JPH08177938A - Diaphragm member, manufacture thereof and air spring using it - Google Patents

Abstract

PURPOSE: To simplify construction of a diaphragm member used for an air spring so as to efficiently produce the diaphragm members in large quantities, and simplify assembling of the air spring so as to reduce the price of the air spring. CONSTITUTION: This air spring is constituted of a cylindrical diaphragm member 18 composed of a small diameter pressure receiving member 9, a large diameter pressure receiving member 20 having a flange part 20A, a diaphragm layer 19 of which one end is the cut-off part of the diaphragm layer 19 and the other end has a small diameter clamp part 19B, and a ring-like small diameter bead wire 4 buried in the small diameter clamp part 19B, and a large diameter belt 23 for clamp fixedly securing the cut-off part on the one end of the diaphragm member 18 to the flange part 20A of the large diameter pressure receiving member 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new structure of a diaphragm member used in an air spring, a method of manufacturing the new diaphragm member, and an air spring using the new diaphragm member.

[0002]

2. Description of the Related Art Generally, leaf springs, coil springs, air springs, etc. are used as suspension springs for automobiles. These springs support the vehicle body, and vibrations and impact loads coming from the road surface cause vehicle body suspension. Used to mitigate transmission to In particular, the air spring is supplied with air from the outside,
By controlling the discharge, it is possible to maintain a constant vehicle attitude against changes in the load such as from an empty vehicle to a loaded vehicle, and moreover, a constant suspension stroke and low spring constant can be secured, improving ride comfort. Is.

FIG. 5 is a partial sectional side view showing a conventional air spring. In the figure, reference numeral 1 denotes a flexible diaphragm member, and this diaphragm member 1 has a cylindrical diaphragm layer 2, a ring-shaped large-diameter bead wire 3 and a large-diameter bead wire 3 as shown in the detailed sectional view of FIG. It is composed of a small diameter bead wire 4 having a ring shape. This diaphragm layer 2
As an example, as shown in the detailed sectional view of FIG. 7, the inner layer 5 made of an elastic material such as a rubber material, the bias layer
The so-called elastic bodies 5, 7, 8 and the bias cord 6 formed by the cord 6, the intermediate layer 7 made of an elastic body such as a rubber material, the bias cord 6, and the outer layer 8 made of an elastic body such as a rubber material. It is a sandwich structure. Further, at both ends of the diaphragm layer 2, a ring-shaped large-diameter clamp portion 2A and a ring-shaped small-diameter clamp portion 2B are respectively provided.
Are formed.

A large-diameter bead wire 3 is embedded in the ring-shaped large-diameter clamp portion 2A, and a small-diameter bead wire 4 is embedded in the ring-shaped small-diameter clamp portion 2B. The ring-shaped large-diameter clamp portion 2A and the ring-shaped small-diameter clamp portion 2B are fixed to one end of the bias cord 6, respectively. The bias cord 6 is provided in a plurality of layers (two layers in FIG. 7) to reinforce the side surface of the diaphragm layer 2 when the compressed air is filled in the air spring so as not to expand more than necessary. In addition, large-diameter bead wire 3 and small-diameter bead
The wire 4 fixes and strengthens the end of the diaphragm layer 2.

Reference numeral 9 denotes a small-diameter pressure receiving member, and a ring-shaped groove 9 having a semicircular cross section is formed on the peripheral portion of the upper surface of the small-diameter pressure receiving member 9.
A is formed. Reference numeral 10 denotes a small-diameter fixing plate, and a ring-shaped groove 10A having a semicircular cross section is formed in a peripheral portion on the lower surface side of the small-diameter fixing plate 10. Reference numeral 11 denotes a large-diameter pressure receiving member, and a ring-shaped clamp portion 11A for clamping the ring-shaped large-diameter clamp portion 2A of the diaphragm layer 2 is formed on a peripheral edge portion on the lower surface side of the large-diameter pressure receiving member 11.
Reference numeral 12 is a mounting bolt. The mounting bolt 12 has a through hole 12A for supplying compressed air. The through hole 12A of the mounting bolt 12 is aligned with the through hole 11B of the large-diameter pressure receiving member 11. It adheres to the large diameter pressure receiving member 11. 13 is a mounting bolt, and this mounting bolt 13
Is fixed to the large-diameter pressure receiving member 11. 14 is an air chamber, and this air chamber 14 is the large-diameter pressure receiving member 11,
It is composed of a diaphragm member 1 and a small diameter pressure receiving member 9.

The operation of assembling the air spring having the above structure will be briefly described below. First, the diaphragm member 1 will be described.
The ring-shaped large-diameter clamp portion 2A has a large-diameter pressure receiving member 11
-Shaped clamp part 11A formed on the lower surface side peripheral part of the
To fix. Then, the ring-shaped small-diameter clamp portion 2B of the diaphragm member 1 is fitted into the ring-shaped groove 9A having a semicircular cross section formed in the peripheral portion on the upper surface side of the small-diameter pressure receiving member 9, and then the lower surface side of the small-diameter fixing plate 10. It is fitted in a ring-shaped groove 10A having a semicircular cross section formed in the peripheral edge and fixed by a screw 15. Then, from the through hole 12A of the mounting bolt 12 to the through hole 11B of the large diameter pressure receiving member 11
Compressed air can be supplied to the air chamber 14 via the. The opposite static loads W that the large-diameter pressure receiving member 11 and the small-diameter pressure receiving member 9 can withstand are as follows. W = p · A where p is the static internal pressure (gauge pressure) A = 1/4 · πd ² d is the effective pressure receiving diameter.

