JP3134872B1 - Winding device - Google Patents

Abstract

An object of the present invention is to reduce the size of a drum member that winds an object to be wound without impairing winding ability in a winding device such as a winch. SOLUTION: This winch has a reduction mechanism 1 inside a drum 11 for reducing the output of an electric motor 13 which is a drive source.
Four. The reduction mechanism 14 has a three-stage planetary gear mechanism, and the three third planetary gears 39 of the last-stage planetary gear mechanism of the reduction mechanism 14 and the drum disk portion 11 c that forms a part of the drum 11 are connected to each other. Directly connected. As a result, the drum disk portion 11c is directly driven to rotate with the rotation of the three third planetary gears 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device used for winding heavy objects or the like.

[0002]

2. Description of the Related Art Conventionally, winches have been used to lift ships, lift elevators, or lift heavy objects in civil engineering and construction work. The winch is
A rotatable winding drum is provided on a support base or the like, and a rope or the like is wound by driving the winding drum to rotate.

[0003]

By the way, among the above-mentioned winches, those in which a drive source, a speed reduction mechanism, and the like are arranged inside a winding drum have been developed, thereby reducing the size of the entire apparatus. There is something. However, in such a winch, a drive source and a speed reduction mechanism are arranged inside the winding drum, and no particular consideration is given to miniaturization of the winding drum itself. If the winding drum having a built-in speed reduction mechanism and the like can be reduced in size in this way, the entire device can be further reduced in size.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a winding device that can easily reduce the size of a drum member that winds an object to be wound without impairing the winding ability. Aim.

[0005]

According to a first aspect of the present invention, there is provided a winding device for rotating a rotary drive source and rotating the rotary object by the rotary drive source. A take-up member, comprising a cylindrical drum member having a hollow portion, wherein the winding device is disposed in the hollow portion of the drum member, and reduces a rotational force generated by the rotary drive source. A gear device having a multi-stage reduction gear mechanism, comprising: a gear device having a sun gear as a final reduction gear mechanism, and three or more planetary gears meshed around the sun gear, wherein the drum member includes: The hollow
It has a drum disk that closes one end of the
The ram disk portion is directly connected to each of the three or more planetary gears, and is characterized by being driven to rotate by the rotational movement of these planetary gears.

According to a second aspect of the present invention, in the first aspect of the present invention, the rotary drive source is an electric motor capable of variable speed control.

According to a third aspect of the present invention, in the winding device according to the second aspect, the winding device further includes a detecting unit configured to detect a rotation state of the rotary drive source. The control is characterized in that feedback control is performed according to the detection result of the detection means.

According to a fourth aspect of the present invention, in the winding device according to any one of the first to third aspects, a position in contact with the rotary drive source or a member that rotates with the rotary drive source is provided; A brake device that has a friction member movably provided between a non-contact position and a braking device that applies a braking force to the rotation drive source or a member that rotates with the rotation drive source by a friction force when the friction member is in contact; And wherein the braking device is provided outside the drum member.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. A. First Embodiment FIG. 1 is a side sectional view showing a winch according to an embodiment of the present invention. As shown in the figure, this winch
Stand 10 fixed on winch support surface such as the ground
And a cylindrical drum 11 rotatably supported by a bearing 16 supported by the stand 10.

A flange portion 1 is provided at each end of the outer peripheral surface of the drum 11 in the direction of the rotation axis (left-right direction in the drawing).
1a is provided, and a winding target such as a rope is wound between these flange portions 11a. Then, by rotating the drum 11, it is possible to perform a winding operation and a feeding operation of a winding target such as a rope.

