Anti-vibration device

Abstract

To provide an anti-vibration device with a new structure which can position a second attachment member and a bracket in a simple configuration.SOLUTION: In an anti-vibration device 10, fitting parts 32, 32 of a second attachment part 24 are inserted into fitting grooves 110, 110 of a bracket 16 to assemble the bracket 16 to the second attachment member 24 in a lateral direction. The fitting part 32 extending in a lateral direction is rubber-pressed in the fitting groove 110 via a fitting rubber 54. A caulking pin 34 of the fitting part 32 is inserted into a pin insertion hole 114 that penetrates a depth wall part 112 of the fitting groove 110, and a rear end part of the fitting part 32 having press-in projections 36, 38 is pressed in and fixed to the fitting groove 110, so that a positioning structure between the second attachment member 24 and the bracket 16 is configured. A anti-loosening structure is configured in which the caulking pin 34 is caulked and fixed to the pin insertion hole 114 in a positioned state by the positioning structure to prevent a release of the second attachment member 24 from the bracket 16.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an anti-vibration device for use in engine mounts of automobiles, etc. [Background technology]

[0002] Conventionally, there are known anti-vibration devices used in automobile engine mounts, etc. As disclosed in, for example, JP 2017-082991 A (Patent Document 1), the anti-vibration device has a structure in which a first mounting member and a second mounting member are connected by a main rubber elastic body.

[0003] In addition, in the vibration isolation device of Patent Document 1, guide parts provided on both sides of the second mounting member in the width direction are inserted into guide grooves of the bracket, so that the bracket is attached laterally to the second mounting member. In the embodiment of Patent Document 1, a covering rubber is provided on the surface of the guide part, and the guide part is rubber-pressed into the guide groove via the covering rubber. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-082991 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the vibration isolation device shown in Patent Document 1 has a crimping pin protruding from the tip of the guide groove in the guide part of the second mounting member, and the crimping pin is inserted into the crimping hole of the bracket and compressed in the axial direction, so that the crimping pin is pressed against the inner surface of the crimping hole and crimped and fixed. This prevents the second mounting member from coming off the bracket, and holds the bracket attached to the second mounting member in a predetermined position.

[0006] However, when compressing the crimping pin (crimping), it is difficult to hold the second mounting member and the bracket in an appropriate relative position. For example, in an embodiment of Patent Document 1 in which the guide portion is rubber-pressed into the guide groove via a rubber covering, the relative position between the second mounting member and the bracket may change due to the input during crimping and fixing, if the holding force is only due to the rubber being pressed into the guide groove of the guide portion. It is also possible to perform crimping while biasing the guide portion in the press-in direction, but in this case, it is necessary to input in two directions, the direction in which the guide portion is biased and the direction in which the crimping pin is compressed, and special equipment for processing is required.

[0007] An object of the present invention is to provide a vibration isolation device having a novel structure that can appropriately position the second mounting member and the bracket with a simple structure. [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] In a first aspect, a first mounting member and a second mounting member are connected by a main rubber elastic body, and fitting portions provided on both sides in the width direction of the second mounting member are inserted into fitting grooves that open into opposing inner surfaces on both sides in the width direction of the bracket, thereby forming a vibration-proof device in which the bracket is assembled to the second mounting member from the side, the fitting portions extend in the lateral direction in which they are inserted into the fitting grooves, a fitting rubber is fixed to a middle portion of the fitting portion in the lateral direction, and the middle portion of the fitting portion is rubber-pressed into the fitting groove via the fitting rubber, the fitting portion is provided with a caulking pin that protrudes in the lateral direction from a tip surface, and a pin insertion hole is formed in a back wall portion of the fitting groove that faces the tip surface of the fitting portion. is formed through the second mounting member, and the crimping pin is inserted into the pin insertion hole by rubber being pressed into the mounting groove of the mounting portion, a press-in protrusion protruding toward the inner surface of the mounting groove is integrally formed at the rear end portion of the mounting portion, and the portion of the mounting portion where the press-in protrusion is formed is pressed and fixed into the mounting groove by rubber being pressed into the mounting groove of the mounting portion, thereby forming a positioning structure for positioning the second mounting member and the bracket relative to each other, and a pull-out prevention structure for preventing the second mounting member from coming off the bracket is formed by the crimping pin being crimped and fixed into the pin insertion hole with the second mounting member and the bracket positioned relative to each other by the positioning structure.

[0010] In an anti-vibration device constructed according to this aspect, the fitting portion of the second mounting member is press-fitted and fixed into the fitting groove of the bracket at the portion where the press-fit protrusion is formed without using press-fit rubber, so that the second mounting member and the bracket are positioned relative to each other in the lateral direction, which is the assembly direction. This makes it possible to prevent the second mounting member from displacing relative to the bracket in the direction of coming out when the crimping pin of the second mounting member inserted into the pin insertion hole of the bracket is compressed and the crimping pin is crimped and fixed to the pin insertion hole at an appropriate position.

[0011] In a second aspect, in the vibration-isolating device according to the first aspect, the press-fitting protrusion is provided partially in the width direction of the fitting portion.

[0012] With an anti-vibration device constructed according to this embodiment, the area over which the press-in projection fits into the fitting groove can be adjusted by adjusting the width of the press-in projection, which makes it possible to appropriately obtain the positioning and holding force between the second mounting member and the bracket required for pin crimping while suppressing the force required to press the portion of the fitting portion where the press-in projection is formed into the fitting groove.

[0013] A third aspect is an anti-vibration device as described in the first or second aspect, in which the press-in protrusion is arranged to protrude from the fitting portion in the opposing direction of the pair of groove side surfaces of the fitting groove.

[0014] According to the vibration-proof device constructed according to this embodiment, the portion of the fitting portion where the press-in protrusion is formed is press-fitted between a pair of groove side surfaces of the fitting groove, so that the variation in the press-in fixing force due to dimensional errors, etc. is relatively small. Also, since the press-in reaction force acts on the fitting portion and is unlikely to act on other portions of the second mounting member, distortion of the second mounting member due to the press-in reaction force is prevented.

[0015] A fourth aspect is a vibration-damping device as described in the third aspect, in which the press-in protrusion is provided protruding from the fitting portion toward both sides in the opposing directions of a pair of groove side surfaces of the fitting groove.

[0016] With an anti-vibration device constructed in accordance with this embodiment, the press-in protrusions on both sides are pressed in so that they abut against each of a pair of groove side surfaces, so that when the portion of the fitting portion where the press-in protrusions are formed is pressed into the fitting groove, tilting of the fitting portion is prevented compared to when the press-in protrusion is provided on only one side.

