JP3423059B2 - Strut mount - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner member connected to an end of a piston rod of a shock absorber in a suspension system for a vehicle and an outer member of the inner member so as to surround the outer periphery of the inner member. An outer member attached to the vehicle body, an elastic member disposed between the inner member and the outer member by being attached to the peripheral portion of the inner member, and the elastic member being the shaft of the piston rod. The present invention relates to a strut mount provided with a stopper arranged so as to be able to come into contact with each other when deformed by a predetermined amount in a direction.

[0002]

2. Description of the Related Art As a conventional example, as shown in FIG. 6, the end of a piston rod 200 of a shock absorber is attached to a vehicle body 300 (see FIG. 1) through a strut mount 100, and the shock absorber has an outer periphery. A coil spring 400 (see FIG. 1) is arranged. Strut mount 100
A tubular inner member 101 connected to the end of the piston rod 200 of the shock absorber, an outer member 102 arranged outside the inner member 101 and attached to the vehicle body 300, the inner member 101 and the outer member 102. An elastic body 103 disposed between the elastic bodies 103 and stoppers 104 provided at both ends in the axial direction of the elastic body 103 so as to prevent the elastic body 103 from being deformed in the axial direction. The inner member 101 is a fitting for the piston rod 200, and the outer member 102 is an annular metal housing that houses and holds the elastic body 103 therein. Also, the inner member 101
Is formed by integrally connecting the cylinder 105 and the seat plate 106, the tip end of the piston rod 200 is inserted into the cylinder 105, and the nut 107 is tightened to connect the strut mount 100 to the shock absorber. ing. The outer member 102 includes two hat-shaped members 108, 1
09 are opposed to each other and are fixed to each other. Each of the hat-shaped members 108 and 109 has a cylindrical portion 108 having a circular cross section.
A, 109A, an annular inner flange portion 108B, 109B serving as a stopper 104 that extends radially inward at one end of the tubular portion 108A, 109A, and the tubular portion 1
Outer flange portions 108C for fixing to the vehicle body 300 extending radially outward at the other ends of the 08A and 109A,
It consists of 109C. This outer flange 108
C and 109C have several bolts 110 inserted between them.
And the strut mount 100 is attached to the vehicle body 300 by the bolt 110. The elastic body 103 is vulcanized and adhered to the outside of the inner member 101 by a usual rubber vulcanization molding method. The elastic body 103 is sandwiched between the hat-shaped members 108 and 109.

The seat plate 106 of the inner member 101 is a single flat metal plate, and since the horizontal surface in FIG. 6 has only the plate thickness, it is difficult to harden the spring in the left-right direction (radial direction). Met. Therefore, as shown in FIGS. 7 and 8, a seat plate 106 has been developed in which the outer peripheral edge of the seat plate 106 is pressed and bent to increase the height of the lateral surface to harden the spring in the left-right direction. However, the metal plate bent by a press as shown in FIGS. 7 and 8 can be manufactured at low cost, but when a large load is applied in the vertical direction (axial direction), the surface receiving the load is a plate on one side. Only the area for the thickness can be secured, the surface pressure increases, and the durability is poor. Also, stress concentrates on the corners of the bent end of the seat plate 16 and the durability deteriorates.

Therefore, in order to increase the height of the lateral surface and ensure sufficient durability even if a large vertical load is applied, a thick seat plate 106 as shown in FIG. 9 is forged. The produced one came to be developed.

[0005]

The seat plate 106 shown in FIG.
Then, the wall thickness has to be made thicker, which is disadvantageous in that the cost is higher than the bending process by pressing because of forging, and the weight is also increased.

Therefore, in the present invention, the horizontal direction (radial direction)
It is an object of the present invention to provide a strut mount that uses an inexpensive and light inner member that has a hard spring and has sufficient durability against a large vertical load (axial direction).

[0007]

To achieve the above object, the present invention encloses an inner member connected to an end portion of a piston rod of a shock absorber in a vehicle suspension system and an outer periphery of the inner member. An outer member disposed outside the inner member and attached to the vehicle body side, and an elastic member disposed between the inner member and the outer member by being attached to a peripheral portion of the inner member. , a strut mount and a stopper elastic body is capable of abutting disposed when deformed a predetermined amount in the axial direction of the piston rod, flat and pressed the peripheral portion of the said inner member Waso Na
A plate of an inner member that is bent and formed into a cylindrical shape.
The surface portions are arranged to face each other in the axial direction and the radial direction, and
There is a hole on the bottom of the side member for inserting the end of the piston rod.
The bent portion of the inner member is formed into a curved surface .

[0008]

