JP2008144921A - Engine mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine mount with fewer components required in comparison with a conventional engine mount, also with fewer manufacturing processes by omitting and reducing the number of process for adhesion processing, thereby reducing required costs. <P>SOLUTION: The engine mount 10 has an inner member 12, an outer member 14, and a rubber elastic body 16. An outer wall part 48 forming a force-in chamber 56 in an inner side is provided on the outer member 14, and it is divided into a first divided body 14-1 and a second divided body 14-2 in a portion of the outer wall part 48. Assembly of the engine mount 10 is carried out with the rubber elastic body 16 pre-compressed in an axial direction and a widening direction perpendicular to the axis, and forced into the force-in chamber 56. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an engine mount for supporting vibration isolation of an engine based on elastic deformation of a rubber elastic body.

Conventionally, an engine mount shown in FIGS. 12 and 13 is used as an engine mount for supporting vibration isolation of an automobile engine based on elastic deformation of a rubber elastic body.
In these drawings, reference numeral 200 denotes an engine mount, which is an upper mounting bracket 202 that is mounted and fixed on the engine side, a lower mounting bracket 204 that is mounted and fixed on the vehicle body side, and a rubber elasticity that is interposed between the two. And a body 206.

The upper mounting bracket 202 has a plate bracket 207 and a fastening bolt 208 fixed thereto, and is fastened to the engine side by the fastening bolt 208.
On the other hand, the lower mounting bracket 204 is entirely composed of a plate-shaped bracket, and has a pair of tongue-shaped fixing portions 210 as shown in FIG. 12B, each of which is provided with a fixing hole 212. The fixing holes 212 are attached and fixed to the vehicle body side.

The rubber elastic body 206 is fixed to the upper mounting bracket 202 and the lower mounting bracket 204 by vulcanization adhesion.
The rubber elastic body 206 has a block-shaped support rubber portion 214 as a main rubber portion that receives and supports the engine load and elastically supports the load, and a pair of stopper rubber portions 216 and 218.
In the figure, reference numerals 216A and 218A denote bounce-side rubber portions that perform a stopper action at the time of bouncing, and 216B denotes a rebound-side rubber portion that performs a stopper action at the time of rebound.

The lower mounting bracket 204 integrally includes a pair of arms 220 and 222 extending in opposite directions, and stopper rubber portions 216 and 218 are integrally fixed to the arms 220 and 222 by vulcanization bonding. ing.
The support rubber portion 214 and the stopper rubber portions 216 and 218 are continuous via a rubber film and are connected to each other.

Reference numeral 224 denotes a stopper fitting having a reverse cup shape, and has a through-hole fitting hole 226, and the fitting hole 226 is fitted into the fastening bolt 208 and assembled to the upper mounting bracket 202.
The stopper fitting 224 has a peripheral wall portion that surrounds the rubber elastic body 206, and part of the stopper fitting 224 serves as stopper portions 228 and 230 that face the stopper rubber portions 216 and 218.
FIGS. 12 and 13A show the engine mount 200 in a state before being attached to the vehicle, and FIG. 13B shows a state in which the engine load 200 is inclined and attached to the vehicle at an angle θ to support the engine load. It is represented by

  However, in the case of this engine mount 200, in addition to the upper mounting bracket 202 and the lower mounting bracket 204 for mounting on the engine side and the vehicle body side, a stopper bracket 224 having a reverse cup shape is required, so that the number of parts is large. In addition, a process for assembling the stopper fitting 224 is also required.

Further, in the engine mount 200, an adhesion process for vulcanizing and bonding the rubber elastic body 206 to the upper mounting bracket 202 and the lower mounting bracket 204 is also necessary.
In this bonding process, the upper mounting bracket 202 and the lower mounting bracket 204 are each degreased and washed in advance and dried, and then an adhesive coating process and a subsequent drying process are required. Usually, a plurality of types of adhesives are used. Each time an adhesive is applied, a drying process after the application is required, which is a troublesome process requiring many steps.

  And since the process for assembling the stopper fitting 224 and the process of applying the adhesive are required, the total man-hour for manufacturing the engine mount 200 is increased, which reduces the cost of the engine mount 200. It was a factor that pushed it up.

  Further, in this engine mount 200, the vulcanized product composed of the upper mounting bracket 202, the lower mounting bracket 204 and the rubber elastic body 206 is large-sized, and the number of the molds to be taken by one molding inevitably becomes necessary. This has also reduced the cost of the engine mount 200.

In addition, there exist some which were disclosed by following patent document 1 and patent document 2 as prior art with respect to this invention.
These are related to a cylindrical mount used as an engine mount. A rubber elastic body is vulcanized integrally with an inner member in advance to form a preliminary assembly, and the rubber elastic body is attached to a mounting member. The outer member having a divided structure configured as described above, that is, a rubber elastic body is sandwiched between a pair of divided bodies to form a mount assembly, but the configuration is different from that of the present invention.

JP 2005-163976 A JP-A-6-264968

  The present invention is based on the above circumstances, the number of required parts can be reduced compared to conventional engine mounts, and the number of man-hours for bonding treatment can be omitted or reduced, and the total number of manufacturing steps can be reduced. The object of the present invention is to provide an engine mount that can increase the number of moldings per mold during vulcanization of a rubber elastic body and can effectively reduce the cost as a whole.

