JP6914765B2 - Anti-vibration mount - Google Patents

Description

The present invention relates to an anti-vibration mount including a stopper member.

Conventionally, for example, a tractor driver's cab is known to be supported on the chassis side via a vibration-proof mount having an elastic body. Then, since the tractor is transported in a fixed state during transportation, the tractor is transported in a state where a load is applied to the elastic body, and the elastic body tends to be settled.

Therefore, for example, as in Patent Document 1, in each of the anti-vibration rubbers on the bound side and the rebound side, stopper pins having a higher rigidity than the anti-vibration rubber are built in the outer peripheral rubber portions thereof, and these stopper pins are used as an outer cylinder. Anti-vibration mounts fixed to are known. The stopper pin prevents excessive deformation of the rubber portion due to a large impact or vibration.

Jikken Sho 63-37538 Gazette

However, for example, as shown in FIGS. 4A and 4B, in the conventional anti-vibration mount 210, when the stopper pin 214 is insert-molded, the degree of sink mark due to the molding shrinkage of the rubber portion 213 differs depending on the location, and the sink mark 213'(FIG. (Indicated by hatching in 4A) occurs, and not only the appearance is deteriorated, but also there is a problem that stress concentration is likely to occur around the stopper pin 214.

The present invention has been made in view of this point, and an object of the present invention is to prevent deterioration of appearance and stress concentration due to molding shrinkage while maintaining the stopper effect of the stopper pin.

In order to achieve the above object, in the present invention, a recess for separating the stopper portions is provided between the stopper portions covering the stopper member in the elastic body.

Specifically, in the first invention, the inner cylinder fixed to the first member side and
The mounting plate fixed to the second member side,
An elastic body that connects the inner cylinder and the mounting plate,
A plurality of stopper members are provided on the mounting plate so as to project from each other in the radial outer circumferential direction of the inner cylinder and regulate the relative displacement of the first member and the second member.
The elastic body has a stopper portion that covers the stopper member, and a recess is formed between the stopper portions when viewed from the axial direction of the inner cylinder.

According to the above configuration, unlike the anti-vibration rubber of Patent Document 1, the entire circumference of the inner cylinder including the stopper member is not uniformly covered with the elastic body, but only the circumference of the stopper member is covered with the elastic body to prevent the stopper. As a portion, a recess is formed between the stopper portions to separate the elastic body, so that the elastic body is not easily affected by the molding shrinkage. Therefore, the appearance does not deteriorate and unintended stress concentration is unlikely to occur.

In the second invention, in the first invention,
In the mounting plate, a fixing portion for fixing to the second member side is provided in a recess between the stopper portions adjacent to each other when viewed from the axial direction of the inner cylinder.

According to the above configuration, since a fixing portion such as a bolt insertion hole for attaching to the second member side is provided in the space created between the stopper portions, the size of the entire anti-vibration mount is reduced.

In the third invention, in the second invention,
The four stopper members are provided on the mounting plate at equal intervals in the circumferential direction, and the fixing portions are provided between the four stopper portions.

According to the above configuration, the four stopper members and the four fixing portions can be easily provided evenly, and a compact and easy-to-use anti-vibration mount can be obtained.

In the fourth invention, in the first invention,
The elastic body has a stopper inelastic portion that secures the volume of the elastic body in a recess between the stopper portions adjacent to each other when viewed from the axial direction of the inner cylinder, and the stopper inelastic portion has the stopper. No member is provided, and a recess is formed between the stopper inelastic portion and the stopper portion.

According to the above configuration, a stopper inelastic portion for increasing the volume of the elastic body is provided in the space created between the stopper portions, and a recess is formed between the stopper inelastic portion and the stopper portion, so that a desired elastic body is formed. While ensuring the characteristics of, it is not easily affected by molding shrinkage. Therefore, the appearance does not deteriorate and unintended stress concentration is unlikely to occur.

In the fifth invention, in any one of the first to fourth inventions,
The stopper member is composed of a stopper pin, and is caulked and coupled with the tip of the stopper pin passed through a through hole provided in the mounting plate.

According to the above configuration, the height of the stopper pin can be easily changed and fixed, and different materials can be selected for the mounting plate and the stopper pin.

