JPH0723627Y2 - Electric winch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an electric winch used for lifting and lowering loads.

[Conventional technology]

For example, an electric winch in which a wire rope is wound around a drum using an electric motor, or a wire rope is unwound from the drum to lift an object, the electric motor, reduction gear, clutch, etc. are housed inside the drum in order to reduce the size. It is configured.

[Problems to be solved by the device]

However, the conventional reduction gears, clutches and the like have a large outer diameter, and accordingly, the diameter of the drum is increased accordingly, and there is a problem that the demand for downsizing cannot be met.

[Means for solving problems]

The present invention has been made to solve the above-mentioned various problems of the related art. By reducing the size of reduction gears, clutches, etc., the diameters of constituent members such as drums are made as small as possible. The purpose of this is to provide a drum that winds a wire between a pair of left and right frames that are erected separately from a base so as to be rotatable. , A rotary shaft of an electric motor fixed to the left frame is provided in the drum by penetrating the frame, and a gear loosely fitted to the rotary shaft is rotatably attached to the frame in an inner space of the drum. When the rotary shaft is connected to the internal gear provided on the drum via a plurality of supported intermediate gears, the rotary shaft is fixed to the gear toward its tip end and loosely fitted to the rotary shaft. Fixed disc and front A movable disc that is integrally connected to the rotary shaft by a pin connection and that is loosely fitted to the rotary shaft; a coil spring that is interposed to urge the movable disc toward the fixed disc; The stopper discs fixed to the tip of the shaft are sequentially mounted, respectively, and further, in any one of the facing faces of the fixed disc and the movable disc, the inclined face is provided in the forward rotation direction of the rotating shaft in the radial direction. An electric winch characterized in that an extending locking groove is provided on the other side, and a locking projection having an inclined surface portion that comes into contact with the inclined surface portion that can be engaged with and disengaged from the locking groove is provided.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. 1 is an exploded perspective view of the clutch, FIG. 2 is a perspective view of a fixed disk and a movable disk of the clutch, and FIG. 3 is a vertical sectional view of an electric winch according to the present invention to which the clutch is applied. FIGS. 4 (a) and (b) show operation explanatory views of the fixed disc and the movable disc.

In the figure, reference numeral 1 is an electric motor fixed to a frame 2 on the right side, and a sleeve 3 is inserted into a rotary shaft 1A protruding from the frame 2. Reference numeral 4 is a key inserted into the elongated hole 3a of the sleeve 3, and the sleeve 3 is fixed to the rotary shaft 1A by fitting the lower half of the key groove 1a of the rotary shaft 1A. The upper surface of the key 4 is flush with the outer peripheral surface of the sleeve 3.

Reference numeral 5 is a gear rotatably inserted in the sleeve 3, and through intermediate gears 6, 6 rotatably supported on the frame 2,
It is connected to an internal gear 8 integrally welded to the drum 7. Reference numeral 9 denotes a cylindrical shaft, which is integrally fixed to the side surface of the gear 5, and pins 10 are erected upright at the diametrically opposed positions thereof by insertion. Reference numeral 11 denotes a fixed disc that is inserted into the cylindrical shaft 9, and an insertion groove 13 into which the pin 10 fits is formed on the inner periphery of a center hole 12 of the fixed disc 11. Rotate integrally with the gear 5.

Denoted at 14 are locking grooves formed on the facing surface of the fixed disk 11 (on the side opposite to the surface facing the gear 5), and a plurality of locking grooves (two in the drawing) are formed in the radial direction. An inclined surface portion 14a and a vertical surface portion 14b that is orthogonal to the circumferential direction are provided in each. The rotation of the rotating shaft 1A of the electric motor 1 in the direction of the inclined surface portion 14a of the locking groove 14 is defined as the forward rotation.

Reference numeral 15 is a movable disk having the same diameter as the fixed disk 11, and its central hole
An insertion groove 18 for a pin 17 is formed on the inner circumference of the sleeve 16 at an opposite position in the diametrical direction of the sleeve 3 so that the pin 17 is upright by insertion. The movable disk 15 has the pin 17 interposed between the sleeve 3 and the electric motor. It rotates together with the rotating shaft 1A. Denoted at 19 is a locking projection formed on the facing surface of the movable disk 15 (on the side of the fixed disk 11), which is formed so as to be engageable with and disengageable from the locking groove 14 of the fixed disk 11. The stop projection 19 has an inclined surface portion 19a that abuts the inclined surface portion 14a and the vertical surface portion 14b of the locking groove 14, respectively.
And a vertical surface portion 19b are formed.

Reference numeral 20 denotes a stopper plate having the same diameter as that of the fixed disc 11, which is screwed into a male screw 3b engraved at the end of the sleeve 3 so as to be movable back and forth. The movable disc 15 is biased toward the fixed disc 11 by a compression type coil spring 21 interposed between and. Therefore, by rotating the stopper disc 20 with respect to the sleeve 3 to move it forward and backward, the pressing force of the movable disc 15 against the fixed disc 11 can be adjusted.

Further, on the side surface of the stopper disk 20, four through holes 20 are provided.
a is formed, and the screw 22 inserted into the through hole 20a is screwed and fixed to the female screw 15a formed on the side surface of the movable disc 15, so that the stopper disc 20 with respect to the sleeve 3 is formed.
Is fixed so that it does not rotate accidentally. Reference numeral 23 is a right frame, and a bearing ring 24 that rotatably supports the drum 7 is fixed to the inner surface side of the frame 23. The right frame 23 and the left frame 2 are bases.
It is separated and fixed by 25.

