JP7680918B2 - Multiple types of cylindrical vibration isolators with brackets and their manufacturing methods - Google Patents

Description

The present invention relates to multiple types of cylindrical vibration isolation devices with brackets that are used, for example, in engine mounts and motor mounts in automobiles, and to a method for manufacturing the same.

Conventionally, cylindrical vibration isolation devices with brackets have been known as vibration isolation devices that are applied to, for example, engine mounts and motor mounts of automobiles, and are assembled by press-fitting a cylindrical rubber mount body into a mounting hole in the bracket.

A wide variety of bracket-equipped cylindrical vibration-damping devices are available for use depending on various conditions, such as required performance and mounting conditions. For example, different types of bracket-equipped cylindrical vibration-damping devices are used in different car models, and even within a single car, different types of bracket-equipped cylindrical vibration-damping devices are used as engine mounts, as shown in Utility Model Registration No. 2599196 (Patent Document 1).

Utility Model Registration No. 2599196

When press-fitting the rubber mount body into the mounting hole of the bracket in such a cylindrical vibration isolation device, it was necessary to press-fit the rubber mount body by aligning their respective central axes while positioning it circumferentially relative to the mounting hole of the bracket supported by a jig so that the desired vibration isolation effect would be achieved against input loads from the expected direction.

However, in the past, the shape and size of the bracket varied depending on the vehicle model and the mounting position of the cylindrical vibration isolation device, and a jig was needed for each cylindrical vibration isolation device to support the bracket, align the central axis of each while positioning the rubber mount body circumferentially relative to the mounting hole of the bracket, and press-fit them. As a result, when manufacturing multiple types of cylindrical vibration isolation devices with brackets, a jig corresponding to each cylindrical vibration isolation device was needed, leading to complicated manufacturing processes and high costs.

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 a novel cylindrical vibration-damping device with multiple types of brackets and a manufacturing method thereof that can efficiently manufacture each cylindrical vibration-damping device by achieving alignment of the central axis of each rubber mount body with each mounting hole and positioning in the circumferential direction while using different brackets depending on the vehicle model and mounting position when manufacturing each cylindrical vibration-damping device.

The following describes preferred embodiments for understanding the present invention. However, each embodiment described below is merely an example, and may be combined with one another as appropriate. 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 alternative embodiments may be realized.

The first aspect is a cylindrical vibration-isolating device with brackets, in which a cylindrical rubber mount body is press-fitted into the mounting hole of each bracket, and the brackets are different from one another to form a plurality of types of cylindrical vibration-isolating devices with brackets, and the brackets and the rubber mount bodies are all non-rotationally symmetrical about an axis, and in each of the plurality of types of cylindrical vibration-isolating devices with brackets, the concave-convex positioning portion about the axis relative to the jig for press-fitting assembly provided on the bracket and the engagement positioning portion about the axis relative to the jig for press-fitting assembly provided on the rubber mount body are in the same relative positional relationship about the axis.

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 cylindrical vibration-damping devices with brackets, 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 cylindrical vibration-damping devices with brackets, each bracket and each rubber mount body can be properly aligned in the circumferential direction relative to each other via a common jig for press-fit assembly. Therefore, when constructing each cylindrical vibration-damping device as in the conventional structure, there is no need 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 cylindrical vibration-damping devices with brackets.

The second aspect is a cylindrical vibration isolation device with bracket of multiple types according to the first aspect, in which 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.

According to this aspect, the bracket has a through hole or a pin-shaped protrusion as a concave-convex positioning portion, and by providing a pin-shaped protrusion or through hole corresponding to a jig for press-fit assembly, for example, and inserting the pin-shaped protrusion into the through hole, the bracket and the jig for press-fit assembly can be aligned with each other. In this aspect, it is possible to realize a concave-convex positioning portion that can correspond to various bracket-equipped cylindrical vibration isolation devices 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 differ 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 differs.

The third aspect is a multiple type of bracket-attached cylindrical vibration isolation device according to the first or second aspect, in which 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.

According to this aspect, for example, a jig for press-fit assembly can be provided with 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, and the inner shaft member and the recess and/or the recessed hole and the protrusion can be fitted together 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.