  Thus, the present invention comprises a rigid inner member as an attachment member to one of the engine side or the vehicle body side, a rigid outer member as an attachment member to the other, and the inner member and the outer member. An engine mount having a rubber elastic body interposed between connected states, wherein the rubber elastic body is a support rubber leg that supports an engine load and a rebound side that controls relative displacement of the inner member when rebounding. The rubber part is fixed to the inner member at the time of vulcanization in a state in which the rubber parts protrude in opposite directions in the axial direction of the supporting rubber leg, and forms a pre-assembled body together with the inner member. , Having an outer wall portion that forms the pushing chamber of the rubber elastic body inside, and is divided into a first divided body and a second divided body at the outer wall portion, and the first divided body and the second divided body. Min The rebound-side rubber portion and the support rubber leg in the rubber elastic body are sandwiched in the axial direction with the body, and the rubber elastic body is pushed into the push-in chamber in the first divided body and the second divided body, respectively. A portion that is fastened and fixed by a fixed portion provided, and that the push-in chamber has a small axial dimension relative to the rubber elastic body in a free form, and corresponds to a tip portion of the support rubber leg The dimension perpendicular to the axis is larger than the dimension perpendicular to the axis of the tip of the support rubber leg when free-form, and the outer wall is supported by the pinching of the rubber elastic body in the axis. The rubber elasticity is applied in a state in which the support rubber leg is expanded and deformed in the direction perpendicular to the axis along with the movement of the tip of the rubber leg, and the support rubber leg is pre-compressed in both the axial direction and the expansion direction. Push the body into the push-in chamber An axial direction in which the outer wall portion is abutted in the axial direction against the distal end surface of the support rubber leg in a state where the pressing is completed, and the support rubber leg is pre-compressed and restrained in the axial direction. The corner portion includes a restraint portion and an axially restraint portion that abuts the restraint portion and the outer surface of the tip end portion of the support rubber leg in the spreading direction so as to pre-compress and restrain the spread direction. A guide surface is provided that abuts the front end surface of the support rubber leg in the axial direction when being pushed in, and expands and guides the support rubber leg with the movement of the position of the front end portion of the support rubber leg. .

  According to a second aspect of the present invention, in the first aspect, the push-in chamber has the tip portion of the rebound side rubber portion when the dimension perpendicular to the axis of the portion corresponding to the tip portion of the rebound side rubber portion is a free shape. The outer wall portion is made larger than the dimension perpendicular to the axis, and the rebound-side rubber portion is moved with the position movement of the tip of the rebound-side rubber portion by sandwiching the rubber elastic body in the axial direction. The rubber elastic body is pushed into the push-in chamber in a state where the rebound-side rubber portion is pre-compressed in both the axial direction and the spreading direction in a direction perpendicular to the axis, and the outer wall portion The axial direction constraining part and the rebound side rubber part that abut against the front end surface of the rebound side rubber part in the axial direction in a state where the pushing is completed and apply pre-compression and restrain the axial direction to the rebound side rubber part A corner perpendicular portion is provided at the corner to restrain the outer side surface of the tip portion in the spreading direction so as to apply and restrain the pre-compression in the spreading direction, and the rebound side rubber portion at the time of pushing by the pinching A guide surface that abuts the tip end surface of the rebound side rubber portion in the axial direction and expands and guides the rebound side rubber portion in accordance with the movement of the position of the tip end portion of the rebound side rubber portion is provided.

  A third aspect of the present invention is characterized in that, in the first aspect, the support rubber leg has a cylindrical shape with an open end.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the support rubber leg is provided with a slit in an axial direction that assists the expansion deformation of the support rubber leg at a predetermined position in the circumferential direction.

  A fifth aspect of the present invention is characterized in that, in the second aspect, the rebound side rubber portion has a cylindrical shape with an open end.

  According to a sixth aspect of the present invention, in the second aspect, the support rubber leg and the rebound-side rubber portion have a cylindrical shape in which each distal end portion is an open shape in a free shape state, and the outer wall portion corresponds to the cylindrical shape. The rubber elastic body has a drum shape as a whole due to the expanding deformation of each of the support rubber leg and the rebound side rubber portion when the push-in is completed.

  According to a seventh aspect of the present invention, in the inner member according to the sixth aspect, the inner member is provided with an annular pressing portion having a diameter larger than the inner diameter of the supporting rubber leg and the rebound side rubber portion, and the supporting rubber of the inner member. The support rubber leg is pressed by the pressing portion by the relative movement toward the leg side, and the rebound side rubber portion is pressed by the pressing portion by the relative movement to the rebound side rubber portion side. It is characterized by being.

Effects and effects of the invention

  As described above, according to the present invention, the rubber elastic body is fixed integrally with the inner member at the time of vulcanization of the rubber elastic body to form a preliminary assembly, and the outer member that constitutes the mounting member is divided into the divided structures. The rebound-side rubber and the support rubber leg are sandwiched in the axial direction at, and the rubber elastic body is pushed into the inside of the pushing chamber formed in the outer member so as to constitute the engine mount assembly. In addition, the support rubber leg is compressed and deformed in the axial direction and expanded in the direction perpendicular to the axis, and is also compressed and deformed in the expansion direction, and the support rubber leg is preliminarily deformed in both the axial direction and the direction perpendicular to the axis in the assembled state. It is designed to give compression.

  In the engine mount of the present invention, since the outer member functions as a reverse cup-shaped stopper fitting of the conventional engine mount shown in FIGS. 12 and 13, such a stopper fitting is required separately. Therefore, the number of required parts constituting the engine mount can be reduced, and the number of man-hours for the assembly can be reduced.

Further, since the rubber elastic body and the outer member are firmly connected to each other by pressing the rubber elastic body into the pressing chamber, it is necessary to vulcanize and bond them to connect the rubber elastic body and the outer member. Therefore, the bonding process for the outer member can be omitted, and the number of processes conventionally required for the bonding process can be reduced.
Thereby, the number of manufacturing steps of the entire engine mount can be reduced, and the cost of manufacturing the engine mount can be reduced.