The stand 10 is fixed to two places on the winch support surface. On one side (the right side in the figure), a shaft 11d protruding from the right end face of the drum 11 in the figure is rotatably supported. A bearing 16 is provided. On the other side (left side in the figure) of the stand 10, a substantially cylindrical support housing in which an electromagnetic brake (braking device) 12, an electric motor (rotary drive source) 13, and a reduction mechanism 14, which will be described later, are arranged. A body part 17 is provided. The supporting housing 17 is fixedly supported on the stand 10 on the left end side, and the right side of the drawing is inserted into the hollow portion of the drum 11 through a circular hole provided on the left end surface of the drum 11. Has become. The support housing 17 inserted into the drum 11 in this manner rotatably supports the drum 11 from the inside, and the bearing 16 rotatably supports the drum 11 from the outside, so that the drum 11 is rotatable. It is supported by.

An electromagnetic brake 1 is provided inside the support housing 17.
2. The electric motor 13 and the speed reduction mechanism 14 are arranged. The electric motor 13 is an induction motor including a stator 13a disposed on the inner periphery of the support housing 17 and a rotor 13b disposed on the inner periphery of the stator 13a with a predetermined gap therebetween. is there.

The electromagnetic brake 12 is disposed on the shaft 13c provided on the rotor 13b, on the opposite side of the drum 11 (left side in the figure). The electromagnetic brake 12 includes a fixed-side friction member 12a movably provided in the left-right direction in the drawing,
Fixed-side friction member 1 fixedly arranged to face this
2e, and these friction members 12a, 12e
Is brought into contact with the rotating-side friction member 13d spline-coupled to the shaft 13c, whereby friction is generated between the two and a braking force is applied to the shaft 13c. Specifically, the friction member 12a is urged by the coil spring 12c from the main body 12b toward the rotation-side friction member 13d (left side in the figure). On the other hand, the exciting coil 12d is provided in the main body 12b, and while the exciting current is being supplied to the exciting coil 12d, the fixed-side friction member 12a is turned by the magnetic field generated by the exciting coil 12d into the coil spring 12c.
The fixed friction members 12a and 12e are prevented from coming into contact with the rotating friction member 13d by being attracted to the main body portion 12b side (right side in the drawing) against the urging force of. In other words, when the exciting coil 12d is not excited, the biasing force of the coil spring 12c causes the fixed-side friction members 12a,
12e and the rotating side friction member 13d are brought into contact with each other. That is, the electromagnetic brake 12 is a non-excitation operating brake that applies the braking force by bringing the fixed-side friction members 12a and 12e into contact with the rotating-side friction member 13d in the non-excitation state, and releases the braking force in the excitation state. . Therefore, when the power of this winch is off, the brake operates,
It is possible to prevent the shaft 13c from rotating when the power is turned off.

In the winch according to the present embodiment, the above-described electromagnetic brake 12 is disposed outside the drum 11 inside the support housing 17 and the brake housing 17a covering the electromagnetic brake 12 is attached to the support housing 17 Are individually detachably provided. Therefore, the electromagnetic brake 12
When performing maintenance or the like on the brake housing 1
It is only necessary to remove the drum 7a, and there is no need to remove the drum 11 from the support mechanism such as the bearing 16 and the support housing 17. Therefore, if the stand 10 and the drum 11 are set to a state where free rotation is restricted by an engaging member such as a pin,
Maintenance of the electromagnetic brake 12 can be performed in a state where a load is applied to a winding target such as a rope on the drum 11 (for example, a state in which a heavy object is hung on the tip of the rope).

Next, a motor state detector 19 is provided at the left end of the shaft 13c via a microcoupling 18. The motor state detector 19 detects the state such as the position and speed of the electric motor 13, and various known ones such as an optical position sensor and a position detection sensor using a resolver can be used. Then, the detection result is transmitted to a control device described later, and the control device performs feedback control of the rotation speed of the electric motor 13 using the detection result.

Next, a control configuration of the electric motor 13 will be described with reference to FIG. As shown in the drawing, the control configuration of the electric motor 13 includes a power supply 20, a power inversion device 21, a control device 22, and the motor state detector 1 described above.
9 is provided. The power inverter 21 converts the power supplied from the power supply 20 into AC power having a required voltage and frequency according to a control command from the control device 22, and outputs the AC power to the electric motor 13.

