JP2011075006A - Rubber stopper installing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber stopper installing structure securing high spring stiffness to improve the durability even when a rubber stopper is installed to a bracket without adhesion, avoiding stress concentration on the root portions of insertion shafts for installation and solving a problem that the insertion shafts potentially break. <P>SOLUTION: A block-like holding portion 56 is formed integrally and continuously to the stopper body 54 of the rubber stopper 18 and a bottomed fitting recess 70 is provided in the bracket 52. The holding portion 56 is fitted in the fitting recess 70 to fill the fitting recess 70 with the holding portion 56 with the insertion shafts 58 projected from the lower face of the holding portion 56. Insertion holes 74 are provided in the bottom 72 of the fitting recess 70. The rubber stopper 18 is installed to the bracket 52 with the bottom 72 elastically caught from both the front and rear sides by the holding portion 56 and locking portions 60. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure for assembling a rubber stopper configured separately from a mount body in a vibration-proof mount.

  Conventionally, in an anti-vibration mount such as an engine mount that supports a vehicle engine in an anti-vibration manner and a member mount that supports an anti-vibration suspension member in a vibration-proof manner, the plate is separated from a mount body that supports a vibration-proof target such as an engine or a suspension member. A rubber stopper is formed and assembled to a rigid bracket on the other side.

  Also, as its assembly structure, the rubber stopper has the following rubber insertion shaft portion and latching portion, i.e., (a) a rubber plate-like shape that is placed and seated on the support surface of the rigid bracket. A stopper body, (b) a rubber insertion shaft part formed integrally with the stopper body, and (c) a bracket formed integrally with the insertion shaft part. It is located on the back side of the bracket and has a configuration with a rubber hooking portion having a larger diameter than the insertion shaft portion, which is hooked on the back surface of the bracket, and the insertion shaft portion is inserted into the insertion hole. A structure is employed in which a rubber stopper is assembled to the bracket so that the hook is hooked on the back surface of the bracket, and the bracket is elastically clamped from both the front and back sides by the front stopper body and the back hook.

FIG. 7 shows a specific example thereof.
In FIG. 7, reference numeral 200 denotes a rubber stopper configured separately from the mount body, and 202 denotes a mating rigid bracket.
The bracket 202 is formed with an insertion hole 204 that penetrates the bracket 202 in a thickness direction at a predetermined position. In this example, the insertion holes 204 are provided at three different positions.

  The rubber stopper 200 has a plate-like stopper main body 206 that has a plate shape and is placed on the support surface 205 of the bracket 202 and seated thereon, and a rod-shaped insertion shaft that protrudes downward from a seating surface (lower surface) 208 of the stopper main body 206. And a hook portion 212 having a larger diameter than the insertion shaft portion 210 and formed integrally with the insertion shaft portion 210 in a form protruding in a direction perpendicular to the axis at a position separated from the seating surface 208. It consists of

  Then, as shown in FIG. 7B, the insertion shaft portion 210 is inserted into the insertion hole 204 of the bracket 202, and the latching portion 212 is latched on the back surface of the bracket 202. The rubber stopper 200 is assembled to the bracket 202 in a state where the bracket 202 is elastically sandwiched between the front and back sides with the stopper main body 206.

In this assembly structure, the portion between the latching portion 212 and the stopper main body 206 in the insertion shaft portion 210 is a neck portion 211, and the portion protruding from the latching portion 212 toward the tip side is a small diameter. The pulling portion 214 is made.
In this assembly structure, the pulling portion 214 is pulled downward as shown in FIG. 8 in actual assembly, so that the insertion shaft portion 210 is inserted into the insertion hole 204 of the bracket 202, and the latching portion. 212 is allowed to pass through the insertion hole 204 and is elastically brought into contact with the back surface of the bracket 202, so that the bracket 202 is elastically sandwiched from both the front and back sides by the hook portion 212 and the stopper main body 206.

  Specifically, first, the pulling portion 214 is inserted downward in the drawing into the insertion hole 204 of the bracket 202 (see FIG. 8 (I)), and then the pulling portion 214 is inserted from the back side of the bracket 202 as shown in FIG. 8 (II). Then, a pulling force is applied downward, the hook 212 is passed through the insertion hole 204, and the neck 211 is fitted into the insertion hole 204.

At this time, as shown in FIG. 8 (III), the pulling portion 214 is pulled downward to a position where the latching portion 212 is separated from the back surface of the bracket 202, and then the pulling force is released.
Due to the release of the pulling force, the insertion shaft portion 210 that has been extended and deformed in the axial direction, more specifically, the neck portion 211 is contracted in the axial direction by the elastic restoring force, and the latching portion 212 is also moved by the elastic restoring force to the bracket 202. It is in a state where it is elastically abutted on the back side surface and hooked.

