JP2001270686A - Winch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compacted winch device capable of rotating a winch drum to be rotated by a planetary reduction mechanism, independently from the planetary reduction mechanism. SOLUTION: A motor 3 for driving a winch drum 2, and a carrier shaft 14 of the planetary reduction mechanism 6 are mounted on one of fixing parts 11, one end of the winch drum 2 and one end of a ring gear 27 forming the planetary reduction mechanism 6 are respectively rotatably supported on a boss part 11a of one of the fixing parts 11, a torque shaft 7 integrated with the ring gear 27 is rotatably supported on the other fixing part 12, and the other end part of the winch drum 2 is rotatably supported on the torque shaft 7. The rotation of the torque shaft 7 is transmitted to the winch drum 2 through an internal expanding band clutch 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winch device, and more particularly, to a load acting on a winch when a winch drum of a winch device used for a crane or the like is disconnected from the drive unit. The present invention relates to a winch device in which the ability to rotate freely (drum-free property) is maintained and the size of the device is reduced.

[0002]

2. Description of the Related Art In recent years, a winch device capable of being drum-free in a crane or the like has been downsized by incorporating a planetary reduction mechanism for reducing the rotation of a motor and transmitting the rotation to the winch drum in the winch drum of the winch device. Is being planned. As this type of winch device, a winch drum and a carrier shaft of a planetary reduction mechanism are integrated or a winch drum and a ring gear of a planetary reduction mechanism are integrated. In the winch device, when the winch drum is cut off from the drive unit and freely rotates by a load, that is, in a so-called drum-free state, the planetary reduction mechanism and the brake drum, or the planetary reduction mechanism and the brake plate are rotated together with the rotation of the winch drum. Due to high-speed rotation, the inertia and rotation resistance of these rotating members increase, making it difficult to obtain a sufficiently free state of the winch drum, shortening the life of planetary reduction mechanism parts, and generating loud noise. And the like.

[0003] Therefore, an inner expansion band clutch is pressed against the inner surface of the cylindrical portion of the winch drum to transmit the rotation of the motor decelerated by the planetary reduction mechanism to the winch drum, and the inner expansion band clutch is loosened. In addition, a winch device has been proposed in which a winch drum is rotatable independently of the planetary speed reduction mechanism to solve the above-mentioned drawback (Japanese Patent Application Laid-Open No. 58-162497).

[0004]

In the winch device using the above-described inwardly expanding band clutch, a winch drum is provided with a planetary speed reduction mechanism and a motor decelerated by the planetary speed reduction mechanism. It is necessary to provide an output shaft (drum shaft) for transmission to the motor. That is, in the winch drum, at least two bearings spaced at a predetermined interval are required to support the output shaft, and in the winch drum, in addition to the space for the planetary reduction mechanism, Requires a certain amount of space for holding the output shaft. For this reason, the size of the winch drum is affected not only by the size of the planetary speed reduction mechanism but also by the spacing of the bearings supporting the output shaft, or by increasing the number of bearings, the structure of the winch device, There was a disadvantage that the shape became complicated.

[0005] Therefore, while the winch drum of the winch device has a sufficient drum-free function, there arises a technical problem to be solved in order to realize a compact winch device. The purpose is to solve.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and comprises a winch drum on which a rope is wound around a winding drum, a motor for rotating the winch drum, and a motor. A planetary reduction mechanism for reducing the rotation of the motor, a clutch for transmitting the rotation of the output shaft of the planetary reduction mechanism to the winch drum so as to be able to turn on and off, and braking means for braking the rotation of the winch drum; In a winch device in which a speed reduction mechanism is built in the winding drum and the winch drum is rotatable independently of the planetary speed reduction mechanism, the planetary speed reduction mechanism is configured to rotatably support both sides of the winch drum. And a ring gear to which the rotation of the motor is reduced and transmitted via a plurality of planetary gears, and the carrier shaft is integrally supported by the fixed portion of The motor and the carrier shaft of the planetary reduction mechanism are integrally provided on one of the fixed portions, and the boss portion of the one fixed portion is provided on the boss portion of the one fixed portion. The other end of the ring gear and the other end of the winch drum are rotatably supported, and the other of the fixed portions rotatably supports the output shaft on the other fixed portion. A winch device rotatably supporting the other end of the winch drum, and the winch drum has a cylindrical portion for an inflatable band clutch, and the inflatable band clutch is provided on the output shaft. A winch device for transmitting the rotation of the motor decelerated by the planetary speed reduction mechanism to the winch drum, wherein the inner expansion band clutch presses against the inner peripheral surface of the cylindrical portion; A winch drum having a cylindrical portion for braking, and wherein the braking means is a band brake wound around the outer peripheral surface of the cylindrical portion, wherein the band brake brakes the rotation of the winch drum; and A wet multi-disc brake that permits or brakes the rotation of the motor in conjunction with the start and stop of the motor in a state where the inner expansion band clutch is pressed against the inner peripheral surface of the cylindrical portion of the winch drum. And
The wet multi-plate brake provides a winch device for braking the rotation of the winch drum.