The fourth aspect is a method for manufacturing a cylindrical vibration-damping device with brackets, 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. The brackets and the rubber mount body are both non-rotationally symmetrical 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. Each of the rubber mount bodies constituting the multiple 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 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 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 relative to the press-fit assembly jig.

According to this aspect, for 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 press-fit assembly jig, 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-fit assembly jig to be used when manufacturing multiple types of cylindrical vibration-damping devices with brackets, improving press-fitting workability and reducing costs, and allowing each cylindrical vibration-damping device to be manufactured efficiently. In particular, in this aspect, even when 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 find a position that does not cause problems in terms of the bracket structure, and 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.

The fifth aspect is a method for manufacturing multiple types of cylindrical vibration isolators with brackets according to the fourth aspect, in which 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 on the mount support portion is movable in the press-fitting direction together with the mount positioning portion.

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

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

According to this aspect, it is possible to efficiently manufacture multiple types of bracket-equipped cylindrical vibration isolation devices described in any one of the first to third aspects.

According to the present invention and the method of the present invention, in any of the multiple types of cylindrical vibration isolation devices with brackets, each rubber mount body can be more efficiently press-fitted into the mounting hole of each bracket.

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; FIG. 2 is a bottom view of the first bracket-equipped cylindrical vibration isolator shown in FIG. FIG. 2 is an exploded perspective view of the first bracket-attached cylindrical vibration isolator shown in FIG. 1 . FIG. 3 is an enlarged longitudinal sectional view showing a cross section taken along the line IV-IV in FIG. 2. FIG. 2 is an enlarged plan view showing a rubber mount body constituting the first bracket-attached cylindrical vibration isolator shown in FIG. 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; FIG. 7 is a bottom view of the second bracket-equipped cylindrical vibration isolation device shown in FIG. FIG. 7 is an exploded perspective view of the second bracket-attached cylindrical vibration isolator shown in FIG. 6 . 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; 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. 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; 12A is a vertical cross-sectional view of a jig for press-fitting, showing a process for press-fitting a rubber mount body into a mounting hole of a bracket, (a) being a cross-section taken along line XII(a)-XII(a) in FIG. 11, and (b) showing the state after the rubber mount body has been press-fitted into the mounting hole of the bracket. 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.

The following describes an embodiment of the present invention with reference to the drawings.

Figures 1 to 4 show a first bracket-equipped motor mount 10 for electric vehicles as a first bracket-equipped cylindrical vibration isolation device, which is one of several types of bracket-equipped cylindrical vibration isolation devices as 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 Figure 2, the front-rear direction refers to the right-left direction in Figure 2, and the left-right direction refers to the direction perpendicular to the plane of the paper in Figure 2, that is, the direction toward the front.

More specifically, as shown in FIG. 3, the first bracket 12 is a hard member made of metal or fiber-reinforced synthetic resin, which extends in a direction perpendicular to the left-right direction as a whole. The first bracket 12 has a mounting hole 14 formed in the front part, which 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 dimension of the peripheral wall portion 18 is approximately constant in the axial direction (left-right direction) of the mounting hole 14. In addition, in the first bracket 12, the portion 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 a lightening hole and an insertion hole through which a mounting bolt is inserted. In this way, the mounting hole 14 is biased to one side (forward) in the first bracket 12, and lightening holes and bolt insertion holes are provided, so that the first bracket 12 has a non-rotationally symmetric structure around the central axis L1 of the mounting hole 14.

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 the jig 100 for press-fit assembly described later. The through hole 20 extends in the left-right direction, which is the press-fit 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 in the jig 100 for press-fit 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 separated by a predetermined distance A (see FIG. 2).

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 the main rubber elastic body 26.

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 in the shape of a substantially rectangular block, and each fastening portion 28 has a bolt hole 30 that penetrates 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. These 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.