The assembly structure of the rubber stopper that forms a separate body as described above is disclosed, for example, in Patent Document 1 below.
However, in the case of this assembly structure, when the rubber stopper 200 is assembled to the bracket 202, the rubber stopper 200 is first placed on the bracket 202 from the front side, and then the pulling portion is grasped from the back side of the bracket 202 and further pulled. In the case of an anti-vibration mount, the insertion shaft part 210, the hooking part 212, and the pulling part 214 are usually provided at a plurality of locations of the rubber stopper 200. The above-described work has to be performed at each of a plurality of locations, and there has been a problem that requires a great deal of time for assembly.

Therefore, a technique aimed at solving such a problem is disclosed in Patent Document 2 below.
The rubber stopper assembly structure shown in Patent Document 2 includes an inner hole 216 that penetrates the plate-like stopper body 206 in the thickness direction and reaches the inside of the insertion shaft portion 210 as shown in FIG. The rubber stopper 200 is assembled to the bracket 202 by inserting the push pin 220 into the inner hole 216 and applying a downward pushing force in the figure with the bracket 202 being received by the receiving jig 218. It was made.

  In this assembly structure, when the push pin 220 is inserted into the inner hole 216 and a downward pressing force is applied, the thin neck portion 211 of the insertion shaft portion 210 extends and deforms in the axial direction, and the latch portion 212. Passes through the insertion hole 204 from the front side to the back side, and when the pushing force is removed in that state, the latching portion 212 is hooked on the back side surface of the bracket 202 by the elastic restoring force of the rubber. In this state, the latching portion 212 and the rubber stopper main body 206 are in a state where the bracket 202 is elastically sandwiched from both the front and back sides, and the rubber stopper 200 is assembled to the bracket 202.

  However, in both the assembly structure shown in FIGS. 7 and 8 and the assembly structure shown in FIG. 9, the insertion shaft portion 210 is inserted into the insertion hole 204 of the bracket 202, and the rubber stopper 200 is not bonded. 202, when a load at the time of stopper action is repeatedly applied to the stopper body 206, stress concentrates on the root of the insertion shaft portion 210, and the root of the insertion shaft portion 210 is used during use. There is a possibility that a crack may occur in this portion, and in some cases, the insertion shaft portion 210 may be broken.

  In this case, since the rubber stopper 200 is not bonded to the bracket 202, the rubber stopper 200 may fall off the bracket 202.

  Further, since the plate-like stopper main body 206 is not bonded to the bracket 202, when a downward load is applied to the stopper main body 206 in the plate thickness direction when the stopper is operated, as shown in the schematic diagram of FIG. In addition, the stopper main body 206 is deformed and escapes in the horizontal direction due to the sliding of the seating surface 208 of the stopper main body 206 with respect to the support surface 205 of the bracket 202, so that the upward elastic reaction force by the stopper main body 206 in the figure is sufficient. Therefore, the function of the stopper, that is, the original function of regulating displacement cannot be sufficiently obtained.

This is the same even when a load is applied to the stopper body 206 in the horizontal direction, that is, in the vehicle front-rear and left-right directions. At this time, the stopper body 206 escapes in the direction of the load with sliding against the bracket 202. As a result, a sufficient displacement regulating force cannot be obtained.
Further, since the plate-like stopper main body 206 is largely displaced in the horizontal direction with a slip, the durability of the stopper main body 206 and hence the rubber stopper 200 may be lowered.

  In addition, in the case of the assembly structure shown in FIG. 9, when the axial positions of the insertion shaft portion 210 of the rubber stopper 200 and the insertion hole 204 of the bracket 202 are misaligned (center misalignment), or the insertion shaft portion 210. When the position of the axis of the push pin 220 is deviated from the above, the resistance applied to the latching portion 212 is uneven when the latching portion 212 enters the insertion hole 204 or attempts to pass through it. Or the pushing force of the push pin 220 against the latching portion 212 may be applied at a position deviated from the center position. In this case, the insertion shaft portion 210 is soft and deformed as shown in FIG. The portion on the tip side of the push pin 220 including the neck portion 211 that is easily deformed is inclined and buckled, so that the latching portion 212 cannot smoothly pass through the insertion hole 204 and is sometimes hung. Above the stop 212 Worked sideways force of the push pin 220 relative to the neck portion 211 in location, it was found that push pins 220 a fear that breaks through the neck portion 211.

Incidentally, as a prior art to the present invention, in Patent Document 3 below, as a structure for assembling the stabilizer bush to the bracket, a rubber block is also provided at the root of the rubber engaging claw for assembling the stabilizer bush. The point which provided is disclosed.
However, the function of the block disclosed in Patent Document 3 is different from that of the present invention, and that disclosed in Patent Document 3 is different from that of the present invention.