[0007]

However, since the conventional air spring has the large diameter bead wire at the upper end of the diaphragm member and the small diameter bead wire at the lower end, the structure of the diaphragm member is complicated. Become. Moreover, since the structure of the diaphragm member is complicated, it is necessary to manufacture each diaphragm member one by one, and it is not possible to efficiently manufacture a large amount. In addition, the diaphragm member cannot be efficiently manufactured, and the structure of the clamp portion of the diaphragm member is complicated, resulting in high manufacturing cost and the cost of the air spring being low.

Therefore, a first object of the present invention is to simplify the structure of the diaphragm member. A second object of the present invention is to provide a manufacturing method capable of efficiently manufacturing a diaphragm member in a large amount. Also,
A third object of the present invention is to make an air spring inexpensive by using a diaphragm member having a simple structure and a clamp member having a simple structure.

[0009]

DISCLOSURE OF THE INVENTION A diaphragm member according to the present invention has a diaphragm layer having a small diameter clamp portion at one end and a small diameter clamp portion at the other end, and a ring embedded in the small diameter clamp portion. And a small diameter bead wire. A method of manufacturing a diaphragm member according to the present invention is a method of manufacturing a cylindrical diaphragm layer having a length 2L or a length L1 + L2 (where L1 ≠ L2) having small diameter clamp portions at both ends and a ring embedded in each small diameter clamp portion. A first step of producing a diaphragm member having a small-diameter bead wire and a cylindrical diaphragm member having a length of 2L or a length of 2L1 + L2 and divided into a length L or a length L1,
This is provided with a second step of producing a cylindrical diaphragm member of L2.

The air spring according to the present invention has a small diameter pressure receiving member, a large diameter pressure receiving member having a flange portion, one end being a cut portion of this diaphragm layer, and the other end having a small diameter clamping portion and this small diameter pressure receiving member. A cylindrical diaphragm member composed of a ring-shaped small-diameter bead wire embedded in the clamp portion, and a large-diameter clamping belt for fixing a cut portion, which is one end of the diaphragm member, to a flange portion of the large-diameter pressure receiving member. And a small diameter pressure receiving member, a large diameter pressure receiving member, and a cylindrical diaphragm member to form an air chamber.

[0011]

According to the present invention, the structure of the diaphragm member can be simplified, the diaphragm member can be efficiently manufactured in a large amount, the assembly of the air spring can be simplified, and the cost of the air spring can be reduced.

[0012]

1 is a side view, partly in section, showing an embodiment of an air spring according to the present invention. In the figure, reference numeral 18 denotes a flexible diaphragm member.
As shown in the detailed cross-sectional view of FIG. 2, the cylinder is composed of a cylindrical diaphragm layer 19 and a ring-shaped small-diameter bead wire 4. The diaphragm layer 19 is, for example, as described above (see FIG. 7), the inner layer 5 made of an elastic material such as a rubber material, the bias cord 6, the intermediate layer 7 made of an elastic material such as a rubber material, and the bias.・ Code 6,
And a sandwich structure of so-called elastic bodies 5, 7, 8 and bias cord 6 formed by an outer layer 8 made of an elastic body such as a rubber material.

Further, one end of the diaphragm layer 19 is a cut portion of the diaphragm layer 19, but a ring-shaped small-diameter clamp portion 19B is formed at the other end. The ring-shaped small-diameter bead wire 4 is embedded in the ring-shaped small-diameter clamp portion 19B. The ring-shaped small-diameter bead wire 4 is fixed to one end of the bias cord 6. 20 is a large-diameter pressure receiving member, and this large-diameter pressure receiving member 20 includes a flange portion 20A. 21 is a mounting bolt,
The mounting bolt 21 has a through hole 21A for supplying compressed air, and the large diameter pressure receiving member 20 is provided in the through hole 21A.
The through holes 20B are aligned and fixed to the large diameter pressure receiving member 20.

Reference numeral 22 is a mounting bolt, which is fixed to the large-diameter pressure receiving member 20.
Reference numeral 23 is a large-diameter clamping belt, and this large-diameter clamping belt 23 fixes a cut portion, which is one end portion of the diaphragm layer 19, to the flange portion 20A of the large-diameter pressure receiving member 20. 24 is an air chamber, and this air chamber 24
Is composed of the large-diameter pressure receiving member 20, the diaphragm member 18, and the small-diameter pressure receiving member 9.

