JP2005263420A - Structure of winch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a collectively transmitted running torque applied to a drum of a winch of which weight is increased following the increase of weight and craning of a crane and increase of the speed of lifting, and to reduce torsion acting on the drum. <P>SOLUTION: The winch comprises the drum, a motor, and a speed reduction means which is disposed between the drum and motor and transmits the rotation of the motor to the drum. The drum has different motors on both sides in the axial center direction of a rotating shaft, the drum and the motors are arranged on the same axial center of the rotating shaft, and rotations of the motors are transmitted to both sides of the drum. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a winch structure used for winding a wire rope such as a climbing crane.

The crane used to assemble high-rise buildings is fixed to the floor of the building under construction and works as the building gets taller as the building progresses. There is a climbing crane that is fixed to the floor and is used for work.
In recent years, there has been a demand for shortening the construction period in building work, and there is a strong demand for increasing the size of suspended loads that are lifted by a crane, in this case, building materials, building blocks, and the like, and shortening the lifting work time.
In order to cope with this, it is necessary to increase the weight of lifting gravity and increase the hoisting speed in the climbing crane.

FIG. 5 shows the structure of a lifting / lowering winch device for a conventional climbing crane. In FIG. 5, the winch device includes a motor 102 as a driving source and a drum 101 around which a wire rope is wound, and the rotation of the output shaft of the motor 102 is performed through a reduction gear 103 by a multistage reduction mechanism using gears. Is transmitted to.
As shown in FIG. 5, in the conventional winch, the output of the motor 102 is applied to the input shaft of the drum 101 as rotational torque via a reduction gear.
In addition to using the multistage reduction mechanism as the reduction means as described above, there is a structure in which the rotation of the motor is transmitted to the drum using a planetary gear mechanism as disclosed in Patent Document 1.
JP 2000-118959 A

The input shaft of the drum has a drum body connected to one end and a reduction gear connected to the other end. In order to reduce the construction period as described above, a large motor is used to load a heavy load. In order to wind up at a high speed, a large load of a large motor acts as an extremely strong rotational torque on the input shaft of the drum.
As a result, the input shaft of the drum is twisted due to rotational torque, a tough structure is required, the diameter of the input shaft of the drum is increased, and the drum itself is increased in size.

  When a planetary gear mechanism is used as a speed reduction means, the winch structure is a structure in which an internal gear meshing with an external gear rotating by the output of a motor is coupled to the drum, and the rotation of the motor is transmitted to the drum itself. As a result, the transmission of rotational torque is not concentrated in one place such as the shaft, so it is possible to prevent local twisting of the input shaft of the drum. However, the rotation of the motor is concentrated on one side of the drum. Since the torque is transmitted, the twist acting on the drum itself is not eliminated.

  Accordingly, an object of the present invention is to reduce the rotational torque transmitted in a concentrated manner applied to a heavy drum and to reduce the twist acting on the drum as the crane is increased in weight and speeded up and down. Thus, the device itself can be reduced in size and weight.

In order to solve the above problems, the present invention provides:
A winch comprising a drum that winds a wire rope, a motor that rotates the drum, and a speed reduction unit that is provided between the drums and transmits the rotation of the motor to the drums. Each motor is provided with a separate motor, and the drum and the motor are disposed on the same rotational axis.

Further, the present invention is characterized in that brake means are provided between the speed reduction means provided at both ends of the drum and the motor, respectively.

  The planetary gear includes a sun gear provided on an output shaft of the motor, and a planetary gear that meshes with the sun gear and transmits the rotation of the motor to the end face of the drum by rotating around the sun gear. It is formed by a gear mechanism.

According to the present invention, since the rotational torque applied to the drum acts not only from one end side of the drum but also from both ends of the drum, the rotational torque from the motor can be transmitted to the drum without adding twist to the drum itself. It becomes possible. Thereby, size reduction and weight reduction of a winch apparatus are realizable. Further, since a large twisting action does not occur in the drum, the durability of the winch is improved and the mechanical life is prolonged.
Since the motor and drum are arranged on the same axis of rotation and a planetary gear mechanism with a reduction gear inside the drum is used as the speed reduction means, it becomes a compact winch structure in the axial direction of the axis, and the turning body of the climbing crane turns It is possible to reduce the radius, and there is no contact with surrounding structures at the time of construction, and a climbing crane capable of lifting a heavy weight even in a narrow construction site can be used.

  By using two motors and providing a drum drive source in two systems, one of the motor side troubles, such as failure of incidental equipment such as motors and inverters, disconnection of electrical supply such as disconnection, etc. Even if one of the motors stops operating, the other motor can transmit the rotational force to the drum, so it is possible to perform lifting and lowering work of small weights continuously according to the motor capacity of one unit. Can be stopped completely.

  Since two small motors with high versatility are used as a power source, it is easier to obtain the motor and it is cheaper than using one special large motor. In addition, a small motor used in a conventional crane can be diverted, and when replacing the motor due to a failure or aging of the motor, the motor can be easily obtained, and the winch device can be restored quickly.

Also, since the brake means uses two brakes having a small braking force like the motor, even if a failure occurs in one brake, one motor is driven by the other brake compared to using a brake having a large braking force. A braking force can be applied to.
By using two motors with the same capacity and type, spare parts can be shared, and parts management and storage space can be easily secured.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a side view of an embodiment of the present invention.
FIG. 2 shows a cross-sectional view of an embodiment of the present invention.
FIG. 3 shows a plan view of a swing body of a climbing crane using the apparatus of the present invention.
FIG. 4 shows a side view of a swing body of a climbing crane using the apparatus of the present invention.
3 and 4 has a winch frame 9 provided with a winch device that is provided at the top of the climbing crane and supports the crane jib 8 and winds and feeds the wire rope. Rotate to carry suspended loads.

