JP2006090366A - Suspension support - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suspension support accurately defining a circumference direction position of a rubber like elastic body in relation to a lower outer tube member and accurately defining a circumference direction of an upper outer tube member in relation to the rubber like elastic body and a lower outer tube member. <P>SOLUTION: This support is provided with an inner tube 2, an outer tube 4 and the rubber like elastic body 5. The inner tube 2 consists of a tube part and a first flange 7, and a fitting hole 9 in which a fitting part of a piston rod is fitted is provided in a hollow part 14 of the tube part 6. The upper outer tube member 11 is provided with a second flange 13, and the lower outer tube member 12 is provided with a third flange 15. A plurality of upper side bolt insertion through holes are formed on the second flange part 13, and a plurality of lower side bolt insertion through holes are formed on the third flange part 15. A positioning part 18 is formed on the upper outer tube member 11. A hole part 10 of the rubber like elastic body 5 and a rubber projection part 19 for positioning are formed on an inner circumference surface 10A and the rubber like elastic body 5 respectively by vulcanization as one unit. The rubber projection part 19 is positioned in an opening 20 formed on the upper outer tube member 11 in a plan view. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a suspension support.

  In general, a suspension support includes an inner cylinder that is fixed by inserting a piston rod of a shock absorber, an outer cylinder that is fixed to a vehicle body with a mounting bolt, and an annular rubber elastic body that is interposed between the inner and outer cylinders. (See Patent Document 1).

  The inner cylinder is composed of a cylinder part and a first flange projecting radially outward from the cylinder part, and is fitted with a non-circular cross-section fitting to a non-circular cross-section fitting part of the piston rod. A hole is provided in the cylindrical portion. The rubber-like elastic body is vulcanized and molded integrally with the inner cylinder so that the outer peripheral portion of the first flange of the inner cylinder is buried in the inner peripheral portion of the rubber-like elastic body, and the rubber-like elasticity above the first flange. The hole of the body is formed into a tapered hole that spreads upward.

  The outer cylinder includes an upper outer cylinder member and a lower outer cylinder member that house a rubber-like elastic body and clamp in the vertical direction. The upper outer cylinder member includes a second flange, the lower outer cylinder member includes a third flange that is overlapped and fixed to the second flange from below, and a plurality of upper bolt insertion holes through which mounting bolts are inserted are second. A plurality of lower bolt insertion holes are formed in the flange and formed on the third flange so as to be inserted into the plurality of upper bolt insertion holes and overlapping with the upper bolt insertion holes, respectively. An example) is formed.

  In this type of suspension support, the fitting portion of the piston rod has a non-circular shape such as an oval cross-sectional shape, and the fitting hole of the inner cylinder has an oval cross-sectional shape. The position of the suspension support with respect to the piston rod (the position in the circumferential direction of both) is determined by fitting the fitting portion and the fitting hole. Further, since the positioning hole is formed in the upper outer cylinder member, when the positioning hole is aligned with the positioned portion on the vehicle body side, the position of the piston rod with respect to the vehicle body (position in the circumferential direction of the piston rod) Is decided.

  To accurately determine the position of the piston rod with respect to the vehicle body, when assembling the suspension support, the rubber-like elastic body integral with the inner cylinder is accurately positioned in the circumferential direction with respect to the lower outer cylinder member, The outer cylinder member must be accurately positioned in the circumferential direction with respect to the rubber-like elastic body and the lower outer cylinder member.

