JPH05330793A - Electric winch - Google Patents

Abstract

PURPOSE:To draw a rope out manually by providing a pin device for connecting a hollow shaft fixed to a motor in a drum and frames on the both ends of the drum so that they can be freely connected or disconnected with and from one another, and by making the drum freely rotated relative to the frame by drawing out a pin. CONSTITUTION:A motor 2 is stored in a drum 1 provided with bearing rings 1a, 1b in each center of flanges on both sides, and a hollow shaft 3 fixed to one side of the motor 2 and a rotational supporting shaft 4 connected to the starting shaft end on the other side, are supported by the bearing rings 1a, 1b, while the motor rotation is transmitted to the rotational supporting shaft 4 through a speed reducer 6, drum 1 is supported on both pieces of a U-shaped frame 5 that are opposed to one another, and whirl-stop of a motor housing is achieved by fitting a pin 8 into a corresponding hole formed on the frame 5 by penetrating a whirl-stop plate 7 screw-fitted in the outer end of the hollow shaft 3. The drum 1 can be rotated relative to the frame 5 by drawing out the pin 8, and a rope W is thus drawn out manually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric winch in which a rope can be unwound from a drum by hand.

[0002]

2. Description of the Related Art Electric winches having a starter motor housed in a drum are known. As shown in FIG. 6, a U-shaped frame F fixed to the structure at the center side, a drum D having both ends supported by opposite sides of the frame, and an extension shaft E of the starting shaft housed and fixed in the drum supported at the drum end. A motor M and a speed reducer R mounted on the extension shaft and capable of rotating the drum at a low speed.

In this winch, the rope can be wound and unwound by switching the motor rotation between forward and reverse. The winch is used, for example, by fixing it to the lower part of the electric pole, engaging the unwound rope with a suspension vehicle on the upper part of the electric pole, and locking it with the load below. The winding is performed at a slow speed, but before the unwinding, it is desirable that the rope can be rapidly pulled out by hand. Put a clutch between the motor and the reducer,
It is necessary to keep the relationship between the two disconnected.
However, it is structurally difficult to provide an externally operable clutch in the drum. For this reason, the rewinding is performed at the same slow speed as the rewinding, and there has been a problem that time is wasted without meaning.

[0004]

SOLUTION: A hollow shaft is fixed to one side of a motor housing with a collar portion. Equipped with a reduction gear on the other side of the motor,
The output side is engaged with the drum. The motor rotatably supports the hollow shaft or the drum. Both ends of the drum are supported by a frame, and the frame and the hollow shaft are connected by pins.

[0005]

When the drum is driven to rotate, the motor housing is pinned to the frame with a pin. When the motor is rotated, the drum slowly rotates and winds. When the pin is pulled out, the drum can rotate with respect to the frame integrally with the motor and the speed reducer, so that the rope can be guided.
At this time, the drive wire is removed by the connector 12. Of course, even if you do not pull out the pin, you can feed the rope at a slow speed by rotating the motor in the reverse direction.

[0006]

EXAMPLE Referring to FIG. The drum 1 is provided with bearing rings 1a and 1b at the centers of both side flanges. A hollow shaft 3 is fixed to one side of the motor 2 by a collar portion 3a, and a rotation support shaft 4 is connected to the starting shaft end on the other side. The motor 2 has a hollow shaft 3 and a rotary support shaft 4 at the ends thereof, and a bearing ring 1 of the drum, respectively.
It is rotatably supported by a and 1b. A motor drive wire is inserted into the hollow shaft via a connector 12. Since a motor incorporating an electromagnetic brake device is commercially available, this is used as the motor 2. The frame 5 has a U-shape, is fixed to the structure at the central side, and supports both side bearing rings 1a and 1b of the drum at both opposite sides. As the speed reducer 6, a commercially available harmonic drive device is used. It is composed of an inner ring and an outer ring which are engaged with each other by a large number of teeth. The inner ring is slightly elastic and the number of teeth is slightly smaller than that of the outer ring.
The inner ring is fixed to the rotary support shaft 4 with the output side 6b, and the outer ring is fixed to the inner surface of the drum. The rotation stop plate 7 is screwed and fixed to the outer end of the hollow shaft 3 at its center hole, and a pin 8 is attached. The pin 8 is inserted into a hole penetrating the rotation stop plate and corresponding to a corresponding portion of the frame.