The rubber elastic body, more specifically, the assembly of the preliminary assembly and the outer member, is simply clamped in the axial direction between the outer member's divided bodies, and the divided bodies are fastened while being pushed into the pushing chamber. Therefore, the assembly of the preliminary assembly and the outer member can be easily performed.
Further, in the present invention, it is not necessary to fix the rubber elastic body to the outer member, and it is only necessary to fix the rubber elastic body to the inner member, so that the vulcanized product (preliminary assembly) becomes compact. It is possible to increase the number of vulcanized products per molding die during vulcanization, thereby improving productivity and contributing to the cost reduction of the engine mount.

  In the present invention, when the rubber elastic body (that is, the pre-assembled body) and the outer member are assembled, the support rubber leg is not only compressed and elastically deformed in the axial direction but also expanded and deformed in the direction perpendicular to the axis. It is characterized in that pre-compression is applied to the rubber legs in both the axial direction and the spreading direction perpendicular to the axial direction.

It may be possible to compress and elastically deform the support rubber leg only in the axial direction during assembly, but in this case, the support rubber leg is deformed in the same direction in order to better follow and deform the large relative displacement of the engine during rebound. In order to ensure a large return deformation stroke, it is necessary to preliminarily compress and elastically deform the support rubber legs in the axial direction.
However, when doing so, a large distortion occurs in the support rubber legs, which causes a decrease in durability and requires a large force for assembly.

  Also, when the support rubber legs are compressed and deformed only in the axial direction, the rubber reaction force suddenly increases from a certain point, making it difficult to secure a sufficient amount of compression (pre-compression amount). The spring stiffness in the axial direction of the rubber elastic body becomes too large.

However, in the present invention, the support rubber leg is deformed not only in the axial direction but also in the expanding direction in the direction perpendicular to the axis, and the support rubber leg is assembled in a pre-compressed state in both the axial direction and the direction perpendicular to the axis. Therefore, it is possible to avoid the occurrence of partial and excessive distortion in the support rubber leg during assembly, and the durability can be improved.
In addition, since the rubber reaction force generated on the support rubber legs during assembly can be reduced, assembly can be performed easily with a small force, and the spring rigidity of the support rubber legs does not become excessive when assembly is completed. Spring rigidity can be easily imparted.

  In addition, since the assembly can be performed with the pre-compression applied to the support rubber leg in both the axial direction and the direction perpendicular to the axis, in detail, if the support rubber leg is only in the axial direction against the relative displacement in the rebound direction of the engine, In addition, since it is possible to return and deform in the direction perpendicular to the axis, it is possible to preliminarily give the support rubber leg a sufficient amount of preliminary compression as a whole by elastically deforming the support rubber leg in both the axial direction and the direction perpendicular to the axis. Therefore, it is possible to ensure a large return deformation stroke (free length) of the support rubber leg with respect to the relative displacement in the rebound direction of the engine.

Next, the present invention provides a rubber elastic body in a state where not only the supporting rubber legs but also the rebound side rubber portion are deformed in the expanding direction in the axial direction and the direction perpendicular to the axial direction, that is, in a state in which precompression is applied in both directions. The rubber elastic body (preliminarily assembled body) and the outer member are assembled together. According to claim 2, a sufficient amount of precompression is applied to the rebound side rubber portion. As with the above support rubber legs, the rebound side rubber part does not generate excessive distortion during pre-compression and the spring rigidity of the rebound side rubber part may be excessive. Can be avoided.
Furthermore, a large deformation stroke (free length) can be given to the rebound side rubber part.

  In addition, according to the second aspect, both the support rubber leg and the rebound side rubber portion can simultaneously generate axial deformation and compressive deformation in the direction perpendicular to the axial direction at the time of assembly, and the axial direction and the axis perpendicular to the axial direction. Directional pre-compression can be provided.

According to the present invention, the support rubber leg can be formed into a cylindrical shape having an open end at the tip.
In this way, when the engine mount is attached to the vehicle with the axial direction of the support rubber legs as the vertical direction, appropriate spring rigidity can be given by the support rubber legs in both the vehicle front-rear direction and the left-right direction.
In this case, the same spring rigidity can be given in the front-rear direction and in the left-right direction if the support rubber legs have a cylindrical shape with a circular cross section.

According to a fourth aspect of the present invention, the support rubber leg may be provided with an axial slit at a predetermined position in the circumferential direction to assist the expansion deformation of the support rubber leg.
In this way, the support rubber leg can be easily expanded and deformed in the direction perpendicular to the axis with a small force, and as a result, a large deformation amount, that is, a pre-compression amount can be given in the expansion direction.

According to the present invention, the rebound-side rubber portion can be formed into a cylindrical shape having an open end at the front end.
Here, also in the rebound side rubber portion, it is possible to provide an axial slit at a predetermined position in the circumferential direction to help the rebound side rubber portion expand and deform.

  In the present invention, the support rubber leg and the rebound side rubber portion are formed in a cylindrical shape with each distal end portion being open in a free shape state, and the outer wall portion is formed in a corresponding cylindrical shape, and the support rubber in a state where the pushing is completed The rubber elastic body can be configured to have a drum shape as a whole by the spreading deformation of the leg and the rebound side rubber portion.

  In this case, the inner member is provided with an annular pressing portion that is larger in diameter than the inner diameter of the supporting rubber leg and the rebound side rubber portion, and is supported by the pressing portion by relative movement of the inner member toward the supporting rubber leg. The rubber leg can be pressed, and the rebound side rubber portion can be pressed by the pressing portion by relative movement toward the rebound side rubber portion (Claim 7).