Japanese Patent Laid-Open No. 11-173370 Japanese Patent No. 4103763 JP 2002-274145 A

The present invention is based on the above circumstances, and even when a rubber stopper that is separate from the vibration-proof mount is assembled to the bracket without bonding, the spring rigidity at the time of the stopper action of the rubber stopper can be secured high, As a result, the durability of the rubber stopper can be increased, and even when the rubber stopper is assembled to the bracket by inserting the insertion shaft portion, the insertion shaft portion is caused by stress concentration at the root of the insertion shaft portion. The object of the present invention is to provide a rubber stopper assembly structure that can eliminate the risk of breakage.
Another object of the present invention is to improve the assembly workability of the rubber stopper to the bracket. At that time, the insertion shaft portion falls down and deforms or buckles, so that the assembly work can be performed well. It is an object to solve the problem that there is no possibility that the insertion shaft part is broken or the insertion shaft part is broken.

  Thus, according to the first aspect of the present invention, the rubber stopper, which is separate from the mount body for supporting the vibration-proof object as a load, is mounted on the support surface of the rigid bracket and is seated on the rubber plate. (B) a rubber insertion shaft portion formed integrally with the stopper body, and (c) integrally formed with the insertion shaft portion. And a hooking portion made of rubber having a diameter larger than that of the insertion shaft portion, which is formed on the back side of the bracket and is hooked on the back surface of the bracket. The rubber stopper is assembled to the bracket in a non-adhering state so that the stopper main body is seated on the support surface by inserting into the insertion hole of the bracket and engaging the engaging portion with the back surface of the bracket. In the rubber stopper assembly structure as described above, The stopper is integrally formed with a block-shaped rubber restraint portion continuously from the lower surface of the stopper body, while the bracket has a bottomed fitting recess having a shape corresponding to the restraint portion. It is provided in a form that is recessed from the surface, and the fitting recess is filled with the restraining portion by fitting the restraining portion into the fitting recess, and the insertion shaft portion further extends from the lower surface of the restraining portion. The rubber stopper is assembled to the bracket in a state where the insertion hole is provided at the bottom of the fitting recess and the bottom is elastically clamped from both the front and back sides by the restraining portion and the hooking portion. It is characterized by that.

  According to a second aspect of the present invention, in the first aspect, the rubber stopper includes a non-insertion shaft portion that penetrates the stopper main body and the restraining portion in the thickness direction and reaches the insertion shaft portion. An inner hole through which a push pin that applies a downward force to the insertion shaft portion is inserted, and the inner hole includes the hook portion and the hook portion in the insertion shaft portion. It is provided at a depth that passes through the neck between the restraining portion and reaches the position inside the latching portion.

  According to a third aspect of the present invention, in the second aspect, the latching portion has a maximum diameter portion at an intermediate portion in the axial direction, the surface on the root side of the insertion shaft portion with respect to the maximum diameter portion, Both of the surfaces on the distal end side of the insertion shaft portion are surfaces inclined in opposite directions toward the maximum diameter portion, and the latching portion has a mountain shape in cross section.

  According to a fourth aspect of the present invention, in the third aspect, the angle θ formed by the surface on the root side of the insertion shaft portion with respect to the direction perpendicular to the axis from the maximum diameter portion is greater than 0 ° and smaller than 90 °. It is characterized by being an angle of.

Effects and effects of the invention

  As described above, according to the present invention, the insertion shaft portion is inserted into the insertion hole of the bracket, the latching portion formed integrally with the insertion shaft portion is latched on the back surface of the bracket, and the rubber stopper is attached to the bracket. In the mounting structure, the rubber stopper is integrally formed with a block-shaped rubber restraint portion that is continuous with the stopper body, while the bracket has a bottomed recessed recess that has a shape corresponding to the restraint portion from the support surface. It is provided in a recessed form, and the fitting recess is filled with the restraining portion by fitting into the fitting recess, and the insertion shaft portion is further projected from the restraining portion, and the bracket side is inserted. The insertion hole is provided at the bottom of the fitting recess, and the rubber stopper is assembled to the bracket in a state in which the bottom is elastically clamped from both the front and back sides by the restraining portion and the latching portion.

In the rubber stopper mounting structure of the present invention, the block-like restraining portion formed continuously on the lower surface of the plate-like stopper main body is fitted and restrained in the fitting recess of the bracket.
Therefore, when a load in the plate thickness direction is applied to the plate-shaped stopper main body during the stopper operation, the phenomenon that the stopper main body escapes along the support surface of the bracket while sliding with respect to the bracket can be effectively suppressed. .