The left-right intermediate portion of the inner shaft member 22 has a substantially elliptical cross section, and the outer peripheral surface of the left-right intermediate portion having the substantially elliptical cross section is located on the outer peripheral side of the outer peripheral surface of the fastening portion 28, which is the left-right end portion. That is, the outer peripheral surface of the inner shaft member 22 has an axial intermediate portion that protrudes outward from both axial end portions, and the axial intermediate portion having the substantially elliptical cross section protrudes outward from both axial end portions to form a fitting protrusion 32 that fits with the outer fitting protrusion 76 described later. In particular, in this embodiment, the fitting protrusion 32 has 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.

On the other hand, 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 the side where the protrusion 34 is provided (the left side in FIG. 4). The inner recess 36 has a certain opening dimension (the vertical dimension in FIG. 4) and depth dimension (the horizontal dimension in FIG. 4), and 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.

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.

The fitting protrusion 32, which is the axially intermediate portion of the inner shaft member 22, is inserted into the outer tubular 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 tubular 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 tubular 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 tubular member 24. The main rubber elastic body 26 with the rubber arms 38, 38 covers the surface of the fitting protrusion 32 of the inner shaft member 22 in 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 with 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 tube member 24 protrude outward in the left-right direction beyond the main rubber elastic body 26.

In the radial middle part of the main rubber elastic body 26, a first recessed hole 40 is provided on the radial opposite side (left side in FIG. 4) to the side where the protrusion 34 of the fitting protrusion 32 is provided. The first recessed hole 40 extends for a length less than half a circumference in the circumferential direction. In addition, in the radial middle part of the main rubber elastic body 26, a second recessed hole 42 is provided on the side where the protrusion 34 of the fitting protrusion 32 is provided (right side in FIG. 4) that penetrates in the axial direction (left and right direction). The second recessed hole 42 extends for a length less than half a circumference in the circumferential direction. A pair of rubber arms 38, 38 are arranged between the circumferential ends of the first recessed hole 40 and the second recessed hole 42. In this embodiment, as described below, the engagement positioning portion 132 that positions the rubber mount body 16 around the mount central axis M relative to the press-fitting jig 100 is 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.

The main rubber elastic body 26 has a first outer stopper rubber 44 that constitutes the wall portion on the opposite side of the inner shaft member 22 in the first recessed hole 40, and the first outer stopper rubber 44 is fixed to the inner peripheral 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 the circumferential center portion of the first recessed hole 40, 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.

The main rubber elastic body 26 is provided with a second outer stopper rubber 50 that constitutes the wall portion on the opposite side of the inner shaft member 22 in the second recessed hole 42, and the second outer stopper rubber 50 is fixed to the inner peripheral surface of the outer cylindrical member 24. The second outer stopper rubber 50 is provided with a second abutment protrusion 52 that 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 that 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.

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 at a distance 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.

A second inner stopper rubber 58 is fixed to the second recessed hole 42 side (right side in FIG. 4) of the fitting protrusion 32 of the inner shaft member 22. The second inner stopper rubber 58 covers the surface of the protruding portion 34 of the fitting protrusion 32 and faces the second outer stopper rubber 50 at a distance 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 on the opposite side to the first inner stopper rubber 56, and is provided integrally with the main rubber elastic body 26.

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 body 16, and the shape of the main rubber elastic body 26, including the shapes of the first recessed hole 40 and the second recessed hole 42, is different in the circumferential direction about the mount central axis M. Therefore, the rubber mount body 16 has a non-rotationally symmetrical structure about the mount central axis M.

In this 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 FIG. 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.

4, the fitting protrusion 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 and the first inner stopper rubber 56, which include the first abutment protrusion 46 and the first buffer protrusion 48. This forms a first axis-perpendicular stopper mechanism 60, which limits the amount of relative displacement between the inner shaft member 22 and the outer cylindrical member 24 in the axis-perpendicular direction. Also, when the inner shaft member 22 is displaced significantly to the right in FIG. 4, the protrusion 34 of the fitting protrusion 32 of the inner shaft member 22 and the outer cylindrical member 24 come into contact with each other via the second outer stopper rubber 50 and the second inner stopper rubber 58, which include the second abutment protrusion 52 and the second buffer protrusion 54. 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.

The first bracket-equipped motor mount 10 has a stopper member 64 that is 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. It is preferable that at least the portion of the stopper member 64 that constitutes the axial stopper mechanism 86 described below 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.

