JPH0124444Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical classification/field> The disclosed technology belongs to the field of structural technology for a mount that is interposed when an engine is mounted in the engine room of an automobile.

〈Explanation of the gist〉 Therefore, when installing an engine in the engine room of a car, this invention is designed to be installed between the lower plate, which is attached to the chassis side via an insulator, and the upper plate, which is attached to the engine side via a bracket. A vibration isolating rubber having a modulus of elasticity is vulcanized and fixed, and a stud that is welded and fixed to the lower plate and extended loosely inserts inside the vibration isolating rubber and connects the above-mentioned upper plate and the upper plate. This invention relates to a vibration isolating rubber device in which a stopper sheet integrated through a vulcanization process is loosely inserted, and a flange-like stopper is provided at the upper end of the stopper sheet to regulate the stroke of large deformations. , the above-mentioned stopper plate and the stopper sheet integrated therewith are formed in a concave shape in the part where the above-mentioned stud is loosely inserted, and on the other hand, the lower edge of the above-mentioned stopper or the entire lower side thereof is a curved surface. This invention relates to a vibration isolating rubber device that is formed to ensure that the stopper comes into contact with the stopper sheet.

<Prior Art> As is well known, it is known that when an automobile engine is rigidly attached to a rubber vibration isolator, it is not preferable due to the relative vibration between the engine and the body of the vibration isolator.

The relative vibrations include low-frequency vibrations when starting the engine, idling vibrations during normal driving, and even so-called engine shake during normal driving.

In addition, there are noises such as unpleasant muffled sounds or transmitted sounds that occur inside the vehicle during high-speed driving.

However, since the above-mentioned low-frequency, medium-frequency, and high-frequency vibrations have different characteristics, it is difficult to eliminate them using all vibration isolators. It is designed to be adaptively attenuated and absorbed.

For example, in a front-engine, front-drive type automobile, as shown in FIG. 1, the engine 1 is mounted on a center member 2 and a side member 3 using engine vibration isolating rubber, and a so-called anti-vibration type engine mount 3 is mounted on a center member 2 and a side member 3. It is designed to be mounted and attached via 4.

Although there are various types of vibration isolating mounts 3, vibration isolating rubber device types are generally widely used because they can withstand severe vibrations, are easy to maintain and inspect, and have good serviceability. has been done.

As shown in FIG. 3, the vibration isolating rubber device 3 is usually interposed between the insulator 5 of the chassis and the bracket 6 on the side of the engine 1, so that the engine 1 is mounted diagonally upward in a vibration-proof manner. .

As shown in FIG. 2, the vibration isolating rubber device 3 generally has a bolt hole 9 for mounting the engine on the upper part thereof, at a set distance from a lower plate 8 to which a bracket 7 for the insulator 5 is welded. A top plate 10 is provided, and between the lower plate 8 and the top plate 10, a pair of rectangular anti-vibration rubbers 11 are fixed downwardly.

A circular loose insertion hole 13 with a set diameter is bored inside the inner vibration isolating rubber 12 that is provided integrally with the upper plate 10, and is fixed to the lower plate 8 by welding 14. A stud 15 is loosely inserted in an upwardly extending position, and the stud 15 is integrated with the inner vibration isolating rubber 12 and is attached to a rubber stopper sheet 16 attached on the upper plate 10.
Loosely insert the nut 1 into the upper end of the loose insertion hole 13'.
A flange-like stopper 18 is provided through 7.

In the omnidirectional type anti-vibration rubber device 3, high-frequency vibrations during high-speed running are absorbed by the anti-vibration rubber,
Further, the vibration isolating rubber 11 is designed to sufficiently absorb vibrations during normal medium-speed and low-speed running.

Therefore, in the event of low frequency vibrations with large amplitudes such as when driving on a rough road or sudden stop of the engine 1, the engine 1
Relative vibration between the shaft and the chassis of the vehicle may cause large deformation that deviates from the permissible stroke.

Therefore, for large deformations in the left and right direction, the stud 1
It comes into contact with the loose insertion hole 13 of the vibration isolating rubber 12 of the automobile No. 5, and is regulated and restrained.