  By providing such a pressing portion on the inner member, it is possible to satisfactorily perform the vibration-proofing action against the relative displacement in the vertical direction of the engine at the support rubber leg and the rebound side rubber portion.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes an engine mount of the present embodiment, an inner metal fitting (inner member) 12 that also serves as an attachment member to the engine side, an outer metal fitting (outer member) 14 that also serves as an attachment member to the vehicle body side, It has a rubber elastic body 16 interposed between them in a state of connecting them.

Here, the rubber elastic body 16 and the inner metal fitting 12 are integrally fixed when the rubber elastic body 16 is vulcanized, and constitute a pre-assembly 18 shown in FIG.
The inner fitting 12 is provided with a female screw hole 20 at the center, and the inner fitting 12 is fixed to the engine side by screwing a fastening bolt into the female screw hole 20.

  The rubber elastic body 16 has a generally cylindrical shape with an upper end and a lower end in an open shape in a free shape state during vulcanization shown in FIG. A rubber wall 22 extending so as to connect the cylindrical body in the direction perpendicular to the axis is provided at a position slightly above the center position in the vertical direction, which is the axial direction of the inner metal fitting 12.

  The rubber elastic body 16 has a support rubber leg 24 that elastically supports the engine load from below on the lower side of the rubber wall 22 and a rebound side rubber portion 26 that controls displacement at the time of rebound on the upper side. The support rubber leg 24 is fixed to the inner metal member 12 with the rebound-side rubber portion 26 protruding downward in the drawing and the rebound side rubber portion 26 protruding upward in the drawing. This fixing is performed when the rubber elastic body 16 is vulcanized.

The inner metal fitting 12 has a flange-shaped pressing portion 28 that protrudes in an annular shape outward in a direction perpendicular to the axis, and the pressing portion 28 is embedded in the rubber wall 22.
The pressing portion 28 is provided with connecting holes 30 penetrating vertically at a plurality of locations in the circumferential direction, and the lower rubber and the upper rubber of the pressing portion 28 are connected to each other in the connecting hole 30.
In this embodiment, the inner metal fitting 12 and the rubber elastic body 16 are not vulcanized and bonded, and the inner metal fitting 12 and the rubber elastic body 16 are fixed by the rubber connection in the connection hole 30. Accordingly, the inner metal member 12 and the rubber elastic body 16 may be vulcanized and bonded.

  The inner metal member 12 is also provided with a bounce-side stopper portion 32 that protrudes downward in the figure, and the rubber elastic body 16 has a bounce-side stopper rubber portion 34 so as to cover the stopper portion 32. Is provided.

  Here, the outer diameter of the pressing portion 28 is larger than the inner diameter of the support rubber leg 24 and the rebound-side rubber portion 26, and the outer peripheral surface thereof is positioned near the outer peripheral surface of the rubber elastic body 16 having a cylindrical shape. is doing.

The support rubber legs 24 have a cylindrical shape that is straight in the axial direction in a free shape during vulcanization.
Specifically, the support rubber leg 24 has a straight shape in which both the inner peripheral surface and the outer peripheral surface are parallel to the axial direction. Further, tapered constrained surfaces 36 and 38 whose directions are opposite to each other are formed on the inner peripheral side and the outer peripheral side of the tip (lower end).

Here, the constrained surface 36 on the inner peripheral side becomes a guided surface when the rubber elastic body 16 is assembled to the outer metal fitting 14 and the support rubber leg 24 is expanded and deformed, and the outer metal fitting 14 is in a state where the assembling is completed. The first axial direction restraint portion 60 described later comes into contact with and becomes a restrained surface.
On the other hand, the constrained surface 38 on the outer peripheral side comes into contact with a later-described first axis perpendicular direction constraining portion 62 of the outer metal fitting 14 in the assembled state of FIG.
In this embodiment, the top formed by the inner-side restrained surface 36 and the outer-side restrained surface 38 is located on the outer peripheral side with respect to the center position of the thickness of the support rubber leg 24.
In other words, the inner-side restrained surface 36 that functions as a guided surface during the expansion deformation is formed with a wider and gentler inclination angle with respect to the outer-side restrained surface 38.

As shown in FIG. 3 (B), the support rubber leg 24 has axial slits 40 at a plurality of circumferential locations (here, three locations) to assist the expansion deformation in the direction perpendicular to the axis of the support rubber leg 24. Is provided.
Here, the slit 40 has a keyhole shape, and a large diameter portion 42 having a partial circular shape is formed at an upper end portion thereof.

  On the other hand, the rebound-side rubber portion 26 has a tip-end shape in which the tip end portion (upper end portion in the drawing) slightly expands outward in the direction perpendicular to the axis, and the tip end surface (upper end surface) is described later of the outer metal fitting 14 in FIG. The second constrained surface 44 is constrained to be constrained by the second axial direction restraint portion 64, and the constrained surface 44 is perpendicular to the outer surface of the constrained surface 44. A constrained surface 46 that is in contact with and constrains 66 is formed.

As shown in FIG. 2, the outer metal fitting 14 has a cylindrical outer wall portion 48.
The outer wall portion 48 includes a peripheral wall portion 50, an upper wall portion 52, and a bottom wall portion 54, and a push chamber 56 for the rubber elastic body 16 is formed inside.
A circular opening 58 is formed in the upper wall portion 52, and the inner metal fitting 12 protrudes upward from the circular opening 58.
Here, the circular opening 58 has an inner diameter smaller than the outer diameter of the pressing portion 28 of the inner metal member 12, and the upper wall portion 52 and the pressing portion 28 are in the vertical direction in the drawing, that is, the axis of the inner metal member 12. It is overlapped in the direction.