The control device 22 sends a control command corresponding to a drive command (command such as a stop position or a rotational speed) input from a user of the winch or the like to the power inversion device 21. This makes it possible to control the rotation speed and the stop position according to the drive command from the user or the like. At this time, the control device 22 performs the feedback control based on the speed or position information of the electric motor 13 supplied from the motor state detector 19, so that more accurate control of the electric motor 13 can be performed. It has become.

As a method of controlling the power inverting device 21 by the control device 22, various known methods can be used. For example, methods such as vector control and slip frequency control can be used. In the present embodiment, the variable speed control of the electric motor 13 is performed by the above-described control configuration. However, the variable speed control of the electric motor is performed by controlling the number of poles using a pole number conversion motor. You may do so.

Returning to FIG. 1, the shaft 1 of the electric motor 13
The right end of FIG. 3c is connected to the speed reduction mechanism 14, whereby the rotation of the shaft 13c is reduced and output. Hereinafter, the configuration of the speed reduction mechanism 14 will be described with reference to FIGS. 1 and 3.

As shown in FIGS. 1 and 3, the speed reducing mechanism 14 includes a first sun gear 3 connected to a shaft 13c.
0 and 3 respectively meshed around the first sun gear 30
And two first planetary gears 31. Further, each first planetary gear 31 is meshed with an internal gear 33 formed on the inner peripheral surface of the support housing 17. That is, the first sun gear 3
0, the first planetary gear 31 and the internal gear 33 constitute a planetary gear mechanism, and when the first sun gear 30 is rotated in the direction of the arrow in the drawing, the first planetary gears 31 It is configured to be rotationally moved between 33 and the first sun gear 30 in a direction indicated by an arrow. The first carrier 32 is connected via a transmission shaft to the shaft of each first planetary gear 31 rotated and moved in this manner. The first carrier 32 is rotatable concentrically with the first sun gear 30. When the first planetary gear 31 is rotationally moved as described above, the first carrier 32 is rotated by the first sun gear 3.
It can be rotated concentrically with 0.

As shown in FIG. 1, a second sun gear 35 is connected to the center axis of the first carrier 32 which is rotated as described above, whereby the second sun gear 35 is moved as described above. It is rotated with the first carrier 32 that is rotated. Around the second sun gear 35, three second planetary gears 36 mesh with each other, and these second planetary gears 36 mesh with the above-described internal gear 33. Each second planetary gear 36 has a second carrier 37 that is rotatable concentrically with the first sun gear 30 and the second sun gear 35.
Are connected.

As shown in FIGS. 1 and 4, the second
A third sun gear 38 is connected to the center axis of the carrier 37, and the third sun gear 38 is rotated with the rotation of the second carrier 37. Around the third sun gear 38, three third planetary gears 39 mesh with each other. These third planetary gears 39 and the internal gear 40 formed on the inner peripheral surface of the support housing 17 are in mesh with each other. Have been combined.

That is, the speed reduction mechanism 14 includes a first stage planetary gear mechanism including a first sun gear 30, a first planetary gear 31, a first carrier 32, and an internal gear 33, a second sun gear 35, A second-stage planetary gear mechanism including a second planetary gear 36, a second carrier 37, and an internal gear 33; and a final-stage planetary gear mechanism including a third sun gear 38, a third planetary gear 39, and an internal gear 40. It is a combination of a stage planetary gear mechanism. The rotation of the shaft 13c is reduced by such a three-stage planetary gear mechanism, and the third planetary gear 39 at the final stage is rotated.

