion 18 that constitutes the mounting hole 14 is supported on the upper end surface of the cylindrical accommodating portion 108 that is located on the outer periphery of the mount support portion 112.

[0074] That is, also in this embodiment, two portions of the press-fit assembling jig 100 that are spaced apart from each other in the front-rear direction are inserted into the first bracket 12, and the first bracket 12 is positioned relative to the press-fit assembling jig 100 about the central axis L1 of the mounting hole 14. In short, the first bracket 12 is set in the press-fit assembling jig 100 in a state in which the concave-convex positioning portion (through hole 20) of the first bracket 12 is positioned circumferentially relative to the mounting hole 14 (in this embodiment, a state in which the through hole 20 is located behind the mounting hole 14).

[0075] 10 to 12, when the rubber mount body 16 is press-fitted into the first bracket 12, the rubber mount body 16 is supported by the mount support part 112 of the jig 100 for press-fitting. As a result, the rubber mount body 16 is supported in a state where it is positioned in the circumferential direction relative to the mount support part 112. The circumferential positioning of the rubber mount body 16 and the mount support part 112 is achieved by the fact that the outer peripheral surface shape of the fastening part 28 of the inner shaft member 22 and the inner peripheral surface shape of the accommodating recess 120 are non-circular shapes corresponding to each other, and / or by the fact that the positioning pins 122, 122 are inserted into the first recessed hole 40 in the rubber mount body 16.

[0076] That is, in the first bracket 12, the concave-convex positioning portion that positions the first bracket 12 with respect to the jig 100 for press-fitting around the central axis L1 of the mounting hole 14 is constituted by the through hole 20. Also, the engagement positioning portion 132 in the rubber mount body 16 is the outer peripheral surface shape of the inner shaft member 22, which is non-circular, and the first recessed hole 40. In the first bracket-equipped motor mount 10, the concave-convex positioning portion (through hole 20) and the engagement positioning portion 132 are separated in the front-rear direction, and the separation distance can be understood as the separation distance A between the central axis L2 of the through hole 20 and the central axis L1 of the mounting hole 14. Therefore, in multiple types of bracket-equipped cylindrical vibration isolators (first and second bracket-equipped motor mounts 10 and 90) having different brackets (first and second brackets 12 and 92), the positional relationship between the concave-convex positioning portion and the engagement positioning portion 132 is relatively the same around the axis (the central axes L1 and L3 of the mounting holes 14 and the mount central axis M).

[0077] When the rubber mount body 16 is press-fitted into the first bracket 12, the rubber mount body 16 is positioned in the circumferential direction by the mount positioning portion 133, as in the case of the second bracket 92 described above. In this manner, the first bracket 12 and the rubber mount body 16 are set in a state in which they are positioned in the circumferential direction relative to the press-fitting assembly jig 100, so that the central axis L1 of the mounting hole 14 and the mount central axis M of the rubber mount body 16 are aligned with each other. Then, from this state, the rubber mount body 16 is press-fitted into the mounting hole 14 by the second jig 134 for the first bracket 12, as in the case of the second bracket 92 shown in FIG. 12(a), to complete the press-fitting operation. That is, when the rubber mount body 16 is pressed into the mounting holes 14, 94 in the first and second bracket-equipped motor mounts 10, 90, although the shapes of the brackets (first and second brackets 12, 92) are different, a common press-fit assembly jig 100 is used, so that the respective press-fits are achieved with the concave-convex positioning portions (through holes 20, 96) and the engagement positioning portion 132 of each bracket 12, 92 held in the same relative positional relationship around the axis (center axes L1, L3 and mount center axis M).

[0078] In the multiple types of cylindrical vibration isolators with brackets (the first motor mount with bracket 10 and the second motor mount with bracket 90) of this embodiment constructed as described above, although the brackets (the first bracket 12 and the second bracket 92) have different shapes, the concave-convex positioning portions (through holes 20, 96) of the brackets 12, 92 are positioned in the circumferential direction of the mounting holes 14, 94 relative to the bracket positioning portion (pin-shaped protrusion 106) of the common jig 100 for press-fit assembly, and the engagement positioning portion 132 of the rubber mount body 16 is positioned in the circumferential direction relative to the mount positioning portion 133 of the common jig 100 for press-fit assembly. When the brackets 12, 92 and the rubber mount body 16 are set on the jig 100 for press-fit assembly, the central axes L1, L3 of the mounting holes 14, 94 in the brackets 12, 92 and the mount central axis M of the rubber mount body 16 are aligned with each other. This allows a common press-fit assembly jig 100 to be used even when the shapes of the brackets 12, 92 are different from each other, thereby improving the efficiency of the press-fitting work and reducing costs, etc., compared to when a different press-fit assembly jig is used for each cylindrical vibration-damping device.