Therefore, conventionally, the suspension support has been assembled as follows.
(1) Lower the rubber-like elastic body so that the bolt insertion hole is positioned on a virtual line passing through the center of the fitting hole and orthogonal to the linear peripheral edge of the oval fitting hole in plan view. Position with respect to the side outer cylinder member. Then, the rubber-like elastic body is assembled to the lower outer cylinder member. Thereby, the circumferential position of the rubber-like elastic body with respect to the lower outer cylinder member can be determined.
(2) The upper outer cylinder member is positioned with respect to the rubber-like elastic body and the lower outer cylinder member so that the positioning hole is positioned on the virtual line in plan view. Then, the upper outer cylinder member is assembled to the rubber-like elastic body and the lower outer cylinder member. Thereby, the position of the circumferential direction of the upper side outer cylinder member with respect to a rubber-like elastic body and a lower side outer cylinder member can be determined.
JP 2001-280401 A

  However, according to the conventional means, when the bolt insertion hole is positioned on the virtual line, the posture of the fitting hole must be determined to assume the virtual line, and the posture of the fitting hole can be accurately determined. In some cases, it is difficult to perform positioning accurately.

  The object of the present invention is to accurately determine the circumferential position of the rubber-like elastic body relative to the lower outer cylinder member, and to determine the circumferential position of the upper outer cylinder member relative to the rubber-like elastic body and the lower outer cylinder member. It is to provide a suspension support that can be determined accurately.

A feature of the present invention is that an inner cylinder in which a piston rod of a shock absorber is inserted and fixed, an outer cylinder fixed with a mounting bolt on the vehicle body side, and an annular rubber elastic body interposed between the inner and outer cylinders. Prepared,
The inner cylinder is composed of a cylinder part and a first flange projecting radially outward from the cylinder part,
A fitting hole having a non-circular cross section that fits into a non-circular fitting section of the piston rod is provided in the hollow portion of the cylindrical portion,
The rubber elastic body is vulcanized and integrated with the inner cylinder so that the outer peripheral portion of the first flange of the inner cylinder is buried in the inner peripheral portion of the rubber elastic body;
A hole portion of the rubber-like elastic body above the first flange is formed into a tapered hole that spreads upward,
The outer cylinder includes an upper outer cylinder member and a lower outer cylinder member that house the rubber-like elastic body and clamp in the vertical direction, and the upper outer cylinder member includes a second flange. The lower outer cylinder member includes a third flange that is fixed by being overlapped from below, and a plurality of upper bolt insertion holes through which the mounting bolts are inserted are formed in the second flange. A plurality of lower bolt insertion holes through which the mounting bolts are inserted to overlap each other are formed in the third flange,
A positioning portion for the vehicle body is formed on the upper outer cylinder member, and a positioning rubber convex portion is integrally vulcanized and molded with the rubber elastic body on the inner peripheral surface of the hole of the rubber elastic body. Thus, the rubber convex portion is located in an opening formed in the upper outer cylinder member.

  According to this configuration, the rubber convex portion for positioning is integrally vulcanized with the rubber elastic body on the inner peripheral surface of the hole portion of the rubber elastic body, and the rubber convex portion is the upper outer cylinder member in plan view. Therefore, the suspension support can be assembled as follows.

  For example, the rubber-like elastic body is positioned with respect to the lower outer cylindrical member so that the lower bolt insertion hole is positioned on a virtual line passing through the center of the rubber convex portion and the fitting hole in plan view. Then, the rubber-like elastic body is assembled to the lower outer cylinder member. Thereby, the rubber-like elastic body can be accurately positioned in the circumferential direction with respect to the lower outer cylinder member. Next, the upper outer cylinder member is attached to the rubber-like elastic body and the lower outer cylinder member so that the positioning portion is positioned on the virtual line while viewing the rubber convex portion from above through the opening formed in the upper outer cylinder member. Position with respect to. Then, the upper outer cylinder member is assembled to the rubber-like elastic body and the lower outer cylinder member. Thereby, the upper outer cylinder member can be accurately positioned in the circumferential direction with respect to the rubber-like elastic body and the lower outer cylinder member.