As described above, according to the present invention, by forming a recess in the elastic body between the stopper portions covering the stopper member, the elastic body is prevented from being continuous, and molding is performed while maintaining the stopper effect of the stopper member. It is possible to prevent deterioration of appearance and stress concentration due to shrinkage.

It is a perspective view which shows the anti-vibration mount which concerns on embodiment of this invention. It is a top view which shows the anti-vibration mount which concerns on embodiment of this invention. It is a bottom view which shows the anti-vibration mount which concerns on embodiment of this invention. It is a front view which shows the anti-vibration mount which concerns on embodiment of this invention. FIG. 1B is a cross-sectional view taken along the line IE-IE of FIG. 1B. It is a side view which shows the state which the anti-vibration mount is attached to a tractor. It is a front view which shows the state which attached the anti-vibration mount to a tractor. It is a top view which shows the anti-vibration mount which concerns on the modification of embodiment of this invention. FIG. 3A is a cross-sectional view taken along the line IIIB-IIIB of FIG. 3A. It is a side view which shows the state which the anti-vibration mount is attached to a tractor by partially judging. It is a top view which shows the anti-vibration mount which caused the sink mark which concerns on the prior art. It is a front view which shows the anti-vibration mount which caused the sink mark which concerns on the prior art. It is a perspective view which shows the anti-vibration mount which concerns on the modification of embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

2A and 2B show a state in which the anti-vibration mount 10 according to the embodiment of the present invention is provided between, for example, the cabin 1 as the first member of the tractor and the chassis 2 as the second member.

As shown in FIGS. 1A to 1E, the anti-vibration mount 10 includes, for example, a cylindrical inner cylinder 11 fixed to the cabin 1 side. The inner cylinder 11 is made of, for example, a round pipe, but its shape is not particularly limited.

The anti-vibration mount 10 includes a mounting plate 12 fixed to the chassis 2 side, and the mounting plate 12 has an outer diameter larger than the outer diameter of the inner cylinder 11 in the center, as shown in FIG. 1E, for example. It is composed of a square plate member having a portion 12a and having rounded corners. A bolt insertion hole 12b is formed in the square as a fixing portion for fixing to the chassis 2. The mounting plate 12 is made of, for example, a press-molded product of a steel plate such as an SPHC material having a plate thickness of 4.5 mm, but the plate thickness, material, and the like are not limited thereto.

A rubber portion 13 as an elastic body connects the inner cylinder 11 and the mounting plate 12. The rubber portion 13 is made of, for example, synthetic rubber such as natural rubber (NR), NBR, polyurethane rubber, and SBR.

Further, for example, four stopper pins 14 as stopper members are provided so as to project from the mounting plate 12 at positions separated from each other in the circumferential direction on the outer side in the radial direction of the inner cylinder 11. The stopper pin 14 serves to regulate the relative displacement between the cabin 1 and the chassis 2. The stopper pin 14 is composed of, for example, an S45C pin having a diameter of 7 mm and a height of 17 mm, but the thickness, height, and material are not limited thereto. The stopper pin 14 may have at least a higher rigidity than the rubber portion 13, and may be made of the same material as the mounting plate 12, for example.

Further, the rubber portion 13 has a stopper portion 15 that covers the stopper pin 14 and bulges outward in the radial direction when viewed from the axial direction of the inner cylinder 11. The stopper portion 15 has a rectangular shape in a plan view, but may have an arcuate outer peripheral surface. The stopper portion 15 appears to bulge by providing the recess 16 between the stopper portions 15. That is, the rubber between the stopper portions 15 is not continuous due to the recess 16. As shown in FIG. 1B, the recess 16 is preferably formed so that its bottom portion has a diameter D2 smaller than the diameter D1 of a circle passing through the stopper pin 14 (D2 <D1). As shown in FIG. 1E, a thin portion 16a having a rubber thickness t (for example, 2 mm) may be present at the bottom of the recess 16 in a side view. The rubber thickness t is lower than the height h of the stopper pin 14 (t <h). The outer circumference of the thin portion 16a may be continuous with the outer circumference of the stopper portion 15, and no load is applied even when the stopper pin 14 acts, so that the durability is not affected. Therefore, for example, the recess 16'in which the thickness of the thin portion 16a' is increased to some extent, such as the anti-vibration mount 10'shown in FIG. 5, is also included in the present invention.