[0017] In a fifth aspect, in the vibration-proof device according to the fourth aspect, the pair of press-fit projections projecting on both sides from the fitting portion are provided at positions facing each other.

[0018] With an anti-vibration device constructed in accordance with this embodiment, the reaction force acting on the fitting portion is offset by the portion where the pair of press-fitting protrusions are formed when the fitting portion is pressed into the fitting groove, thereby preventing the fitting portion from tilting, etc.

[0019] A sixth aspect is the vibration-proof device according to any one of the third to fifth aspects, wherein the fitting portion and the groove bottom surface of the fitting groove are spaced apart from each other in the width direction.

[0020] With an anti-vibration device constructed according to this aspect, it is possible to avoid an increase in resistance when the rubber is pressed in, which would be caused by direct contact between the fitting portion and the bottom surface of the fitting groove. Also, by separating the fitting portion and the bottom surface of the fitting groove in the width direction, in which dimensional tolerances tend to become large, it becomes easier to prevent assembly failures between the second mounting member and the bracket.

[0021] A seventh aspect is an anti-vibration device described in any one of the third to sixth aspects, wherein the press-in protrusion is partially provided in the width direction in the fitting portion, and the press-in protrusion is biased toward the outside of the fitting portion in the width direction.

[0022] Since the inner portion of the fitting portion in the width direction may be located more inward than the groove side surface of the fitting groove, if the press-in protrusion is provided on the inner portion of the fitting portion, there is a risk that the portion of the fitting portion where the press-in protrusion is formed will not be press-fitted into the fitting groove. According to the vibration-proof device constructed according to this aspect, the press-in protrusion is provided biased toward the outer side of the fitting portion in the width direction, so that the portion of the fitting portion where the press-in protrusion is formed is more reliably press-fitted into the fitting groove. Effect of the Invention

[0023] According to the present invention, in the vibration isolation device, the second mounting member and the bracket can be appropriately positioned with a simple structure. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a perspective view showing an engine mount according to a first embodiment of the present invention; [Diagram 2] Right side view of the engine mount shown in Figure 1 [Diagram 3] FIG. 3 is a vertical cross-sectional view of the engine mount shown in FIG. 1, which corresponds to the cross-section III-III of FIG. [Figure 4] IV-IV cross section of Figure 2 [Diagram 5] VV cross section of Figure 2 [Figure 6] FIG. 2 is a perspective view of a mount body constituting the engine mount shown in FIG. 1. [Figure 7] A longitudinal cross-sectional view of the mount body shown in Figure 6 [Figure 8] FIG. 7 is a perspective view of a vibration-isolating base constituting the mount body shown in FIG. [Figure 9] FIG. 9 is a front view of the vibration-isolating base shown in FIG. [Figure 10] FIG. 9 is a plan view of the vibration-isolating base shown in FIG. [Figure 11] A bottom view of the vibration-isolating base shown in FIG. [Figure 12] Right side of the vibration-isolating base shown in Figure 8 [Figure 13] XIII-XIII sectional view of Figure 12 [Figure 14] Sectional view XIV-XIV of Fig. 12 [Figure 15] FIG. 7 is a perspective view of a cup member constituting the mount body shown in FIG. [Figure 16] Sectional view of Figure 2 taken along the line XVI-XVI [Figure 17] Sectional view of FIG. 16 taken along the line XVII-XVII [Figure 18A] FIG. 3 is a cross-sectional view corresponding to the XVIII-XVIII cross section of FIG. 2, showing a state before the fitting portion of the mount body is fitted into the fitting groove of the outer bracket. [Figure 18B] FIG. 1 is a cross-sectional view corresponding to the XVIII-XVIII cross section of FIG. 2, showing a state in which the fitting portion of the mount body is being fitted into the fitting groove of the outer bracket. [Figure 18C] FIG. 1 is a cross-sectional view corresponding to the XVIII-XVIII cross section of FIG. 2, showing a state after the fitting portion of the mount body is fitted into the fitting groove of the outer bracket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0026] 1 to 5 show an engine mount 10 for an automobile as a first embodiment of a vibration-proof device constructed according to the present invention. The engine mount 10 has a structure in which an inner bracket 14 and an outer bracket 16 are attached to a mount body 12 shown in Figs. 6 and 7. The mount body 12 has a structure in which a vibration-proof base 18 shown in Figs. 8 to 14 is rubber-pressed into a cup member 20 shown in Fig. 15. In the following description, in principle, the up-down direction refers to the up-down direction in Fig. 2 which is the mount central axis direction which is the main load input direction, the front-rear direction refers to the left-right direction in Fig. 2 which is the width direction of the engine mount 10, and the left-right direction refers to the left-right direction in Fig. 4 which is the lateral direction of the engine mount 10.

[0027] The vibration-isolating base 18 has a structure in which a first mounting member 22 and a second mounting member 24 are connected by a main rubber elastic body 26. As shown in Figures 3 and 4, the first mounting member 22 is generally cylindrical or has an inverted truncated cone shape that decreases in diameter downward, and is provided with a screw hole 28 that opens to the top surface. The first mounting member 22 is a highly rigid member and may be made of, for example, fiber-reinforced synthetic resin, but is preferably made of a metal such as an aluminum alloy.

[0028] 3 to 5, the second mounting member 24 is a generally rounded rectangular tube with arc-shaped corners, and has a flat shape with a pair of long sides extending in the front-rear direction and a pair of short sides extending in the left-right direction when viewed in the axial direction. The second mounting member 24 also has a flange-like portion 30 protruding from the upper end toward the outer periphery, and fitting portions 32 extending linearly in the left-right direction are integrally formed on both the front and rear outer sides of the flange-like portion 30 provided on the pair of short sides.

[0029] The fitting portion 32 is generally rectangular prism-shaped, with the vertical width gradually decreasing toward the left. A cylindrical crimping pin 34 protruding toward the left is integrally formed on the left end face of the fitting portion 32. The second mounting member 24 is a highly rigid member, and similar to the first mounting member 22, is preferably made of fiber-reinforced synthetic resin, metal, or the like. The second mounting member 24 has a larger diameter than the first mounting member 22.