Next, the assembling operation of the air spring having the above structure will be briefly described. First, the flange 20A of the large-diameter pressure receiving member 20 is attached with the cutting portion that is one end of the diaphragm member 18, and then the large-diameter clamping belt 23 is tightened. Then, the ring-shaped small-diameter clamp portion 19B of the diaphragm member 18 is fitted into the ring-shaped groove 9A having a semicircular cross section formed in the peripheral portion on the upper surface side of the small-diameter pressure receiving member 9, and then the lower surface side of the small-diameter fixing plate 10. The screw 1 is fitted into the ring-shaped groove 10A having a semicircular cross section formed in the peripheral portion.
It is fixed by 5. Then, compressed air can be supplied from the through hole 21A of the mounting bolt 21 to the air chamber 24 through the through hole 20B of the large diameter pressure receiving member 20.

Next, the manufacturing process of the diaphragm member having the above structure will be briefly described. First, as shown in FIG. 3, a diaphragm member 18 having a length twice as long as the length L (see FIG. 2) (length 2L) is formed, and ring-shaped small-diameter clamps formed at both ends thereof. Ring-shaped small-diameter bead wires 4 and 4 are embedded in the portion. Then, two diaphragm members 18 having a length L can be manufactured by cutting the A1-A2 portion of the diaphragm member 18 having a length 2L. In this way, the two diaphragm members 18 can be efficiently manufactured in one manufacturing process.

In the embodiment described above, the length (length 2) of the diaphragm member 18 is twice the length L (see FIG. 2).
The case of manufacturing the two diaphragm members 18 having the length L by manufacturing the one having the length L) is described, but the invention is not limited to this, and the length L1 and the length L2 (however, L
Needless to say, it may be cut into two diaphragm members (1 ≠ L2, L1 + L2 = 2L) and used.

In the above description, the end portion of the diaphragm member 18 is not provided with the recess for positioning the large diameter clamping belt 23, but the present invention is not limited to this, and as shown in FIG. 4, for example. It is needless to say that the depression 19C may be provided to facilitate positioning, and that projections (not shown) of various shapes may be formed.

[0019]

As described above in detail, the diaphragm member according to the present invention, the method for manufacturing the diaphragm member, and the air spring using the diaphragm member can simplify the structure of the diaphragm member. Therefore, the diaphragm member can be efficiently manufactured in a large amount, and the air spring can be manufactured at a low cost.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an embodiment of an air spring according to the present invention.

2 is a cross-sectional view showing the diaphragm member of FIG.

FIG. 3 is a cross-sectional view showing a method of manufacturing the diaphragm member of FIG.

4 is a cross-sectional view showing another diaphragm member of FIG.

FIG. 5 is a partial cross-sectional side view showing a conventional air spring.

6 is a cross-sectional view showing the diaphragm member of FIG.

FIG. 7 is a partial detailed cross-sectional view of the diaphragm layer in FIG.

[Explanation of symbols]

 18 Diaphragm member 19 Diaphragm layer 20 Large diameter pressure receiving member 23 Large diameter clamping belt 24 Air chamber

Claims (3)

[Claims] 1. A small diameter pressure receiving member, a large diameter pressure receiving member, and a cylindrical diaphragm member having one end fixed to the small diameter pressure receiving member and the other end fixed to the large diameter pressure receiving member. An air spring in which an air chamber is formed by a small-diameter pressure receiving member, a large-diameter pressure receiving member, and a cylindrical diaphragm member, wherein the diaphragm member has one end that is a cut portion of the diaphragm layer and the other end that has a small-diameter clamp portion. A diaphragm member comprising a diaphragm layer and a ring-shaped small-diameter bead wire embedded in a small-diameter clamp portion of the diaphragm layer. 2. A small-diameter pressure receiving member, a large-diameter pressure receiving member, and a cylindrical diaphragm member having one end fixed to the small-diameter pressure receiving member and the other end fixed to the large-diameter pressure receiving member. In an air spring that forms an air chamber with a small diameter pressure receiving member, a large diameter pressure receiving member, and a cylindrical diaphragm member, a length 2L or a length L1 + L2 (provided that L1 ≠ L2) has a small diameter clamp portion at both ends. A first step of producing a diaphragm member including a cylindrical diaphragm layer and a ring-shaped small-diameter bead wire embedded in the small-diameter clamp portion, and the length 2L or the length L
A method of manufacturing a diaphragm member, comprising: a second step of dividing a 1 + L2 cylindrical diaphragm member into a cylindrical diaphragm member having a length L or lengths L1 and L2. 3. A small diameter pressure receiving member, a large diameter pressure receiving member having a flange portion, one end being a cut portion of this diaphragm layer, and the other end being embedded in this small diameter clamping portion and a diaphragm layer having a small diameter clamping portion. A cylindrical diaphragm member composed of a ring-shaped small-diameter bead wire,
A large-diameter clamp belt for fixing a cut portion, which is one end of the diaphragm member, to a flange portion of the large-diameter pressure receiving member, and forming an air chamber by the small-diameter pressure receiving member, the large-diameter pressure receiving member, and the cylindrical diaphragm member. An air spring characterized by being.