JPH0135214B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elastic joint using a rubber member.

As shown in FIGS. 6 and 7, the conventional elastic joint has six mounting brackets 101 arranged at equal intervals on the same circumference and is integrally attached to the mounting brackets between adjacent mounting brackets 101. Six sulfurized rubber members 10
It is composed of 2. This elastic joint is mainly used to connect two rotating shafts, and the three mounting fittings 101 selected from among the six mounting fittings 101 are attached to the triangular shape of one rotating shaft. The other three fittings 101 are attached to the triangular flange portions of other rotating shafts. During this installation, the elastic joint is pressed from the outer periphery toward the center by the mounting bracket, and the six mounting brackets 101 are arranged on the same circumference, which is smaller than when no pressure is applied, and the rubber member 102 is The distance between the metal fittings 101 is pressed and becomes compressed. In this state, this elastic joint is fixed to each triangular flange of the two rotating shafts. The reason why the rubber member 102 is attached to the rotating shaft in a compressed state is to ensure that the stress acting on the rubber member 102 is always in a compressed state when used as an elastic joint. This prevents early deterioration of rubber that occurs when tensile stress is applied.

In the conventional elastic joint described above, since all six mounting fittings 101 are held on the same small circumference while being attached to two rotating shafts, the installation tool is complicated, and the installation and removal work is also complicated. In order to facilitate the installation of conventional elastic joints, banded elastic joints are known in which the outer periphery of the elastic joint is tightened with a pre-compression band. However, although this joint does not require complicated installation tools or installation work, it has the disadvantage that it requires a step to remove the band after installation. Furthermore, when a conventional elastic joint is removed from two rotating shafts, the same stress as the compressive force of the compressed rubber member 102 is not applied from the outside by pressing the elastic joint from its outer periphery in the same way as when installing the elastic joint. It was difficult to remove it from the rotating shaft. Also, when removing the device, it was necessary to reapply the band, remove it, attach it again, and then remove the band.

The present invention overcomes the above-mentioned disadvantages, and by pressing the mounting bracket group attached to one rotating shaft, the mounting bracket groups of the other groups can be placed in the correct mounting position without any other operation. The purpose is to provide elastic joints. That is, the elastic joint of the present invention has a substantially polygonal shape consisting of an even number of mounting fittings of 4 or more and the same number of rubber members as the mounting fittings connected between two adjacent fittings, The even number of mounting brackets form first and second mounting bracket groups consisting of every other mounting bracket, and the first and second mounting bracket groups are located on two different concentric circles. When in use, the mounting brackets that form a large circle are compressed toward the center, and as the mounting brackets are compressed, they are pushed out toward the outer periphery so that they are positioned approximately on the same circle as the mounting brackets that formed a small circle. It is characterized by being fixed to a member.

An embodiment of the elastic joint of the present invention is shown in FIGS. 1 to 3. This elastic joint has six mounting brackets 1, 2,
3, 4, 5, 6 and adjacent mounting brackets 1 and 2,
Rubber members 7, 8, 9, 1 integrally vulcanized between 2 and 3, 3 and 4, 4 and 5, 5 and 6, and 6 and 1
It is composed of 0, 11, and 12. The six fittings 1 to 6 all have substantially the same shape, and have a through hole 1a in the center and protrusions 1b and 1c on the upper and lower sides, as shown in the cross section of the fitting 1 in FIG. These mounting fittings 1 to 6 have their central axes arranged parallel to the central axis of the elastic joint, and are located on the circumferences of two circles centered on the central axis of the elastic joint. That is, the central axes of the mounting brackets 1, 3, and 5 are on the circumference of a large circle A with a diameter a, and the central axes of the mounting brackets 2, 4, and 6
The central axis of is on the circumference of a small circle B with a diameter b.
Three fittings 1, 3, and 5 form one group, and three fittings 2, 4, and 6 form another group. In addition, as shown in FIG. 2, the mounting bracket 1,
A group of three pieces 3 and 5 have stepped portions (for example, 14 and 15) at both ends. On the other hand, the stepped portions are not formed at both ends of the mounting fittings 2, 4, and 6 forming the other group. Also, mounting brackets 1, 3,
One group of 5 has mounting brackets 2, 4, and 6 of other groups,
In Figure 2, the left end protrudes and the right end extends inward. These fittings 1 to 6 are arranged as described above, and the rubber members 7 to 12 are heated together with the rubber members 7 to 12 in a mold, and the rubber members 7 to 12 are bonded to the fittings 1 to 6 and vulcanized. In addition, rubber members 7 to 12
has a square cross section, as shown in FIG. 3, which is a sectional view taken along line C-C' in FIG.

The structure of the elastic joint according to the embodiment of the present invention is as described above. When this elastic joint is installed on a rotating shaft, only one group of mounting brackets 1, 3, and 5 are pressed toward the center from the outer periphery by the installation tool, and the mounting brackets 1, 3, and 5 are located on the same slightly smaller circumference. .
As a result, the rubber members 7 to 12 are strongly pressed and compressed between the respective mounting fittings 1 and 2, 2 and 3, 3 and 4, 4 and 5, 5 and 6, and 6 and 1. Furthermore, as the mounting brackets 1, 3, and 5 forming another group are pushed toward the center from the outer periphery, they are pushed out to the outer periphery and are positioned on the same slightly larger circumference. . In this state, the mounting brackets 1, 3, and 5 and the mounting brackets 2, 4, and 6 are located on the same circumference.
Here, a group of mounting brackets 1, 3, and 5 abut the flange portion (not shown) of one rotating shaft on the left side in Figure 2, and bolt bolts into each through hole (for example, 1a) of the mounting brackets 1, 3, and 5. (not shown) and tighten with a nut (not shown) to integrally connect the flange portion and the mounting fittings 1, 3, and 5. At this point, remove the installation tool from the elastic joint. Even if the mounting tool is removed, no change occurs in the elastic joint because the mounting fittings 1, 3, and 5 are fixed to the flange portion of one rotating shaft.
Then, with the mounting tool removed, the flange portion of another rotating shaft (not shown) is brought into contact with the right end surface of the mounting brackets 2, 4, and 6 that make up the other group of this elastic joint in FIG. , bolts and nuts (not shown)
to integrally connect the flange portion and the mounting brackets 2, 4, and 6. Conversely, when removing the elastic joint of this embodiment from the two rotating shafts, reverse the operation and remove one group of mounting brackets 2, 4, and 6 from the flange, and then use the installation tool to attach the other group. Remove metal fittings 1, 3, and 5 from other flanges.