As described above, the mounting plate 12 is provided with a bolt insertion hole 12b as a fixing portion for fixing to the chassis 2 side in the recess 16 between the stopper portions 15 adjacent to each other when viewed from the axial direction of the inner cylinder 11. There is. In the present embodiment, the four stopper pins 14 are provided at equal intervals in the circumferential direction, and the bolt insertion holes 12b are provided between the four stopper portions 15, but the present invention is not limited to this. ..

As shown in FIG. 1E, the stopper pin 14 is caulked and connected in a state where the tip portion 14a of the stopper pin 14 is passed through the through hole 12c provided in the mounting plate 12. The stopper pin 14 may be provided on the mounting plate 12 by screw connection, welding, or the like, or may be provided integrally with the mounting plate 12.

As shown in FIGS. 2A and 2B, the anti-vibration mount 10 is attached to the cabin 1 side by passing the first bolt 3 through the inner cylinder 11 and fastening it with the first nut 4. Then, the mounting plate 12 is fixed to the chassis 2 side by inserting the second bolt 5 into the bolt insertion hole 12b of the mounting plate 12 and fastening the second nut 6.

As a result, vibrations such as when traveling from the chassis 2 side are less likely to be transmitted to the cabin 1 side. When the tractor is fixed to a truck or the like during transportation, the stopper pin 14 comes into contact with the cabin 1 side and the rubber portion 13 is not further deformed, so that the rubber portion 13 is less likely to be settled.

As described above, in the present embodiment, unlike the anti-vibration rubber of Patent Document 1, the entire circumference of the inner cylinder 11 including the stopper pin 14 is not uniformly covered with the rubber portion 13, but the stopper pin 14 is used. Since only the periphery is covered with the rubber portion 13 to form the stopper portion 15 and the rubber portion 13 is separated between the stopper portions 15, it is not easily affected by the molding shrinkage, the appearance does not deteriorate, and unintended stress concentration stands. Hateful.

Further, in the present embodiment, since the fixing portion including the bolt insertion hole 12b for mounting on the chassis 2 side is provided in the space formed between the stopper portions 15, the size of the entire anti-vibration mount 10 can be reduced.

Further, in the present embodiment, the four stopper pins 14 and the four bolt insertion holes 12b can be easily provided evenly, and a compact and easy-to-use anti-vibration mount 10 can be obtained.

Further, in the present embodiment, since the stopper pin 14 is caulked, the height of the stopper pin 14 can be easily changed and fixed, and different materials can be selected for the mounting plate 12 and the stopper pin 14.

Therefore, according to the anti-vibration mount 10 according to the present embodiment, the rubber portion 13 is provided with the stopper portion 15 that covers the stopper pin 14, and the recess 16 is formed between the stopper portions 15, so that the rubber portion 13 is continuous. It is possible to prevent deterioration of the appearance and stress concentration due to molding shrinkage while maintaining the stopper effect of the stopper pin 14.

-Modification example-
3A and 3B show a vibration-proof mount 10 according to a modified example of the embodiment of the present invention, which is different from the above embodiment in that the rubber portion 113 is provided with the stopper inelastic portion 115. In this modification, the same parts as those in FIGS. 1A to 2B are designated by the same reference numerals, and detailed description thereof will be omitted.

In this modification, the stopper inelastic portion 115 is provided in the portion of the recess 16 in the above embodiment. The stopper inelastic portion 115 is not provided with the stopper pin 14, and the volume of the rubber portion 13 is increased in order to secure the spring characteristics. Recesses 116 smaller than the recess 16 of the above embodiment are formed on both sides of the stopper inelastic portion 115. In this modification, the mounting plate 112 is not provided with the bolt insertion hole 12b, but it may be provided as appropriate.

In this modification, as shown in FIG. 3C, the pair of anti-vibration mounts 110 are formed by the first bolt 3 and the first nut 4 in a configuration in which the second member 102 is sandwiched between the pair of first members 101. It is used as if it is sandwiched. As a result, vibration transmission between the first member 101 and the second member 102 is reduced.

