Body mount

Abstract

By using resin for the outer casing, a body mount with higher stopper rigidity is provided. [Solution] A body mount 1 comprises a resin outer cylinder member 2, an inner cylinder member 3 disposed within the hollow portion of the outer cylinder member 2, and a rubber elastic body 4 interposed between the outer cylinder member 2 and the inner cylinder member 3, wherein the outer cylinder member 3 is press-fitted and fixed into the insertion hole 5A of the holder 5. The outer cylinder member 2 has a cylindrical portion 2B that forms the outer circumferential surface, a recess 2C that is recessed radially inward from the cylindrical portion 2B, and a wall portion 2D that extends from the bottom portion 25 that forms the recess 2C toward the tip in the press-fitting direction and faces the radially inward side of the cylindrical portion 2B at a distance from it.

Description

Technical Field

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[0001] ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Therefore, the object of the present invention is to provide a body mount in which the outer cylinder member is made of resin and the rigidity of the stopper is higher. [Means for solving the problem]

[0007] To achieve the above objective, the present invention provides a body mount comprising a resin outer cylinder member, an inner cylinder member disposed within the hollow portion of the outer cylinder member, and an elastic body interposed between the outer cylinder member and the inner cylinder member, wherein the outer cylinder member is press-fitted and fixed into an insertion hole of a holder, characterized in that the outer cylinder member has a cylindrical portion forming an outer circumferential surface, a recess recessing radially inward from the cylindrical portion, and a wall portion extending toward the tip in the press-fitting direction from the portion forming the recess and facing the radially inward side of the cylindrical portion at a distance from each other. [Effects of the Invention]

[0008] According to the present invention, the rigidity of the stopper can be further increased by making the outer cylinder member out of resin. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view of the body mount according to the embodiment, seen from the rear end. [Figure 2] This is a perspective view of the body mount according to the embodiment, seen from the front end. [Figure 3] This is a side view of the body mount. [Figure 4] This is a longitudinal cross-sectional view showing the body mount pressed into the holder's insertion hole. [Figure 5] This is a perspective view of the outer cylinder member as seen from the rear end. [Figure 6] This is a perspective view of the outer cylinder member as seen from the tip side. [Figure 7] This is a cross-sectional view showing a modified example in which the wall portion protrudes from the cylindrical portion in the axial direction. [Figure 8] This is a cross-sectional view showing a modified example in which the wall portion is located inward from the bottom portion in the radial direction. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings. As shown in Figures 1 to 4, the body mount 1 according to this embodiment comprises an outer cylindrical member 2, an inner cylindrical member 3 coaxially arranged within the hollow portion of the outer cylindrical member 2, and a rubber elastic body 4 interposed between the outer cylindrical member 2 and the inner cylindrical member 3 to connect them.

[0011] The inner cylinder member 3 is a cylindrical metal member located in the center of the body mount 1. The inner cylinder member 3 has a hollow hole 3A that runs through it along the axial direction, and is fixed to the vehicle body side, such as the frame, via bolts inserted through the hollow hole 3A. Both axial ends of the inner cylinder member 3 protrude from both axial ends of the outer cylinder member 2.

[0012] As shown in Figures 4 to 6, the outer cylinder member 2 is a cylindrical member made of resin and is positioned radially outward from the inner cylinder member 3, spaced apart. The outer circumferential surface 2A of the outer cylinder member 2 is the part that is press-fitted into the insertion hole 5A of the holder 5 on the suspension member side.

[0013] As shown in Figures 1 to 3, the body mount 1 has a rubber elastic body 4 interposed between the outer cylinder member 2 and the inner cylinder member 3. In the press-fitting direction, a portion of this rubber elastic body 4 protrudes toward the tip of the outer cylinder member 2 and functions as a stopper 4A that abuts against the vehicle body when it is fixed to the vehicle body by a bolt inserted through the hollow hole 3A. In Figure 1, the lower side where the stopper 4A is located is the tip side when it enters the insertion hole during press-fitting into the holder on the suspension member side. In the following description, when referring to either end in the axial direction, the lower side in Figure 1 will be referred to as the tip side and the upper side as the rear end side.

[0014] The outer cylindrical member 2 is a resin molded product formed by injection molding. The outer cylindrical member 2 includes a cylindrical portion 2B that forms an outer peripheral surface 2A having a constant diameter dimension in the axial direction, a plurality of recesses 2C that are recessed radially inward from the outer peripheral surface 2A, a wall portion 2D that extends to the tip side from the portion forming the recesses 2C, and a flange portion 2E that is provided at the end on the rear end side of the cylindrical portion 2B and projects in the radially expanding direction to form an annular shape.

