JPS6228325B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a rubber coupling.

(Prior Art) An example of a plate-shaped elastic body used in a conventional rubber coupling is shown in FIG. 1 (Japanese Utility Model Application No. 87632/1983). That is, a plurality of sleeves 101a, 101b are embedded in the plate-like elastic body 100 at predetermined intervals in the circumferential direction, and reinforcing material 10 is inserted between adjacent sleeves 101a, 101b.
2 is wrapped around it.

This plate-like elastic body 100 has each sleeve 101
Insert bolts (not shown) alternately into a and 101b,
A rubber coupling is formed by individually connecting the yoke on the drive shaft side or the yoke on the driven shaft side, and has the purpose of elastically connecting both shafts to prevent vibration transmission, and is therefore a plate-shaped elastic body. 100 is desirably made of an elastic body with an appropriately low spring constant value.

However, in the case of such a conventional plate-like elastic body, as shown in FIG. Since the sleeves 101a and 101b are connected to each other, there is a problem in that the drive shaft and the driven shaft do not have sufficient effect to suppress whirling when the shafts rotate with their axes crossing each other.

Here, the whirling phenomenon of the rubber coupling is caused by each sleeve 101a connected to the drive shaft and each sleeve 101a connected to the driven shaft, as described later.
01b are tilted in opposite directions around the center of the plate-like elastic body 100, and rotation is transmitted with the axes intersecting in space. This phenomenon not only requires a large space for installing the rubber coupling, but also
This obstructs smooth transmission of rotational torque.

(Object of the Invention) The present invention has been made in view of the above-described problems in the prior art.The present invention has been made in view of the above-described problems in the prior art. The purpose of this invention is to effectively suppress the relative tilting of the sleeve, thereby solving the above-mentioned problems.

(Embodiments) The present invention will be described below with reference to illustrated embodiments.

FIG. 3 shows a first embodiment of the invention. In the figure, numeral 1 indicates a rubber coupling;
A yoke 4 fixed to the drive shaft 2, a yoke 5 fixed to the driven shaft 3, and a plate-shaped elastic body 6 made of rubber or elastomer and disposed between both yokes 4 and 5.
and a plurality of sleeves 7a, 7b embedded in the plate-like elastic body at predetermined intervals in the circumferential direction, and one stopper plate 8, the sleeve 7a, and one yoke 4 serve as coupling devices. The other stopper plate 10, the sleeve 7b and the other yoke 5 are connected with the bolt and nut 1.
1 and are connected together.

A reinforcing material 12 made of rayon, polyester fiber, or the like is wrapped between the adjacent sleeves 7a and 7b, which are individually connected to the yokes 4 and 5. The reinforcing material 12 is wrapped around the pair of adjacent sleeves 7a and 7b only at both end positions in the axial direction of the plate-like elastic body 6, that is, avoiding the central part, and embedded in the plate-like elastic body 6. It is rare. In the plate-like elastic body 6 shown in FIG. 3, the reinforcing material 12 is an endless annular string-like body, and the sleeve 7b
The reinforcing material 12 is alternately wrapped around the sleeves 7a on both sides at the positions of both ends of the plate-like elastic body 6,
Two reinforcing members 12 between adjacent sleeves 7a and 7b
is wrapped around it.

Next, the effect will be explained.

By rotating the drive shaft 2 in the forward and reverse directions, the stopper plates 8 and 10 normally transmit rotational torque to the driven shaft 3 while the plate-like elastic body 6 is elastically deformed in the circumferential direction without acting on the yokes 4 and 5. However, transmission of minute vibrations is blocked. As the rotational torque increases, reinforcement 1
After the plate-like elastic body 6 is deformed by gradually generating tension in the yokes 2, the stopper plates 8 and 10 directly act on the yokes 4 and 5 to transmit rotational torque. In addition, drive shaft 2
The relative displacement in the axial direction between the driven shaft 3 and the driven shaft 3 is absorbed by the plate-like elastic body 6 being elastically deformed in the shearing direction.