The stopper member 64 has a pair of side portions 66, 66 each having an approximately rectangular shape as a whole, and on the side of each side portion 66 opposite to the side connected to the outer portion 68, a mounting hole 70 is provided for mounting to the inner shaft member 22 of the rubber mount body 16. 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 an approximately elliptical shape as a whole, 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 substantially annular outer fitting protrusion 76 that protrudes inward in the opposing direction continuously around the entire circumference is integrally provided on the inner peripheral edge of each mounting hole 70. In addition, in the pair of side portions 66, 66, a concave-convex portion 78 is provided between the mounting hole 70 and the outer portion 68. The uneven portion 78 improves the cushioning function of the axial stopper mechanism 86 (described below) and reduces striking noise.

A protruding portion 80 that spreads outward (to the left in FIG. 4) is provided around the mounting hole 70 in the side portion 66. The protruding portion 80 has a generally semicircular shape when viewed from the left to right, and bulges outward in FIG. 4, and the outer peripheral edge shape of the protruding portion 80 is curved in the circumferential direction and convex outward. Note that 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.

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 explanation of the method of press-fitting the rubber mount body 16 into the mounting hole 14 will be given later, but first, a method of assembling the stopper member 64 to the first bracket 12 and the rubber mount body 16 will be described.

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 that protrudes 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 that protrude inward in the opposing direction (axially inward 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 the stopper member 64 is substantially entirely made of an elastic material such as rubber, 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 by pushing the pair of opposing side portions 66, 66 apart so that the opposing distance between them increases.

In this embodiment, the fitting protrusion 32 has a generally oval shape, and the mounting hole 70 through 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, the fitting protrusion 32 and the oval portion 72 in the mounting hole 70, each of which is non-circular, form a positioning mechanism 82 for the rubber mount body 16 and the stopper member 64 in the circumferential direction. In particular, in this embodiment, a protrusion 34 is provided on a portion of the outer circumferential surface of the fitting protrusion 32, and a protrusion 74 corresponding to the protrusion 34 is provided in the mounting hole 70, which also constitutes a circumferential positioning mechanism 82 between the rubber mount body 16 and the stopper member 64, achieving a higher degree of circumferential positioning.

The stopper member 64 is assembled in a circumferentially positioned state relative to the first bracket 12 and the rubber mount body 16 by the positioning mechanism 82, 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 that face each other 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.

In the first bracket-equipped motor mount 10 thus constructed, for example, the first bracket 12 is attached to a power unit side member 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 the 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 expands 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, sandwiching each portion of the side portion 66 and the overhanging portion 80 of the stopper member 64 between them.

In the first motor mount with bracket 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 (the vertical direction in FIG. 4), the relative axial displacement between the inner shaft member 22 and the outer cylindrical member 24 is limited by the axial stopper mechanism 86.

4, the first bracket 12 and the 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 forms 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 formed by including the side portion 66 and the protruding portion 80 of the stopper member 64.

Next, in Figures 6 to 8, a second bracket-equipped motor mount 90 for an electric vehicle is shown 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, like the first bracket-equipped motor mount 10 described above, has a structure in which a cylindrical rubber mount body 16 is press-fitted into a mounting hole 94 in a second bracket 92. In this embodiment, while the shape of the second bracket 92 is different from that of the first bracket 12, 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.

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, except for the second bracket 92. The same members and parts as those of the first bracket-equipped motor mount 10 are denoted in the drawings with the same reference numerals as those in the first bracket-equipped motor mount 10, and detailed descriptions thereof will be omitted. Note that the orientation of the second bracket-equipped motor mount 90 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. 7, the front-rear direction refers to the right-left direction in FIG. 7, and the left-right direction refers to the direction perpendicular to the plane of the paper in FIG. 7, that is, the direction toward the front.

The second bracket 92 is shaped to be suitable for mounting to a power unit such as a motor. A mounting hole 94 is formed in the front portion, and holes for inserting mounting bolts are appropriately provided in portions other than the mounting hole 94. As a result, the second bracket 92 has a non-rotationally symmetric structure around 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 around the central axis L3 of the mounting hole 94 relative to a jig 100 for press-fit 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 located rearward of the central axis L3 of the mounting hole 94, and is spaced apart 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 the pin-shaped protrusion 106 in the press-fit assembly jig 100 described below.