In this modification, the rubber portion 113 is prevented from being continuous by securing the recess 116 between the stopper inelastic portion 115 and the stopper portion 15 while maintaining the required spring characteristics, and the appearance due to molding shrinkage is obtained. Deterioration and stress concentration can be prevented.

(Other embodiments)
The present invention may have the following configuration with respect to the above embodiment.

That is, in the above embodiment, the stopper pin 14 is crimped to the mounting plate 12 as the stopper member, but the bolt may be crimped or the bolt may be welded.

Further, in the above embodiment, the case where the four stopper pins 14 are provided has been described, but three or five or more stopper pins may be provided. In this case as well, at least a recess may be provided so that the stopper portions 15 and 115 are not continuous.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and applications.

1 cabin (first member)
2 chassis (second member)
3 1st bolt
4 1st nut
5 2nd bolt
6 2nd nut
10,10'vibration-proof mount
11 Inner cylinder
12 Mounting plate
12a outer cylinder
12b Bolt insertion hole (fixed part)
12c through hole
13 Rubber part
14 Stopper pin (stopper member)
14a tip
15 Stopper
16 recess
16a, 16a'Thin wall part 101 1st member 102 2nd member 110 Anti-vibration mount 112 Mounting plate 113 Rubber part 115 Stopper inelastic part 116 Recessed 210 Anti-vibration mount (conventional technology)
213 Rubber part (conventional technology)
213'sink (previous technology)
214 Stopper pin (conventional technology)

Claims (5)

The inner cylinder fixed to the first member side and
The mounting plate fixed to the second member side,
An elastic body that connects the inner cylinder and the mounting plate,
A plurality of stopper members are provided on the mounting plate so as to project from each other in the radial outer circumferential direction of the inner cylinder and regulate the relative displacement of the first member and the second member.
The elastic body has an outer peripheral portion that covers the outer circumference of the inner cylinder and a plurality of stopper portions that extend radially from the outer peripheral portion and cover the stopper member, and are located between the stopper portions when viewed from the axial direction of the inner cylinder. Anti-vibration mount characterized by having a recess formed in the. The inner cylinder fixed to the first member side and
The mounting plate fixed to the second member side,
An elastic body that connects the inner cylinder and the mounting plate,
A plurality of stopper members are provided on the mounting plate so as to project from each other in the radial outer circumferential direction of the inner cylinder and regulate the relative displacement of the first member and the second member.
The elastic body has a stopper portion that covers the stopper member, and a recess is formed between the stopper portions when viewed from the axial direction of the inner cylinder.
A vibration-proof mount characterized in that a fixing portion for fixing to the second member side is provided in a recess between the stopper portions adjacent to the inner cylinder when viewed from the axial direction of the mounting plate. In the anti-vibration mount according to claim 2.
The mounting plate is provided with four stopper members at equal intervals in the circumferential direction, and the fixing portions are provided between the four stopper portions, respectively. mount. The inner cylinder fixed to the first member side and
The mounting plate fixed to the second member side,
An elastic body that connects the inner cylinder and the mounting plate,
A plurality of stopper members are provided on the mounting plate so as to project from each other in the radial outer circumferential direction of the inner cylinder and regulate the relative displacement of the first member and the second member.
The elastic body has a stopper portion that covers the stopper member, and a recess is formed between the stopper portions when viewed from the axial direction of the inner cylinder.
The elastic body has a stopper inelastic portion that secures the volume of the elastic body in a recess between the stopper portions adjacent to each other when viewed from the axial direction of the inner cylinder, and the stopper inelastic portion has the stopper. A vibration-proof mount characterized in that no member is provided and a recess is formed between the stopper inelastic portion and the stopper portion. The inner cylinder fixed to the first member side and
The mounting plate fixed to the second member side,
An elastic body that connects the inner cylinder and the mounting plate,
A plurality of stopper members are provided on the mounting plate so as to project from each other in the radial outer circumferential direction of the inner cylinder and regulate the relative displacement of the first member and the second member.
The elastic body has a stopper portion that covers the stopper member, and a recess is formed between the stopper portions when viewed from the axial direction of the inner cylinder.
The anti-vibration mount is characterized in that the stopper member is composed of a stopper pin and is caulked and coupled with the tip of the stopper pin passed through a through hole provided in the mounting plate.

Images