The inner member used in the present invention is bent at its peripheral portion, and the plate surface portions of the inner member are arranged so as to face each other in the axial direction and the radial direction. Also has sufficient durability, the radial spring can be made hard, and it is cheap and lightweight.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 1, an inner member 1 connected to an end of a piston rod 200 of a shock absorber similar to the conventional one, and a vehicle body 300 arranged outside the inner member 1.
An outer member 2 attached to the outer member 2, an elastic member 3 disposed between the inner member 1 and the outer member 2, and both ends of the elastic member 3 in the axial direction so as to prevent axial deformation of the elastic member 3. And a stopper 4 provided in the. The peripheral edge portion 1A of the inner member 1 is bent and formed so that the plate surface portions 1B of the inner member 1 are arranged to face each other in the axial direction and the radial direction.
The inner member 1 having the bent peripheral edge portion 1A is formed into a flat cylindrical shape as a whole, and a hole 1C into which the end portion of the piston rod 200 is inserted is formed on the bottom surface. The piston rod 200 is fixed to the inner member 1 at 5. An outer cylinder 6 is vulcanized and adhered to the outer peripheral surface of the elastic body 3. The outer member 2 includes two hat-shaped members 7 and 8 which are opposed to each other and fixed to each other. Each hat-shaped member 7 and 8 includes tubular portions 7A and 8A having a circular cross section, and the tubular portion 7A. , 8A for fixing to the annular inward flange portions 7B and 8B that serve as stoppers 4 that extend radially inward, and to the vehicle body 300 that extends radially outward at the other ends of the tubular portions 7A and 8A. Outer flange portions 7C and 8C. The elastic body 3 is vulcanized and bonded between the inner member 1 and the outer cylinder 6 by a usual rubber vulcanization molding method. The outer cylinder 6 is press-fitted inside the cylindrical portion 7A. The outer cylinder 6 may be omitted, and in this case, the elastic body 3 is pressed against the inside of the cylindrical portion 7A.

The inner member 1 has a peripheral edge portion 1 as shown in FIG.
A is the plate surface portion 1 of the inner member 1 in the axial direction and the radial direction.
B is formed so as to be opposed to each other, and the entire shape is formed into a flat cylindrical shape, and the bottom portion is recessed inward. A hole 1C for attaching the piston rod 200 with the nut 5 is formed in the bottom portion.

The inner member 1 shown in FIG. 3 has a hollow cylindrical shape in which the bottom portion is not recessed inward and the whole is flat. The inner member 1 shown in FIG. It was formed in. By forming the bent portion into a curved surface, it is possible to reduce stress concentration on the corners and further improve durability.

The inner member 1 shown in FIGS. 2 to 4 does not need to have a large plate thickness as in the conventional case, and the peripheral portion 1 does not have to be thick.
By bending A so that the plate surface portions 1B are arranged so as to face each other, the strength in the axial direction and the radial direction can be improved and the weight can be reduced. Bending formation can be easily performed by an ordinary pressing method. Plate surface portion 1B of the inner member 1
Put two plates together as shown in the drawing
It is a single piece, not
It is not necessary to increase the plate thickness of the surface portion 1B, so it is lightweight.
It is possible to make it. In addition, bending is formed by the press method.
The shape before it is cylindrical is the upper and lower edges of the peripheral edge 1A.
Bend to form the plate surface portion 1B facing each other in the axial direction.
To achieve.

As shown in FIG. 5, the elastic body 3 has a plurality of continuous convex portions 10 formed at both ends in the axial direction. A plurality of the convex portions 10 are continuously formed on the circumference of both end surfaces of the elastic body 3, and four convex portions 10 are formed on each end surface in FIG. In addition, each convex portion 10 has a gentle inclined surface 11 on both sides of the apex, and these inclined surfaces 11 are continuous on the circumference.
That is, the inclined surfaces 11 are connected to each other at their lower ends. Further, a convex portion 12 that is vulcanized and bonded to the outer cylinder 6 is formed on the outermost side.

[0015]

As described above, according to the present invention, the peripheral edge portion of the inner member is bent so that the plate surface portions of the inner member are arranged to face each other in the axial direction and the radial direction. The height in the radial direction is also sufficient, and it has sufficient durability against a large load from the axial direction.
Further, since the ordinary metal plate is simply bent by a pressing method or the like, the production is easy, and further, it is possible to reduce the weight because the plate thickness itself does not need to be thick. Further, by forming the bent portion into a curved surface, the durability can be further improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the strut mount in FIG.

FIG. 3 is a cross-sectional view showing another example of the inner member.

FIG. 4 is a sectional view showing still another example of the inner member.

FIG. 5 is a perspective view showing an upper end portion of an elastic body.

FIG. 6 is a sectional view showing a conventional example.

FIG. 7 is a cross-sectional view showing a portion of an inner member showing another conventional example.

FIG. 8 is a cross-sectional view showing a portion of an inner member showing still another conventional example.

FIG. 9 is a sectional view showing a portion of an inner member showing still another conventional example.

[Explanation of symbols]

1 Inner member 1A peripheral part 1B Plate part 2 Outer member 3 elastic body 4 stopper 200 piston rod

Claims (2)

(57) [Claims] 1. An inner member (1) connected to an end of a piston rod (200) of a shock absorber in a vehicle suspension system, and the inner member (1) surrounding the outer periphery of the inner member (1). Member disposed outside the vehicle and attached to the vehicle body (300) side
(2) and an elastic body (3) disposed between the inner member (1) and the outer member (2) by being attached to the peripheral edge portion (1A) of the inner member (1), , This elastic body (3) is the piston rod
A strut mount comprising a stopper (4) arranged so as to be able to come into contact when it is deformed by a predetermined amount in the axial direction of (200), wherein the inner member (1) is pressed at its peripheral edge (1A). Is bent into a flat cylindrical shape, and the plate surface portions (1B) of the bent inner member (1) are axially and radially opposed to each other, and the piston rod is provided on the bottom surface of the inner member (1). A strut mount characterized in that a hole (1C) into which an end of (200) is inserted is formed, and a bent portion of the inner member (1) is formed into a curved surface. 2. The elastic body (3) is formed with a plurality of continuous convex portions (10) at both ends in the axial direction, and the convex portions (10) are at both ends of the elastic body (3). A plurality of continuous surfaces are formed on the circumference of the surface, and inclined surfaces (1
The strut mount according to claim 1, further comprising 1).