[0030] As shown in Figs. 8 to 14, an upper press-in protrusion 36 is integrally formed at the right end of the fitting portion 32 as a press-in protrusion protruding from the upper surface. The upper press-in protrusion 36 is formed to protrude upward with a substantially rectangular cross section. The upper press-in protrusion 36 has a protruding height in the up-down direction smaller than its length in the left-right direction and its width in the front-rear direction. The left-right length of the upper press-in protrusion 36 is sufficiently smaller than the left-right length of the fitting portion 32, and is preferably 1 / 10 or less, more preferably 1 / 15 or less, of the left-right length of the fitting portion 32. The upper press-in protrusion 36 has a width in the front-rear direction smaller than the width in the front-rear direction at the right end of the fitting portion 32, and is partially provided in the front-rear direction at the right end of the fitting portion 32. The width in the front-rear direction of the upper press-in protrusion 36 is preferably half or less, more preferably 1 / 3 or less, of the width in the front-rear direction at the right end of the fitting portion 32. The upper press-fitting protrusion 36 is desirably disposed outwardly relative to the center in the front-rear direction of the fitting portion 32, and in this embodiment, the entire upper press-fitting protrusion 36 is located outwardly of the center in the front-rear direction of the fitting portion 32. The upper surface of the upper press-fitting protrusion 36 is a flat surface substantially parallel to the upper surface of the fitting portion 32, and is an inclined surface that slopes downward toward the left. This makes the protruding height dimension of the upper press-fitting protrusion 36 from the fitting portion 32 substantially constant.

[0031] In addition, a lower press-in protrusion 38 is integrally formed at the right end of the fitting portion 32 as a press-in protrusion protruding from the lower surface. The lower press-in protrusion 38 is formed to protrude downward with a substantially rectangular cross section similar to the upper press-in protrusion 36. The lower press-in protrusion 38 has a protruding height in the up-down direction smaller than its length in the left-right direction and its width in the front-rear direction. The left-right length of the lower press-in protrusion 38 is sufficiently smaller than the left-right length of the fitting portion 32, and is preferably 1 / 10 or less, more preferably 1 / 15 or less, of the left-right length of the fitting portion 32. The lower press-in protrusion 38 has a width in the front-rear direction smaller than the width at the right end of the fitting portion 32, and is partially provided in the front-rear direction at the right end of the fitting portion 32. The width in the front-rear direction of the lower press-in protrusion 38 is preferably half or less, more preferably 1 / 3 or less, of the width at the right end of the fitting portion 32. The lower press-fitting protrusion 38 is desirably disposed so as to be biased toward the front-rear outer side with respect to the front-rear center of the fitting portion 32, and in this embodiment, the entire lower press-fitting protrusion 38 is located outside the front-rear center of the fitting portion 32. The lower surface of the lower press-fitting protrusion 38 is a flat surface substantially parallel to the lower surface of the fitting portion 32, and extends substantially perpendicular to the up-down direction. This ensures that the protruding height dimension of the lower press-fitting protrusion 38 from the fitting portion 32 is substantially constant.

[0032] In this embodiment, the lower press-fit protrusion 38 has substantially the same length in the left-right direction and width in the front-rear direction as the upper press-fit protrusion 36, and has a smaller protruding height in the up-down direction than the upper press-fit protrusion 36. The upper and lower press-fit protrusions 36, 38 are provided at substantially the same positions in the left-right direction and front-rear direction, facing each other in the up-down direction, and overlap each other when projected in the up-down direction. As shown in Fig. 12, the right end of the fitting portion 32 has a vertical thickness dimension D at a portion where the upper and lower press-fit protrusions 36, 38 are formed, which is larger than a vertical thickness dimension d at a portion outside the upper and lower press-fit protrusions 36, 38 in the front-rear direction.

[0033] As shown in Fig. 13, the first mounting member 22 is disposed above the second mounting member 24 on approximately the same central axis, and a main rubber elastic body 26 is disposed between the first mounting member 22 and the second mounting member 24. The main rubber elastic body 26 is approximately frustum-shaped with an outer circumferential surface tapered to a larger diameter downward, and the first mounting member 22 is inserted into the upper end, which is the small diameter end, and vulcanization-bonded thereto, while the second mounting member 24 is superimposed on and vulcanization-bonded to the outer circumferential surface of the lower end, which is the large diameter end. In this way, the main rubber elastic body 26 is formed as an integrally vulcanization-molded product including the first mounting member 22 and the second mounting member 24, and the vibration-proof base 18 of this embodiment is constituted by the integrally vulcanization-molded product of the main rubber elastic body 26. The second mounting member 24, which is fixed to the main rubber elastic body 26, has an upper part integrally formed with a fixing part 40 that protrudes toward the inner circumference, and the inner diameter of the upper part where the fixing part 40 is provided is smaller than the inner diameter of the lower part (press-fitted cylindrical part 42) free from the fixing part 40. The inner peripheral surface of the fixing part 40 is tapered so that the diameter decreases downward.

[0034] A recess 44 that opens downward is formed in the main rubber elastic body 26. The recess 44 is shaped like an inverted cone with a smaller diameter toward the upper base side, and is provided on the inner periphery side of the fastening portion 40 of the second mounting member 24. By forming the recess 44, the portion of the main rubber elastic body 26 that connects the first mounting member 22 and the second mounting member 24 has a tapered shape in which both the inner diameter and the outer diameter increase downward.

[0035] The press-fit tube portion 42, which is the lower portion of the second mounting member 24, is covered with a rubber layer 46 integrally formed with the main rubber elastic body 26. The rubber layer 46 is provided so as to cover the entire inner peripheral surface and the lower portion of the outer peripheral surface of the press-fit tube portion 42. The inner peripheral rubber 48 covering the inner peripheral surface of the press-fit tube portion 42 in the rubber layer 46 is thicker at the upper portion than at the lower portion, and the thicker outer peripheral portion of the upper portion is fixed to the lower surface of the fixing portion 40, and is integrally continuous with the main rubber elastic body 26 at the inner peripheral end portion of the upper portion. In addition, the portion of the rubber layer 46 covering the outer peripheral surface of the press-fit tube portion 42 is made of a press-fit rubber 50. The press-fit rubber 50 is formed so as to cover substantially the entire outer peripheral surface of the press-fit tube portion 42. The outer peripheral surface of the lower portion of the press-fit rubber 50 is tapered so as to become smaller in diameter downward.

