JP2005155810A - Engine mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine mount with a side rubber stopper, which engine mount does not require a side rubber stopper as a separate component, and can be inexpensively configured with a few components and a few assembling processes. <P>SOLUTION: In the engine mount 10 having a rigid outer peripheral member 12 and a rigid inner cylinder member 14, a mount body rubber 16 integratedly adhered to them by vulcanization, and side rubber stoppers 52 which elongate toward the direction perpendicular to the axis from both end portions of the inner cylinder member 14 in the axial direction, and restrict the relative axial displacement of the inner cylinder member 14 and the outer peripheral member 12, the outer peripheral member 12 has aperture portions 18 formed therein, and the side rubber stoppers 52 are formed integratedly with the mount body rubber 16 such that the side rubber stoppers 52 elongate from both end portions of the inner cylinder member 14 in the axial direction toward the aperture portions 18 and up to the position passing the aperture portions 18. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to an engine mount, and more specifically, includes a rigid outer peripheral member and an inner cylindrical member, and a mount main body rubber therebetween, and a side rubber stopper extending in a direction perpendicular to the axis from the axial end of the inner cylindrical member. It is related with what has.

  Conventionally, as an engine mount that elastically supports the engine and insulates vibration between the engine and the vehicle body, a rigid outer cylinder member and an inner cylinder member are interposed between them and integrally vulcanized and bonded. A cylindrical engine mount having a mount main body rubber for connecting a cylindrical member and an inner cylindrical member is widely used.

FIG. 6 shows an example.
In the figure, 200 is a cylindrical engine mount, 202 is a metal rigid outer cylinder member, 204 is a metal rigid inner cylinder member, and 206 is a mount body rubber that elastically connects them.
The mount main body rubber 206 has a pair of elastic legs 208 expanded in a V shape.

Reference numeral 210 denotes a mold for the engine mount 200. The mold 210 is divided into two parts, that is, divided molds 210-1 and 210-2, which are divided in the axial direction of the engine mount 200.
In the figure, reference numeral 212 denotes a dividing plane.

  As shown in the figure, in order to mold the seed-cylinder engine mount 200, the mold 210 has an axially divided structure, and the outer cylinder member 202 and the inner cylinder member 204 are set in the cavity of the mold 210. Then, the mount body rubber 206 is vulcanized and the split molds 210-1 and 210-2 are split in the axial direction to release the molded engine mount 200.

  As described above, the mold 210 is divided in the axial direction of the engine mount 200. If the mold is divided in the direction perpendicular to the axis, the mold body 210 cannot be divided due to the presence of the undercut portion 214. by.

  By the way, in this type of cylindrical engine mount, conventionally, the axial extension of the inner cylinder member extends in the direction perpendicular to the axial direction, and the relative displacement between the inner cylinder member and the outer cylinder member is restricted. A side rubber stopper is provided.

Although it is desirable if this side rubber stopper can be molded integrally with the mount body rubber, this is actually difficult in molding a cylindrical engine mount.
FIG. 7 specifically illustrates this.

  In FIG. 7, reference numeral 216 denotes a side rubber stopper extending in a direction perpendicular to the axis from the inner cylinder member 204. FIG. 7B shows such a side rubber stopper 216 formed integrally with the mount main body rubber 206. Thus, it becomes impossible to divide the split molds 210-1, 210-2.

Therefore, conventionally, such a side rubber stopper is formed separately from the mount main body rubber between the outer cylinder member and the inner cylinder member, and is assembled to the inner cylinder member.
For example, Patent Document 1 below discloses that a side rubber stopper is molded separately from the mount main body rubber 206 and assembled to the inner cylinder member 224 as shown in FIG.

  In the figure, reference numeral 220 denotes a cylindrical vibration-proof mount used as an engine mount, 222 is an outer cylinder member, 224 is an inner cylinder member, 226 is a mount body rubber, 228 is a side rubber stopper, and 230 is U-shaped. It is a bracket on the engine side.

However, when the side rubber stopper is molded separately from the mount rubber, a separate side rubber stopper is required, which increases the number of parts that make up the engine mount and the number of assembly steps. The required cost will be high.
Furthermore, there is a problem that the side rubber stopper 228 may be forgotten to be assembled at the assembly site.

The present invention has been made to solve such problems.
In addition, there exist some which were disclosed by the following patent document 2, patent document 3, patent document 4, patent document 5, patent document 6, and patent document 7 as a prior art relevant to this invention.