In addition, in FIG. 2, the large upward displacement of the upper plate 10 corresponds to the inner vibration isolating rubber 1 of the lower plate
Regulated restraint is achieved by contacting the bottom of 2, and
The large downward displacement is absorbed by the stopper 18 being brought into contact with the stopper seat 16.

In this case, the contact of the lower plate 8 with the bottom surface of the inner vibration isolating rubber 12 is a full surface contact, so fatigue or shear failure of the inner vibration isolating rubber 12 does not easily occur, but the flange-shaped stopper Although the contact of the stopper sheet 18 with respect to the stopper sheet 16 is a surface contact, the peripheral edge thereof is in line contact in a flange shape. Therefore, when this is repeated, the stopper sheet 1
There is a drawback that local fatigue occurs in the abutting portion of the stopper 6, which may cause the stopper 18 to wear unevenly such that the stopper 18 contacts the top plate 10 unevenly, and a stopper noise may be generated.

Therefore, the lifespan of the vibration isolating rubber device 3 is short, it is inferior in durability, and must be replaced frequently, which not only causes problems that make the work extremely difficult, but also causes problems that result in high costs. There were also advantages.

<Purpose of the invention> The purpose of this invention is to solve the problem of large displacement restraint of the stopper and stopper sheet of the vibration isolating rubber device based on the above-mentioned conventional technology.
In addition to being able to damp and absorb high-frequency vibrations, it also improves durability while maintaining its large displacement restraint function, and allows the restraint function to work reliably, making it suitable for use in the field of vibration application in the automobile industry. The purpose of the present invention is to provide an excellent anti-vibration rubber device that will benefit the user.

<Structure of the invention> In accordance with the above-mentioned purpose, the structure of this invention, which is based on the above-mentioned claims for utility model registration, is to solve the above-mentioned problems by attaching the lower plate of the anti-vibration rubber device to the chassis side via a bracket. Also, the engine is attached and fixed to the upper plate via a bracket, and high frequency vibrations are absorbed by the vibration isolating rubber between the lower plate and upper plate when the car is running, and low frequency vibrations or Medium frequency vibrations are also absorbed by the vibration isolating rubber, and at this time, the stud extending integrally from the vehicle vibrates three-dimensionally against the loose insertion hole of the vibration isolating rubber inside the vibration isolating rubber, and When driving on rough roads, the shank of the stud comes into contact with the loose insertion hole of the inner vibration isolator to restrain and absorb large lateral displacement, and the inner vibration isolator absorbs large lateral displacement when driving on rough roads. The lower plate comes into contact with the rubber bottom surface to absorb restraint, and the large downward displacement is caused by the upper plate forming a concave portion on the lower side at the stud insertion part, and following this, the upper plate also has a concave shape on the upper surface. The lower curved surface of the stopper formed in the shape of a flange at the upper end of the stud that loosely inserts these into the stopper sheet attached to the stopper sheet is guided by the concave part of the stopper sheet, and its movement is reliably captured and accurately It makes it possible to restrain and absorb large displacements by contacting linearly or facetly, reducing the pressing force on the stopper sheet, improving the durability of the stopper sheet, and reducing stopper noise and stopper noise. Technical measures have been taken to prevent uneven wear.

<Embodiment - Configuration> Next, an embodiment of this invention will be described as follows based on the drawings from FIG. 4 onwards. Furthermore, the first
3. Components having the same features as those in FIGS.

In the embodiment shown in FIGS. 4, 5, and 6, 3' is a rectangular omni-directional anti-vibration rubber device that forms the gist of this invention, and a lower plate is attached to the mounting bracket 7 on the chassis side by welding. A pair of anti-vibration rubbers 11, 11 with set elastic coefficients are vulcanized and fixedly erected at both ends of the lower plate 8, and a weld 1 is attached to the center of the lower plate 8.
4, a stud 15 is erected at a set height.