[0007]

An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, a winch device 1 includes a winch drum 2 and a motor 3 for driving the winch drum 2.
A planetary reduction mechanism 6 for reducing the rotation of the motor shaft 5 of the motor 3, and a torque shaft 7 as an output shaft of the planetary reduction mechanism 6. The motor shaft 5 includes a support shaft 5a provided in the motor 3 and a support shaft 5b connected to the support shaft 5a.

Further, the winch device 1 has an inwardly expanding band clutch (rotation transmitting means) 9 for transmitting the rotation of the torque shaft 7 to the winch drum 2 so as to be freely turned on and off, and brakes the rotation of the winch drum 2. A band brake (braking means) 10.

The winch drum 2 is fixed by a pair of fixing portions 11 and 12 erected on a bottom plate (not shown).
It is rotatably supported as described below. The motor 3 is attached to one of the fixing portions 11 (the left fixing portion in the figure) 11 by bolts 13, 13.
... is fixed.

The one fixed part 11 is connected to the other fixed part 1.
It has a boss 11a facing the two sides, and a carrier shaft 14 is integrally provided in the boss 11a while being prevented from rotating by a spline 15. The winch drum 2 integrally includes a winding drum 2a, a drop prevention claw 2b integrally formed on both sides of the winding drum 2a, and a side plate 2c. On the outer surface of the side plate 2c, a clutch cylindrical portion 18 and a brake cylindrical portion 19, which will be described later, are integrally provided coaxially. The winch drum 2
At the end of the ratchet wheel 2b side, a holder 16 is provided with a bolt 17,
The holder 16 is rotatably mounted on the outer peripheral surface of the boss portion 11a of the fixed portion 11 by a bearing 20.

The inwardly expanding band clutch 9 provided integrally with the torque shaft 7 has a clutch shoe 9a pressed against the inner peripheral surface of the cylindrical portion 18 and an expandable clutch shoe 9a fixed thereto. The clutch band 9b is expanded by a clutch mechanism including a hydraulic cylinder (not shown), and the clutch shoe 9a is brought into contact with the inner peripheral surface of the cylindrical portion 18 to contact the winch drum 2. Transmit power. The clutch mechanism of the inner expanding band clutch 9 is driven by operating a lever (not shown) to transmit power to the winch drum 2.
When the clutch band 9b is loosened, the rotation of the torque shaft 7 is interrupted or the clutch is in a half-clutch state. Further, the band brake 10 includes a lining 10b that is pressed against the outer peripheral surface of the cylindrical portion 19,
And a brake band 10a to which the lining 10b is fixed. The brake band 10a is tensioned by operating a pedal (not shown), whereby the winch drum 2 is braked.

Next, the planetary reduction mechanism 6 for reducing the rotation of the motor 3 will be described. A sun gear 21 is fixed to the distal end of the motor shaft 5, and an intermediate gear 22 is rotatably mounted inside the sun gear 21 (on the side of the motor 3). A carrier 23 is spline-coupled to the intermediate gear 22, and the sun gear 21 is attached to the carrier 23.
Is rotatably mounted on a support shaft 26. The planet gear 25 meshes with a ring gear 27 supported as described later.

A fixed gear 30 is rotatably mounted on the carrier shaft 14 by a support shaft 29. The fixed gear 30 meshes with the intermediate gear 22 and the ring gear 27, respectively. The rotation of the motor 22 is transmitted to the ring gear 27 as described later.

The above-described carrier shaft 14, sun gear 21, intermediate gear 22, carrier 23, planet gear 25, support shaft 26,
The ring gear 27, the fixed gear 30, and the support shaft 29 constitute a planetary reduction mechanism 6 that reduces the rotation of the motor shaft 5 and transmits the rotation to the torque shaft 7.

A holder 31 is fixed to one end (the left end in FIG. 1) of the ring gear 27 by bolts 32, 32. The holder 31 is attached to the outer periphery of the boss 11a of the fixed part 11 by a bearing 33. It is rotatably mounted on the surface. A flange 7a of the torque shaft 7 is fixed to the other end (the right end in FIG. 1) of the ring gear 27 by bolts 35, 35,. The outer end of the torque shaft 7 is rotatably supported by a boss 12 a formed on the fixed part 12 via a bearing 36.