As is clear from the installation and removal operations of the elastic joint of this embodiment, the elastic joint of the present invention requires an installation tool only when attaching and removing the mounting brackets located on the circumference of a large circle to the rotating shaft. . However, no installation tools are required when attaching and removing other attachment fitting groups located on the circumference of the small circle to other rotating shafts. This facilitates installation and removal work. In addition, rubber members 7 to 12
Since it is constantly subjected to compressive stress, it has excellent durability similar to conventional elastic joints.

Next, improvements to the elastic joint of the present invention will be explained. This is a resilient joint of the present invention in which a group of mounting brackets forming a large circle is compressed and positioned approximately on the same circle as a group of mounting brackets forming a small circle, and a group of mounting brackets is fixed with a fixing member. It is. This makes the installation and removal work extremely easy without the need for installation tools.

An example of improvement of elastic joints is shown in Figures 4 and 5.
As shown in the figure. This elastic joint uses the elastic joint of the embodiment shown in Figs. 1 to 3 as it is, and has a large circle A.
Mounting brackets 1, 3, located on the circumference of (Fig. 1)
5 is pressed toward the center from the outer periphery, and in this state fixing members 16 and 17 made of substantially triangular metal plates are fixed to both ends of the mounting fittings 1, 3, and 5. The fixing members 16, 17 have circular holes 161, 162, 163 at the top of each corner and an opening 16 at the center.
Has 4. The stepped tips of one end of the mounting brackets 1, 3, 5 (e.g., FIG. 2 15) are each inserted into the top opening (e.g., FIG. 4 161) of this fixing member 16, and
A plurality of circumferential portions of the stepped tip are caulked from the center toward the outer circumference, and these caulked portions (for example, 111 and 112 in FIG. 5) attach the mounting brackets 1, 3, and 5.
and the fixing members 16, 17 are integrally connected. The elastic joint of the improved embodiment has the above structure. Mounting brackets 1 to 6 of this elastic joint
is located at the same position as the joining position of the flange portion of the rotating shaft to be joined. Therefore, like the conventional elastic joint with a band tightened with a pre-compression band, this elastic joint can be directly connected to the flange portion of the rotating shaft with bolts and nuts without the need for installation tools. However, the fixing members 16 and 17 of the elastic joint according to this improvement fix only the mounting bracket fixed to one rotating shaft, and fix or restrict the movement of other mounting brackets fixed to other rotating shafts. It's not a thing.
For this reason, these fixing members 16 and 17 are used in a fixed state without being removed after the rotating shafts are coupled. Further, even when the rotating shaft and the elastic joint are removed, the fixing members 16 and 17 are attached as they are, so there is no need to use an attachment tool or the like. Therefore, the improved elastic joint of the present invention is extremely easy to handle.

In the above description, only six mounting brackets are shown in the embodiment, but the number of mounting brackets may be at least four, as long as it is an even number so that it can be divided into two groups. Furthermore, the shape of the mounting fittings is not limited to the one that is fastened with bolts and nuts as shown in the embodiments, but various mounting fittings that are found in conventional elastic joints can be employed. The rubber members are not limited to those shown in the embodiments, and may have different cross-sectional shapes and external shapes depending on the use. The fixing member may also be of any type as long as it can integrally hold the group of mounting fittings, and various shapes can be adopted. The fixed portions of the mounting bracket and the fixing member do not necessarily have to be the ends. Further, the number of fixing members may be one as long as it has sufficient strength to hold the mounting bracket in a predetermined position.

[Brief explanation of drawings]

1 to 3 show an embodiment of the elastic joint of the present invention, FIG. 1 is a plan view thereof, FIG. 2 is a partially sectional side view, and FIG. 3 is a line C-C′ in FIG. 1. A sectional view taken in the direction of arrows, and FIGS. 4 and 5 show improved examples of the elastic joint of the present invention. FIG. 4 is a plan view thereof, FIG. 5 is a side view thereof, and FIGS. shows the fittings,
FIG. 6 is a plan view thereof, and FIG. 7 is a partially sectional side view thereof. In the figure, symbols 1, 2, 3, 4, 5, 6, 101 are mounting brackets, 7, 8, 9, 10, 11, 12, 102
indicates a rubber member, and 16 and 17 indicate a fixing member.

Claims (1)

[Claims] 1 An even number of mounting brackets of 4 or more and 2 adjacent
It has a substantially polygonal shape consisting of the same number of rubber members as the mounting brackets connected between the two mounting brackets, and the even number of the mounting brackets are connected to the first and second mounting brackets made of every other mounting bracket. The first and second fitting groups form a group of fittings, and the first and second fitting groups are located on two different concentric circles, compressing the fitting group forming a large circle toward the center, and with this compression, An elastic joint characterized in that it is fixed to a fixing member in a state where it is located substantially on the same circle as a group of mounting brackets that formed a small circle that was pushed out to the outer periphery.