As a result, the stopper body can effectively compressively elastically deform in the plate thickness direction (thickness direction) when the stopper acts, and can exert a large elastic reaction force, that is, a displacement regulating force.
That is, according to the present invention, a large deformation resistance can be exerted against a downward load on the stopper body, and the original displacement regulating function can be sufficiently exhibited.

  Similarly, even when a load in the direction along the support surface of the bracket with respect to the stopper body, that is, a load in the front-rear and left-right directions is applied to the stopper body, a good stopper function is achieved by the restraining action of the restraining portion on the stopper body. It can be demonstrated.

In the present invention, the insertion shaft portion for assembling the rubber stopper protrudes from the restraining portion, and the bottom portion of the fitting recess of the bracket is front and back with the restraining portion and the latching portion formed on the insertion shaft portion. Since the insertion shaft portion protrudes from the restraint portion that does not cause position movement due to the applied load, because it is elastically clamped from both sides, even when a load is repeatedly applied to the rubber stopper, It is possible to effectively prevent stress from being concentrated on the root portion of the insertion shaft portion, and therefore to effectively prevent the insertion shaft portion from being liable to crack or break due to stress concentration at the root portion. it can.
This also prevents the rubber stopper from falling off the bracket.

  In addition, even if the insertion shaft may break, the rubber stopper has a block-like restraining part that fits into the insertion recess of the bracket, and the rubber stopper is held by the bracket due to the fitting. Therefore, it is possible to effectively prevent the rubber stopper from dropping off from the bracket immediately after the insertion shaft portion is broken.

  In addition, since the stopper main body is prevented from slipping and largely displacing on the support surface of the bracket, the durability of the rubber stopper can be enhanced.

Next, a second aspect of the present invention provides an inner hole that penetrates the rubber stopper main body and the block-shaped restraining portion and reaches the inside of the insertion shaft portion, and the inner hole is constrained with the latching portion in the insertion shaft portion. The depth is such that it passes through the neck between the two parts and reaches the position inside the latching part.
In this second aspect, by inserting a push pin into the inner hole and applying a downward pushing force, the insertion shaft portion can be inserted into the insertion hole of the bracket, and the rubber stopper can be assembled to the bracket.

  Thus, in this second aspect, since the inner hole is provided at a depth that reaches the inner position of the latching portion, the insertion shaft portion is pushed downward by the push pin to insert the insertion hole of the bracket. The insertion shaft part is deformed because the neck part is unstable and unstable when inserted in, so that the latching part can not pass through the insertion hole smoothly, the insertion work can not be done smoothly, Alternatively, the problem that the neck portion may be broken by the push pin in some cases can be solved, and the rubber stopper can be assembled to the bracket with good workability.

In this case, the hooking portion has a maximum diameter portion in the middle portion in the axial direction, and the root side surface of the insertion shaft portion and the surface on the distal end side are both the maximum diameter portion with respect to the maximum diameter portion. The hooks can be formed in a cross-sectional mountain shape with the surfaces inclined in opposite directions.
Specifically, the root-side surface of the insertion shaft portion with respect to the maximum diameter portion shifts radially outward as it advances toward the distal end side of the insertion shaft portion, and becomes the maximum diameter portion. No surface to reach, and the surface on the tip side from the maximum diameter part is shifted to the outside in the radial direction as it goes toward the root side of the insertion shaft part, and there is no surface to reach the maximum diameter part I can keep it.

  If it does in this way, the insertion property (insertion property) at the time of inserting an insertion shaft part in an insertion hole so that a latching part may pass through an insertion hole will become favorable, and a push pin will be in that case. A problem that may break through the insertion shaft can be solved.

Here, the surface on the root side of the insertion shaft portion with respect to the maximum diameter portion can be configured such that the angle θ formed with respect to the direction perpendicular to the axis is larger than 0 ° and smaller than 90 °. (Claim 4).
If θ is 90 °, the latching portion will easily pass through the insertion hole in the removal direction.

It is a figure of the attachment state of the engine mount containing the assembly structure of the rubber stopper of one Embodiment of this invention. It is a figure of the assembly structure of the rubber stopper of FIG. It is the figure which showed the rubber stopper of FIG. 2 in the state before the assembly | attachment to a bracket. It is the figure which showed the procedure of the assembly in the assembly structure of the embodiment. It is a figure of other embodiment of this invention. It is a figure of other embodiment of this invention. It is a figure which shows an example of the assembly structure of the conventional rubber stopper. It is the figure which showed the assembly | attachment procedure of the assembly structure of the rubber stopper of FIG. It is explanatory drawing of the assembly structure of the rubber stopper different from FIG. It is explanatory drawing of the deformation | transformation state of the stopper main body at the time of the stopper effect | action of the assembly structure shown in FIG.7, FIG8 and FIG.9. It is explanatory drawing which showed typically the mode at the time of an assembly | attachment structure shown in FIG. 9 when an insertion shaft part and a peripheral part deform | transform irregularly.