The other end (the right end in FIG. 1) of the winch drum 2 is rotatably supported on the outer periphery of the torque shaft 7 by a bearing 37. Further, a lid 39 is fixed to the outer surface of the side plate 2c of the winch drum 2 by bolts 40, 40,..., Which presses the bearing 37 and the holder 16 on the opposite side to the lid 39. The winch drum 2 is positioned in the axial direction. A rope 4 is attached to the winding drum 2a of the winch drum 2.
1, the base 41b of the rope 41 is pulled out from the hole formed in the ratchet wheel 2b to the outer surface of the ratchet wheel 2b and is locked by a locking portion (not shown).

Next, the operation of the winch device configured as described above will be described.

When the motor 3 is started in a state where the inner expanding band clutch 9 is pressed against the inner peripheral surface of the cylindrical portion 18 and the band brake 10 is loosened, the rotation of the motor shaft 5 causes the sun gear 21 to rotate from the planet gears. The carrier is transmitted to the gear 25, and the planetary gear 25 rotates and revolves around the planetary gear 25 to rotate the carrier 23 around the motor shaft 5.

When the carrier 23 rotates, the carrier 23
And the intermediate gear 22 spline-coupled to rotate the fixed gear 30 to rotate. The fixed gear 30 reduces the speed of the ring gear 27 and the torque shaft 7 integrated therewith without rotating, and drives the ring gear 27 to rotate.

The rotation of the torque shaft 7 is transmitted to the cylindrical portion 18 integral with the winch drum 2 via the inwardly expanding band clutch 9, whereby the winch drum 2 rotates and winds the rope 41. Further, in this state, when the driving of the motor 3 is stopped and the band brake 10 is pressed against the cylindrical portion 19, the rotation of the winch drum 2 can be braked.

When the inner expanding band clutch 9 is loosened and the band brake 10 is also loosened, the winch drum 2 becomes free and the winch drum 2 is released.
Rotates freely due to the load acting on the rope 41. At this time, since the link between the winch drum 2 and the planetary reduction mechanism 6 is shut off, the winch drum 2 can rotate in a drum-free state without being affected by the planetary reduction mechanism 6.

Thus, when the winch device 1 is applied to a construction machine such as a crane and the suspended load is dropped by its own weight, only the winch drum 2 rotates and the planetary reduction mechanism 6 Since it is not affected by the rotation of 2, the noise due to the high-speed rotation of the planetary reduction mechanism 6, the occurrence of deterioration of the planetary reduction mechanism 6, and the like can be prevented.

In this embodiment, one end of the winch drum 2 and one end of the planetary reduction mechanism 6 (the left end in FIG. 1) are both connected to the boss 11 of one of the fixed parts 11.
a, and the other end of the winch drum 2 is rotatably supported on the torque shaft 7 of the planetary reduction mechanism 6 as described above, and the torque shaft 7 is connected to the other fixed portion 12. To be rotatably supported.

Thus, at least two conventionally used bearings for supporting the torque shaft 7 are not required in the winding drum 2a of the winch drum 2. That is, the inside of the winch drum 2 includes the planetary reduction mechanism 6.
And a compact winch device 1 can be realized with little space other than the required space, and the structure and shape of the winch device 1 can be simplified by reducing the bearings. Can be.

Further, the winch drum 2 is braked by the band brake 10 pressed against the cylindrical portion 19 of the winch drum 2 to shorten the rear end of the motor. A winch device can be realized.

FIG. 2 shows another embodiment of the present invention. The winch device 1 of the present embodiment differs from the winch device 1 of FIG. 1 is omitted, and the wet multi-plate brake 42 is disposed at the rear end of the motor 3. The other parts are the winch device 1 shown in FIG.
Since the configuration is the same as that described above, the description is omitted.

In FIG. 2, a wet multi-plate brake 42 (braking means) is provided at the rear end of the motor 3. The wet multi-plate brake 42 allows the rotation of the motor 3 when the motor 3 is started, and brakes the motor 3 when the motor 3 is stopped, in conjunction with the start or stop of the motor 3.

In the winch device 1 having the above-described structure, the clutch shoe 9b of the inwardly expanding band clutch 9 is connected to the cylindrical portion 1
When the motor 3 is started while being pressed against the inner peripheral surface of the motor 8,
The wet multi-plate brake 42 allows the rotation of the motor 3, and the rotation of the motor 3 decelerated by the planetary reduction mechanism 6 is transmitted to the cylindrical portion 18 via the inwardly expanding band clutch 9, and the winch drum 2 is driven. Is done. In this state, the motor 3
When the rotation of the winch drum 2 is stopped, the rotation of the winch drum 2 is also braked because the wet multi-plate brake 42 brakes the rotation of the motor shaft 5 in conjunction therewith.