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 mutually the same.

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 attached 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 that face each other 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.

Although not shown, the second bracket-equipped motor mount 90 configured as described above is similar to the first bracket-equipped motor mount 10 in that, for example, the second bracket 92 is attached to a power unit side member 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, in the second bracket-equipped motor mount 90, when an impactive 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 bracket-equipped motor mount 10, and limits the 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, an axial stopper mechanism is formed including the side portion 66 and the protruding portion 80 of the stopper member 64.

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

9, the press-fitting jig 100 has a substantially rectangular base plate 102 extending in the front-rear direction at its lower end. The rear end of the base plate 102 has a plurality of pedestals 104a, 104b protruding upward in accordance with the shape of the expected bracket (in this embodiment, the first bracket 12 and the second bracket 92). The protruding height of the plurality of pedestals 104a, 104b is appropriately set in accordance with the shape of the expected bracket. In addition, the rear portion of the base plate 102 has a pin-shaped protrusion 106 protruding upward. 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.

Furthermore, at the front end portion of the base plate portion 102, a cylindrical accommodating portion 108 is provided protruding upward to accommodate the mount support portion 112 when the rubber mount body 16 is pressed into the bracket (first bracket 12 and second bracket 92) described later. In this embodiment, the cylindrical accommodating portion 108 has a bottomed cylindrical shape having a bottom plate portion 110, and as shown in the plan view in FIG. 11, the central axis L5 of the cylindrical accommodating portion 108 is located forward of the central axis L6 of the pin-shaped protrusion 106 and is separated by a predetermined distance C (see FIG. 11). The separation distance C between the central axis L5 of the cylindrical accommodating portion 108 and the central axis L6 of the pin-shaped protrusion 106 is approximately 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. In addition, the central axis L5 of the cylindrical storage 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 storage portion 108 in FIG. 11 bulges outward beyond the base plate portion 102.

The press-fitting jig 100 is provided with a mount support 112 that supports the rubber mount body 16 in the press-fitting direction (vertical direction). The mount support 112 is generally cylindrical with a bottom, and has a circular bottom wall 114 and a peripheral wall 116 that protrudes upward from the outer periphery of the bottom wall 114. An inner shaft accommodating portion 118 that protrudes upward is provided in the center of the bottom wall 114, and the inner shaft accommodating portion 118 has 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 116.

Furthermore, in the mount support portion 112, a positioning pin 122 that protrudes upward is provided between the inner shaft housing portion 118 and the peripheral wall portion 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 portion 112 as described below, 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 portion 110 of the cylindrical housing portion 108, penetrate the bottom wall portion 114 of the mount support portion 112, and are provided protruding above the peripheral wall portion 116.

The outer diameter of the mount support 112 having such a shape is slightly smaller than the inner diameter of the cylindrical housing 108, and the mount support 112 is arranged coaxially with the cylindrical housing 108, so that the mount support 112 can be accommodated on the inner periphery of the cylindrical housing 108. Here, a spring 124 is provided between the bottom plate 110 of the cylindrical housing 108 and the bottom wall 114 of the mount support 112, and the spring 124 biases the mount support 112 upward, in the direction away from the bottom plate 110. In this embodiment, the natural length of the spring 124 is approximately equal to the vertical dimension in the internal space of the cylindrical housing 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 112 is located above the cylindrical housing 108. In addition, in this embodiment, the outer diameter of the mount support portion 112 is slightly smaller than the outer diameter of the mounting holes 14, 94 in each bracket 12, 92 and the outer diameter of the rubber mount body 16 (the outer diameter of the outer tubular member 24).

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

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. Figure 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 Figure 10, the second bracket 92 and the rubber mount body 16 are set on the press-fit assembly jig 100.