Next, an embodiment in which the present invention is applied to a rubber stopper assembly structure configured separately from a mount body of an engine mount will be described in detail with reference to the drawings.
In FIG. 1, 10 is a metal bracket on the engine side that extends from the engine in the left-right direction of the vehicle, 12 is a cylindrical portion that forms a part of the bracket on the vehicle body side, and 14 is an anti-vibration support for the engine via the bracket 10. It is an engine mount.
The engine mount 14 includes a mount body 16 that supports the load of the engine, and a rubber stopper 18 that is configured separately from the mount body 16.

The mount main body 16 is vulcanized and bonded to the inner metal fitting 19 located at the upper part in the drawing, the cylindrical outer cylinder fitting 20 located at the lower part in the drawing, and the inner metal fitting 19 and the outer cylinder fitting 20. A rubber support portion 24 made of a rubber elastic body for elastically connecting the metal fitting 20 and the inner metal fitting 19 is provided. The outer cylinder fitting 20 is press-fitted into the cylindrical portion 12 of the vehicle body side bracket and is fitted in the cylindrical portion 12. The inner bracket 19 is fastened to the engine-side bracket 10.
Here, the inner metal fitting 19 has a plate portion 30 and a protruding portion 32 protruding downward from the plate portion 30, and the protruding portion 32 is embedded in the rubber support portion 24.

A metal partition member 34 is provided inside the mount body 16, and the partition member 34 divides the interior of the mount body 16 into an upper main liquid chamber 36 and a lower sub liquid chamber 38. Yes.
Here, the upper main liquid chamber 36 is formed by the partition member 34 and the rubber support portion 24, and the lower sub liquid chamber 38 is formed by the partition member 34 and a lid body 42 having a rubber diaphragm 40. Is formed by.

In this lid body 42, a cylindrical metal fitting 44 is integrated with the outer peripheral end portion of the diaphragm 40 by vulcanization adhesion, and the lid body 42 is fitted into the outer cylinder metal fitting 20 via a rubber seal portion 46. I'm hurt.
Here, the rubber seal portion 46 is integrally formed in a cylindrical shape continuously with the rubber support portion 24, and the outer cylinder fitting 20 is caulked with its lower end portion bent inward in the drawing.
In the figure, reference numeral 48 denotes the caulking portion. The caulking portion 48 holds the lid body 42 in a prevented state.

An upper orifice passage 50-1 and a lower orifice passage 50-2 continuous in the circumferential direction are formed on the outer peripheral portion of the partition member 34.
The upper orifice passage 50-1 communicates with the main liquid chamber 36 through an opening (not shown), and the lower orifice passage 50-2 communicates with the lower auxiliary liquid chamber 38 through an opening (not shown). .
In the mount body 16, the liquid sealed in the main liquid chamber 36 and the sub liquid chamber 38 moves from one side to the other side and from the other side to the other side through the orifice passages 50-1 and 50-2. Vibration damping is performed based on the flow of

In FIG. 1, reference numeral 52 denotes a metal bracket for the rubber stopper 18 that is integrated with the cylindrical portion 12 that forms a part of the vehicle body side bracket. The rubber stopper 18 is assembled to the bracket 52.
Here, when the engine-side bracket 10 is relatively displaced downward, the rubber stopper 18 abuts on the bracket 10 to restrict excessive displacement of the bracket 10. That is, in this example, the rubber stopper 18 is a bound stopper.

2 and 3 specifically show the structure for assembling the rubber stopper 18 to the bracket 52.
As shown in the figure, a separate rubber stopper 18 made of a rubber elastic body is a flat plate-like (in this case, planar rectangular shape) stopper main body 54 that is placed and seated on a support surface 68 described later of the bracket 52. A block-shaped restraining portion 56 that projects downward from the lower surface of the stopper main body 54 and has a smaller outer shape than the stopper main body 54, and a pair of insertions that project downward at positions further away from the lower surface of the restraining portion 56 The shaft portion 58 and the latching portion 60 having a larger diameter than the insertion shaft portion 58 are formed integrally with the insertion shaft portion 58 at a position spaced downward from the lower surface of the restraining portion 56. ing.

Here, in the insertion shaft portion 58, the axial dimension of the neck portion 62 between the latching portion 60 and the block-like restraining portion 56 is smaller than the thickness of the bottom 72 of the bracket 52 described later. .
Further, the tip end portions of these insertion shaft portions 58 protruding downward from the latching portion 60 are fitted into the rear insertion holes 74 (see FIG. 3A) when the rubber stopper 18 is assembled. The positioning unit 63 performs positioning.
In this embodiment, the neck portion 62 and the positioning portion 63 have the same diameter.