In an ordinary general planetary gear mechanism, the same carrier as the first carrier 32 or the second carrier 37 is connected to the shaft of each of the last stage planetary gears. This is the output shaft of the speed reduction mechanism. However, in the speed reduction mechanism 14 according to the present embodiment, the shaft portion of each of the third planetary gears 39 in the final stage is configured such that the transmission shaft 41 forms the right end surface of the drum 11 in FIG.
1c. That is, in the present embodiment, each third planetary gear 39 at the last stage is directly connected to the drum disk portion 11c that forms a part of the drum 11 without using a carrier or the like, and the drum 3 is rotated by the third planetary gear 39. Disk part 1
1c is directly driven to rotate. At this time, since the reduction mechanism 14 is a combination of a planetary gear mechanism in a plurality of stages, the drum disc 11 c
The shaft 13c rotates concentrically when viewed from the axial direction (the left-right direction in FIG. 1). Thereby, the drum 11
Is rotated, and a winding target such as a rope can be wound or sent out. A shaft portion 11d that protrudes in the axial direction from the center of the drum disk portion 11c.
Are rotatably supported by the bearing portion 16. In rotating the drum 11 in this manner, in the present embodiment, oil seals 45a and 45b and large-diameter and thin bearings 46a and 46b are provided on both ends of the support housing 17 as a fixing member in the drawing, and the drum disk is provided. The rotation of the portion 11c is supported.

The effect of directly connecting the third planetary gears 39 of the last stage and the drum disk portion 11c will be described with reference to FIGS. Here, FIG.
Shows a configuration in which each of the final stage planetary gears 39 is connected to a carrier 50 by using a conventional general planetary gear mechanism, and a drum disk portion 11c is connected to an output shaft 51 provided at the center of the carrier 50.

Comparing these figures, it can be seen that the configuration according to the present embodiment (see FIG. 1) is smaller than the conventional configuration (see FIG. 5). This is because, in the configuration according to the present embodiment, since each third planetary gear 39 at the last stage is directly connected to the drum disk portion 11c, each third planetary gear 39 at the last stage shown in FIG. This is because the carrier 50 to be connected, its output shaft 51, the bearing 52 supporting the output shaft 51, and the like are not required. That is, in the present embodiment, components such as the carrier 50 and the output shaft 51 are not required, and a part of the drum 11 is formed, and the drum disk portion 11c, which is a member that forms an enclosed space, is used as a drive shaft. They are also used. As described above, the winch according to the present embodiment can reduce the size of the tram 11 and reduce the number of parts.

B. Operation of Embodiment Next, the operation of the winch having the above configuration will be described. In the winch according to the present embodiment, since the electric motor 13 capable of variable speed control is employed as the rotation drive source as described above, the following operation is possible.

First, when the winch is used for a winding device of a crane device, when the crane device performs an operation of lifting a heavy object, the electric motor 13 is driven at a low speed to slowly lift the heavy object. When lifting a heavy object, there is a problem in safety if the object is pulled up at a high speed.

Next, a case will be described in which the luggage holding section and the like provided at the tip of the rope of the crane device is lowered, that is, the rope and the like to be wound by the winch are sent out. In the conventional winding device, when performing the above-described lowering operation, it is possible to lower at a high speed because no luggage or the like is held. If it can be lowered at such a high speed, the working time can be reduced. For this reason, in the conventional winch, the drum is freely rotated and the luggage holding unit is freely dropped. In order to perform such a free fall, in a conventional winch, when a drive mechanism and a drum are connected by an electromagnetic clutch and a free fall operation is performed,
The coupling state between the drive mechanism and the drum was released by the electromagnetic clutch. On the other hand, in the winch according to the present embodiment, the electric motor 13 capable of performing the variable speed control as described above is used.
Is adopted, the electric motor 13
Is controlled so as to rotate at a high speed, thereby enabling a descending operation at a high speed without providing an electromagnetic clutch.
In addition, even when such a high-speed descending operation is performed, since the descending operation is controlled by the electric motor 13, the control of the stop position should be performed more accurately than in the case of performing the free fall. Can be.