  The outer wall portion 48 is in contact with the support rubber leg 24 in the axial direction at the lower corner portion in the drawing, and a first axial direction restraining portion 60 that restrains the support rubber leg 24 in a pre-compressed state in the axial direction, and a support rubber. A first axis perpendicular direction restraining part 62 is provided that abuts the leg 24 in the direction perpendicular to the axis and pre-compresses and restrains the tip of the support rubber leg 24 in the direction perpendicular to the axis.

  Further, a second axial direction restraining portion 64 that abuts the rebound side rubber portion 26 in the axial direction at the upper end corner portion in the drawing, pre-compresses and restrains the rebound side rubber portion 26 in the axial direction, and the rebound side rubber portion. 26, a second axis perpendicular direction restraining portion 66 that abuts in a direction perpendicular to the axis and pre-compresses and restrains the rebound side rubber portion 26 in the direction perpendicular to the axis.

When the support rubber leg 24 is assembled to the outer metal fitting 14, the constrained surface 36 on the inner peripheral side of the tip portion contacts the first axial restraint portion 60, and the constrained surface 38 on the outer peripheral side is the first. The axial perpendicular direction restraint part 62 is contacted and restrained by them in the axial direction and the axial perpendicular direction.
Further, in the assembled state, the constrained surface 44 on the upper surface of the rebound side rubber portion 26 contacts the second axial direction constraining portion 64, and the constrained surface 46 of the outer surface contacts the second axis perpendicular direction constraining portion 66, They are constrained to the axial direction and the direction perpendicular to the axial line.

The push-in chamber 56 of the rubber elastic body 16 has a vertical (axial direction) dimension smaller than the vertical dimension of the rubber elastic body 16 in a free-form state as shown in FIG. ) The dimensions are larger than the respective distal end portions of the support rubber leg 24 and the rebound side rubber portion 26.
However, the push-in chamber 56 has a diameter that allows pre-compression to be applied in the direction perpendicular to the axis after the support rubber legs 24 and the rebound side rubber portion 26 are expanded and deformed in the direction perpendicular to the axis as will be described later.

In this embodiment, the outer metal fitting 14 is a part of the outer wall portion 48 and is vertically arranged in the first divided body 14-1 and the second divided body 14-2 in the drawing, that is, in the axial direction of the rubber elastic body 16 and the inner metal fitting 12. It is divided into two.
The upper wall portion 52 and the peripheral wall portion 50 in the outer wall portion 48 are configured on the first divided body 14-1 side, and the bottom wall portion 54 is configured on the second divided body 14-2 side.

Here, as shown in FIGS. 4 and 5, the second divided body 14-2 has a flat plate shape, and the first divided body 14-1 has a hat shape as a whole.
Each of the first divided body 14-1 and the second divided body 14-2 is provided with a pair of fixing portions 68 and 70, and the fixing portions 68 and 70 are respectively provided with fixing holes 72. Are fixed to each other.
The outer metal fitting 14 is fastened and fixed to the vehicle body side with fasteners in these fixing holes 72.

In FIG. 1, reference numeral 74 denotes a guide surface for expanding and guiding the support rubber legs 24 when the rubber elastic body 16 is assembled inside the outer wall 48, and 76 indicates the rebound-side rubber portion 26 for expanding and deforming. It represents a guide surface.
In this embodiment, the guide surfaces 74 and 76 are both flat in the direction perpendicular to the axis.

Next, a procedure for assembling the engine mount 10 according to the present embodiment will be described with reference to FIGS.
In the present embodiment, the first divided body 14-1 and the second divided body 14-2 of the outer metal fitting 14 are separated in the vertical direction in FIG. 4, and the preliminary assembly 18 in FIG. Position. At this time, the rubber elastic body 16 is in a free-form state during vulcanization.

In this state, when the first divided body 14-1 and the second divided body 14-2 are moved closer to each other in the vertical direction, the tip of the support rubber leg 24 is located at the second divided body as shown in FIG. 14-2 and the tip of the rebound rubber part 26 contacts the upper wall 52 of the first divided body 14-1.
At this time, the fixing portion 68 of the first divided body 14-1 and the fixing portion 70 of the second divided body 14-2 are in a state of being separated by a certain distance in the vertical direction. This is because the vertical dimension of the pushing chamber 56 is smaller than the vertical dimension of the rubber elastic body 16 in a free shape.

In this embodiment, in this state, the rubber elastic body 16, that is, the rebound-side rubber portion 26 and the support rubber legs 24 are sandwiched in the vertical direction so that the first divided body 14-1 and the second divided body 14-2 Are superimposed on each other.
Specifically, the fixing portions 68 and 70 are overlapped with each other. The fixing portions 68 and 70 are fixed in the fixing hole 72.
At that time, the rubber elastic body 16 in the free form state shown in FIG. 3 is elastically deformed from the shape shown by the solid line in FIG. 6 to the shape shown by the two-dot chain line in the support rubber leg 24 and the rebound side rubber part 26. And it will be in the state pushed in in the pushing chamber 56. FIG.

  Specifically, when the first divided body 14-1 and the second divided body 14-2 are moved closer to each other in the vertical direction in the drawing from the state shown in FIG. 5, the support rubber legs 24 are compressed and deformed in the vertical direction. At the same time, the tip portion of the support rubber leg 24 is deformed by expanding and deforming in the radial direction (perpendicular to the axis) with the position movement of the tip portion, and the tip end portion of the support rubber leg 24 is accommodated in the corner portion of the pushing chamber 56 as shown in FIG. It becomes.

