JP2019027459A - Vibration control mount - Google Patents

Abstract

To provide a vibration control mount which prevents deterioration of the appearance and stress concentration caused by molding shrinkage while maintaining stopper effect of a stopper member.SOLUTION: A vibration control mount is provided with: an inner cylinder 11 fixed to the cabin side; an attachment plate 12 fixed to the chassis side; a rubber part 13 which couples the inner cylinder 11 to the attachment plate 12; and multiple stopper pins 14 which protrude at positions in the attachment plate 12, which are located at the radial outer side of the inner cylinder 11 and separated from each other in a circumferential direction, and restrict relative displacement between a cabin 1 and a chassis 2. Stopper parts 15 which cover the stopper pins 14 are provided at the rubber part 13. A recessed part 16 is formed between the stopper parts 15 when viewed in an axial direction of the inner cylinder 11.SELECTED DRAWING: Figure 1B

Description

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

  2. Description of the Related Art Conventionally, for example, a tractor driver's cab is supported on a chassis side via an anti-vibration mount having an elastic body. And since it is conveyed in the state which fixed the tractor during conveyance, it is conveyed in the state which applied the load to the elastic body, and it is easy to produce a sag in an elastic body.

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

Japanese Utility Model Publication No. 63-37538

  However, as shown in FIG. 4A and FIG. 4B, for example, in the conventional vibration-proof mount 210, when the stopper pin 214 is insert-molded, the degree of sink due to molding contraction of the rubber portion 213 differs depending on the location. 4A is indicated by hatching), and not only the appearance is deteriorated, but also stress concentration is likely to occur around the stopper pin 214.

  The present invention has been made in view of such a point, and an object thereof is to prevent deterioration in 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, an inner cylinder fixed to the first member side;
A mounting plate fixed to the second member side;
An elastic body connecting the inner cylinder and the mounting plate;
A plurality of stopper members projecting at positions spaced apart from each other in the circumferential direction on the radially outer side of the inner cylinder in the mounting plate and restricting 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, the entire circumference of the inner cylinder including the stopper member is not uniformly covered with the elastic body like the anti-vibration rubber of Patent Document 1, but only the periphery of the stopper member is covered with the elastic body to stop the stopper. Since the recesses are formed between the stoppers and the elastic body is cut off, it is less susceptible to molding shrinkage. For this reason, the external appearance does not deteriorate and unintended stress concentration is difficult to stand.

In the second invention, in the first invention,
A fixing portion for fixing the mounting plate 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 said structure, since the fixing | fixed parts, such as the bolt insertion hole for attaching to the 2nd member side, were provided in the space formed between the stopper parts, the magnitude | size of the anti-vibration mount becomes small.

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

  According to said structure, the vibration-proof mount which is easy to provide four stopper members and four fixing | fixed part equally, and is easy to use compactly is 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 includes 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, the stopper inelastic portion for earning the volume of the elastic body is provided in the space formed between the stopper portions, and the recess is formed between the stopper inelastic portion and the stopper portion. While ensuring the characteristics of the above, it is less susceptible to molding shrinkage. For this reason, the external appearance does not deteriorate and unintended stress concentration is difficult to stand.

In a fifth invention, in any one of the first to fourth inventions,
The stopper member is formed of a stopper pin, and is joined by caulking in a state where a tip end portion of the stopper pin is passed through a through hole provided in the mounting plate.

  According to said structure, it is easy to change the height of a stopper pin, and fixing is easy, and a separate material can be selected with a mounting plate and a stopper pin.

  As described above, according to the present invention, the recess is formed between the stopper portions that cover the stopper member in the elastic body, thereby preventing the elastic body from continuing and forming the stopper member while maintaining the stopper effect of the stopper member. Appearance deterioration and stress concentration due to shrinkage can be prevented.

It is a perspective view which shows the vibration proof mount which concerns on embodiment of this invention. It is a top view which shows the vibration proof mount which concerns on embodiment of this invention. It is a bottom view which shows the vibration proof mount which concerns on embodiment of this invention. It is a front view which shows the vibration proof mount which concerns on embodiment of this invention. It is the IE-IE sectional view taken on the line of FIG. 1B. It is a side view which shows the state which attached the vibration proof mount to the tractor. It is a front view which shows the state which attached the vibration proof mount to the tractor. It is a top view which shows the vibration proof mount which concerns on the modification of embodiment of this invention. It is the IIIB-IIIB sectional view taken on the line of FIG. 3A. It is a side view which judges and shows a state in which the vibration proof mount was attached to the tractor. It is a top view which shows the vibration isolating mount which the sink mark which concerns on a prior art produced. It is a front view which shows the vibration proof mount which the sink mark which concerns on a prior art produced. It is a perspective view which shows the vibration proof 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, for example, between 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 that is fixed to the cabin 1 side. Although this inner cylinder 11 consists of a round pipe, for example, the shape is not specifically limited.

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

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

  Further, stopper pins 14 as, for example, four stopper members protrude from the mounting plate 12 at positions separated from each other in the circumferential direction on the radially outer side of the inner cylinder 11. The stopper pin 14 plays a role of regulating 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, the height, and the material are not limited thereto. The stopper pin 14 only needs to be higher in rigidity than the rubber portion 13, and may be made of the same material as the mounting plate 12, for example.