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 apart from each other in the front-rear direction by a distance B, and in the press-fit assembly jig 100, 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 are spaced apart from each other in the front-rear direction by a distance C, and these distances B and C are approximately equal to each other. As a result, when the second bracket 92 is placed on the press-fit assembly jig 100, 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 press-fit assembly jig 100, and the peripheral wall portion 18 constituting the mounting hole 94 is supported on the upper end surface of the cylindrical housing portion 108 located on the outer periphery side of the mount support portion 112.

10, two parts of the press-fit assembly jig 100 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 press-fit assembly jig 100 around the central axis L3 of the mounting hole 94. Therefore, the bracket positioning portion of the press-fit assembly jig 100 is composed of a pin-shaped protrusion 106 that is inserted into the through hole 96 in the second bracket 92, and the second bracket 92 is set in the press-fit assembly jig 100 with the concave-convex positioning portion (through hole 96) of the second bracket 92 positioned circumferentially relative to the mounting hole 94 (in this embodiment, the through hole 96 is located behind the mounting hole 94).

The rubber mount body 16 is supported by the mount support part 112 of the press-fitting jig 100. Specifically, the positioning pins 122, 122 are inserted into the first recessed hole 40 of the rubber mount body 16, and one fastening part 28 (lower in FIG. 12) 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.

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 approximately rectangular, with one of the four corners being cut out in particular. As a result, the rubber mount body 16 is supported in a state where it is positioned circumferentially 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 recess 40 in the rubber mount body 16, so that the rubber mount body 16 is supported in a state where it is positioned circumferentially relative to the mount support portion 112.

Therefore, in this embodiment, the engagement positioning portion 132 that positions the rubber mount body 16 around 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 peripheral surface shape of the inner shaft member 22 and the first recessed hole 40 through which the positioning pins 122, 122 are inserted. In addition, the mount positioning portion 133 that positions the engagement positioning portion 132 in the circumferential direction is formed by the inner peripheral surface shape of the accommodation recess 120 and the positioning pins 122, 122.

That is, in the second bracket 92, the concave-convex positioning portion, through which the pin-shaped protrusion 106 of the press-fitting jig 100 is inserted to position the second bracket 92 relative to the press-fitting jig 100 about the central axis L3 of the mounting hole 94, is constituted by the through hole 96. Also, the engagement positioning portion 132, which is provided on the rubber mount body 16 and positions the rubber mount body 16 relative to the press-fitting jig 100 about the mount central axis M, is constituted by the outer peripheral surface shape of the inner shaft member 22, which is non-circular, 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 separated in the front-rear direction, and the separation distance can be understood as the separation distance B between the central axis L4 of the through hole 96 and the central axis L3 of the mounting hole 94.

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-fit assembly. 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, and the rubber mount body 16 is pressed 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-fit 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-fit direction. In addition, 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 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. In addition, during such a press-fitting operation, the air inside the cylindrical housing portion 108 is released to the outside through the escape portion 126, so that the air inside the cylindrical housing portion 108 is prevented from affecting the press-fitting operation.

Also, FIG. 13 shows how the rubber mount body 16 is pressed into the first bracket 12 using a press-fit assembly jig 100. That is, when the rubber mount body 16 is pressed into the first bracket 12, the first bracket 12 and the rubber mount body 16 are set on the press-fit assembly jig 100 that is also used for the second bracket 92.

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 spaced from each other in the front-to-rear direction by a separation distance A, which is approximately equal to the 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. In addition, 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 on which the second bracket 92 is supported in the press-fit 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 housing portion 108 located on the outer periphery of the mount support portion 112.

That is, in this embodiment, two portions of the press-fit assembly 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 assembly jig 100 around the central axis L1 of the mounting hole 14. In other words, the first bracket 12 is set in the press-fit assembly jig 100 with the concave-convex positioning portion (through hole 20) of the first bracket 12 positioned circumferentially relative to the mounting hole 14 (in this embodiment, the through hole 20 is positioned behind the mounting hole 14).

As when the rubber mount body 16 is press-fitted into the second bracket 92 shown in Figs. 10-12, when the rubber mount body 16 is press-fitted into the first bracket 12, the rubber mount body 16 is supported against the mount support portion 112 of the press-fitting assembly jig 100. As a result, the rubber mount body 16 is supported in a state where it is positioned circumferentially relative to the mount support portion 112. The circumferential positioning of the rubber mount body 16 and the mount support portion 112 is achieved by 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 being non-circular shapes that correspond to each other, and/or by the positioning pins 122, 122 being inserted into the first recessed hole 40 in the rubber mount body 16.