In other words, the constrained surface 36 on the inner peripheral side of the support rubber leg 24 contacts the first axial direction constraining portion 60 of the outer wall portion 50, and the constrained surface 38 on the outer peripheral side contacts the first axial perpendicular direction constraining portion 62. It will be in the state.
At this time, the support rubber legs 24 are pre-compressed in a state of being compressed and deformed in the vertical direction and the radially inward direction in the figure by the first axial direction restricting portion 60 and the first axis perpendicular direction restricting portion 62, respectively. It is restrained in the state.
When the support rubber leg 24 is expanded and deformed, the support rubber leg 24 is expanded and guided by the guide surface 74 on the second divided body 14-2 side that comes into contact with the tip end surface thereof.

  In this embodiment, the rebound-side rubber part 26 is also compressed and deformed in the vertical direction and expanded in the radial direction by being sandwiched between the first divided body 14-1 and the second divided body 14-2. In the assembled state shown, the constrained surface 44 of the rebound-side rubber part 26 contacts the second axial direction constraining part 64 of the outer wall part 48, and the constrained surface 46 of the outer surface is the second axially perpendicular constraining part. 66 is brought into contact.

The second axial direction restraint portion 64 and the second axis perpendicular direction restraint portion 66 pre-compress the rebound side rubber portion 26 in the vertical direction and the inward direction in the radial direction, and the rebound side rubber portion 26 in this state. to bound.
Even when the rebound-side rubber portion 26 is expanded and deformed, the guide surface 76 of the upper wall portion 52 of the outer wall portion 48 abuts on the constrained surface 44 at the tip of the rebound-side rubber portion 26 and is sandwiched between the rebound-side rubber portion 26. At the same time, it expands and guides deformation.

In this embodiment, the engine mount 10 is attached to the vehicle in the orientation and state shown in FIG. 1 (however, FIG. 1 shows a state where no engine load is applied), and the engine load is supported by the support rubber legs 24.
At this time, the inner metal member 12 receives the engine load from the state shown in FIG. 1 and is displaced downward in the drawing, and the support rubber leg 24 is deformed from the state shown in FIG.

  Under this condition, the support rubber leg 24 is elastically deformed with the relative vertical movement of the engine and the vehicle body, and provides a vibration-proofing action between the vehicle body and the engine based on its own elastic deformation.

At this time, the rebound-side rubber part 26 also undergoes elastic deformation, and elastically restricts the upward relative displacement of the inner member 12 relative to the outer member 14 in the drawing.
When the upward movement amount of the inner metal fitting 12 is increased, excessive upward displacement of the inner metal fitting 12 is prevented by contact between the pressing portion 28 of the inner metal fitting 12 and the upper wall portion 52 of the outer wall portion 48.

The support rubber leg 24 and the rebound side rubber portion 26 are elastically deformed in the front-rear direction and the left-right direction of the vehicle in cooperation with each other, and the front-rear direction input and the left-right direction input are performed between the vehicle body and the engine based on the elastic deformation. And absorbs vibration between the vehicle body and the engine in the same direction.
When a large input is applied in the front-rear direction and the left-right direction, the pressing portion 28 hits the peripheral wall portion 50 of the outer wall portion 48 via the rubber elastic body 16 or increases the contact area of the rubber elastic body 16 with respect to the peripheral wall portion 50. Further, the excessive displacement in the front-rear direction and the left-right direction is restricted by the increase in the repulsive force accompanying the increase in the deformation amount of the rubber elastic body 16.

  In the present embodiment as described above, since the outer metal fitting 14 functions as the stopper metal fitting 224 shown in FIGS. 12 and 13 in the related art, a required component constituting the engine mount 10 is not required separately. The number of points can be reduced, and the man-hours for the assembly can also be reduced.

Further, since the rubber elastic body 16 and the outer metal fitting 14 are firmly connected to each other by pushing the rubber elastic body 16 into the push-in chamber 56, the rubber elastic body 16 and the outer metal fitting 14 are connected to each other. Therefore, the bonding process for the outer metal fitting 14 can be omitted, and the process conventionally required for the bonding process can be reduced.
Thereby, the number of manufacturing steps of the entire engine mount can be reduced, and the cost of manufacturing the engine mount can be reduced.

  Further, the pre-assembly 18 and the outer metal fitting 14 are assembled by simply sandwiching the rubber elastic body 16 in the vertical direction between the divided bodies 14-1 and 14-2 of the outer metal fitting 14 and pushing it into the pushing chamber 56. Since it is only necessary to fasten the divided bodies 14-1 and 14-2 in the state, the assembly of the preliminary assembly 18 and the outer metal fitting 14 can be easily performed.

  Further, in this embodiment, the rubber elastic body 16 is not fixed to the outer metal fitting 14 when vulcanized, and only needs to be fixed to the inner metal fitting 12, so that the preliminary assembly 18 becomes compact, and therefore the rubber. It is possible to increase the number of vulcanized products per molding die at the time of elastic body vulcanization, thereby improving productivity and contributing to cost reduction of the engine mount 10.

Further, in the present embodiment, the support rubber legs 24 are deformed not only in the vertical direction but also in the radial expansion direction during assembly, and the support rubber legs 24 are pre-compressed in both the vertical direction and the radial direction. Since the attachment is performed, it is possible to avoid the occurrence of partial and excessive distortion in the support rubber legs 24 during the assembly, and the durability can be improved.
Further, since the rubber reaction force generated in the support rubber leg 24 at the time of assembly can be reduced, the assembly can be easily performed with a small force, and the spring rigidity of the support rubber leg 24 does not become excessive when the assembly is completed. Appropriate spring rigidity can be easily imparted.

  Further, since the assembly can be performed with the support rubber legs 24 pre-compressed in both the vertical direction and the radial direction, the support rubber legs 24 only in the vertical direction with respect to the relative displacement in the rebound direction of the engine. In addition, since it is possible to return and deform in the radial direction, the support rubber leg 24 is preliminarily given a sufficient amount of preliminary compression by elastically deforming the support rubber leg 24 in both the vertical direction and the radial direction. Therefore, it is possible to ensure a large return deformation stroke (free length) of the support rubber leg 24 with respect to the relative displacement in the rebound direction of the engine.

