JP2000220656A - Tier coupling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable tier coupling by providing a key dropping- out preventing plate larger than the diameter of a rotating shaft over both lateral inner surfaces of a bolt mounting annular metal fitting, and setting the space between the shaft end of the rotating shaft and the key dropping-out preventing plate to less than the length of a key. SOLUTION: In the fixing structure of a flange 1 to a rotating shaft 8a, a rotating shaft 8b is inserted to the flange 1, a key 7 is inserted into a key groove 10 from the rubber tire 3 side, and fastened and pressed by a key fixing bolt 6 to fix the rotation, and a fastening bolt 4 is passed through a bolt hole 9 to fasten the flange 1 to the rubber tire 3. A key dropping-out preventing plate 5 larger than the diameter of the rotating shaft is provided over both lateral inner surfaces of bolt mounting annular metal fittings 2a, 2b, and the space between the shaft end 12 of the rotating shaft 8b and the key dropping-out preventing plate 5 is set to less than the length of the key 7. Namely, since the movement of the key 7 is prevented by the dropping-out preventing plate 5 even if the key fixing bolt 6 is loosened to move the key 7 toward the rubber tire 3, the key 7 is never dropped into the rubber tire 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a tire coupling used for a shaft coupling.

[0002]

2. Description of the Related Art In an actual rotating machine, it is extremely difficult to completely match the centers of two axes. For this reason, a shaft joint having a structure capable of permitting displacement of the shaft center is used, and typical examples of the joint include a flange-type flexible joint, a gear-type shaft joint, a chain shaft joint, and a rubber shaft joint. Rubber joints include star-shaped rubber joints and tire-type rubber joints.These are about half the permissible rotational force and permissible rotational speed of flange-type shaft joints with the same shaft diameter, but because of their good flexibility,
It is often used in cases where there is a relative misalignment or where vibration is severe. For example, as shown in FIG.
1 and a pulse generator 22 for detecting the rotation speed of the motor 21, such as a joint of a rolling equipment, an auxiliary mechanical system, and a portion connecting a reduction gear to a reduction gear.

[0003] A conventional shaft coupling of a tire coupling 20 comprises a pair of left and right flanges 1a, 1b and rotary shafts 8a, 8b.
Is fixed to the rotating shafts 8a and 8b.
After the key 7 is inserted into the key groove 10, the key 7 is fixed by crimping around the flange 1 with the key fixing bolt 6 to prevent the key 7 from coming out.
Stopping or vibration causes the key fixing bolt 6 to be loosened, causing the key 7 to move inside the rubber tire 3 and finally causing the key 7 to fall into the rubber tire 3.

[0004]

As described above, tire couplings are repeatedly used for starting and stopping, and are often used in places where vibrations are large. Therefore, if the key fixing bolt gradually loosens and a joint failure occurs, especially if it is used in many places such as rolling equipment, even if the failure frequency is small, the entire rolling equipment stops and the damage is extremely large Therefore, improvement to a more perfect tire coupling has been awaited.

An object of the present invention is to provide a tire coupling with higher reliability in order to solve the above problems.

[0006]

The means of the present invention comprises a pair of left and right flanges having a plurality of bolt holes on the periphery and a rubber tire fixed on both sides by bolt mounting annular metal fittings. After the shaft is inserted and the rotation is fixed with a key from the rubber tire side, a fastening bolt is passed through the bolt hole to fasten the flange to the rubber tire. A tire coupling in which a key drop prevention plate larger than the diameter of the rotation shaft is provided on an inner surface, and a distance between a shaft end of the rotation shaft and the key drop prevention plate is less than a key length.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIG. The tire coupling 20 of the present invention is composed of a pair of left and right flanges 1a and 1b having a plurality of bolt holes 9 in a peripheral portion, and a rubber tire 3 fixed on both sides by annular bolt fittings 2a and 2b. The fixing structure of the flange 1 and the rotating shaft 8 is such that the rotating shaft 8 is inserted into the flange 1, the key 7 is inserted into the key groove 10 from the rubber tire 3 side, and tightened and crimped with the key fixing bolt 6 to rotate. A tire coupling 20 for fixing and fastening the flange 1 and the rubber tire 3 by passing a fastening bolt 4 through the bolt hole 9, and in particular, to the right and left inner surfaces of the bolt mounting annular metal fittings 2 a and 2 b. A key drop prevention plate 5 larger than the diameter of the rotating shaft is provided, and the distance between the shaft end 12 of the rotary shaft 8 and the key drop prevention plate 5 is less than the key length.

That is, even if the key fixing bolt 6 is loosened and the key 7 moves to the rubber tire 3 side, the key 7 is prevented from moving by the fall prevention plate, so that the key 7 falls into the rubber tire 3 absolutely. There is no structure. In general, the rubber tire 3 has a tire reinforcing cord 11 embedded in rubber and does not limit the material of the key drop-prevention plate 5. However, the key drop-prevention plate 5 may be made of a thin steel plate. I just need.

Next, the tire coupling 20 of the present invention will be described.
Will be described. First, the flange 1 is inserted into the rotating shaft 8. After that, the key 7 is driven into the key groove 10 of the rotating shaft 8 from the flange 1 side, and the flange 1 is fixed to the rotating shaft 8. Next, a fastening bolt 4 is passed through a bolt hole 9 to fix the rubber tire 3 composed of a key drop-prevention plate 5 attached to a bolt mounting ring by welding or the like. Thereafter, the key fixing bolt 6 provided on the outer peripheral portion of the flange 1 is tightened to prevent the key 7 from coming off.

[0010]

When the tire coupling of the present invention is used, even if the key is loosened during the rotation of the rotating shaft and the key moves, the key is prevented from moving by the key falling-off prevention plate. The phenomenon of keys falling out and falling inside is completely eliminated. Therefore, troubles such as malfunction of the device can be prevented without causing the rotating shaft and the flange to rotate idly due to the key falling off.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a tire coupling for explaining the present invention.

FIG. 2 is a front view illustrating a use state of the tire coupling.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flange 2 Bolt mounting annular metal fitting 3 Rubber tire 4 Fastening bolt 5 Key drop prevention plate 6 Key fixing bolt 7 Key 8 Rotating shaft 9 Bolt hole 10 Key groove 11 Reinforcement cord 12 Shaft end 20 Tire coupling 21 Motor 22 Pulse generator

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Toshinori Murakami 11-1, Showa-cho, Kure-shi, Hiroshima Nisshin Steel Co., Ltd. Kure Works

Claims (1)

[Claims] 1. A pair of left and right flanges (1a, 1b) provided with a plurality of bolt holes (9) in a peripheral portion, and a rubber tire (3) fixed on both sides by annular bolt mounting brackets (2a, 2b). After the rotation shafts (8a, 8b) are inserted into the flanges (1a, 1b) and the rotation is fixed from the rubber tire (3) side with a key (7), the bolt holes (9) are fixed.
Through a fastening bolt (4) through the flange (1a,
1b) In the tire coupling (20) for fastening the rubber tire (3), a key drop prevention plate (5) larger than the rotation shaft diameter is provided on both left and right inner surfaces of the bolt mounting annular metal fittings (2a, 2b). A tire coupling in which the distance between the shaft end (12) of the rotating shaft (8) and the key falling-off prevention plate (5) is less than the key length.