Japanese Patent Laid-Open No. 9-196095 Japanese Unexamined Patent Publication No. 7-158664 Japanese Utility Model Publication No. 6-8836 JP 2000-356248 A Japanese Patent Laid-Open No. 11-270624 JP 11-63106 A JP 2003-74635 A

  The present invention is based on the circumstances as described above, and an object of the present invention is to provide an engine mount with a side rubber stopper that does not require a side rubber stopper as a separate part and can be constructed at low cost with a small number of parts and a small number of assembly steps. It was made as.

  Thus, according to the first aspect of the present invention, there is provided a rigid outer peripheral member and an inner cylindrical member, a mount main body rubber interposed between them and integrally vulcanized and bonded, and an axial end portion of the inner cylindrical member. In an engine mount that extends in a direction perpendicular to the axis and has a side rubber stopper for restricting relative displacement between the inner cylinder member and the outer peripheral member in the axial direction, a part of the outer peripheral member is cut away in the circumferential direction. The mount body rubber is shaped to form an opening, and the side rubber stopper extends from the axial end of the inner cylindrical member to the opening and to a position passing through the opening. It is characterized in that it is molded integrally with.

  According to a second aspect of the present invention, in the first aspect, the opening of the outer peripheral member is closed by a separate bottom member fastened to the outer peripheral member.

  According to a third aspect of the present invention, in the second aspect, the bottom member is constituted by a rigid mounting bracket.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the tip side portion of the side rubber stopper sandwiched between the body side bracket and the engine side bracket is formed wider than the base end portion. It is characterized by being.

Effects and effects of the invention

As described above, the present invention has a shape in which a part of the outer circumferential member is cut away in the circumferential direction to form an opening therein, and the side rubber stopper is disposed on the side of the opening from the axial end of the inner cylinder member. In addition, it is formed integrally with the mount rubber body so as to extend to a position passing through the opening.
In the present invention, even if the side rubber stopper is molded integrally with the mount body rubber, when molding the engine mount, a molded product in which the mount body rubber is molded integrally with the outer peripheral member and the inner cylinder member can be removed from the mold. It can be easily removed.

  By forming the above-mentioned opening in the outer peripheral member, when the engine mount is molded with a mold, it can be configured as a split mold in the direction perpendicular to the axis, and the side rubber stopper extends in the direction perpendicular to the axis Therefore, the side rubber stopper is not particularly obstructed when the mold is divided.

Thus, in the present invention, since the side rubber stopper is formed integrally with the mount main body rubber as described above, it is not necessary to separately form the side rubber stopper as a separate part from the mount main body rubber as in the prior art. In addition, the number of man-hours for assembling the side rubber stopper can be reduced, the number of required parts and the number of assembling steps for the engine mount can be reduced, and the cost of the engine mount can be reduced.
Moreover, the problem of forgetting to assemble the side rubber stopper as a separate part in the assembling process can be solved.

In the present invention, the opening of the outer peripheral member can be closed with a separate bottom member fastened to the outer peripheral member (claim 2).
In this case, the bottom member can be constituted by a rigid mounting bracket itself (Claim 3).
In this way, the required number of parts can be further reduced.

  Next, according to a fourth aspect of the present invention, the portion of the side rubber stopper that is sandwiched between the body side bracket and the engine side bracket is formed wider than the portion on the base end side. The pressure receiving area can be increased, the stopper function can be performed more stably, and the load applied to the side rubber stopper can be widely dispersed, so that the durability of the side rubber stopper can be enhanced.

The present invention is suitable for application to an engine mount having a pair of elastic legs in which the mount main body rubber expands in a V shape from the inner cylindrical member toward the outer peripheral member.
In the case of such an engine mount, it is possible to omit the drawing process in the diameter reducing direction on the outer circumferential member, and therefore it is not a problem even if the outer circumferential member is configured in a form in which a part in the circumferential direction is cut away. Absent.

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 according to the present embodiment, which is a metal rigid outer peripheral member 12, a metal rigid inner cylinder member 14, and an outer peripheral member 12 and an inner cylinder interposed between them. A mount main body rubber 16 for connecting the member 14 is provided.
Here, the mount body rubber 16 is integrally fixed to the outer peripheral member 12 and the inner cylinder member 14 by vulcanization adhesion.

The outer peripheral member 12 is formed by pressing a metal plate material, has a substantially U shape, and has an opening 18 at the lower end.
That is, the outer peripheral member 12 has a shape in which a cylindrical body is partially cut away, and the cutout portion is an opening 18.