Reference numeral 10 denotes an upper plate for mounting the engine, and bolt holes 9, 9 for the bracket for mounting the engine are bored at both ends of the upper plate, and the insertion portion of the stud loosely inserts into the upper plate. A concave portion 19 having a set depth is formed in the longitudinal direction of the plate 10, and the edge of the concave portion 19 with respect to the loose insertion hole 13 of the stud 15 is formed as a downwardly extending portion 20.

The atsupah plate 10 is integrally stuffed with the inner vibration isolating rubber 12 which is integrally molded with the vibration isolating rubbers 11, 11.
is similarly vulcanized and fixed to its upper end.

Therefore, the upper surface of the inner vibration isolating rubber 12 is similarly formed in a concave shape with respect to the stud 15 of the upper plate 10 to form a stopper sheet 16', and the upper surface of the inner vibration isolating rubber 12 is not inserted into the shank of the stud 15. A hole 13 is formed.

Reference numeral 18' denotes a stopper, which is fastened and fixed to the upper end of the stud 15 with a nut 17. In the normal assembled state, the stopper is fitted at a position spaced apart from the stopper sheet 16' by a set distance, and the lower edge of the plate-shaped The portion is formed into a curved surface.

<Embodiment - Effect> In the above configuration, the vibration isolating rubber device 3' is attached to the chassis of the engine room via the bracket,
When an engine is mounted on the atsupah plate 10 via a bracket and the automobile is operated, high-frequency vibrations during high-speed driving etc. are absorbed by the vibration isolating rubbers 11, 11.
Also, low frequency vibrations and medium frequency vibrations at low and medium speeds are similarly absorbed by the damping function of the vibration isolating rubbers 11, 11.

Therefore, for vibrations within a set range, the vibration isolating rubber device 3' absorbs vibrations in all directions.

In this case, the stud 15 is the inner vibration isolating rubber 12.
Freely and relatively vibrate three-dimensionally within the loose insertion hole 13 inside.

Therefore, when a large displacement that exceeds the set range occurs when starting or stopping the engine, or when driving on a rough road, the shank of the stud 15 is caused by the inner vibration isolating rubber 12 in response to a large lateral displacement. The lower plate 8 comes into contact with the inner wall surface of the inner vibration isolating rubber 12 to restrain and absorb it, and in the case of a large upward displacement, the lower plate 8 comes into surface contact with the bottom surface of the inner vibration isolating rubber 12, similarly restraining it.

Also, for large downward displacement, the stopper 18'
comes into contact with the stopper sheet 16' and restrains it.

In this case, since the stopper sheet 16' is formed in a concave portion, the movement of the stopper 18' is guided by the concave portion and is reliably captured. It does not slide on the inner wall surface of the rubber 12, and therefore no dragging phenomenon occurs on the inner vibration isolating rubber 12.

Furthermore, when the stopper 18' comes into contact with the stopper sheet 16', the elasticity of the stopper sheet 16' does not generate any stopper noise, and does not impede the quietness in the vehicle interior.

In addition, since the stopper sheet 16' is formed in a concave shape and the lower edge of the stopper 18' is formed into a curved surface, when the two come into contact, a small area of spot contact is achieved. The contact is made softly, and therefore, the stopper sheet 16' will not become fatigued and its durability will not deteriorate when the stopper 18' repeatedly contacts the stopper sheet 16' due to large downward displacement.

As a result, the stopper sheet 16' may peel off, the upper plate 10 may be exposed due to the peeling, and the stopper 18' may come into partial contact with the exposed portion, causing uneven wear of the stopper 18'. , there is no stopping sound.