[0036] The portion of the rubber layer 46 covering the lower surface of the press-fit tubular portion 42 is a seal rubber 52. The seal rubber 52 is formed continuously around the entire circumference with a tapered cross-sectional shape that narrows radially downward. The portion of the seal rubber 52 with the maximum protruding height is disposed at a position that overlaps with the lower surface of the press-fit tubular portion 42 when projected in the up-down direction. The maximum thickness (protruding height) of the seal rubber 52 is made larger than the thicknesses of the inner circumferential rubber 48 and the press-fit rubber 50.

[0037] 6 to 12, a rubber fitting 54 formed integrally with the main rubber elastic body 26 is fixed to the fitting portion 32 of the second mounting member 24. The rubber fitting 54 is provided on a portion of the fitting portion 32 in the left-right direction, and covers both the front and rear and the top and bottom of the fitting portion 32. In this embodiment, a step is provided in the portion of the rubber fitting 54 covering both the top and bottom of the fitting portion 32, and the front and rear outer sides of the step are thicker than the inner side. In this embodiment, the rubber fitting 54 has a right side portion with a substantially constant top-bottom outer dimension in the left-right direction, and a left side portion with a gradually smaller top-bottom outer dimension toward the left, and is thicker in the middle in the left-right direction.

[0038] 15, the cup member 20 is integrally provided with a peripheral wall portion 56 having a generally rounded rectangular tubular shape corresponding to the second mounting member 24, and a bottom wall portion 58 provided to close a lower opening of the peripheral wall portion 56. Although the cup member 20 is a hard member, it is desirable that radial bending deformation is allowed to a certain extent, particularly at the base press-fit portion 62, and although it may be made of metal, it is preferably formed of a hard synthetic resin (including fiber-reinforced synthetic resin).

[0039] The peripheral wall portion 56 is integrally provided with a partition insertion portion 60 that protrudes upward from the outer peripheral end of the bottom wall portion 58, and a base press-fit portion 62 that protrudes upward from the outer peripheral end of the partition insertion portion 60. The base press-fit portion 62 is thinner than the partition insertion portion 60, and preferably has a radial thickness dimension that is half or less than that of the partition insertion portion 60.

[0040] A through hole 63 that penetrates in the up-down direction is formed in the bottom wall portion 58. By forming this through hole 63, the bottom wall portion 58 is formed into an inner flange shape that protrudes inwardly at the lower end of the peripheral wall portion 56.

[0041] 7, the press-fit tubular portion 42 of the second mounting member 24 in the vibration-isolating base 18 is axially inserted into the base press-fit portion 62 of the peripheral wall portion 56 of the cup member 20. Then, the press-fit rubber 50 of the rubber layer 46 is compressed between the outer peripheral surface of the press-fit tubular portion 42 of the second mounting member 24 and the inner peripheral surface of the base press-fit portion 62 of the cup member 20. In this manner, the second mounting member 24 and the cup member 20 are positioned relative to each other, with the press-fit tubular portion 42 of the second mounting member 24 being rubber press-fitted into the base press-fit portion 62 of the cup member 20 via the press-fit rubber 50.

[0042] The gap between the press-fit tube portion 42 of the second mounting member 24 and the peripheral wall portion 56 of the cup member 20 is liquid-tightly sealed by the seal rubber 52 and the press-fit rubber 50, which are part of the rubber layer 46. That is, the seal rubber 52 covering the lower surface, which is the insertion tip surface of the second mounting member 24 into the cup member 20, is compressed between the upper and lower opposing surfaces of the lower surface of the press-fit tube portion 42 of the second mounting member 24 and the upper surface of the partition insertion portion 60 of the cup member 20, thereby liquid-tightly sealing between the upper and lower opposing surfaces of the press-fit tube portion 42 and the partition insertion portion 60. The press-fit rubber 50 is compressed between the radially opposing surfaces of the outer circumferential surface of the press-fit tube portion 42 and the inner circumferential surface of the base press-fit portion 62, thereby liquid-tightly sealing between the radially opposing surfaces of the press-fit tube portion 42 and the base press-fit portion 62.

[0043] A partition member 64 and a flexible film 66 are disposed between the vibration-isolating base 18 and cup member 20 thus assembled, thereby forming the mount body 12. As shown in Figures 3 and 4, the partition member 64 is shaped as a whole in a generally rectangular plate shape with rounded corners, and has a structure in which a cover metal fitting 70 is superimposed on and fixed to the upper surface of a partition member main body 68.

[0044] The partition member main body 68 is generally in the form of a thick plate, and a circumferential groove 72 is formed around the outer periphery of the partition member 68, extending in the circumferential direction and opening on the upper surface. The circumferential groove 72 extends in the circumferential direction for a length less than one revolution, and as shown in FIG. 4, a lower communication port 74 is formed at one circumferential end portion thereof, penetrating the bottom wall portion. In addition, a storage recess 76 opening on the upper surface and a lightening recess 78 opening on the lower surface are formed on the inner circumferential side of the partition member main body 68 from the circumferential groove 72. A columnar central insertion portion 80 protruding upward from the bottom wall is provided at the center of the storage recess 76. A plurality of lower through holes (not shown) penetrating in the vertical direction are formed in the bottom wall of the storage recess 76.

[0045] A movable membrane 84 is accommodated in the accommodation recess 76. The movable membrane 84 is formed of a rubber elastic body, and has a generally rounded rectangular plate shape corresponding to the accommodation recess 76. An insertion hole 86 penetrating in the vertical direction is formed in the central part of the movable membrane 84, and when accommodated in the accommodation recess 76, the central insertion part 80 of the partition member main body 68 is inserted into the insertion hole 86, thereby positioning the movable membrane 84 within the accommodation recess 76. The movable membrane 84 has a thick outer circumferential end and a periphery of the insertion hole 86, and a thinner radial middle part.

[0046] A lid fitting 70 is superimposed on the upper surface of the partition member main body 68. The lid fitting 70 is in the form of a flat plate with rounded rectangular corners corresponding to the partition member main body 68 when viewed in the vertical direction, and is made of a metal such as an aluminum alloy or stainless steel. The lid fitting 70 has an upper communication port 88 that penetrates the outer circumferential end in the vertical direction as shown in Figures 3 and 7, and also has a plurality of upper through holes 90 that penetrate the inner circumferential portion in the vertical direction as shown in Figure 5.