In order to prevent the whirling phenomenon in which the driving shaft 2 and the driven shaft 3 intersect their axes to transmit rotational torque, a reinforcing material is provided between the sleeves 7a and 7b at both ends of the plate-like elastic body 6. 12, the reinforcing material 12 suppresses the prying action of the bolts 9 and 11 on the plate-like elastic body 6, thereby suppressing extreme swinging. That is, when swinging, the adjacent sleeves 7a and 7b tilt in opposite directions with the center of the plate-shaped elastic body 6 as a fulcrum, as shown in FIG. 4, and give a prying effect to the plate-shaped elastic body 6.
At this time, the upper sleeve 7a is moved by the tension of the reinforcing member 12 on the left side in the figure, and the lower sleeve 7a is
The increase in the intersection angle α can be suppressed by the tension of the reinforcing member 12 on the right side in the figure.

Note that an annular groove can be formed on the outer periphery of the sleeves 7a and 7b, and the reinforcing material 12 can be wrapped around the groove.

FIG. 5 shows a second embodiment of the invention. This consists of a yoke 4 fixed to the drive shaft 2 and a driven shaft 3.
A pair of elastic bodies 14 and 15 are arranged between the yoke 5 fixed to the yoke 5 and a pair of elastic bodies 14 and 15 separated by a spacing member 13 to form a plate-like elastic body 16, one of the stopper plates 8, the sleeve 17b, A pin 19 serving as a connecting member is inserted through the spacing member 13, sleeve 17'b, short cylindrical member 18 and one yoke 4, and the other stopper plate 10, sleeve 17a, spacing member 13, sleeve 17'a, short cylindrical member 20 and the other yoke 5, each pin 1
The tips of the yokes 9 and 21 are expanded to connect them individually to the respective yokes 4 and 5, thereby elastically connecting the drive shaft 2 and the driven shaft 3.

Also in this embodiment, adjacent sleeves 17a and 1 are located at both axial end positions of the plate-like elastic body 16, that is, at outer end positions of each elastic body 14 and 15.
By wrapping the reinforcing material 22 between 7'b, 17'a, and 17b, the same effect as in the first embodiment can be obtained regarding prevention of whirling. Further, in this embodiment, reinforcing members 22 are provided at the ends of the pair of elastic bodies 14 and 15;
and a spacing member 13.
Since it is sufficient to provide the reinforcing material 22 at both ends of the elastic bodies 14 and 15, the reinforcing material 22 is provided throughout the elastic bodies 14 and 15.
Even if , the reinforcing members 22 are interposed at both ends of the plate-like elastic body 16 as a whole, so the same effect can be obtained. Note that the reinforcing material 22 is in the form of an endless annular band.

(Structure of the Invention) As explained above, according to the present invention, the structure includes a yoke fixed to a drive shaft, a yoke fixed to a driven shaft, and a plate-shaped elastic body disposed between both yokes. a plurality of sleeves embedded in the plate-like elastic body at predetermined intervals in the circumferential direction; a reinforcing material wrapped around each adjacent sleeve; and a reinforcing material inserted through each sleeve and attached to each yoke. In the rubber coupling having the connecting devices that are individually connected, the reinforcing material is wound only around both ends of the plate-like elastic body.

(Effect of the invention) Therefore, the whirling phenomenon can be prevented without increasing the amount of the plate-like elastic body, changing the material, increasing the amount of reinforcing material, increasing the mounting space, etc., and without reducing the characteristics as a rubber coupling. This results in the effect that rotational torque can be smoothly transmitted from the drive shaft to the driven shaft.

[Brief explanation of the drawing]

Figure 1 is a half cross-sectional view of a conventional plate-like elastic body;
The figure is a cross-sectional view taken along the line -- in Fig. 1, Fig. 3 is a front view showing the first embodiment of this invention, Fig. 4 is an explanatory view of the operation, and Fig. 5 is a part showing the second embodiment of this invention. It is a front view cut away. 1: Mount rubber, 2: Drive shaft, 3: Driven shaft, 4, 5: Yoke, 6, 16: Plate-shaped elastic body, 7
a, 7b, 17a, 17'a, 17b, 17'b:
Sleeve, 12, 22: Reinforcement material, 9, 11: Bolt/nut (connector), 19, 21: Pin (connector).

Claims (1)

[Claims] 1. A yoke fixed to the drive shaft, a yoke fixed to the driven shaft, a plate-shaped elastic body disposed between both yokes, and a plate-shaped elastic body disposed at a predetermined interval in the circumferential direction. A rubber coupling having a plurality of sleeves, a reinforcing material wrapped between adjacent sleeves, and a connector inserted through each sleeve and individually connected to each yoke,
A rubber coupling characterized in that the reinforcing material is wound only around both ends of a plate-like elastic body.