The bracket 52 is substantially U-shaped in plan, and is fixed to the cylindrical portion 12 that forms part of the bracket on the vehicle body side, and a support portion 66 that is welded to the upper end thereof and supports the rubber stopper 18. And have.
The fixed portion 64 has a cylindrical portion 12 side surface and an upper and lower surface both open, and both end portions on the cylindrical portion 12 side are fixed to the cylindrical portion 12 by welding.
Further, the open portion at the upper end is closed by a plate-like support portion 66.
Here, as shown in FIG. 1, the support portion 66 protrudes to the left side in FIG. 1 until the end portion on the rubber support portion 24 side overlaps with the outer peripheral portion of the rubber support portion 24 in the vertical direction.

The support portion 66 is a fitting recess 70 having a substantially central portion, specifically, a portion corresponding to the block-like restraining portion 56 of the rubber stopper 18 that is recessed from the support surface 68.
The fitting recess 70 is a bottomed part having a bottom part 72, and a pair of insertion holes 74 are formed in the bottom part 72 at positions corresponding to the pair of insertion shaft parts 58 in the rubber stopper 18. .

The fitting recess 70 has the same depth as the thickness in the vertical direction of the restraining portion 56 of the rubber stopper 18, and the planar outer shape is the same as the outer shape of the restraining portion 56.
Therefore, when the restraining portion 56 is fitted into the fitting recess 70, the bottom 72 is in contact with the lower surface of the restraining portion 56, and the peripheral wall 77 of the fitting recess 70 is in contact with the outer peripheral surface of the restraining portion 56. The fitting recess 70 is filled with the restraining portion 56.

As shown in FIG. 2, the rubber stopper 18 passes through the stopper body 54 and the block-like restraining portion 56 from the upper surface opposite to the seating surface (lower surface) 76 that is an assembly surface with respect to the bracket 52, A pair of inner holes 78 reaching the inside of the insertion shaft portion 58 is provided.
Each of the pair of inner holes 78 has a reverse taper shape with a gradually decreasing diameter in the depth direction, and the depth is the inner position of the latching portion 60 in the insertion shaft portion 58, specifically the insertion shaft portion. It is provided at a depth that passes through the neck 62 at 58 and reaches the position inside the latch 60.

  On the other hand, the latching portion 60 has a maximum diameter portion 84 at an intermediate portion between the upper end and the lower end in the axial direction, and a surface above the maximum diameter portion 84 (surface on the root side of the insertion shaft portion 58) 80 The lower surface (the surface on the distal end side of the insertion shaft portion 58) 82 is a surface inclined in opposite directions toward the maximum diameter portion 84, and the latching portion 60 has a mountain shape in cross section. Is formed.

  Specifically, the surface 80 above the maximum diameter portion 84 is a surface that moves outward in the radial direction and reaches the maximum diameter portion 84 as it proceeds toward the distal end side of the insertion shaft portion 58. Further, the lower surface 82 is a surface that moves outward in the radial direction and reaches the maximum diameter portion 84 as it proceeds toward the root side of the insertion shaft portion 58.

In the present embodiment, the upper surface 80 of the latching portion 60 has an angle θ with respect to the direction perpendicular to the axis that is larger than 0 ° and smaller than 90 °.
Specifically, in this embodiment, θ = 22 °.
The lower surface 82 has an angle of 53 ° with respect to the direction perpendicular to the axis.

  As shown in FIG. 2, in this embodiment, the block-like restraining portion 56 of the rubber stopper 18 is fitted into the fitting recess 70, and a pair of insertion shaft portions 58 are provided at the bottom 72 of the fitting recess 70. The rubber stopper 18 is assembled to the bracket 52 in a non-adhesive manner by being inserted into the corresponding pair of insertion holes 74.

Specifically, when the pair of insertion shaft portions 58 are inserted into the insertion holes 74, and when the latching portion 60 is positioned behind the bottom portion 72 of the bracket 52 through the insertion hole 74 at this time, the latching portion 60. Is hooked on the back surface of the bottom portion 72 to prevent the rubber stopper 18 from being pulled out from the bracket 52.
At this time, the latching portion 60 and the block-shaped restraining portion 56 are in a state in which the bottom portion 72 of the fitting recess 70 in the bracket 52 is elastically sandwiched from both the front and back sides, and the rubber stopper 18 is fixed to the bracket 52. It becomes.