In the above-mentioned embodiment, since a concave portion 19 is formed in the longitudinal direction at the insertion portion of the loose insertion hole 13 of the stud 15 of the top plate 10, when a large downward displacement occurs, the stopper 18' The part of the stopper plate 10' that contacts the stopper plate 16' comes into contact with the stopper plate 10' in spots on both sides in the longitudinal direction as shown in FIG. 5, but as shown in the embodiment shown in FIG. 15, the recessed portion 19' is formed in a spherical shape concentrically with the stud 15, and the recessed portion of the stopper sheet 16'' disposed above this is also formed in a spherical shape. Also, by forming the stopper 18'' in a hemispherical shape on the entire surface under the stopper 18'', the contact with the stopper sheet 16'' during the downward large displacement is in a manner in which the entire surface is in contact with the stopper sheet 16'' as much as possible. The pressure can be reduced, and the fatigue of the surface contact part or the line contact part can be reduced, and the above-mentioned stopper noise, separation of the stopper sheet 16'', uneven contact of the stopper 18'', etc. can be more reliably prevented. You can.

<Other Embodiments> It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments, and various embodiments may be employed, such as interposing an elastic cushion as appropriate between the stopper and the nut. It is possible.

Furthermore, it goes without saying that the vibration isolating rubber device is not limited to the rectangular type as in each of the above-mentioned embodiments.

<Effects of the invention> According to this invention, a vibration isolating rubber is interposed between the lower plate and the upper plate, and the stud fixedly extended from the lower plate loosely inserts the upper plate between the two. In a vibration isolating rubber device in which a stopper at the upper end abuts against a stopper sheet provided above the top plate to restrain large downward displacement, the stud insertion portion of the top plate is formed into a concave portion, and The integrated stopper sheet is also formed into a concave shape, and the corresponding stopper is formed into a curved surface at least at its lower edge, so that its abutting surface linearly abuts on the periphery of the stopper's flange as in the past. Therefore, when the stopper sheet is restrained by repeated large downward displacements, the abutting portion of the stopper sheet becomes fatigued and does not peel off, reducing its durability, or the stopper becomes detached from the upper plate. It has an excellent effect of not causing a stop noise or abnormal wear due to contact, and therefore has an excellent effect of extending its life and not requiring frequent replacement. .

Also, at the time of the large downward displacement, the Atsupa plate,
Furthermore, since the stopper sheet is formed in a concave portion at the insertion portion of the stud, when the stopper descends during the large downward displacement, the concave portion of the stopper sheet can reliably catch and guide the downward movement of the stopper. Therefore, during this process, the stud does not slide on the inner wall surface of the inner vibration isolating rubber, and therefore does not damage the inner vibration isolating rubber, thereby preventing lateral displacement. Excellent effects can also be achieved without any loss of functionality.

In addition, the structure requires only that the bottom of the stopper be formed into a curved surface, and as for the top plate, it is sufficient to form the part where the stud is inserted into a concave portion, so it does not require much man-hours and costs are high. It has the advantage that there is no risk of it becoming a problem.

[Brief explanation of the drawing]

Fig. 1 is a plan view illustrating the arrangement of the anti-vibration rubber device with respect to the engine, Fig. 2 is a partial cross-sectional front view of the anti-vibration rubber device based on the conventional technology, Fig. 3 is a side view as seen from Fig. 2, and Fig. 4 et seq. 4 is an explanatory view of an embodiment of this invention, and FIG. 4 is a partially sectional front view of one embodiment, and FIG.
6 is a plan view of the same, FIG. 6 is a perspective view, and FIG. 7 is a perspective view of another embodiment corresponding to FIG. 6. 8...Lower plate, 1...Engine, 11...
...Vibration-proof rubber, 15...Stud, 16', 16''...
...Stoppa sheet, 18', 18'...Stoppa,
3', 3''...Vibration isolation rubber device, 13...Free insertion hole, 1
9, 19'... Concave portion.

Claims (1)

[Scope of utility model registration request] A vibration isolating rubber is fixed between the lower plate facing the chassis side and the upper plate facing the engine side, and a stud fixed to the lower plate and extending loosely inserts the vibration isolating rubber and also connects the upper plate to the upper plate. In a vibration isolating rubber device in which a stopper sheet provided above a top plate is loosely inserted and a flange-like stopper is provided above the stopper sheet, the top plate and the stopper sheet have a stud insertion portion formed in a concave portion, and one side of the stopper A vibration isolating rubber device characterized in that at least the lower edge is formed into a curved surface.