[0015] The recesses 2C are formed at positions away from both axial ends of the outer cylindrical member 2, and a plurality (six in this embodiment) are provided at two locations that are 180 degrees opposed to each other with the inner cylindrical member 3 interposed therebetween. The shapes of the six recesses 2C provided at the two locations are the same.

[0016] The six recesses 2C include opposing pieces 20 that project from the inner peripheral surface 2F of the cylindrical portion 2B toward the opposing side, two projecting pieces 21 that are provided on both sides in the circumferential direction with respect to the opposing pieces 20 at intervals from the opposing pieces 20 and project inside the cylindrical portion 2B, a tip piece 22 that connects the tip ends of the opposing pieces 20 and the two projecting pieces 21, a rear end piece 23 that connects the rear end portions of the opposing pieces 20 and the two projecting pieces 21, two circumferential pieces 24 that are arranged along the circumferential direction so as to divide the space between the tip piece 22 and the rear end piece 23 into approximately three equal parts and project inside the cylindrical portion 2B, and a bottom portion 25 that connects the inner ends of the two projecting pieces 21, the tip piece 22, and the rear end piece 23 to form an arcuate surface concentric with the cylindrical portion 2B. That is, six recesses 2C having a rib-like shape are formed in the region surrounded by the two projecting pieces 21, the tip piece 22, and the rear end piece 23, and are partitioned by the opposing pieces 20 and the two circumferential pieces 24 such that the outer peripheral side is open.

[0017] The wall portion 2D is connected to the bottom portion 25 and extends to the tip side, and is provided so as to face the inside of the cylindrical portion 2B at an interval. The wall portion 2D does not project from the tip of the cylindrical portion 2B in the axial direction, and the tip of the wall portion 2D is located on the rear end side of the tip of the outer cylindrical member 2 in the axial direction of the outer cylindrical member 2.

[0018] The rubber elastic body 4 is interposed between the outer cylinder member 2 and the inner cylinder member 3 in a state of being mounted on a molding die, and elastically connects the outer cylinder member 2 and the inner cylinder member 3. The rubber elastic body 4 is vulcanized and adhered to the inner peripheral surface 2F of the outer cylinder member 2 and the outer peripheral surface of the inner cylinder member 3 by injecting molten rubber between the outer cylinder member 2 and the inner cylinder member 3 and cooling it. At this time, the injected molten rubber is also supplied between the bottom portion 25 of the outer cylinder member 2 and the inner cylinder member 3, and into a recess provided on the tip side of the outer cylinder member 2 in the molding die to form the stopper 4A.

[0019] The molten rubber supplied to the recess of the molding die covers the tip of the wall portion 2D and forms the stopper 4A. As shown in FIG. 2, the formed stoppers 4A are provided at two locations with a circumferential interval, and are set to a size corresponding to the portion where the stopper 4A abuts on a vehicle body or the like to which the body mount 1 is attached.

[0020] As described above, according to the body mount 1 according to the present embodiment, the following operational effects can be achieved.

[0021] In the body mount 1 according to the present embodiment, since the outer cylinder member 2 has a concave portion 2C that is recessed radially inward, the distance between the concave portion 2C and the inner cylinder member 3 becomes narrower than the distance between the cylindrical portion 2B and the inner cylinder member 3, thereby increasing the rigidity of the rubber elastic body 4. Further, since the outer cylinder member 2 extends from the bottom portion 25 forming the concave portion 2C toward the tip side in the press-fitting direction and has a wall portion 2D that faces the inner side in the radial direction of the cylindrical portion 2B with a gap therebetween, the elastic deformation of the rubber elastic body 4 interposed between the wall portion 2D and the cylindrical portion 2B is suppressed, and the rigidity of the rubber elastic body 4 between the wall portion 2D narrowed by the wall portion 2D and the inner cylinder member 3 is also increased. Therefore, it is possible to increase the rigidity of the rubber elastic body 4 even on the tip side of the concave portion 2C.

[0022] Furthermore, by increasing the rigidity of the rubber elastic body 4 on the tip side of the recess 2C, it is possible to increase the rigidity of the stopper 4A which is provided protruding from the outer cylinder member 2 on the tip side. In addition, since the wall portion 2D is connected to the portion that forms the recess 2C, the difference in rigidity between the portion between the recess 2C and the inner cylinder member 3, where the gap is narrowed and rigidity is increased by the recess 2C, and the portion on the tip side of the recess 2C, where rigidity is increased by the wall portion 2D, becomes smaller. As a result, stress is less likely to concentrate on the tip side, making it possible to prevent damage to the tip side.