[0047] As shown in Fig. 7, the cover fitting 70 is fixed to the partition member main body 68 in a state where it is superimposed on the upper surface of the partition member main body 68, and the partition member 64 is constituted by the partition member main body 68, the movable membrane 84, and the cover fitting 70. By superimposing the cover fitting 70 on the partition member main body 68, the upper opening of the circumferential groove 72 is covered by the cover fitting 70 to form a tunnel-like passage. In addition, the upper opening of the accommodation recess 76 is covered by the cover fitting 70 to form a void, and the movable membrane 84 is accommodated in this void. The thick-walled inner and outer circumferential ends of the movable membrane 84 are compressed in the vertical direction between the bottom wall of the accommodation recess 76 in the partition member main body 68 and the cover fitting 70, and the upper surface of the thin-walled radially middle portion is spaced downward from the cover fitting 70.

[0048] The partition member 64 has an upper portion inserted into the press-fit tubular portion 42 of the second mounting member 24 of the vibration-isolating base 18, and a lower portion inserted into the partition insertion portion 60 of the cup member 20, and is disposed so as to spread in the vertically orthogonal direction between the vibration-isolating base 18 and the cup member 20. In this embodiment, the outer circumferential surface of the partition member main body 68 is fitted into the press-fit tubular portion 42 of the second mounting member 24 via the inner circumferential rubber 48, and is also fitted into the partition insertion portion 60 of the cup member 20, thereby positioning the partition member 64 with respect to the vibration-isolating base 18 and the cup member 20. Note that, as shown in an enlarged view in FIG. 7, in the stand-alone state of the mount body 12 before the outer bracket 16 is attached, the outer circumferential end of the cover metal fitting 70 is spaced downward from the portion of the inner circumferential rubber 48 that covers the underside of the fixing portion 40.

[0049] A flexible film 66 is disposed below the partition member 64. The flexible film 66 is formed of rubber or resin elastomer, has a thin dome shape, and has flexibility that allows deformation in the thickness direction. A relatively thick annular holding portion 92 is provided at the outer peripheral end of the flexible film 66. The holding portion 92 is sandwiched in the vertical direction over the entire circumference between the partition member main body 68 and the bottom wall portion 58 of the cup member 20, so that the flexible film 66 is disposed so as to cover the lower part of the partition member 64. The thin inner peripheral portion of the flexible film 66 is exposed downward through the through hole 63 of the bottom wall portion 58 of the cup member 20, and the through hole 63 allows deformation such as downward bulging.

[0050] Between the vibration-isolating base 18 and the partition member 64, a pressure-receiving chamber 94 is formed as a fluid chamber, the wall of which is partly formed by the main rubber elastic body 26, and in which internal pressure fluctuations are induced when vibration is input. Between the partition member 64 and the flexible membrane 66, a balance chamber 96 is formed as a fluid chamber, the wall of which is partly formed by the flexible membrane 66, and in which volume change is permitted. The pressure-receiving chamber 94 and the balance chamber 96 are filled with an incompressible fluid, such as water, ethylene glycol, alkylene glycol, silicone oil, or a mixture thereof. In the mount body 12, the gap between the vibration-isolating base 18 and the cup member 20 is sealed by the rubber layer 46 including the seal rubber 52, and the gap between the cup member 20 and the partition member 64 is sealed by the holding portion 92 of the flexible membrane 66, preventing leakage of the incompressible fluid filled inside.

[0051] The circumferential groove 72 of the partition member 64 communicates with the pressure-receiving chamber 94 through the upper communication port 88 and with the equilibrium chamber 96 through the lower communication port 74, and an orifice passage 98 that communicates between the pressure-receiving chamber 94 and the equilibrium chamber 96 is formed by the circumferential groove 72 and the upper and lower communication ports 88, 74. The tuning frequency of the orifice passage 98, which is the resonant frequency of the flowing fluid, is set to the frequency of the vibration to be damped, and is tuned to the frequency of low-frequency vibration such as engine shake, for example.

[0052] The movable membrane 84 of the partition member 64 has an upper surface to which the fluid pressure in the pressure-receiving chamber 94 is applied through the upper through hole 90, and a lower surface to which the fluid pressure in the equilibrium chamber 96 is applied through a lower through hole (not shown). When the relative pressure between the pressure-receiving chamber 94 and the equilibrium chamber 96 fluctuates, the radial middle portion of the movable membrane 84 deforms in the vertical direction, which is the thickness direction, thereby performing the function of transmitting fluid pressure between the pressure-receiving chamber 94 and the equilibrium chamber 96.

[0053] As shown in Figs. 1 to 5 and Figs. 16 and 17, an inner bracket 14 and an outer bracket 16 are attached to the mount body 12. The inner bracket 14 is formed as a thick plate extending in the left-right direction as a whole, and in this embodiment, the right end portion is the portion attached to the first attachment member 22, and the left end portion is the portion attached to the power unit of the vehicle. The right end portion of the inner bracket 14 in this embodiment is fixed to the first attachment member 22 by a bolt 104 screwed into the screw hole 28. The left end portion of the inner bracket 14 attached to the power unit is wider in the front-rear direction than the right end portion, and a plurality of first fastening holes 106 are formed penetrating the inner bracket 14 in the up-down direction. The inner bracket 14 is desirably formed of a metal such as iron, and is a highly rigid member.

[0054] The outer bracket 16 is provided with a mount receiving space 108 into which the mount body 12 is inserted and assembled. The mount receiving space 108 is recessed and opens to the right, and has a pair of fitting grooves 110, 110 opening on the inner wall surface on both the front and rear sides. As shown in FIG. 16, the fitting groove 110 extends linearly in the left-right direction, and in this embodiment, the vertical dimension increases toward the right. The fitting groove 110 reaches the right end of the outer bracket 16 and opens toward the right, but does not reach the left end. To the left of the fitting groove 110, a back wall portion 112 is provided that crosses the left-right direction and expands. A pin insertion hole 114 corresponding to the crimping pin 34 of the second mounting member 24 is formed penetrating the back wall portion 112 in the left-right direction. In this embodiment, the pin insertion hole 114 has a substantially constant diameter on the right side and a larger diameter on the left side toward the left, and the inner surface of the left side is a tapered surface. The pin insertion hole 114 has a diameter slightly larger than that of the crimping pin 34 over its entire length in the left-right direction.

[0055] As shown in Fig. 4, a window 115 is formed in the left wall of the mount accommodating cavity 108 in the outer bracket 16, penetrating the upper part in the left-right direction. The outer bracket 16 is provided with a pair of mounting pieces 116, 116 that protrude toward both the front and rear at the lower end. Each mounting piece 116 is formed with a second fastening hole 117 that penetrates in the vertical direction, as shown in Figs. 1 and 3. As shown in Figs. 3 and 4, an open hole 118 is formed in the lower wall of the mount accommodating cavity 108 in the outer bracket 16, penetrating in the vertical direction, and the open hole 118 allows downward deformation of the flexible membrane 66.