Further, when the motor 3 is stopped and the wet-type multi-plate brake 42 brakes the rotation of the motor shaft 5 and the inner expansion type band clutch 9 is loosened, the winch drum 2 becomes free and the rope Due to the load acting on 41, the winch drum 2 freely rotates. At this time, since the link between the winch drum 2 and the planetary reduction mechanism 6 is shut off, there is nothing other than the winch drum 2 to rotate. Further, in this state, the clutch shoe 9a of the inner expanding band clutch 9 is
Is pressed against the inner peripheral surface of the cylindrical portion 18, the rotation of the winch drum 2 can be braked.

In the present embodiment, in addition to the effects of the above-described embodiment, since there is no cylindrical portion 19 for the brake in the winch device 1 of the above-described embodiment, a compact winch device having a small outer shape can be realized.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0033]

As described above, according to the first aspect of the present invention, the winch drum that rotates by reducing the rotation of the motor by the planetary reduction mechanism is configured to be rotatable independently of the planetary reduction mechanism. When the drum is free with the drive unit and the braking unit cut off, the planetary reduction mechanism does not rotate at high speed with the rotation of the winch drum.
The winch drum can obtain a sufficient free state without the rotational inertia and the rotational resistance of the planetary reduction mechanism, and can prevent the generation of noise and shortening of the life of the planetary reduction mechanism. Since at least two bearings at predetermined intervals are not required in the winch drum, the inside of the winch drum can be used only for the space of the planetary reduction mechanism, and a compact winch device is realized. And simplification of the structure and shape by reducing the number of bearings can be realized.

According to a second aspect of the present invention, there is provided an inwardly expanding band clutch provided integrally with an output shaft of a planetary reduction mechanism.
Since the rotation of the motor decelerated by the planetary reduction mechanism is transmitted to the winch drum, in addition to the effect of the invention of claim 1, when the winch drum is rotated via the rope, the winch drum is moved from the planetary reduction mechanism. The winch drum can be rotated independently by reliably shutting off.

According to a third aspect of the present invention, the rear end side of the motor is shortened by braking the winch drum by a band brake which presses against the cylindrical portion of the winch drum. In addition to the effect, a compact winch device in which the axial length of the winch drum is short can be realized.

According to the fourth aspect of the present invention, since the winch drum is braked by the wet multi-plate brake connected to the rear end of the motor, a winch drum having a small outer diameter can be realized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a winch device according to an embodiment of the present invention.

FIG. 2 is a driven front view of a winch device according to another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 winch device 2 winch drum 3 motor 5 motor shaft 6 planetary reduction mechanism 7 torque shaft (output shaft) 9 internal expansion type band clutch 10 band brake 11 one fixed portion 12 other fixed portion 14 carrier shaft 25 planetary gear 27 ring gear 30 Fixed gear

Claims (4)

[Claims] 1. A winch drum on which a rope is wound around a winding drum, a motor for rotating the winch drum, a planetary reduction mechanism for reducing the rotation of the motor, and a rotation of an output shaft of the planetary reduction mechanism. A clutch for transmitting the winch drum so that the winch drum can be turned on and off, and a braking means for braking the rotation of the winch drum; the planetary reduction mechanism is built in the winding drum; and the winch drum is moved from the planetary reduction mechanism to the winch drum. In an independently rotatable winch device, the planetary reduction mechanism includes a carrier shaft integrally supported by a pair of fixed portions rotatably supporting both sides of a winch drum, and a plurality of rotations of the motor. A ring gear that is transmitted through the planetary gears at a reduced speed, and the output shaft that rotates integrally with the ring gear. The motor is attached to one of the fixed portions. And the carrier shaft of the planetary reduction mechanism is integrally provided, and the other end of the ring gear and the other end of the winch drum are rotatably supported by the boss of the one fixed portion, respectively, and A winch device, wherein the output shaft is rotatably supported by the other of the fixed portions, and the other end of the winch drum is rotatably supported by the output shaft. 2. The winch drum has a cylindrical portion for an inflatable band clutch, and the inflatable band clutch is provided on the output shaft, and the inflatable band clutch is connected to the cylindrical portion. The winch device according to claim 1, wherein the rotation of the motor decelerated by the planetary speed reduction mechanism is transmitted to the winch drum by being pressed against an inner peripheral surface of the winch drum. 3. The winch drum has a cylinder portion for braking, and the braking means is a band brake wound around the outer peripheral surface of the cylinder portion, and the band brake controls rotation of the winch drum. 3. The winch device according to claim 1, wherein braking is performed. 4. A wet type wherein the rotation of the motor is allowed or braked in conjunction with the start and stop of the motor in a state where the inner expansion band clutch is pressed against the inner peripheral surface of the cylindrical portion of the winch drum. 3. The winch device according to claim 1, further comprising a multi-plate brake, wherein the wet multi-plate brake brakes the rotation of the winch drum.