FIG. 4 shows the procedure of the method for assembling the rubber stopper 18 to the bracket 52.
As shown in FIG. 4, in this embodiment, the rubber stopper 18 is positioned on the upper side of the bracket 52, and the positioning portion 63 of the distal end portion of the insertion shaft portion 58 is fitted into the insertion hole 74 of the bracket 52. Position them together.
Thereafter, as shown in FIG. 4 (I), a push pin 86 having a reverse taper shape is inserted into the inner hole 78 of the rubber stopper 18 and, specifically, the insertion shaft portion 58 is inserted into the rubber stopper 18. Apply a downward force to.

Due to the downward force of the push pin 86, the latching portion 60 passes through the insertion hole 74 and is moved to a position away from the lower surface of the bottom portion 72 along with the axial extension of the neck portion 62 (FIG. 4 (II )reference).
Thereafter, when the force applied to the push pin 86 is removed, the neck portion 62 is contracted in the axial direction by the elastic restoring force of the neck portion 62 and the latching portion 60 is latched on the lower surface of the bottom portion 72 as shown in FIG. Then, the latching portion 60 and the restraining portion 56 are in a state where the bottom portion 72 is elastically sandwiched from both the front and back sides, and the rubber stopper 18 is fixed and assembled to the bracket 52 here.

In this embodiment, since the inner hole 78 is formed deeply to a position where it passes through the neck 62 of the insertion shaft portion 58 and is applied to the latching portion 60, the downward force by the push pin 86 is applied to the latching portion 60. It is added directly to the part below the middle part.
Therefore, the axial position of the push pin 86 inserted into the inner hole 78 is slightly misaligned from the axis of the inner hole 78, or the axis of the neck 62 of the insertion shaft portion 58 is relative to the axis of the insertion hole 74. Even when the center is misaligned, the thin neck portion 62 is inserted by the downward pushing force of the push pin 86, as in the conventional assembly structure shown in FIG. The shaft portion 58 is not smoothly inserted into the insertion hole 74, and the neck portion 62 of the insertion shaft portion 58 is tilted while being pushed with a strong force by the push pin 86 without causing a risk of breaking. The part 58 can be inserted into the insertion hole 74.

  In addition, since the latching portion 60 has a mountain-shaped cross section in this embodiment, the upper surface 80 and the lower surface 82 are inclined in opposite directions toward the maximum diameter portion 84 in detail. Therefore, as the push pin 86 is pushed, the maximum diameter portion 84 of the latching portion 60 is deformed so as to reduce the diameter along with the axial deformation of the neck portion 62, and the maximum diameter portion 84 is thus latched. The portion 60 can smoothly pass through the insertion hole 74 of the bracket 52 with less resistance.

In the present embodiment as described above, the block-like restraining portion 56 formed continuously with the stopper main body 54 is fitted into the fitting recess 70 of the bracket 52 and restrained.
For this reason, when a load in the plate thickness direction is applied to the plate-shaped stopper main body 54 during the stopper action, the stopper main body 54 escapes along the support surface 68 of the bracket 52 while sliding with respect to the bracket 52. It can be effectively suppressed.

  As a result, the stopper main body 54 can be effectively compressed and elastically deformed in the plate thickness direction (thickness direction) when the stopper acts, and a large elastic reaction force, that is, a displacement regulating force can be exhibited. That is, a large deformation resistance force can be exhibited against a downward load on the stopper main body 54, and the original displacement regulating function can be sufficiently exhibited.

  Similarly, even when a load in the direction along the support surface 68 of the bracket 52 with respect to the stopper main body 54, that is, when a load in the front-rear and left-right directions is applied to the stopper main body 54, A good stopper function can be exhibited.

Further, in the present embodiment, the insertion shaft portion 58 protrudes from the restraint portion 56 that does not cause position movement due to the applied load, and the bracket is formed by the restraint portion 56 and the latching portion 60 formed on the insertion shaft portion 58. Since the bottom portion 72 of the fitting recess 70 of 52 is elastically clamped from both the front and back sides, stress is concentrated on the root portion of the insertion shaft portion 58 even when a load is repeatedly applied to the rubber stopper 18. Therefore, it is possible to effectively prevent the insertion shaft portion 58 from being cracked or broken due to stress concentration at the root portion.
This also prevents the rubber stopper 18 from falling off the bracket 52.

  Further, even if the insertion shaft portion 58 may break, the rubber stopper 18 has the block-like restraining portion 56 fitted in the fitting recess 70 of the bracket 52, and the rubber stopper 18 is fitted by the fitting. Since 18 is held by the bracket 52, it is possible to effectively prevent the rubber stopper 18 from immediately dropping off from the bracket 52 due to the insertion shaft portion 58 breaking.