The outer peripheral member 12 has a plate-like main body portion 20, and a flange portion 22 is provided in such a manner as to stand in a direction perpendicular to the axis along both axial ends of the main body portion 20.
A pair of fastening portions 24 bent in the horizontal direction are provided at both ends in the circumferential direction, and fastening holes 26 are formed there.

An extension part 32 of a bracket 30 to be described later is fastened and fixed to the fastening part 24 by fastening bolts 28, and the opening part 18 of the outer peripheral member 12 is closed by the extension part 32.
That is, the extending portion 32 is a bottom member, and a female screw hole 34 is formed at a position corresponding to the pair of fastening holes 26 in the outer peripheral member 12, and a pair of fastening bolts 28 inserted through the fastening holes 26 there. Is screwed.

The bracket 30 is a bracket for fixing the engine mount 10 to the vehicle body side, and is made of metal and cast, and has a fixing portion 36 on the right end side in the drawing. The fixing portion 36 is provided with a plurality of fixing holes 38, and the bracket 30 is fixed to the vehicle body 40 (see FIG. 2) side in the plurality of fixing holes 38.
The fixed portion 36 is provided with a plurality of ribs 42 that stand upward in the drawing.

As shown in FIG. 3, the bracket 30 has a falling portion 44 that hangs downward from the fixing portion 36, and the above-described extending portion 32 extends horizontally from the lower end portion of the falling portion 44 in the drawing. And it extends to the left.
Standing portions 43 are provided along the longitudinal direction at both ends of the extending portion 32 in the width direction, and concave portions 45 are formed in the middle portion in the longitudinal direction so as to be recessed downward in a curved shape.

  The mount main body rubber 16 includes a cylindrical portion 46 that surrounds the inner cylindrical member 14, a pair of elastic legs 48 that expand downward from the inner cylindrical member 14 toward the outer peripheral member 12, and the inner cylindrical member 14. The upper stopper portion 50 is fixedly formed on the inner peripheral surface of the outer peripheral member 12 on the upper side.

In the present embodiment, the mount main body rubber 16 is integrally formed with a side rubber stopper 52 that hangs downward in the figure (in a direction perpendicular to the axis) from the axial end of the inner cylinder member 14.
That is, a side rubber stopper 52 is integrally formed on the mount main body rubber 16 so as to extend from the axial end of the inner cylinder member 14 to the opening 18 side of the outer peripheral member 12 and to a position passing therethrough.
Here, the side rubber stopper 52 extends to a position where the tip of the side rubber stopper 52 protrudes further downward beyond the extending portion 32 of the bracket 30.

The side rubber stopper 52 has a plate shape as a whole, and a lower portion 54 on the tip side is formed wider than an upper portion 56 on the root side.
Specifically, the lower part 54 sandwiched in the axial direction by the engine-side rigid bracket 62 having a U-shaped cross section in FIG. 4 and the extending part 32 of the vehicle body-side bracket 30 is formed wide (see FIG. (See FIG. 2).

Here, the bracket 62 on the engine side is fastened and fixed to the inner cylinder member 14 by a bolt 58 and a nut 60 which are inserted through the inner cylinder member 14 as shown in FIG.
That is, in this embodiment, the engine load acts on the engine mount 10 in such a direction as to push the inner cylinder member 14 downward.
At this time, the pair of elastic legs 48 is deformed to the compression side (with shear deformation).

In the present embodiment, the rigid outer peripheral member 12 can be considered as a part of a bracket for mounting and fixing the engine mount 10 to the vehicle, specifically, mounting and fixing to the vehicle body 40 side.
That is, it can be considered that the outer cylinder member in the conventional cylindrical engine mount is omitted here, and the mount main body rubber 16 is directly vulcanized and bonded to a part of the bracket.
Therefore, in this embodiment, it can be considered that the outer cylinder member in the conventional cylindrical engine mount is omitted.

FIG. 5 shows a method for forming the engine mount 10 of this embodiment.
In the figure, reference numeral 64 denotes a molding die, which has a split structure of split dies 64-1 and 64-2.
Here, the split dies 64-1 and 64-2 are split in the direction perpendicular to the axis of the engine mount 10.
Reference numeral 65 denotes an intermediate mold, and 66 denotes a split surface of the split molds 64-1 and 64-2.