[0079] In this embodiment, through holes 20, 96 are provided through each bracket 12, 92 as concave-convex positioning portions for positioning each bracket 12, 92 around the central axes L1, L3 of the mounting holes 14, 94 relative to the jig 100 for press-fit assembly. Meanwhile, the jig 100 for press-fit assembly is provided with pin-shaped protrusions 106 to be inserted into each of the through holes 20, 96, and each bracket 12, 92 is set in a positioned state relative to the jig 100 for press-fit assembly by a simple operation of inserting the pin-shaped protrusions 106 into each of the through holes 20, 96. In particular, by providing the through holes 20, 96 in each bracket 12, 92, it is possible to form concave-convex positioning portions without providing a portion protruding outward from the bracket.

[0080] In this embodiment, the non-circular outer peripheral surface shape of the inner shaft member 22 and the first recessed hole 40 are provided as an engagement positioning portion 132 for positioning the rubber mount body 16 around the mount central axis M relative to the press-fit assembling jig 100. Meanwhile, the mount support portion 112 of the press-fit assembling jig 100 is provided with the accommodation recess 120 having an inner peripheral surface shape corresponding to the outer peripheral surface shape of the inner shaft member 22 and the positioning pins 122, 122 inserted into the first recessed hole 40. Therefore, by setting the rubber mount body 16 on the mount support portion 112 of the press-fit assembling jig 100 on which the brackets 12, 92 are set, the rubber mount body 16 can be positioned in the circumferential direction relative to the mount support portion 112 while aligning the central axes L1, L3 of the mounting holes 14, 94 with the mount central axis M of the rubber mount body 16.

[0081] Furthermore, when the rubber mount body 16 is set against the mount support portion 112, the support surface 131 of the rubber mount body 16 can move in the press-fitting direction together with the accommodating recess 120 in the mount positioning portion 133, so that the rubber mount body 16 can be press-fitted into the mounting holes 14, 94 of each bracket 12, 92 while maintaining its circumferentially positioned state.

[0082] Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the specific description.

[0083] In the above embodiment, in the first and second bracket-equipped motor mounts 10, 90, the respective brackets (first and second brackets 12, 92) are different, and the same rubber mount body 16 is used to be attached to each bracket 12, 92, but, for example, different rubber mount bodies may be attached to brackets of different shapes to configure multiple types of bracket-equipped cylindrical vibration-damping devices. Note that, in the present invention, the objects to which each cylindrical vibration-damping device is attached that constitute multiple types of cylindrical vibration-damping devices by combining them with each other are not limited. In other words, the object of the present invention may be, for example, multiple types of cylindrical vibration-damping devices attached to one automobile, or multiple types of cylindrical vibration-damping devices attached to multiple different automobiles.

[0084] In the above embodiment, a common stopper member 64 is used in the first and second bracket-equipped motor mounts 10, 90, but such a stopper member is not essential. Even if a stopper member is provided in the first and second bracket-equipped motor mounts 10, 90, the stopper members may have different shapes.

[0085] The shape of the rubber mount body is not limited as long as it has a non-rotationally symmetrical structure around the mount central axis M. For example, in the above embodiment, the engagement positioning portion 132 is formed by the non-circular outer peripheral surface shape of the inner shaft member 22 and the first recessed hole 40 into which the positioning pins 122, 122 of the jig 100 for press-fit assembly are inserted. However, for example, the outer peripheral surface shape of the inner shaft member may be circular, and the first recessed hole and the second recessed hole may not be provided depending on the required vibration-proofing characteristics. Furthermore, the inner shaft member may be cylindrical or polygonal tubular, and may be fixed to a mating member by a mounting bolt or the like inserted into the inner shaft member. The mating member to which the inner shaft member is fixed may be a member on the vehicle body side or a member on the power unit side such as a motor.

[0086] In the above embodiment, the first and second brackets 12, 92 are provided with the through holes 20, 96, and the jig 100 for press-fit assembly is provided with the pin-shaped protrusions 106 corresponding to the through holes 20, 96. However, the first and second brackets may be provided with pin-shaped protrusions, and the jig for press-fit assembly may be provided with through holes corresponding to the pin-shaped protrusions. Note that the recesses corresponding to the pin-shaped protrusions do not need to be through holes, and may be bottomed recesses. Furthermore, the through holes (or bottomed recesses) and the pin-shaped protrusions do not need to have circular cross sections, and may be non-circular.

[0087] In addition, the shape of the jig for press-fitting is not limited. For example, the pedestal portions 104a and 104b provided at the rear end portion of the jig 100 for press-fitting in the above embodiment are not essential, and each bracket may have a mount support portion inserted into an attachment hole, and the peripheral portion of the attachment hole may be supported on the upper end surface of the cylindrical housing portion.

[0088] In the above embodiment, a motor mount with a bracket for an electric vehicle was given as an example of a cylindrical vibration-damping device with a bracket, but the cylindrical vibration-damping device with a bracket of the present invention may also be an engine mount or differential mount with a bracket for automobiles, a cylindrical vibration-damping device with a bracket for use in non-automotive applications, etc.