[0056] The outer bracket 16 is attached to the second mounting member 24 side of the mount body 12 by inserting the mount body 12 into the mount accommodating cavity 108 from the right. That is, as shown in Figures 16 and 17, the front and rear fitting portions 32, 32 of the second mounting member 24 are fitted into the front and rear fitting grooves 110, 110 of the mount accommodating cavity 108 of the outer bracket 16, and the lower surface of the cup member 20 connected to the second mounting member 24 is placed on the upper surface of the lower wall of the mount accommodating cavity 108, thereby attaching the outer bracket 16 to the second mounting member 24 side of the mount body 12 from the lateral direction (left side). When the outer bracket 16 is attached to the mount body 12, the vibration-isolating base 18 and the cup member 20 are positioned relative to each other by the outer bracket 16.

[0057] As shown in Figs. 18A to 18C, the mount main body 12 is inserted into the mount receiving space 108 of the outer bracket 16 from the right. As a result, first, as shown in Fig. 18A, the fitting portion 32 of the second mounting member 24 is inserted with a gap at the left side of the fitting rubber 54 into the right end portion of the fitting groove 110, which has a larger vertical width dimension. The distance between the groove bottom surfaces 120, 120 of the fitting grooves 110, 110 in the front-rear direction is larger than the front-rear width dimension at the portion where the fitting portions 32, 32 of the second mounting member 24 are provided, and the fitting portions 32, 32 of the second mounting member 24 are inserted into the fitting grooves 110, 110 with gaps on both sides in the front-rear direction. This makes it easy to insert the fitting portion 32 into the fitting groove 110.

[0058] Next, when the mount main body 12 is further moved leftward relative to the outer bracket 16 from the state shown in Fig. 18A, the fitting portion 32 is fitted into the fitting groove 110 via the fitting rubber 54, as shown in Fig. 18B. That is, the vertical width dimension of the fitting rubber 54 is made larger than the vertical width dimension of the fitting groove 110, and when the mount main body 12 is further moved leftward relative to the outer bracket 16, the fitting rubber 54 is compressed in the vertical direction between the fitting portion 32 and the groove side surfaces 122, 122 on both the upper and lower sides of the fitting groove 110. As a result, the fitting portion 32 is fitted (rubber press-fit) between the groove side surfaces 122, 122 of the fitting groove 110 via the press-fit rubber 50. The front-to-rear width dimension between the front-to-rear outer surfaces of the fitting rubbers 54, 54 fixed to a pair of fitting portions 32, 32 is made larger than the distance between the opposing surfaces of the groove bottom surfaces 120, 120 of a pair of fitting grooves 110, 110 in the front-to-rear direction, and the fitting portion 32 is fitted into the fitting groove 110 via the fitting rubber 54 also in the front-to-rear direction.

[0059] When the mount body 12 is further moved leftward relative to the outer bracket 16 from the state shown in FIG. 18B, the fitting rubber 54 is further compressed, and the outer bracket 16 is attached in a state where it is positioned relative to the mount body 12, as shown in FIG. 18C. The fitting portion 32 has a smaller vertical dimension than the fitting groove 110, and is not directly sandwiched between the upper and lower inner surfaces of the fitting groove 110 even in the state where the outer bracket 16 is completely attached as shown in FIG. 18C. The upper and lower inner surfaces of the fitting groove 110 and the upper and lower inner surfaces of the fitting portion 32 are indirectly in contact with each other via the fitting rubber 54 fixed to the surface of the fitting portion 32. The front and rear outer surfaces of the fitting portion 32 are separated from the front and rear groove inner surfaces (groove bottom surface 120) of the fitting groove 110 toward the front and rear inner sides, and are indirectly in contact with the groove bottom surface 120 of the fitting groove 110 via the fitting rubber 54. In short, the fitting portion 32 is fitted into the fitting groove 110 via the fitting rubber 54 in a rubber press-fit state.

[0060] Here, in the state where the outer bracket 16 is attached to the mount body 12 shown in Fig. 18C, the upper press-in protrusion 36 and the lower press-in protrusion 38 provided at the right end of the fitting portion 32 are press-fitted between the groove side surfaces 122, 122 on both the upper and lower sides of the fitting groove 110. That is, as shown in Fig. 18B, the vertical distance D between the upper surface of the upper press-in protrusion 36 and the lower surface of the lower press-in protrusion 38 is made larger than the vertical groove width dimension W at the right end of the fitting groove 110, and by pressing the upper and lower press-in protrusions 36, 38 into the fitting groove 110, the upper and lower press-in protrusions 36, 38 are fitted between the groove side surfaces 122, 122 of the fitting groove 110, and the fitting portion 32 is press-fitted into the fitting groove 110 at the right end where the upper and lower press-in protrusions 36, 38 are provided. Furthermore, by pressing the fitting portion 32 into the fitting groove 110 at the formation portion of the upper and lower press-in protrusions 36, 38, a positioning structure is formed which positions the fitting portion 32 of the second mounting member 24 and the outer bracket 16 having the fitting groove 110 relative to each other, and in particular prevents the mount body 12 from shifting to the right relative to the outer bracket 16 and falling off.

[0061] The upper and lower press-fitting protrusions 36, 38 are provided at the right end, which is the rear end of the fitting, in the left-right direction, which is the fitting direction of the fitting portion 32 into the fitting groove 110. Therefore, the portion of the fitting portion 32 to the left of the upper and lower press-fitting protrusions 36, 38 can be easily inserted into the fitting groove 110. Also, the fitting portion 32 indirectly abuts against the inner surface of the fitting groove 110 via the fitting rubber 54, and the upper and lower press-fitting protrusions 36, 38 are press-fitted into the fitting groove 110 in a state in which the fitting portion 32 is positioned to a certain extent relative to the outer bracket 16, making the press-fitting operation easy.

[0062] The upper and lower press-fitting protrusions 36, 38 are provided partially and not continuously over the entire length of the fitting portion 32 in the front-to-rear width direction. This allows the press-fitting and fixing force of the upper and lower press-fitting protrusions 36, 38 into the fitting groove 110 to be adjusted with a large degree of freedom, and sufficient pull-out resistance can be obtained while suppressing the force required for press-fitting.