  For example, it is conceivable that an operator applies paint to a place where the rubber convex portion is located to form a mark without forming the rubber convex portion on the inner peripheral surface of the hole portion of the rubber-like elastic body. . However, with this means, it takes time to apply the paint, and the manufacturing cost increases. On the other hand, in the present invention, since the rubber convex portion is integrally vulcanized with the rubber-like elastic body on the inner peripheral surface of the rubber-like elastic body, the operator does not mark the inner peripheral surface with paint. The paint application work for marking can be omitted. Therefore, it can be manufactured at low cost.

  In the present invention, the cross-sectional shape of the fitting hole is set to an oval shape, and the fitting hole is fitted to the fitting portion whose cross-sectional shape is set to an oval shape. can do. According to this structure, a fitting hole can be made into a simple shape.

In the present invention, the positioning portion comprises a positioning hole formed in the upper outer cylinder member,
In a plan view, passing through the center of the fitting hole and on a virtual line orthogonal to the linear peripheral edge of the fitting hole, one bolt insertion hole among the plurality of upper bolt insertion holes, and When the rubber protrusion and the positioning hole are positioned, the following action can be achieved.

  In a plan view, the rubber-like elastic body is positioned with respect to the lower outer cylinder member so that the lower bolt insertion hole is positioned on the virtual line. Then, the rubber-like elastic body is assembled to the lower outer cylinder member. Thereby, the rubber-like elastic body can be accurately positioned in the circumferential direction with respect to the lower outer cylinder member. Next, the upper outer cylinder member is attached to the rubber-like elastic body and the lower outer cylinder member so that the positioning hole is positioned on the virtual line while viewing the rubber convex portion from above through the opening formed in the upper outer cylinder member. Position with respect to. Then, the upper outer cylinder member is assembled to the rubber-like elastic body and the lower outer cylinder member. Thereby, the upper outer cylinder member can be accurately positioned in the circumferential direction with respect to the rubber-like elastic body and the lower outer cylinder member.

  According to the present invention, the circumferential position of the rubber-like elastic body relative to the lower outer cylinder member can be accurately determined, and the circumferential position of the upper outer cylinder member relative to the rubber-like elastic body and the lower outer cylinder member. It was possible to provide a suspension support that can accurately determine the manufacturing cost and can reduce the manufacturing cost.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1, 2, 3, and 7, an inner cylinder 2 in which the piston rod 1 of the shock absorber S is inserted and fixed, an outer cylinder 4 that is fixed to the vehicle body B with a mounting bolt 3, and an inner and outer cylinder 2 shows a suspension support for an automobile provided with an annular rubber-like elastic body 5 interposed between 2 and 4.

  The inner cylinder 2 includes a cylinder portion 6 and a first flange 7 projecting radially outward R from the cylinder portion 6, and is fitted to a fitting portion 8 having a non-circular cross section of the piston rod 1. A fitting hole 9 having a non-circular cross section is provided in the hollow portion 14 of the cylindrical portion 6. The rubber-like elastic body 5 is vulcanized and molded integrally with the inner cylinder 2 so that the outer peripheral portion 7A of the first flange 7 of the inner cylinder 2 is buried in the inner peripheral portion 5A of the rubber-like elastic body 5. A hole portion 10 of the rubber-like elastic body 5 on the upper side U from 7 is formed into a tapered hole extending upward. As shown in FIG. 5 and FIG. 6, a first uneven portion 21 that is uneven in the circumferential direction is formed on the outer peripheral portion of the rubber-like elastic body 5. Moreover, as shown in FIGS. 4 and 6, a plurality of convex portions 22 having a circular arc shape in plan view arranged at regular intervals in the circumferential direction are formed on the upper surface of the rubber-like elastic body 5. A plurality of grooves 27 are formed radially, and a hemispherical protrusion 23 is formed between adjacent grooves 27.