  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 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 the bottom thereof has a diameter D2 smaller than the diameter D1 of the circle passing through the stopper pin 14 in a plan view (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 assumed to be lower than the height h of the stopper pin 14 (t <h). About the outer periphery of this thin part 16a, it may be continued with the outer periphery of the stopper part 15, and even when the stopper pin 14 is actuated, no load is applied, so the durability is not affected. Therefore, for example, a concave portion 16 ′ in which the thickness of the thin portion 16 a ′ is increased to some extent as in the vibration proof mount 10 ′ shown in FIG. 5 is also included in the present invention.

  As described above, the mounting plate 12 is provided with the bolt insertion hole 12b as a fixing portion for fixing to the chassis 2 side in the concave portion 16 between the stopper portions 15 adjacent to each other when viewed from the axial direction of the inner cylinder 11. Yes. 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, respectively. However, the present invention is not limited to this. .

  As shown in FIG. 1E, the stopper pin 14 is caulked and coupled in a state where the tip end portion 14 a of the stopper pin 14 is passed through a through hole 12 c 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 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 12 b of the mounting plate 12 and fastening the second nut 6.

  As a result, vibration during traveling from the chassis 2 side is not easily transmitted to the cabin 1 side. When the tractor is fixed to a truck or the like during transportation, the stopper pin 14 contacts the cabin 1 side and the rubber portion 13 is not further deformed, so that the rubber portion 13 is unlikely to sag.

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

  Moreover, in this embodiment, since the fixing | fixed part which consists of the bolt insertion hole 12b for attaching to the chassis 2 side was provided in the space formed between the stopper parts 15, the magnitude | size of the anti-vibration mount 10 whole can be made small.

  Moreover, in this embodiment, the four anti-vibration mounts 10 which are easy to provide the four stopper pins 14 and the four bolt insertion holes 12b equally and are easy to use can be obtained.

  Further, in this 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 vibration isolating mount 10 according to the present embodiment, the rubber portion 13 is continuous by providing the rubber portion 13 with the stopper portion 15 that covers the stopper pin 14 and forming the recess 16 between the stopper portions 15. 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-
3A and 3B show an anti-vibration mount 10 according to a modification of the embodiment of the present invention, which is different from the above-described embodiment in that a rubber non-elastic portion 115 is provided on a rubber portion 113. FIG. In addition, in this modification, the same code | symbol is attached | subjected about the same part as FIG. 1A-FIG. 2B, and the detailed description is abbreviate | omitted.

  In this modification, the stopper inelastic part 115 is provided in the recessed part 16 in the above embodiment. The stopper inelastic portion 115 is not provided with the stopper pin 14 and gains the volume of the rubber portion 13 to ensure spring characteristics. On both sides of the stopper inelastic portion 115, a recess 116 smaller than the recess 16 of the above embodiment is formed. In this modification, the mounting plate 112 is not provided with the bolt insertion hole 12b, but may be provided as appropriate.

  In this modification, as shown in FIG. 3C, the pair of anti-vibration mounts 110 is configured by the first bolt 3 and the first nut 4 so as to sandwich the second member 102 between the pair of first members 101. Used as if pinched. Thereby, vibration transmission is reduced between the first member 101 and the second member 102.

  In this modification, while maintaining the necessary spring characteristics, the recess 116 is secured between the stopper inelastic portion 115 and the stopper portion 15 to prevent the rubber portion 113 from continuing, and the appearance due to molding shrinkage can be reduced. Deterioration and stress concentration can be prevented.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above-described embodiment, an example in which the stopper pin 14 is caulked to the mounting plate 12 as a stopper member has been described, but a bolt may be caulked or a bolt may be welded.

  Moreover, although the case where the four stopper pins 14 were provided was demonstrated in the said embodiment, you may provide three or five or more. Also in this case, it is only necessary to provide at least a concave portion so that the stopper portions 15 and 115 do not continue.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

1 cabin (first member)
2 chassis (second member)
3 First bolt
4 First nut
5 Second bolt
6 Second nut
10,10 'anti-vibration 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 part
16 recess
16a, 16a ′ Thin portion 101 First member 102 Second member 110 Anti-vibration mount 112 Mounting plate 113 Rubber portion 115 Stopper inelastic portion 116 Recess 210 Anti-vibration mount (prior art)
213 Rubber part (conventional technology)
213 'sink (prior art)
214 Stopper pin (prior art)

Claims (5)

An inner cylinder fixed to the first member side;
A mounting plate fixed to the second member side;
An elastic body connecting the inner cylinder and the mounting plate;
A plurality of stopper members projecting at positions spaced apart from each other in the circumferential direction on the radially outer side of the inner cylinder in the mounting plate and restricting relative displacement of the first member and the second member;
The anti-vibration mount according to claim 1, wherein 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 vibration-proof mount according to claim 1,
An anti-vibration mount characterized in that a fixing portion for fixing to the second member side is provided in a concave portion between the stopper portions adjacent to each other when viewed from the axial direction of the inner cylinder in the mounting plate. The anti-vibration mount according to claim 2,
In the mounting plate, four stopper members are provided at equal intervals in the circumferential direction, and the fixing portions are provided between the four stopper portions, respectively. mount. The vibration-proof mount according to claim 1,
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 includes the stopper An anti-vibration mount characterized in that no member is provided and a recess is formed between the stopper inelastic portion and the stopper portion. In the vibration-proof mount as described in any one of Claim 1 to 4,
The anti-vibration mount according to claim 1, wherein the stopper member is formed of a stopper pin, and is joined by caulking in a state where a tip end portion of the stopper pin is passed through a through hole provided in the mounting plate.

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