[0063] The upper and lower press-fitting protrusions 36, 38 are provided biased toward the front-rear outer side from the front-rear center of the fitting portion 32. As a result, when the fitting portion 32 is inserted into the fitting groove 110 that opens toward the front-rear inner side, the upper and lower press-fitting protrusions 36, 38 are more reliably press-fit and fixed into the fitting groove 110 without coming off the pair of groove side surfaces 122, 122 of the fitting groove 110 toward the front-rear inner side.

[0064] The fitting portion 32 is in direct contact with the pair of groove side surfaces 122, 122 of the fitting groove 110 in the up-down direction at the upper and lower press-fitting protrusions 36, 38, and is separated inwardly in the front-rear direction without directly contacting the groove bottom surface 120 of the fitting groove 110 in the front-rear direction. Therefore, the fitting portion 32 can be inserted into the fitting groove 110 with less force. In addition, since the dimension between the front-rear outer surfaces of the pair of fitting portions 32, 32 is larger than the dimension of each fitting portion 32 in the up-down direction, which tends to result in larger dimensional errors, by separating the front-rear outer surfaces of the fitting portion 32 from the groove bottom surface 120 of the fitting groove 110 in the front-rear direction, poor assembly of the mount body 12 and the outer bracket 16 is easily avoided.

[0065] The upper and lower press-fitting protrusions 36, 38 are provided at approximately the same positions relative to each other in the left-right and front-rear directions, protrude in opposite directions relative to each other in the up-down direction, and abut against each one of a pair of groove side surfaces 122, 122 of the fitting groove 110. Therefore, when the upper and lower press-fitting protrusions 36, 38 are press-fitted into the fitting groove 110, the press-fitting reaction forces acting on the fitting portion 32 (the upper and lower press-fitting protrusions 36, 38) are offset, preventing tilting of the fitting portion 32, etc.

[0066] 18C in which the outer bracket 16 is attached to the mount main body 12, the crimping pin 34 protruding from the left end surface of the fitting portion 32 is inserted into a pin insertion hole 114 formed in the back wall portion 112 of the fitting groove 110. A compressive force in the axial direction (left-right direction) is applied to the crimping pin 34 inserted into the pin insertion hole 114 by a press or the like, and the tip portion of the crimping pin 34 is crushed, causing the tip portion of the crimping pin 34 to expand in diameter and be fixed by crimping to the inner circumferential surface of the opening portion of the pin insertion hole 114. This forms a slip-out prevention structure that limits the displacement of the fitting portion 32 to the right relative to the outer bracket 16, preventing separation of the mount main body 12 and the outer bracket 16.

[0067] When an axial compressive force is applied to the crimp pin 34 from left to right, the fitting portion 32 including the crimp pin 34 is press-fitted and fixed into the fitting groove 110 of the outer bracket 16 at the upper and lower press-fit protrusions 36, 38, and the second mounting member 24 and the outer bracket 16 are positioned relative to each other by the positioning structure provided by the upper and lower press-fit protrusions 36, 38. As a result, the reaction force against the rightward pressing force applied to the tip surface of the crimp pin 34 is sufficiently exerted by the press-fit fixing force resulting from frictional forces and the like acting between the upper and lower press-fit protrusions 36, 38 and the upper and lower groove inner surfaces of the fitting groove 110, preventing the mount body 12 from shifting to the right relative to the outer bracket 16 when the crimp pin 34 is crushed. Therefore, when crimping and fixing the second mounting member 24 and the outer bracket 16 using the crimp pin 34, there is no need to apply a leftward force to the mount body 12 to resist the rightward pressing force applied to the crimp pin 34. Crimping and fixing using the crimp pin 34 can be achieved, for example, by using a press machine with a simple mechanism that applies force in only one direction.

[0068] When the outer bracket 16 is attached to the mount body 12, the inner bracket 14 fixed to the first mounting member 22 has a left end, which is the mounting part to the power unit, protruding to the left of the outer bracket 16 through the window portion 115 of the outer bracket 16, as shown in Figure 4.

[0069] 3 and 4, by mounting the outer bracket 16 to the mount body 12, the vibration-isolating base 18 and the cup member 20 are closer to each other in the vertical direction than when the mount body 12 is alone. As a result, the press-fit cylindrical portion 42 of the second mounting member 24 and the upper surface of the partition insertion portion 60 of the cup member 20 are closer to each other, and the seal rubber 52 is compressed more greatly between the press-fit cylindrical portion 42 and the upper surface of the partition insertion portion 60, thereby improving the sealing performance of the seal rubber 52 between the second mounting member 24 and the cup member 20.

[0070] 4, by attaching the outer bracket 16 to the mount body 12, the inner circumferential rubber 48 covering the underside of the fixing portion 40 of the second mounting member 24 is pressed liquid-tight against the upper surface of the partition member 64, preventing a short circuit between the pressure-receiving chamber 94 and the equilibrium chamber 96 through the outer circumferential side of the partition member 64. By pressing the fixing portion 40 against the partition member 64 via the inner circumferential rubber 48, the retaining portion 92 of the flexible membrane 66 is more firmly sandwiched between the underside of the partition member 64 and the bottom wall portion 58 of the cup member 20, thereby improving the sealing performance of the retaining portion 92.

[0071] As described above, the mount body 12 alone, without the outer bracket 16 attached, is in a temporary sealed state in which the sealing performance is sufficient to prevent incompressible fluid from leaking to the outside. By attaching the outer bracket 16 to the mount body 12, the sealing performance is improved and a full sealed state is achieved in which short circuits between the pressure-receiving chamber 94 and the equilibrium chamber 96 are also prevented.

[0072] The engine mount 10 is mounted on a vehicle and used by attaching the first mounting member 22 to the power unit side via the inner bracket 14 and attaching the second mounting member 24 to the vehicle body side via the outer bracket 16. When vertical vibration is input between the first mounting member 22 and the second mounting member 24, a vibration-damping effect based on the flow action of fluid is exerted. That is, when low-frequency vibration equivalent to engine shake is input, the relative pressure fluctuation between the pressure-receiving chamber 94 and the equilibrium chamber 96 causes a fluid flow between the two chambers 94, 96 through the orifice passage 98, and a vibration-damping effect (high damping effect) based on the flow action of fluid is exerted. When medium- to high-frequency vibration such as idling vibration or booming noise is input, the hydraulic pressure is transmitted between the two chambers 94, 96 due to the deformation of the movable membrane 84, and the pressure-receiving chamber 94 is prevented from becoming a high-dynamic spring due to the substantial sealing of the pressure-receiving chamber 94, and a vibration-damping effect (vibration isolation effect) due to the low-dynamic spring is exerted.

