JP2000283173A - Shaft coupling for absorbing shock and for preventing excessive load by rope and spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb shock by fixing one end of a rope to an inner cylinder, and supply the other end in the circumferential direction with a block connected to an outer cylinder, and fixing it to the outer cylinder, spring holding tools, or a spring through the block for changing the direction in the parallel direction. SOLUTION: One end of a rope 3 is fixed to an inner cylinder 1, and the other end is supplied to the circumferential direction by a block 5 connected to an outer cylinder 2, and is fixed to the outer cylinder 2, a spring holding tool 7 connected thereto, a spring holding tool 8 (a, b) fluctuated by expansion and contraction of a spring 4, or a spring 4 through a block 6 for changing the direction in a parallel direction. A ring shaped striker 11 is connected to the spring holding tool 8, or a part of the spring holding tool 8 is utilized as a striker, and thereby, a limit switch 12 is operated at the time of an over load, and a power supply is turned off. It is thus possible to smoothly absorb the shock from a mechanism disposed in the rear of a brake function, the shock caused by lack of the brake function, and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft coupling for absorbing shock and preventing overload.

[0002]

2. Description of the Related Art Conventionally, there are a fluid coupling and a rubber coupling which utilize a spring of a rubber, and a shaft coupling which absorbs shock and prevents an overload includes a multi-plate friction type. .

[0003] In the conventional fluid coupling, when the idling time after the driving machine is stopped is long and the brake function is provided,
It must be installed on the drive side before the brake function, it can not absorb the shock of the mechanism after the brake function or the shock absorption due to the inadequate brake function, and the one using the elasticity of rubber, The rotation angle effective for absorbing shock is too small. In the multi-plate friction type, smooth shock absorption cannot be performed stepwise.

[0004] The present invention employs a rotation angle effective for shock absorption, which has never existed before, to absorb shock due to a mechanism behind the brake function or shock due to inadequate brake function. The purpose is to prevent overload by turning off the power of the drive unit.

[0005]

In order to achieve the above-mentioned object, a shaft coupling according to the present invention comprises an inner cylinder and an outer cylinder each having a driving machine,
Or connect the shaft of the non-driving machine, fix one end of the rope to the inner cylinder, send the other end in the circumferential direction by a pulley connected to the outer cylinder, and further through a pulley that changes direction in the parallel direction ,
It is fixed to an outer cylinder, a spring holder connected to the outer cylinder, a spring holder that swings by expansion and contraction of the spring, or a spring.

The above-mentioned rope has a function of transmitting rotational power by pulling the inner cylinder and the outer cylinder in the circumferential direction. The pair of functional bodies are straight in the circumferential direction, and a plurality of functional bodies are provided on the circumference. By arranging them at equally divided positions, it is possible to prevent the generation of axial thrust and bending force.

The rotation angle effective for absorbing shock by the shaft coupling of the present invention is such that when the inner cylinder and the outer cylinder rotate by pulling the rope, the object connected to the inner cylinder and the outer cylinder is about 360 degrees. Since it is thought that there is no interference due to the rotation difference, a plurality of springs or one strong spring is arranged in parallel with the outer cylinder, and a plurality of pulleys are mounted on the spring holder that swings by the expansion and contraction of the spring. Can be adjusted by fixing one end of the rope through these pulleys to the outer cylinder or a spring holder connected to the outer cylinder.

Further, by connecting a ring-shaped striker to a spring holder which swings due to the expansion and contraction of the spring, or by using a part of the swinging spring holder as a striker, the limit switch can be operated in the event of an overload. It can be operated to turn off the drive.

Embodiments of the present invention will be described with reference to the drawings based on embodiments. In FIG. 1, a shaft coupling A is directly connected to a driving machine B, and power is transmitted to a non-driving machine C.

In the embodiment shown in FIG. 2, one end of the rope 3 is fixed to the inner cylinder 1 and the other end is fed in the circumferential direction by a pulley 5 connected to the outer cylinder 2 and further turned in the parallel direction. The outer cylinder 2 or a spring holder 7 connected to the outer cylinder 2, a spring holder 8 that swings due to expansion and contraction of the spring 4, or a spring 4 via a pulley 6 that performs the following operations. Further, by connecting a ring-shaped striker 11 to a spring holder 8 that swings due to expansion and contraction of the spring 4, or by using a part of the spring holder 8 that swings as a striker, a limit switch can be provided during overload. 12 is operated to turn off the power of the driving machine B.

In the embodiment shown in FIG. 3, a plurality of springs 4 and a strong single spring 4 are arranged in parallel with the outer cylinder 2 and a plurality of spring holders 8 which swing by the expansion and contraction of the springs 4 are provided. Pulley 9
And connect one end of the rope 3 through these pulleys 9
It is fixed to the outer cylinder 2 or a spring holder 7 connected to the outer cylinder 2.

Since the present invention is configured as described above, it has the following effects.

By using a rope and a spring for the shaft coupling, it is possible to smoothly absorb shocks to a mechanism subsequent to the brake function and shocks due to insufficient brake function.

By expanding and contracting the spring with the rope and the plurality of pulleys, it is possible to have a rotation angle effective for absorbing a considerably large impact, and since this angle can be adjusted, it can be adjusted to a wide variety of types. Can be used.

Further, at the time of overload, the limit switch is actuated by swinging of the spring holder to turn off the power supply, thereby preventing overload.

[Brief description of the drawings]

FIG. 1 is a layout view showing a usage example of a shaft coupling.

FIG. 2A is a longitudinal sectional view showing an embodiment of a shaft coupling. (B) is DD sectional drawing in (a).

FIG. 3 is a sectional view taken along line EE in FIG. 2 (a).

[Explanation of symbols]

 Reference Signs List A shaft coupling B drive machine C non-drive machine 1 inner cylinder 2 outer cylinder 3 rope 4 spring 5, 6, 9, 10 pulley 7, 8 spring holder 11 striker 12 limit switch 13, 14 fixing bracket

Claims (3)

[Claims] 1. An end of a rope (3) is fixed to an inner cylinder (1), and the other end is fed in a circumferential direction by a pulley (5) connected to an outer cylinder (2), and further directed in a parallel direction. A spring holder (7) connected to the outer cylinder (2) or the outer cylinder (2) through a pulley (6) for conversion, a spring holder (8) that swings by expansion and contraction of the spring (4), Alternatively, a shaft coupling that transmits rotational power by absorbing the inner cylinder (1) and the outer cylinder (2) in the circumferential direction by fixing the inner cylinder (1) and the outer cylinder (2) by fixing to the spring (4). 2. A plurality of springs (4) parallel to the outer cylinder (2);
Or arrange a strong single spring (4), and the spring (4)
A plurality of pulleys (9) are connected to a spring holder (8) that swings due to the expansion and contraction of the outer cylinder (2) or the outer cylinder (2) through one end of the rope (3) through these pulleys (9). 2. The shaft coupling according to claim 1, wherein the shaft coupling is fixed to a spring holder connected to the shaft. 3. A ring-shaped striker (11) is connected to a spring holder (8) that swings due to expansion and contraction of a spring (4), or a part of the swinging spring holder (8) is used as a striker. By using, at the time of overload, the limit switch (12) is operated to turn off the power of the driving machine (B),
3. The shaft coupling according to claim 1, which prevents overload.