  In this embodiment, as shown in the figure, since the opening 18 is formed in the outer peripheral member 12, the pair of plate-like side rubber stoppers 52 are perpendicular to the axial direction from both axial ends of the inner cylinder member 14. Although the side rubber stopper 52 extends to the side of the opening 18 in spite of being extended, the molding die 64 is divided without any hindrance, that is, the molded product, that is, the outer peripheral member 12 and A molded product formed by integrally molding the mount main body rubber 16 and the side rubber stopper 52 with respect to the inner cylinder member 14 can be removed from the molding die 64.

As described above, in the present embodiment, the opening 18 is formed in the outer peripheral member 12 so that the side rubber stopper 52 extends from the inner cylinder member 14 toward the opening 18 and in the direction perpendicular to the axis. Therefore, the side rubber stopper 52 can be integrally formed with the mount main body rubber 16, and the conventional side rubber stopper 52 must be formed as a separate part from the mount main body rubber 16 according to the present embodiment. Thus, the side rubber stopper 52 can be molded integrally with the mount body rubber 16, so that it is not necessary to separately mold the side rubber stopper 52, the number of required parts is reduced, and the man-hour for assembling the engine mount 10 is reduced. The cost of the engine mount 10 can be reduced.
Further, the risk of forgetting to assemble the side rubber stopper 52 as a separate part in the assembling process can be eliminated.

Furthermore, in the present embodiment, since the bottom member that closes the opening 18 of the outer peripheral member 12 is constituted by a part of the bracket 30 on the vehicle body 40 side, the total number of required parts including the mounting bracket is reduced. Can do.
Conventionally, the outer cylinder member and the bracket-side cylindrical press-fitting portion (collar) for press-fitting the outer cylinder member are required, but in this embodiment, the main part of the outer cylinder member or the main part of the collar is omitted. Since it is a form, the number of required parts for mounting the engine mount 10 can be further reduced, and the configuration in the mounted state can be simplified.

  In addition, in this embodiment, since the lower portion 54 of the side rubber stopper 52, that is, the portion sandwiched between the engine side bracket 62 and the body side bracket 30 is formed wide, the pressure receiving area at the time of stopper action is widened, and the stopper action is increased. While performing stably, the load in that case is disperse | distributed over a large area, Therefore The advantage which can improve the durability of the side rubber stopper 52 is also acquired.

  Furthermore, in the engine mount 10 of the present embodiment, it is not necessary to draw the outer cylinder member in the diameter reducing direction and apply pre-compression to the mount main body rubber as in the case of a conventional general cylindrical engine mount (elasticity). Since the leg 48 expands in a V shape and receives an engine load in the compression direction), there is an advantage that the extending portion 32 of the outer peripheral member 12 and the bracket 30 can be configured without considering drawing.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in various forms without departing from the spirit of the present invention.

It is a perspective view which shows the engine mount of one Embodiment of this invention with a bracket. It is a partially notched front view which shows the engine mount of the embodiment with a bracket. It is a perspective view which decomposes | disassembles and shows the engine mount of the embodiment with a bracket. It is side surface sectional drawing which shows the engine mount of the embodiment with an engine side bracket. It is explanatory drawing of the shaping | molding method of the engine mount of the embodiment. It is a figure which shows an example of the conventional engine mount with the shaping | molding method. It is explanatory drawing of the problem in the case of providing a side rubber stopper integrally with the engine mount of FIG. It is a figure which shows an example of the conventional engine mount which made the side rubber stopper a different body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Engine mount 12 Outer peripheral member 14 Inner cylinder member 16 Mount main body rubber 18 Opening part 30 Bracket 48 Elastic leg 52 Side rubber stopper 54 Lower part 62 Bracket

Claims (4)

A rigid outer peripheral member and an inner cylindrical member, a mount main body rubber that is interposed between them and integrally vulcanized and bonded thereto, and extends in the direction perpendicular to the axial direction from the axial end of the inner cylindrical member; In an engine mount having a member and a side rubber stopper for relative axial displacement restriction between the outer peripheral member,
The outer peripheral member has a shape in which a part in the circumferential direction is cut out to form an opening, and the side rubber stopper is disposed on the side of the opening from the axial end of the inner cylinder member. An engine mount characterized by being molded integrally with the mount main body rubber so as to extend to a passing position.   The engine mount according to claim 1, wherein the opening of the outer peripheral member is closed by a separate bottom member fastened to the outer peripheral member.   3. The engine mount according to claim 2, wherein the bottom member is constituted by a rigid mounting bracket.   The engine according to any one of claims 1 to 3, wherein a portion of the side rubber stopper between the front end side sandwiched between the body side bracket and the engine side bracket is formed wider than the base end side portion. mount.

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