By inserting the pin 8, the motor housing is prevented from rotating on the frame, and the drum is slowly rotated. Pin 8
If you remove it, the drum can rotate with respect to the frame and you can pull out the rope W by hand.

FIG. 2 shows a pin device which can be easily attached and detached instead of the pin 8. The pin 9 is a cylindrical body 9a as shown in FIG.
The handle 9b is provided with a protrusion 9c on the handle and a grip 9d on the end. The frame 5 has a bottomed hole 5 as shown in FIG.
A is punched, and the spring 10 and the spring retainer 11 are inserted therein. In addition, a guide groove 5b whose open end is closed is cut in the inner wall of the bottomed hole 5a so that the outer edge claw of the spring retainer 11 is inserted so as not to protrude from the bottomed hole 5a. The whirl-stop plate 7 is provided with a cylindrical convex portion 7a at a position corresponding to the bottomed hole 5a, and the convex portion forms a lid-attached hole 7b. As shown in FIG. 4, the lid is provided with a notch 7c through which the projection 9c of the pin 9 can penetrate, and a groove 7d in which the projection 9c fits with its inner surface shifted by 90 degrees. Bottomed hole 5
The diameter of a and the hole 7b with the lid are the same, the main body 9a of the pin is movable back and forth between the two, and the handle 9b penetrates the lid.

In FIG. 2, the protrusion 9c engages with the inner surface groove 7d of the lid, and the main body 9a is positioned over the bottomed hole 5a and the lid-attached hole 7b by pressing the spring 10 via the spring retainer 11. When the grip 9d is pressed and rotated 90 degrees, the projection 9c passes through the notch 7c in the lid, the pin comes out, and the main body 9a stops contacting with the inner surface of the lid. At this time, the surface of the spring retainer 11 is on the same line as the end face of the frame 5, and the pin 9 is attached to the frame 5
To disengage from. That is, the drum can rotate with respect to the frame.

[0010]

[Effect] By attaching and detaching the pin 8 (or 9), the frame and the drum can be switched to be integrated or detached, and the rope can be freely pulled out by pulling the pin out.

[0011]

[Brief description of drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a front view of another embodiment.

FIG. 3 is a perspective view of a pin used in FIG.

FIG. 4 is a perspective view of a cylindrical convex portion used in FIG.

5 is a view on arrow A in FIG. 2. FIG.

FIG. 6 is a front view of a conventional electric winch.

[0012]

[Explanation of symbols]

 1 Drum 2 Motor 3 Hollow shaft 4 Rotation support shaft 5 Frame 6 Speed reducer 7 Rotation stop plate 8, 9 pin 10 Spring 11 Spring retainer 12 Connector W rope

Claims (2)

[Claims] 1. A drum having bearing rings at the centers of both side flanges, and a drum which is freely accommodated in the drum and has a hollow shaft fixed to one side and a starting shaft on the other side, which is rotatably supported by a bearing ring of the drum. A motor, a frame that supports bearing rings at both ends of the drum via hollow shafts and can be fixed to a structure; An electric winch composed of a pin device capable of connecting a hollow shaft and a frame. 2. The pin is composed of a main body and a handle, and the main body can be inserted into a bottomed hole of a frame into which a spring is inserted and a hole with a lid of a rotation stop plate, and the handle penetrates the lid of the hole with a lid and is an attached projection. The electric winch according to claim 1, wherein a pin device is a member that can be engaged with the lid by the pin device.