[0089] In the above embodiment, two types of bracket-mounted cylindrical vibration-damping devices (first and second bracket-mounted motor mounts 10, 90) were shown as multiple types of bracket-mounted cylindrical vibration-damping devices, but there may be three or more types of bracket-mounted cylindrical vibration-damping devices, and the rubber mount body may be press-fitted into the mounting hole of the bracket using the same press-fitting assembly jig for all bracket-mounted cylindrical vibration-damping devices. [Explanation of symbols]

[0090] 10 First bracket-attached motor mount (multiple types of bracket-attached cylindrical vibration isolators, first bracket-attached cylindrical vibration isolator) 12 First Bracket 14 Mounting hole 16 Rubber mount body 18 Peripheral wall section 20 Through hole (concave / convex positioning part) 22 Inner shaft member 24 Outer cylindrical member 26 Main rubber elastic body 28 Fastening Part 30 Bolt holes 32 Fitting protrusion 34 Protrusion 36 Inner recess 38 Rubber Arm 40 First Gouging Hole 42 The second gooseberry hole 44 First outer stopper rubber 46 First abutment protrusion 48 First shock absorber protrusion 50 Second outer stopper rubber 52 Second abutment protrusion 54 Second buffer protrusion 56 First inner stopper rubber 58 Second inner stopper rubber 60 First perpendicular stop mechanism 62 Second perpendicular stop mechanism 64 Stopper member 66 Lateral part 68 Outer part 70 Mounting holes 72 Elliptical section 74 Protruding part 76 External fitting protrusion 78 Uneven part 80 Overhang part 82 (Circumferential) positioning mechanism 84 Counterpart 86 Stopper mechanism 90 Motor mount with second bracket (multiple types of cylindrical vibration isolators with brackets, cylindrical vibration isolators with second brackets) 92 Second Bracket 94 Mounting hole 96 Through hole (concave / convex positioning part) 100 Press-fit assembly jig 102 Base plate part 104a, 104b Pedestal part 106 Pin-shaped protrusion (bracket positioning part) 108 Cylindrical container 110 Bottom plate part 112 Mount support 114 Bottom wall 116 Peripheral wall section 118 Inner shaft housing 120 Recessed portion 122 Locating pin 124 Spring 126 Relief 131 Support surface 132 Engagement positioning part 133 Mount positioning part 134 Second Jig L1: Center axis of mounting hole (in first bracket) L2 (first bracket) central axis of through hole L3 (second bracket) central axis of mounting hole L4 (second bracket) center axis of through hole L5 (for press-fitting jig) central axis of cylindrical peripheral wall L6 (In a jig for press-fit assembly) Central axis of a pin-shaped protrusion M Mount center axis (on rubber mount body)

Claims

1. A cylindrical vibration isolator with brackets is provided in a plurality of types, each of which is formed by press-fitting a cylindrical rubber mount body into an attachment hole of a bracket, and the brackets are different from one another, The bracket and the rubber mount body are both rotationally asymmetrical about an axis, and In any of the multiple types of cylindrical vibration isolators with brackets, a concave-convex positioning portion for a jig for press-fitting provided on the bracket and an engagement positioning portion for a jig for press-fitting provided on the rubber mount body are in the same relative positional relationship around the axis. Multiple types of cylindrical vibration isolation devices with brackets.

2. 2. A cylindrical vibration-damping device with multiple types of brackets as described in claim 1, wherein the concave-convex positioning portion provided on the bracket is a through hole or a pin-shaped protrusion extending in the axial direction of the mounting hole, which is the press-fit direction of the rubber mount body.

3. 3. A cylindrical vibration-damping device with multiple types of brackets as described in claim 1 or 2, wherein the engagement positioning portion provided on the rubber mount body is a non-circular outer peripheral surface shape of an inner shaft member protruding in the axial direction of the mounting hole, which is the press-fitting direction in the rubber mount body, and / or a recessed hole provided in the rubber mount body.

4. A method for manufacturing a cylindrical vibration isolator with brackets, the cylindrical rubber mount body being press-fitted into the mounting hole of each bracket, the brackets being different from each other to produce a plurality of types of cylindrical vibration isolators, The bracket and the rubber mount body are both rotationally asymmetrical about an axis. Each of the brackets constituting the plurality of types of bracket-equipped cylindrical vibration-damping devices is provided with a concave-convex positioning portion, and the concave-convex positioning portion of each bracket is positioned in the circumferential direction of the mounting hole relative to a common bracket positioning portion provided on a common jig for press-fitting assembly, and the brackets are set on the jig for press-fitting assembly, Each of the rubber mount bodies constituting the plurality of types of bracket-attached cylindrical vibration isolation devices is provided with an engagement positioning portion, and the engagement positioning portion of each rubber mount body is positioned in the circumferential direction of the rubber mount body relative to a common mount positioning portion provided in the common press-fit assembly jig, and the rubber mount body is set in the press-fit assembly jig, the rubber mount body is press-fitted into the bracket while the concave-convex positioning portion of the bracket and the engagement positioning portion of the rubber mount body are held in the same relative positional relationship around the axis with respect to the press-fit assembling jig; A method for manufacturing multiple types of cylindrical vibration isolation devices with brackets.

5. A manufacturing method for multiple types of cylindrical vibration-damping devices with brackets as described in claim 4, wherein the press-fitting assembly jig is provided with a mount support portion that supports the rubber mount body in the press-fitting direction, and the support surface of the rubber mount body in the mount support portion is movable in the press-fitting direction together with the mount positioning portion.

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