As described above, according to the winch according to the present embodiment, the electric motor 13 capable of variable speed control as described above
By adopting the method described above, the safety of lifting a heavy object is maintained, and in the case of performing a feeding operation of a winding target such as a rope, a high-speed feeding operation can be performed without providing an electromagnetic clutch or the like. In addition, it is possible to more accurately control the feed amount of the winding target when performing such a high-speed feeding operation. Also, when winding is performed in a short time in a low load state, the electric motor 13
By rotating at a high speed, a winding operation at a high speed becomes possible.

C. Modifications The present invention is not limited to the above-described embodiment, and various modifications as described below are possible.

(1) In the above-described embodiment, the non-excited operation type electromagnetic brake 12 is used. However, the present invention is not limited to this, and a brake having a structure in which mechanical braking force due to friction is applied to the shaft 13c. It is sufficient if the friction member 12a is operated by a mechanical mechanism.

(2) In the above-described embodiment, the case where the electric motor 13 (induction type) capable of variable speed control is employed as the rotary drive source of the winch has been described. Other types of electric motors that can perform shift control may be used. If variable speed control is unnecessary, an electric motor operating at a constant speed or a hydraulic drive source may be used. It is preferable to use an electric motor as a drive source in order to easily reduce the size of the winch.

(3) In the above-described embodiment, the reduction mechanism 14 having the three-stage planetary gear mechanism is used. However, the present invention is not limited to this. Each planetary gear and drum disk part 11 of the last stage
As long as c is directly connected, the number of stages is arbitrary, and a reduction mechanism having a configuration in which another reduction mechanism and a planetary gear mechanism are combined may be used.

[0035]

As described above, according to the present invention,
It is easy to reduce the size of the drum member that winds the object to be wound without impairing the winding ability.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a winch according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a control configuration of an electric motor which is a component of the winch.

FIG. 3 is a view taken along line III-III of FIG. 1;

FIG. 4 is a view taken along the line IV-IV in FIG. 1;

FIG. 5 is a side sectional view showing a conventional winch.

[Explanation of symbols]

10 Stand, 11 Drum, 11a Flange, 11c Drum disk, 12 Electromagnetic brake (braking device), 13 Electric motor (rotary drive source), 1
4 ... reduction mechanism, 30 ... first sun gear, 31 ... first
Planetary gear, 32 first carrier, 33 internal gear, 3
5 ... second sun gear, 36 ... second planetary gear, 37 ...
Second carrier, 38 Third sun gear, 39 Third planetary gear, 40 Internal gear, 41 Transmission shaft

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-213594 (JP, A) JP-A-11-322279 (JP, A) JP-A-5-330793 (JP, A) 164294 (JP, U) JP 546883 (JP, U) JP 7-29751 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B66D 1 / 22,1 / 46

Claims (4)

(57) [Claims] 1. A winding device comprising: a rotary drive source; and a member for winding a target to be wound by being rotated by the rotary drive source, the cylindrical drum member having a hollow portion. A gear device which is disposed in the hollow portion of the drum member and has one or more stages of reduction gear mechanisms for reducing a rotational force generated by the rotary drive source, wherein a sun gear as a final stage reduction gear mechanism, and A gear unit having three or more planetary gears meshed around the drum unit, wherein the drum member closes one end of the hollow portion
A winding device having a disk portion, wherein the drum disk portion is directly connected to each of the three or more planetary gears, and is rotationally driven by the rotational movement of these planetary gears. 2. The winding device according to claim 1, wherein the rotary drive source is an electric motor capable of performing variable speed control. 3. The electric motor according to claim 2, further comprising a detection unit configured to detect a rotation state of the rotary drive source, wherein the variable speed control of the electric motor performs a feedback control according to a detection result of the detection unit. The winding device according to claim 2. 4. A friction member provided movably between a position in contact with the rotary drive source or a member that rotates with the rotation drive source and a position not in contact with the rotation drive source. The apparatus according to claim 1, further comprising a braking device that applies a braking force to the rotary drive source or a member that rotates with the rotation driving source, wherein the braking device is disposed outside the drum member. 3. The winding device according to any one of 3.