[0073] Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the specific description. For example, the press-fitting protrusion may be provided on only one of the upper surface and the lower surface of the fitting portion 32 of the second mounting member 24. The press-fitting protrusion may be formed so as to protrude outwardly in the front-rear direction from the fitting portion 32 toward the groove bottom surface 120 of the fitting groove 110. In this case, it is desirable that the second mounting member 24 is press-fitted into the outer bracket 16 between the groove bottom surfaces 120, 120 of the fitting grooves 110, 110 at the portion where the press-fitting protrusion is formed.

[0074] A plurality of press-fitting protrusions may be provided in the front-rear direction of the fitting portion 32. In addition, it is preferable that the press-fitting protrusions are provided partially in the front-rear direction of the fitting portion 32, but for example, they may be provided continuously over the entire front-rear length of the fitting portion 32. In addition, the specific shape of the press-fitting protrusions is not limited to the shape exemplified in the first embodiment, and for example, a hemispherical shape or the like may be adopted.

[0075] The press-fitting protrusion is provided at the rear end portion of the fitting portion 32 in the direction in which the rubber is pressed into the fitting groove 110 so that it is pressed into the fitting groove 110 immediately before the rubber is completely pressed into the fitting groove 110 of the fitting portion 32, but it does not necessarily have to be located at the rear end of the fitting portion 32. In short, the right end face of the press-fitting protrusion 36 (38) in the first embodiment may be located to the left of the right end face of the fitting portion 32.

[0076] In the first embodiment described above, when the mount body 12 is in a standalone state in which the vibration-proof base 18 and the cup member 20 are connected, it is in a temporary sealed state that is sufficient to prevent liquid leakage to the outside, and when the outer bracket 16 is attached to the mount body 12, it becomes in a fully sealed state when in use. However, for example, the amount of compressive deformation of the sealing rubber 52, etc. can also be set so that the fully sealed state is achieved when the mount body 12 is in a standalone state.

[0077] The second mounting member 24 and the cup member 20 are not necessarily limited to a rectangular shape with rounded corners when viewed in the vertical direction, and may be, for example, a circular or elliptical shape when viewed in the vertical direction.

[0078] In the first embodiment, the engine mount 10 is a fluid-filled type vibration damping device having a fluid chamber therein, but the present invention can also be applied to, for example, a solid-type vibration damping device that does not have a fluid chamber. [Explanation of symbols]

[0079] 10 Engine mount (first embodiment, vibration isolation device) 12 Mount body 14 Inner bracket 16 Outer bracket (bracket) 18 Anti-vibration base 20 Cup member 22 First mounting member 24 Second mounting member 26 Main rubber elastic body 28 screw holes 30 Flange-shaped part 32 Fitting part 34 Crimping pin 36 Upper press-fit protrusion (press-fit protrusion) 38 Lower press-in protrusion (press-in protrusion) 40 Fixing part 42 Press-fitting cylinder 44 Recess 46 Rubber layer 48 Inner rubber 50 Press-fit rubber 52 Seal rubber 54 Rubber Fitting 56 Peripheral wall section 58 Bottom wall 60 Partition insert 62 Base press-fit part 63 Through hole 64 Partitioning material 66 Flexible membrane 68 Partition member body 70 Lid fittings 72 Circumferential groove 74 Lower communication port 76 Storage Recess 78 Hollow recess 80 Central insertion part 84 Movable Membrane 86 Insertion hole 88 Upper communication port 90 Upper hole 92 Holding part 94 Pressure receiving chamber (fluid chamber) 96 Equilibrium chamber (fluid chamber) 98 Orifice Passage 104 Volts 106 First fastening hole 108 Mount Containment Void 110 Fitting groove 112 Back wall 114 Pin insertion hole 115 Window 116 Mounting piece 117 Second fastening hole 118 Open hole 120 Groove bottom surface 122 Groove side

Claims

1. In a vibration-proof device in which a first mounting member and a second mounting member are elastically connected by a main rubber elastic body, and fitting portions provided on both sides in the width direction of the second mounting member are inserted into fitting grooves opening on opposing inner surfaces on both sides in the width direction of the bracket, thereby assembling the bracket to the second mounting member from the side, The fitting portion extends in the lateral direction in which the fitting portion is inserted into the fitting groove, a rubber fitting is fixed to a middle portion of the fitting portion in the lateral direction, and the middle portion of the fitting portion is rubber-pressed into the fitting groove via the rubber fitting, The fitting portion is provided with a crimping pin protruding laterally from a tip end surface thereof, and a pin insertion hole is formed through a back wall portion of the fitting groove opposite the tip end surface of the fitting portion, and the crimping pin is inserted into the pin insertion hole by pressing a rubber into the fitting groove of the fitting portion, a press-in protrusion protruding toward the inner surface of the fitting groove is integrally formed at a rear end portion of the fitting portion, and the portion of the fitting portion where the press-in protrusion is formed is press-fitted and fixed into the fitting groove by pressing a rubber of the fitting portion into the fitting groove, thereby forming a positioning structure which positions the second mounting member and the bracket relative to each other; This vibration-proof device has a pull-out prevention structure that prevents the second mounting member from coming off the bracket by crimping and fixing the crimping pin into the pin insertion hole while the second mounting member and the bracket are positioned relative to each other by the positioning structure.

2. The vibration-isolating device according to claim 1 , wherein the press-fitting protrusion is provided partially in the width direction of the fitting portion.

3. 3. The vibration-proof device according to claim 1, wherein the press-fitting protrusion is provided so as to protrude from the fitting portion in a direction in which the pair of groove side surfaces of the fitting groove face each other.

4. 4. The vibration-proof device according to claim 3, wherein the press-fitting protrusions are provided so as to protrude from the fitting portion toward both sides of a pair of groove side surfaces of the fitting groove in an opposing direction.

5. 5. The vibration isolation device according to claim 4, wherein the pair of press-fit projections projecting on both sides from the fitting portion are provided at positions facing each other.

6. 4. The vibration-isolating device according to claim 3, wherein the fitting portion and a bottom surface of the fitting groove are spaced apart from each other in the width direction.

7. The press-fitting protrusion is provided partially in the fitting portion in the width direction, 4. The vibration isolating device according to claim 3, wherein the press-fitting projection is provided offset outwardly of the fitting portion in the width direction.

Images