JPS6211906Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a crane that travels on rails.

[Background of the idea]

Conventionally, there have been two types of crane traveling devices, one shown in FIG. 1 and the other shown in FIG. In the system shown in FIG. 1, a shaft 3 supported by a bearing 8 is rotated by a motor 6 via a reducer 4 on a crane A, and both wheels 2a and 2b attached to the shaft 3 are connected to one rail 1a and the other. It is rotatably driven on the rail 1b.

What is shown in Fig. 2 is a system in which both wheels 2a and 2b attached to a crane A are connected to both rails 1 and 1 on one side and the other side.
a, 1b, one motor 6a attached to crane A rotates the wheel 2a via the reducer 4a, and the other motor 6b also attached to the crane A rotates the wheel 2a via the reducer 4b. Crane A was driven by rotating 2b.

In the one shown in FIG. 1, both wheels 2a and 2b are driven by one motor 6, so both wheels 2a and 2b rotate at the same speed. For this reason, a skew phenomenon in which one wheel moves too quickly than the other wheel and the crane A becomes diagonal with respect to the rails 1a and 1b is less likely to occur. However, there is a drawback that once skew occurs, it cannot be corrected.

In the one shown in Fig. 2, since both wheels 2a and 2b are driven by separate motors 6a and 6b, it is possible to correct the skew of the crane A, but it is possible to correct the imbalance of the load on the two wheels, the slippage of the wheels, and the motors 6a and 6b. 6
A skew phenomenon is likely to occur due to the slight difference in rotational speed of b.

When this skew occurs, it becomes difficult to accurately position the crane at a specific position or to smoothly accelerate and decelerate the crane.

[Purpose of invention]

The purpose of the present invention is to prevent the occurrence of skewing of a crane, and also to enable correction when skewing occurs.

[Summary of the idea]

The present invention provides a crane equipped with one motor that drives wheels that roll on one rail and another motor that drives wheels that roll on the other rail, by connecting both motors via a clutch. This is a crane traveling device that is characterized by being connected to the

[Example of idea]

An embodiment of the present invention will be described below based on FIG. 2.

As shown in FIG. 2, crane A that runs on both rails 1a and 1b having wide spans has two motors 6a and 6b and two reducers 4a and 4.
b are installed symmetrically. One end of the rotating shaft of the motor 6a is connected to the input rotating shaft of the reducer 4a, and the axle of the wheel 2a is connected to the output rotating shaft of the reducer 4a via a coupling 7a. This wheel 2a is placed on one rail 1a.

One rotating shaft end of the other motor 6b is connected to the input rotating shaft of the reducer 4b, and the output rotating shaft of the reducer 4b is connected to the wheel 2b via a coupling 7b.
the axle is connected. This wheel 2b is placed on the other rail 1b.

A shaft 10 disposed between both motors 6a, 6b is rotatably supported by a crane A by a bearing 8.

The other rotating shaft end of the motor 6a is connected to a clutch 9a via a coupling 7c, and one end of a shaft 10 is also connected to this clutch 9a.

The other rotating shaft end of the motor 6b is connected to a clutch 9b via a coupling 7d, and the other end of the shaft 10 is also connected to this clutch 9b.

In this embodiment, the crane A normally operates the clutches 9a and 9b in the connected state and then starts both the motors 6a and 6b, thereby controlling the rotation of both the motors 6a and 6b through the reducers 4a and 4b. The rails 1a, 1 are transmitted by transmitting the information to the wheels 2a, 2b.
Travel on b. During this normal running, since both motors 6a and 6b are connected by shaft 10 via clutches 9a and 9b, both wheels 2a and
Since the rotational speeds of cranes 2b and 2b match, crane A can travel while smoothly accelerating and decelerating in a state where skewing is less likely to occur.

In addition, once the crane A starts to skew, the clutches 9a and 9b are disengaged to eliminate the connection between the motors 6a and 6b. After that, the motor 6a drives the wheel 2a and the motor 6b drives the wheel 2b independently, thereby correcting the skew of the crane A.

In addition, reduction gears 4a, 4b, and motors 6a,
Since the crane 6b is provided inside the rails 1a and 1b, the length of the crane in the direction perpendicular to the rails can be shortened.

Further, the two motors 6a and 6b are motors having output shafts at both ends, and the output shafts of the two motors are positioned on the same line, and the output shafts between the two motors are connected via clutches 9a and 9b. Since they are connected by a shaft 10, the length of the shaft can be shortened.

[Effect of idea]

As described above, according to the present invention, since it is possible to select between synchronization and independent drive of both wheels of the crane, it is possible to achieve the effect that the crane can run smoothly and the skew of the crane can be corrected. . Moreover, the length of the crane and the length of the connecting shaft can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a plan layout of a conventional crane traveling device, FIG. 2 is a plan layout of another conventional crane traveling device, and FIG. 3 is a plan layout of a crane traveling device according to an embodiment of the present invention. It is a diagram. 1a, 1b...Rail, 2a, 2b...Wheel,
4a, 4b...reducer, 6a, 6b...motor, 7a, 7b, 7c, 7d...coupling,
8...Bearing, 9a, 9b...Clutch, 10...
Shaft.

Claims (1)

[Claims for Utility Model Registration] One motor drives wheels rolling on one rail through one speed reducer, and one motor drives wheels rolling on the other rail through another speed reducer. In the crane, the one motor and the other motor are motors each having an output shaft at both ends, and the respective motors and the respective reducers are arranged inside the respective rails. The rotating shaft is arranged in a direction perpendicular to the rail and in a horizontal direction, and the output shaft of each motor is arranged in the same line, and the output of each motor is directed toward the rail. A traveling device for a crane, characterized in that each of the reduction gears is mounted on a shaft, and the output shafts of the respective motors on the other side are connected to each other by the shaft via a clutch.