  In addition, since the stopper main body 54 is prevented from slipping over the support surface 68 of the bracket 52 and greatly displaced, the durability of the rubber stopper 18 can be enhanced.

  Furthermore, in this embodiment, since the inner hole 78 is provided in the insertion shaft portion 58 at a depth that passes through the neck portion 62 and reaches the position inside the latching portion 60, it is inserted by the push pin 86. When the shaft portion 58 is pushed downward to be inserted into the insertion hole 74 of the bracket 52, this can be performed smoothly, and the rubber stopper 18 can be assembled to the bracket 52 with good workability.

  In addition, in this embodiment, since the latching portion 60 is formed to have a cross-sectional mountain shape, the insertion shaft portion 58 is inserted into the insertion hole 74 so that the latching portion 60 passes through the insertion hole 74. The insertion property (insertability) during insertion becomes better.

  In the above embodiment, a plurality of, specifically, a pair of insertion shaft portions 58 are protruded from one block-like restraining portion 56. However, as shown in FIG. A plurality of, more specifically, here, two separate restraining portions 56-1 and 56-2 are provided corresponding to each insertion shaft portion 58, and the insertion shaft portion 58 is protruded from each. You can also.

Alternatively, as shown in FIG. 6, the rubber stopper 18 is provided with a restraining portion 56-3 in such a manner that the insertion shaft portion 58 does not protrude, and this is fitted into a fitting recess 70 provided corresponding to the bracket 52. It is also possible to do so.
In this case, a larger number of restraining portions 56 are fitted in the corresponding number of fitting recesses 70 of the bracket 52, and the restraining action by the restraining portions is obtained at a plurality of more locations, and the spring of the rubber stopper 18 is obtained. The rigidity can be increased more effectively.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be applied to a separate rubber stopper assembly structure in a member mount other than the engine mount or other vibration-proof mount. For example, the present invention can be configured in various forms without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 14 Engine mount 16 Mount main body 18 Rubber stopper 52 Bracket 54 Stopper main body 56 Restraining part 58 Insertion shaft part 60 Latching part 62 Neck part 68 Support surface 70 Insertion recessed part 72 Bottom part 74 Insertion hole 76 Seating surface 78 Inner hole 80 Upper side Surface 82 Lower surface 84 Maximum diameter 86 Push pin

Claims (4)

A rubber stopper that is separate from the mount body that supports the vibration-proof object as a load, (a) a rubber plate-shaped stopper body that is placed on and supported by a rigid bracket support surface, and (b) the bracket A rubber insertion shaft portion formed integrally with the stopper body, and (c) formed integrally with the insertion shaft portion and positioned on the back side of the bracket. And a hooking portion made of rubber having a diameter larger than that of the insertion shaft portion, which is hooked on the back surface of the bracket, and the insertion shaft portion is inserted into the insertion hole of the bracket. A rubber stopper assembly structure in which the rubber stopper is non-adhered to the bracket so that the stopper main body is seated on the support surface by hooking the hook portion on the back surface of the bracket. In
The rubber stopper is integrally formed with a block-shaped rubber restraint portion continuously on the lower surface of the stopper main body, while the bracket has a bottomed recessed recess having a shape corresponding to the restraint portion. Provided in a form that is recessed from the support surface, so that the fitting recess is filled with the fitting portion by fitting the restraining portion into the fitting recess,
Further, the insertion shaft portion protrudes from the lower surface of the restraining portion, and the insertion hole is provided in the bottom portion of the fitting recess, and the bottom portion is elastically clamped from both the front and back sides by the restraining portion and the hooking portion. A rubber stopper assembling structure, wherein the rubber stopper is assembled to the bracket in a state of being caused to move.   The rubber stopper according to claim 1, wherein the rubber stopper is a hole that penetrates the stopper main body and the restraining portion in the thickness direction and reaches the inside of the insertion shaft portion. An inner hole for inserting a push pin for applying a downward force to the insertion shaft portion is provided therein, and the inner hole is a neck portion between the latching portion and the restraining portion in the insertion shaft portion. A rubber stopper assembling structure characterized in that the rubber stopper is provided at a depth that passes through and reaches the inner position of the latching portion.   In Claim 2, The said latching | locking part has a largest diameter part in the intermediate part of an axial direction, The surface of the root side of the said insertion shaft part rather than this largest diameter part, and the front end side of this insertion shaft part The rubber stopper assembly structure is characterized in that both of the surfaces are inclined in directions opposite to each other toward the maximum diameter portion, and the hook portion has a mountain shape in cross section.   In Claim 3, the angle θ formed by the surface on the root side of the insertion shaft portion with respect to the direction perpendicular to the axis from the maximum diameter portion is larger than 0 ° and smaller than 90 °. The rubber stopper assembly structure characterized by

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