Further, a sufficient amount of pre-compression can be applied to the rebound-side rubber portion 26, and no excessive distortion is generated in the rebound-side rubber portion 26 during pre-compression, and the spring of the rebound-side rubber portion 26 It is also possible to avoid excessive rigidity.
Furthermore, a large deformation stroke (free length) can be given to the rebound side rubber portion 26.

  In addition, both the support rubber leg 24 and the rebound side rubber portion 26 can simultaneously generate vertical compression deformation and radial compression deformation at the time of assembling, and provide vertical compression and radial pre-compression. Can do.

  In the present embodiment, since the rubber elastic body 16 including the support rubber legs 24 and the rebound side rubber portion 26 has a cylindrical shape, an appropriate spring rigidity is provided by the rubber elastic body 16 in the vehicle front-rear direction and the left-right direction. Can be given.

  Further, since the support rubber leg 24 is provided with a vertical slit 40 that assists the deformation of the support rubber leg 24 at a predetermined position in the circumferential direction, the support rubber leg 24 is easily expanded and deformed in the radial direction with a small force. As a result, a large deformation amount, that is, a pre-compression amount can be given in the spreading direction.

  In the present embodiment, since the pressing portion 28 is provided on the inner metal member 12, the support rubber leg 24 and the rebound side rubber portion 26 can satisfactorily perform a vibration-proofing action against the relative displacement in the vertical direction of the engine. .

  In the above embodiment, the guide surface 74 that guides the expansion deformation of the support rubber leg 24 is formed as a flat surface in the direction perpendicular to the axis. However, as shown in FIGS. It is also possible to provide the guide surface 78.

In this embodiment, as shown in FIG. 7, an annular groove 80 is formed inside the corner portion of the outer wall portion 48 by the guide surface 78, and a part of the tip end portion of the support rubber leg 24 is fitted therein. It comes to fit there.
The other points are the same as in the above embodiment, and only the reference numerals are shown, and detailed description is omitted.

Next, FIGS. 9 to 11 show another embodiment of the present invention.
In this embodiment, the outer metal fitting 14 is vertically divided into a first divided body 14-1 and a second divided body 14-2 at the upper and lower central positions of the outer wall portion 48.
The first divided body 14-1 and the second divided body 14-2 are vertically symmetrical, and the upper wall portion 52 of the outer wall portion 48 and half of the peripheral wall portion 50 are the first divided body 14 on the upper side in the drawing. Further, the lower half of the peripheral wall portion 50 and the bottom wall portion 54 are formed on the lower second divided body 14-2 side in the drawing.
In this embodiment, the outer wall portion 50 is provided with a lateral opening 82 and a cylindrical portion 84 that forms the opening 82 inside.

In this embodiment, as shown in FIG. 11, the support rubber legs 24 and the rebound side rubber portion 26 are provided in a vertically symmetrical shape in a free-form state during vulcanization.
That is, the rebound-side rubber part 26 is also formed in a straight shape in the vertical direction in the figure, like the support rubber leg 24, and a constrained surface 36 having a tapered shape is formed on the inner peripheral side of the tip part as in the support rubber leg 24 side. In addition, a constrained surface 38 having a tapered shape is formed on the outer peripheral side.
In addition, vertical slits 40 are formed at a plurality of circumferential locations (here, four locations).

In this embodiment, the inner metal fitting 86 has a plate shape, and an annular and circular large-diameter pressing portion 28 is formed at the tip of the inner metal fitting 86 as in the above embodiment. An arm 88 having a square cross section extends from the pressing portion 28 to the left in the drawing.
The arm 88 protrudes to the outside from the opening 82 in FIG. 9, and is fixed to the engine side in a fixing hole 90 at its end.

The rubber elastic body 16 has a stopper rubber portion 92 formed so as to surround the arm 86 inside the opening 82. Here, the stopper rubber portion 92 is formed integrally with the support rubber leg 24 and the rebound side rubber portion 26.
The stopper rubber portion 92 abuts on the cylindrical portion 84 of the outer metal fitting 14 and performs a stopper action.

  Also in this embodiment, the first divided body 14-1 and the second divided body 14-2 of the outer metal fitting 14 move the rubber elastic body 16, that is, the support rubber legs 24 and the rebound side rubber portion 26 shown in FIG. The rubber elastic body 16 is assembled to the rubber elastic body 16 so that the rubber elastic body 16 is pushed into the push-in chamber 56 inside the outer wall portion 50, thereby constituting the entire engine mount 10.

  For the assembly, both the support rubber leg 24 and the rebound side rubber portion 26 are compressed and deformed in the expanding direction in the vertical direction (axial direction) and the radial direction (perpendicular to the axial line), and the support rubber leg 24 in both directions. And the rebound side rubber | gum part 26 is assembled | attached with the outer metal fitting 14 in the state compressed.

  Although the embodiments of the present invention have been described in detail above, these are merely examples, and the present invention is applied to an engine mount configured by sandwiching and assembling a non-cylindrical rubber elastic body with a split outer metal fitting. For example, the present invention can be configured in various forms without departing from the spirit of the present invention.