[0023] Furthermore, the wall portion 2D does not protrude from the tip of the cylindrical portion 2B in the axial direction, and its tip is positioned further back than the tip of the outer cylindrical member 2 in the axial direction of the outer cylindrical member 2. As a result, the groove formed by the opposing cylindrical portion 2B and wall portion 2D does not become too deep. Therefore, it becomes easier to ensure that the molten rubber injected during manufacturing flows all the way to the tip piece 22, and the cylindrical portion 2B and wall portion 2D can be reliably vulcanized and bonded to each other's opposing surfaces.

[0024] Furthermore, since the recess 2C and the wall portion 2D are located at positions 180 degrees opposite each other with the inner cylinder member 3 in between, for example, by assembling the body mount 1 in a direction where the recess 2C and the wall portion 2D face each other in the left-right direction of the automobile body, the highly rigid stopper 4A can provide stable vibration absorption performance without excessive deformation in response to left-right vibrations of the vehicle body.

[0025] In the above embodiment, an example was described in which the wall portion 2D is located on the rear end side of the outer cylindrical member 2 in the axial direction of the outer cylindrical member 2. However, as shown in Figure 7, the wall portion 2D may protrude from the tip of the cylindrical portion 2B in the axial direction, and the tip of the wall portion 2D may be located on the front end side of the outer cylindrical member 2 in the axial direction of the outer cylindrical member 2.

[0026] In this case, since the wall portion 2D protrudes from the tip of the outer cylinder member 2 in the axial direction of the outer cylinder member 2, it is possible to further increase the rigidity of the stopper 4A that is formed protruding from the tip of the outer cylinder member 2.

[0027] Furthermore, although the above embodiment describes an example in which the wall portion 2D is positioned at a location that extends axially from the bottom portion 25 forming the recess 2C, the invention is not limited to this. For example, as shown in Figure 8, the wall portion 2D may be located inside the bottom portion 25 in the radial direction of the cylindrical portion 2B.

[0028] In this case, the gap between the cylindrical portion 2B and the wall portion 2D widens, and the thickness of the rubber elastic material 4 filling the space between them increases. As a result, the portion that is less prone to elastic deformation becomes thicker, making it possible to further increase the rigidity of the stopper 4A formed on the tip side.

[0029] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. All technical matters included in the technical concept described in the claims are subject to the present invention. The embodiments described above are preferred examples, but those skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed herein, and these are included in the technical scope described in the appended claims.

[0030] For example, in the above embodiment, an example was described in which the wall portion 2D and the stopper 4A are provided at two locations in the circumferential direction. However, the invention is not limited to this, and the stopper 4A may be provided as appropriate in accordance with the location on the vehicle body to which the body mount 1 is attached, according to the area in which it contacts. [Explanation of symbols]

[0031] 1 Body Mount 2. Outer cylinder member 2A Outer surface 2B Cylindrical part 2C recess 2D wall 2E Flange section 2F Inner surface 3. Inner cylinder member 3A hollow hole 4. Rubber elastic body 4A Stopper 5 holders 5A plugged into the hole 20 Optical Image 21 prominent pieces 22-chip 23 Rear end film 24-week direction card 25 Bottom

Claims

1. A resin outer cylinder member, An inner cylinder member disposed within the hollow portion of the outer cylinder member, The system comprises an elastic body interposed between the outer cylindrical member and the inner cylindrical member, In a body mount in which the outer cylindrical member is press-fitted and fixed into the holder insertion hole, The outer cylindrical member comprises a cylindrical portion that forms the outer circumferential surface, A recess that is recessed radially inward from the cylindrical portion, It has a wall portion that extends from the portion forming the recess toward the tip in the press-fitting direction and faces the radially inward side of the cylindrical portion at a distance from each other, A body mount characterized by the following features.

2. In the body mount described in claim 1, The recess and wall portion are provided at two positions that are 180 degrees opposite each other via the inner cylindrical member. A body mount characterized by the following features.

3. In the body mount described in claim 1, The wall portion protrudes from the end of the outer cylindrical member in the axial direction of the outer cylindrical member. A body mount characterized by the following features.

4. In the body mount described in claim 1, The wall portion does not protrude from the end of the outer cylinder member in the axial direction of the outer cylinder member. A body mount characterized by the following features.

5. In the body mount described in claim 1, The wall portion is located radially inward from the recess. A body mount characterized by the following features.

Images