  The outer cylinder 4 is composed of an upper outer cylinder member 11 and a lower outer cylinder member 12 that house a rubber-like elastic body 5 and clamp in the vertical direction P. The lower outer cylinder member 12 is formed in an upper open cup shape and includes a rubber-like elastic body accommodating portion 26. On the peripheral wall 24 of the rubber-like elastic body accommodating portion 26, a second uneven portion 25 that is uneven in the circumferential direction is formed (see FIG. 3). The first uneven portion 21 of the rubber-like elastic body 5 is fitted to the second uneven portion 25. A lower plate 29 is fixed to the bottom wall 28 of the lower outer cylinder member 12. The upper outer cylinder member 11 includes a second flange 13. The lower outer cylinder member 12 includes a third flange 15 which is welded and fixed to the second flange 13 from the lower side D, and a plurality of upper bolt insertion holes 16 through which the mounting bolts 3 are inserted are formed in the second flange 13. A plurality of lower bolt insertion holes 17 are formed in the third flange 15 so as to overlap the plurality of upper bolt insertion holes 16 and pass through the mounting bolts 3, respectively. A positioning hole 18 (corresponding to a positioning portion) is formed.

  The fitting portion 8 of the piston rod 1 has a cross-sectional shape set to an oval shape, and the fitting hole 9 of the inner cylinder 2 also has a cross-sectional shape set to an oval shape. By fitting the fitting portion 8 and the fitting hole 9, the position of the suspension support with respect to the piston rod 1 (the position in the circumferential direction of both) can be determined. Further, since the positioning hole 18 is formed in the upper outer cylinder member 11, the position of the piston rod 1 relative to the vehicle body can be determined by fitting the positioning pin on the vehicle body B side into the positioning hole 18.

  To accurately determine the position of the piston rod 1 with respect to the vehicle body B, the rubber elastic body 5 integrated with the inner cylinder 2 is accurately positioned with respect to the lower outer cylinder member 12 in the circumferential direction when assembling the suspension support. Furthermore, the upper outer cylinder member 11 must be accurately positioned in the circumferential direction with respect to the rubber-like elastic body 5 and the lower outer cylinder member 12. The means is configured as follows.

  That is, the positioning rubber projection 19 is vulcanized and molded integrally with the rubber elastic body 5 on the inner peripheral surface 10 </ b> A of the hole 10 of the rubber elastic body 5. The rubber protrusion 19 is located in an opening 20 formed in the upper outer cylinder member 11 in plan view. In the present embodiment, most of the rubber convex portion 19 is located in the opening 20, but a part or all of the rubber convex portion 19 may be located in the opening 20. “The rubber convex portion 19 is located in the opening 20 formed in the upper outer cylinder member 11 in a plan view” does not mean that the entire rubber convex portion 19 is located in the opening 20. It also means that a part of the rubber protrusion 19 is located as described above. Thereby, the rubber convex portion 19 can be visually recognized from above.

  One of the plurality of upper bolt insertion holes 16 on a virtual line L passing through the center O of the fitting hole 9 and orthogonal to the linear peripheral edge 9A of the fitting hole 9 in plan view. The insertion hole 16, the rubber protrusion 19, and the positioning hole 18 are located.

The suspension support having the above structure is assembled as follows (see FIGS. 8 and 9).
The rubber convex portion 19, the fitting hole 9, and one bolt insertion hole 17 of the lower bolt insertion holes 17 are arranged in a straight line in plan view (specifically, they are positioned on the imaginary line L). (See FIG. 1), the rubber-like elastic body 5 is housed in the housing portion 24 of the lower outer cylinder member 12, and the first uneven portion 21 of the rubber-like elastic body 5 is fitted into the second uneven portion 25. Combine. Thereby, the rubber-like elastic body 5 integral with the inner cylinder 2 can be accurately positioned with respect to the lower outer cylinder member 12 in the circumferential direction. Then, the rubber convex portion 19, the fitting hole 9, the bolt insertion hole 17, and the positioning hole 18 are aligned in a straight line while viewing the rubber convex portion 19 and the fitting hole 9 from above through the opening 20. As shown in FIG. 1 (refer to FIG. 1 in detail), the upper outer cylinder member 11 is assembled to the rubber-like elastic body 5 and the lower outer cylinder member 12.