It is sectional drawing which shows the engine mount of one Embodiment of this invention in an assembly | attachment state. It is a perspective view which shows the engine mount of the embodiment in an assembly state. It is a figure which shows the preliminary assembly in the same embodiment. It is a figure which shows the principal part process of the assembly | attachment of the engine mount of the embodiment. It is a figure which shows the principal part process following FIG. It is a figure which shows the shape change before the assembly | attachment of the rubber elastic body in the embodiment. It is a figure which shows sectional drawing of the engine mount of other embodiment of this invention. It is a figure which shows the principal part process of the assembly | attachment of the engine mount of the embodiment. It is sectional drawing which shows the engine mount of other embodiment of this invention in an assembly state. It is a top view which shows the engine mount of the embodiment in an assembly state. It is a figure which shows the preliminary assembly in the same embodiment. It is a figure which shows the example of the conventional engine mount. It is sectional drawing which shows each state before and after attachment of the engine mount of FIG.

Explanation of symbols

10 Engine mount 12 Inner fitting (inner member)
14 Outer bracket (outer member)
14-1, 14-2 Division body 16 Rubber elastic body 18 Preliminary assembly body 24 Support rubber leg 26 Rebound side rubber part 28 Pressing part 40 Slit 48 Outer wall part 56 Pushing chamber 60 First axial direction restraint part 62 First axis perpendicular Direction restricting portion 64 Second axial direction restricting portion 66 Second axis perpendicular direction restricting portion 68, 70 Fixed portion 74, 76, 78 Guide surface

Claims (7)

A rigid inner member as a mounting member on one of the engine side or the vehicle body side, a rigid outer member as a mounting member on the other side, and a state in which the inner member and the outer member are connected to each other. An engine mount having a rubber elastic body,
The rubber elastic body includes a support rubber leg that supports an engine load and a rebound side rubber portion that restricts relative displacement of the inner member when rebounding. The inner member protrudes in opposite directions in the axial direction of the support rubber leg. Is fixed at the time of vulcanization, and forms a preliminary assembly together with the inner member,
The outer member has an outer wall portion that forms an indentation chamber for the rubber elastic body inside, and is divided into a first divided body and a second divided body at the outer wall portion, and the first divided body The rebound-side rubber portion and the support rubber leg in the rubber elastic body are sandwiched in the axial direction between the body and the second divided body, and the first divided body and the second divided body are pushed into the pushing chamber. It is designed to be fastened and fixed by fixing parts provided on each of the divided bodies,
The pushing chamber has a small dimension in the axial direction relative to the rubber elastic body in a free form, and the tip of the support rubber leg in a dimension perpendicular to the axial direction of the portion corresponding to the tip of the support rubber leg has a free shape. The outer wall portion is made larger than the dimension in the direction perpendicular to the axis of the portion, and the support rubber leg is moved along with the position movement of the tip end portion of the support rubber leg by sandwiching the rubber elastic body in the axial direction. The rubber elastic body is pushed into the push-in chamber in a state in which the support rubber legs are pre-compressed in both the axial direction and the spreading direction after being expanded and deformed in a direction perpendicular to the axis.
In the outer wall portion, an axial direction restraining portion that is in contact with the distal end surface of the support rubber leg in the axial direction in a state where the pushing is completed, and that pre-compresses and restrains the axial direction of the support rubber leg, and the support rubber leg A corner perpendicular portion is provided in the corner portion to abut against the outer surface of the front end portion of the front end portion in order to apply pre-compression and restrain the pre-compression in the expansion direction. An engine mount comprising a guide surface that abuts the front end surface of the support rubber in the axial direction and expands and guides the support rubber leg with the movement of the position of the front end portion of the support rubber leg. 2. The pushing chamber according to claim 1, wherein the dimension perpendicular to the axis of the portion corresponding to the tip of the rebound-side rubber part is larger than the dimension perpendicular to the axis of the tip of the rebound-side rubber part in a free form. And the outer wall portion is deformed by expanding the rebound-side rubber portion in a direction perpendicular to the axis along with the movement of the tip portion of the rebound-side rubber portion by sandwiching the rubber elastic body in the axial direction. Furthermore, the rubber elastic body is pushed into the push-in chamber in a state where the rebound-side rubber portion is pre-compressed in both the axial direction and the spreading direction,
The outer wall portion has an axial direction restraint portion that abuts the front end surface of the rebound side rubber portion in the axial direction in a state where the pushing is completed, and applies pre-compression in the axial direction to the rebound side rubber portion and restrains the rebound side rubber portion and the rebound The corner portion is provided with an axially perpendicular restraining portion that abuts against the outer surface of the front end portion of the side rubber portion in the spreading direction to pre-compress and restrain the spreading direction. An engine comprising a guide surface that abuts the front end surface of the rebound side rubber portion in the axial direction and expands and guides the rebound side rubber portion in accordance with the position movement of the front end portion of the rebound side rubber portion. mount.   2. The engine mount according to claim 1, wherein the support rubber leg has a cylindrical shape with an open end.   4. The engine mount according to claim 3, wherein the support rubber leg is provided with a slit in an axial direction that assists the expansion deformation of the support rubber leg at a predetermined position in the circumferential direction.   3. The engine mount according to claim 2, wherein the rebound side rubber portion has a cylindrical shape with an open end.   3. The support rubber leg and the rebound side rubber portion according to claim 2, wherein each of the distal end portions has an open cylindrical shape in a free shape state, and the outer wall portion has a corresponding cylindrical shape, An engine mount characterized in that the rubber elastic body as a whole has a drum shape due to the spreading deformation of the support rubber leg and the rebound side rubber portion in a completed state.   7. The inner member according to claim 6, wherein the inner member is provided with an annular pressing portion that is larger in diameter than the inner diameter of the support rubber leg and the rebound side rubber portion, and the inner member is relatively moved toward the support rubber leg. An engine characterized in that the support rubber leg is pressed by the pressing portion and the rebound side rubber portion is pressed by the pressing portion by relative movement toward the rebound side rubber portion. mount.

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