That is, in the first bracket 12, the uneven positioning portion that positions the first bracket 12 about the central axis L1 of the mounting hole 14 relative to the press-fit assembly jig 100 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 uneven positioning portion (through hole 20) and the engagement positioning portion 132 are separated in the front-to-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-attached cylindrical vibration isolation devices (motor mounts with first and second brackets 12, 92) that have different brackets (first and second brackets 12, 92), the positional relationship between the concave-convex positioning portion and the engagement positioning portion 132 is relatively the same around the axis (center axes L1, L3 of the mounting holes 14, 94 and the mount center axis M).

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 way, 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. Then, from this state, as in the case of the second bracket 92 shown in FIG. 12(a), the rubber mount body 16 is press-fitted into the mounting hole 14 by the second jig 134 for the first bracket 12, completing the press-fitting operation. That is, when the rubber mount body 16 is pressed into the mounting hole 14, 94 in the first and second bracket-attached motor mounts 10, 90, even though the brackets (first and second brackets 12, 92) have different shapes, a common press-fitting assembly jig 100 is used, and the press-fitting is achieved with the concave-convex positioning portion (through hole 20, 96) and the engagement positioning portion 132 of each bracket 12, 92 held in the same relative positional relationship around the axis (center axis L1, L3 and mount center axis M).

In the multiple types of cylindrical vibration isolation devices with brackets (first motor mount with bracket 10 and second motor mount with bracket 90) of this embodiment constructed as described above, although the shapes of the brackets (first bracket 12 and second bracket 92) are different from each other, the concave and convex positioning portions (through holes 20, 96) of each bracket 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 press-fit assembly jig 100, 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 press-fit assembly jig 100. Then, when each bracket 12, 92 and rubber mount body 16 are set on the press-fit assembly jig 100, the central axes L1, L3 of the mounting holes 14, 94 in each bracket 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, 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 isolation device.

In this embodiment, through holes 20, 96 are provided through each bracket 12, 92 as concave/convex positioning parts 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 that are inserted into each through hole 20, 96, and each bracket 12, 92 is set in a positioned state relative to the jig 100 for press-fit assembly by the simple operation of inserting the pin-shaped protrusions 106 into each through hole 20, 96. In particular, by providing the through holes 20, 96 in each bracket 12, 92, it is possible to form concave/convex positioning parts without providing parts that protrude outward from the bracket.

In addition, in this embodiment, the outer peripheral surface shape of the inner shaft member 22 and the first recessed hole 40 are provided as the engagement positioning portion 132 that positions the rubber mount body 16 around the mount central axis M relative to the press-fit assembly jig 100. Meanwhile, the mount support portion 112 of the press-fit assembly jig 100 is provided with a housing recess 120 having an inner peripheral surface shape corresponding to the outer peripheral surface shape of the inner shaft member 22 and a positioning pin 122, 122 that is 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 assembly 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.

When the rubber mount body 16 is set on 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 accommodation recess 120 in the mount positioning portion 133, so the rubber mount body 16 can be press-fitted into the mounting holes 14, 94 of the brackets 12, 92 while maintaining its circumferentially positioned state.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the specific descriptions.

In the above embodiment, the first and second bracket-equipped motor mounts 10, 90 have different brackets (first and second brackets 12, 92) and the same rubber mount body 16 is attached to each bracket 12, 92. However, multiple types of bracket-equipped cylindrical vibration-damping devices may be configured, for example, by attaching different rubber mount bodies to brackets of different shapes. Note that the present invention does not limit the objects to which each cylindrical vibration-damping device that is combined with each other to configure multiple types of cylindrical vibration-damping devices may be attached. 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.

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.

The shape of the rubber mount body is not limited as long as it is 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 outer peripheral surface shape of the inner shaft member 22, which is non-circular, and the first recessed hole 40 through 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.