[Another embodiment]
The cross-sectional shape of the fitting portion 8 of the piston rod 1 and the cross-sectional shape of the fitting hole 9 are not limited to an oval shape. The positioning part is not limited to the positioning hole but may be a convex part for positioning. The rubber-like elastic body accommodating portion 26 may be provided on the lower outer cylinder member 12 side.

Top view of suspension support AA sectional view of FIG. Bottom view of suspension support Top view of rubbery elastic body CC sectional view of FIG. Bottom view of rubber-like elastic body Top view of suspension support with piston rod assembled Longitudinal sectional view showing assembly process of rubbery elastic body and lower outer cylinder member Longitudinal sectional view showing assembly process of rubbery elastic body and upper outer cylinder member

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Piston rod, 2 ... Inner cylinder, 3 ... Mounting bolt, 4 ... Outer cylinder, 5 ... Rubber-like elastic body, 5A ... Inner peripheral part of rubber-like elastic body, 6 ... Cylinder part, 7 …… First flange, 7A ...... Outer peripheral portion of the first flange, 8 …… Fitting portion, 9 …… Fitting hole, 9A… Linear peripheral portion of the fitting hole, 10 …… First flange Holes on the upper side of the rubber-like elastic body, 10A... Inner peripheral surface of the hole on the upper side of the rubber-like elastic body above the first flange, 11... , 13 ... 2nd flange, 14 ... Hollow part, 15 ... 3rd flange, 16 ... Upper bolt insertion hole, 17 ... Lower bolt insertion hole, 18 ... Positioning part (positioning hole), 19 ... ... rubber protrusion, 20 ... opening formed in upper outer cylinder member, L ... imaginary line, O ... center of fitting hole, S ... shock absorber, B ... Body, R ...... radially outward side, P ...... vertical, U ...... upper, D ...... lower

Claims (3)

An inner cylinder to which the piston rod of the shock absorber is inserted and fixed; an outer cylinder fixed by a mounting bolt on the vehicle body; and an annular rubber-like elastic body interposed between the inner and outer cylinders;
The inner cylinder is composed of a cylinder part and a first flange projecting radially outward from the cylinder part,
A fitting hole having a non-circular cross section that fits into a non-circular fitting section of the piston rod is provided in the hollow portion of the cylindrical portion,
The rubber elastic body is vulcanized and integrated with the inner cylinder so that the outer peripheral portion of the first flange of the inner cylinder is buried in the inner peripheral portion of the rubber elastic body;
A hole portion of the rubber-like elastic body above the first flange is formed into a tapered hole that spreads upward,
The outer cylinder includes an upper outer cylinder member and a lower outer cylinder member that house the rubber-like elastic body and clamp in the vertical direction, and the upper outer cylinder member includes a second flange. The lower outer cylinder member includes a third flange that is fixed by being overlapped from below, and a plurality of upper bolt insertion holes through which the mounting bolts are inserted are formed in the second flange. A plurality of lower bolt insertion holes through which the mounting bolts are inserted to overlap each other are formed in the third flange,
A positioning portion for the vehicle body is formed on the upper outer cylinder member, and a positioning rubber convex portion is integrally vulcanized and molded with the rubber elastic body on the inner peripheral surface of the hole of the rubber elastic body. A suspension support in which the rubber convex portion is located in an opening formed in the upper outer cylinder member.   The suspension according to claim 1, wherein a cross-sectional shape of the fitting hole is set to an oval shape, and the fitting hole is fitted to the fitting portion whose cross-sectional shape is set to an oval shape. support. The positioning portion comprises a positioning hole formed in the upper outer cylinder member,
In a plan view, passing through the center of the fitting hole and on a virtual line orthogonal to the linear peripheral edge of the fitting hole, one bolt insertion hole among the plurality of upper bolt insertion holes, and The suspension support according to claim 2, wherein a rubber convex portion and the positioning hole are located.

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