The winch device provided in the swivel body 7 is provided on a winch frame 9 as shown in FIG.
The drum 1 is provided substantially at the center of the winch frame 9, and motors 2a and 2b having the same capacity are provided on the opposite ends of the drum 1 in the direction of the axis of rotation, respectively, with a same axis of rotation via speed reduction means. ing. Two speed reduction means 3a and 3b provided at both ends of the drum 1 are provided, one part being fixed to the end of the drum 1 and the other part being fixed to the support bracket 10 to one motor. Yes. The two motors 2a and 2b provided at both ends of the drum 1 have an output shaft 11 that outputs rotation extended to the drum 1 side and connected to the speed reduction means 3a and 3b via the brake means 6a and 6b, respectively. Is done. In one speed reduction means 3, a sun gear 4 is attached to one end of the output shaft 11 of the motor 2 on the drum side, and rotates around the same rotational axis as the motor 2.

A planetary gear 5 that meshes with and engages with the sun gear 4 is provided, and the planetary gear 5 is provided to rotate via the sun gear 4 by the rotation of the motor 2.
The planetary gear 5 is provided rotatably on the rotating member 12 and meshed with an internal gear 14 provided on a rotation output member 21 fixed to the drum 1. When the planetary gear 5 is rotated, the planetary gear 5 is rotated about the axis of rotation of the sun gear 4 along the internal gear 14, and the rotating member 12 is rotated about the axis of the axis.

The rotation member 12 provided with the planetary gear 5 includes a rotation member gear 17 facing outward on the axial direction motor side. A second planetary gear 18 is engaged with the rotating member gear 17, and the second planetary gear 18 is rotated via the rotating member gear 17 by the rotation of the rotating member 12, as in the planetary gear 5. Is made to rotate.
The second planetary gear 18 is rotatably provided on the fixing member 13 fixed to the winch frame 9 and is provided so as to mesh with the internal gear 14 provided on the rotation output member 21.

The rotation output member 21 is connected to the drum body 1, and the internal gear 14 is rotated by the rotation of the second planetary gear 18, so that the drum body 1 is rotated.
As shown in FIG. 2, the speed reduction means 3 of this embodiment has two sets of combinations of the sun gear 4 and the planetary gear 5 so as to decelerate the rotation of the motor 2 in two stages. The present invention is not limited to this, and one-stage deceleration or multi-stage deceleration may be performed as necessary.

The operation of this embodiment will be described.
When the winch device is operated to wind the wire rope, the two motors 2a and 2b are driven to rotate the motor output shaft 11. At this time, the two motors 2a and 2b are simultaneously driven to transmit the rotation to the respective speed reduction means 3a and 3b provided at both ends of the drum 1. Hereinafter, the operation of one of the two speed reducers will be described.
Due to the rotation of the motor output shaft 11, the sun gear 4 fixed to the motor output shaft 11 rotates.
When the sun gear 4 rotates, the planetary gear 5 provided in mesh with the sun gear 4 rotates.
Since the planetary gear 5 is provided so as to mesh with the internal gear 14 provided in the rotation output member 21, the planetary gear 5 rotates along the external teeth provided on the outer periphery of the sun gear 4.
When the planetary gear 5 is rotated, the rotating member 12 including the planetary gear 5 is rotated around the axis, and the rotation is reduced and transmitted by the gear ratio.

Further, when the rotating member 12 rotates, the second planetary gear 18 that meshes with the rotating member gear 17 provided in the rotating member 12 rotates. The second planetary gear 18 is provided on the fixing member 13 fixed to the support bracket 10, is rotatably fixed, and is engaged with the internal gear 14 provided on the rotation output member 21. The second planetary gear 18 rotates without rotating.
As the second planetary gear 18 rotates, the rotation output member 21 is rotated via the internal gear 14, and the rotation is reduced and transmitted by the gear ratio.
The rotation output member 21 is connected to the drum 1, and the drum 1 is rotated by the rotation of the rotation output member 21.

As described above, the rotation of the motors 2a and 2b is transmitted to the drum 1. At this time, by providing one motor 2a, 2b on each side of the drum 1, the rotation of each motor 2a, 2b can be transmitted to both sides of the drum 1 at the same time. It will be resolved.
Further, since the speed reducing means is formed in the planetary gear mechanism, the rotational torque of the motor is distributed and transmitted, and the rotational torque is not concentrated on the drum shaft.

In this embodiment, the two motors arranged on both sides of the drum are configured using the same capacity, but the present invention is not limited to this, and two motors having different capacities may be used. Similar actions and effects can be obtained.

The side view of the winch apparatus of the Example of this invention is shown. 1 shows a cross-sectional view of an embodiment of the present invention. The top view of the turning body of a climbing crane using the device of the present invention is shown. Sectional drawing of the turning body of the climbing crane using the apparatus of this invention is shown. Sectional drawing of the conventional winch apparatus is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum 2 Motor 4 Sun gear 5 Planetary gear 6 Brake means 12 Rotating member 13 Fixing member 14 Internal gear 18 Second planetary gear 21 Rotation output member

Claims (4)

A winch comprising a drum that winds a wire rope, a motor that rotates the drum, and a speed reduction unit that is provided between the drums and transmits the rotation of the motor to the drums. A winch comprising different motors, wherein the drum and the motor are disposed on the same rotational axis. The winch according to claim 1, further comprising a brake unit between a motor and a speed reduction unit provided at both ends of the drum. A planetary gear mechanism having a sun gear provided on the output shaft of the motor, and a planetary gear that meshes with the sun gear and transmits the rotation of the motor to the end face of the drum by rotating around the sun gear. The winch according to claim 1, wherein the winch is formed by: The winch according to claim 1, wherein the two motors have the same output.

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