In the above embodiment, the first and second brackets 12, 92 are provided with through holes 20, 96, and the press-fit assembly jig 100 is provided with 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 press-fit assembly jig 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 cross sections of these through holes (or bottomed recesses) and pin-shaped protrusions do not need to be circular, and may be non-circular.

The shape of the press-fit assembly jig is not limited. For example, in the above embodiment, the pedestal portions 104a and 104b provided at the rear end of the press-fit assembly jig 100 are not essential, and each bracket may have a mounting support portion inserted into the mounting hole, with the peripheral portion of the mounting hole supported on the upper end surface of the cylindrical housing portion.

In the above embodiment, a bracket-equipped motor mount for an electric vehicle is exemplified as a bracket-equipped cylindrical vibration-damping device, but the bracket-equipped cylindrical vibration-damping device of the present invention may also be a bracket-equipped engine mount or differential mount for an automobile, or a bracket-equipped cylindrical vibration-damping device for a non-automotive use, etc.

In the above embodiment, two types of bracket-attached cylindrical vibration-damping devices (first and second bracket-attached motor mounts 10, 90) are shown as multiple types of bracket-attached cylindrical vibration-damping devices, but the bracket-attached cylindrical vibration-damping devices may be of three or more types, 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-attached cylindrical vibration-damping devices.

10 First bracket-attached motor mount (multiple types of bracket-attached cylindrical vibration-isolating devices, first bracket-attached cylindrical vibration-isolating device)
12 First bracket 14 Mounting hole 16 Rubber mount body 18 Peripheral wall portion 20 Through hole (concave-convex positioning portion)
[0033] 22 Inner shaft member 24 Outer cylindrical member 26 Main rubber elastic body 28 Fastening portion 30 Bolt hole 32 Fitting projection 34 Projecting portion 36 Inner recess 38 Rubber arm 40 First recessed hole 42 Second recessed hole 44 First outer stopper rubber 46 First abutting projection 48 First buffer projection 50 Second outer stopper rubber 52 Second abutting projection 54 Second buffer projection 56 First inner stopper rubber 58 Second inner stopper rubber 60 First axis-perpendicular stopper mechanism 62 Second axis-perpendicular stopper mechanism 64 Stopper member 66 Side portion 68 Outer portion 70 Mounting hole 72 Elliptical portion 74 Projecting portion 76 External fitting projection 78 Concave-convex portion 80 Projecting portion 82 (in the circumferential direction) positioning mechanism 84 Counterpart member 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 portion)
100: Jig for press-fitting 102: Base plate portion 104a, 104b: Pedestal portion 106: Pin-shaped protrusion (bracket positioning portion)
108 Cylindrical accommodating portion 110 Bottom plate portion 112 Mount support portion 114 Bottom wall portion 116 Peripheral wall portion 118 Inner shaft accommodating portion 120 Accommodating recess 122 Positioning pin 124 Spring 126 Recess portion 131 Support surface 132 Engagement positioning portion 133 Mount positioning portion 134 Second jig L1 Central axis L2 of mounting hole (in first bracket) Central axis L3 of through hole (in first bracket) Central axis L4 of mounting hole (in second bracket) Central axis L5 of through hole (in second bracket) Central axis L6 of cylindrical peripheral wall portion (in jig for press-fit assembly) Central axis M of pin-shaped protrusion (in jig for press-fit assembly) Central axis of mount (in rubber mount body)

Claims (5)

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-damping devices with brackets, the concave and convex positioning portion around the axis relative to the jig for press-fit assembly provided on the bracket and the engagement positioning portion around the axis relative to the jig for press-fit assembly provided on the rubber mount body are in the same relative positional relationship around the axis. Multiple types of bracket-attached cylindrical vibration isolation devices as described in claim 1, in which the uneven 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. Multiple types of bracket-attached cylindrical vibration isolation devices according to claim 1 or 2, in which 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. 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. The method for manufacturing multiple types of cylindrical vibration isolation devices with brackets described in claim 4, in which the press-fitting assembly jig is provided with a mount support part that supports the rubber mount body in the press-fitting direction, and the support surface of the rubber mount body on the mount support part is movable in the press-fitting direction together with the mount positioning part.

Images