[Operation of Example]

Therefore, when the rotary shaft 1A of the electric motor 1 rotates in the positive direction, the sleeve 3 integrated with the rotary shaft 1A and the movable disk 15 connected to the sleeve 3 by the pin 17 rotate in the same direction. Then, when the movable disk 15 rotates, the inclined surface portion 19a of the locking projection 19 pushes and fixes the inclined surface portion 14a of the locking groove 14 of the fixed disk 11 as shown in FIG. The disk 11 is rotated, and the drum 7 is rotated in the forward direction from the gear 5 integrated with the fixed disk 11 via the intermediate gear 6 and the internal gear 8, and the wire W is wound on the drum 7. And the wire W
If a load is applied to the wire W during the winding of the wire W, this load is transmitted from the internal gear 8 of the drum 7 to the fixed disk 11 via the intermediate gear 6 and the gear 5 to serve as a brake, but the rotation of the electric motor 1 The shaft 1A continues to rotate at a predetermined rotation speed.

Therefore, the above-mentioned load is applied to the coil spring 21 with respect to the movable disk 15.
When the pressing force is exceeded, the inclined surface portion 19a of the locking projection 19 of the movable disk 15 slides on the inclined surface portion 14a of the locking groove 14 of the fixed disk 11 against the elastic force of the coil spring 21. As a result, the locking projection 19 of the movable disk 15 is disengaged from the locking groove 14 of the fixed disk 11, as indicated by the alternate long and short dash line in FIG. Therefore, since the rotational force of the electric motor 1 is cut off to the fixed plate 11, that is, the gear 5, to eliminate the above-mentioned load, the electric motor 1 is not subjected to unnecessary load.

When the load is released, the locking projection 19 of the movable disk 15 fits into the locking groove 14 of the fixed disk 11 again, so that the drum 7 starts rotating. As described above, the drum 7
When a load is applied to the motor 1, a sensor (not shown) or the like detects a load equal to or more than a predetermined value to rotate the electric motor 1 in the reverse direction.
As shown in (b) of the figure, the fixed disk is inserted through the movable disk 15.
The load may be eliminated by rotating 11 in the opposite direction.

[Effect of device]

In the electric winch according to the present invention, as described above, the drum on which the wire is wound is rotatably disposed between the pair of left and right frames which are erected on the base so as to be rotatable. A plurality of rotation shafts of an electric motor fixed to a frame are arranged in the drum by penetrating the frame, and a plurality of gears loosely fitted to the rotation shaft are rotatably supported by the frame in the inner space of the drum. When it is connected to the internal gear provided on the drum through the intermediate gear, the fixed disc fixed to the gear and loosely fitted to the rotary shaft is directed toward the tip of the rotary shaft. A movable disc that is integrally connected to the rotary shaft by pin connection and is loosely fitted to the rotary shaft; and a coil spring that is interposed to bias the movable disc toward the fixed disc. , Fixed to the tip of the rotary shaft The stopper disc each sequentially mounted,
Further, one of the facing surfaces of the fixed disk and the movable disk has a locking groove extending in the radial direction and having an inclined surface portion in the forward rotation direction of the rotating shaft, and the other of the locking grooves is detachable from the locking groove. Since the locking projections each having the inclined surface portion that contacts the inclined surface portion are provided, the reduction gear, the clutch, and the like can be downsized. Therefore, the diameter of each component such as the drum can be made as small as possible,
The winch can be made compact, and each part can be assembled by inserting or inserting all parts, so it is easy and quick to assemble or replace parts without requiring skill. There is.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a clutch, FIG. 2 is a perspective view of a fixed disk and a movable disk of the clutch, and FIG. 3 is a longitudinal sectional view of an electric winch according to the present invention to which the clutch is applied. FIGS. 9A and 9B are operation explanatory views of the fixed disk and the movable disk. 1 ... motor, 1A ... rotary shaft, 2,23 ... frame, 3 ...
… Sleeve, 5 …… Gear, 6,8 …… Reduction gear, 7 …… Drum, 11 …… Fixed disk, 12,16 …… Center hole, 13,18 …… Insertion groove, 14 …… Locking groove , 14a, 19a …… Sloping surface, 14b, 19b…
… Vertical surface, 15 …… Movable disc, 17 …… Pin, 19 …… Locking protrusion, 20 …… Stopper disc, 21 …… Coil spring, W ……
wire.

Claims (1)

[Scope of utility model registration request] 1. A drum (7) around which a wire (W) is wound is rotatably disposed between a pair of left and right frames (2) (23) standing upright on a base (25). The electric motor (1) fixed to the left frame (2)
The rotating shaft (1A) of the gear (1A) which penetrates the frame (2) and is disposed inside the drum (7), and which is loosely fitted to the rotating shaft (1A) in the internal space of the drum (7) ( When 5) is connected to the internal gear (8) provided on the drum (7) via a plurality of intermediate gears (6) rotatably supported on the frame (2), the rotary shaft ( 1A) has a fixed disc (11) fixed to the gear (5) and loosely fitted to the rotary shaft (1A) toward the tip thereof, the rotary shaft (1A) and the pin (17). A movable disc (15) which is integrally connected by coupling and is loosely fitted to the rotary shaft (1A), and an intervening member for urging the movable disc (15) toward the fixed disc (11). When mounted, a coil spring (21) and a stopper disc (20) fixed to the tip of the rotary shaft (1A) are sequentially mounted,
Further, a locking groove extending in the radial direction is provided with an inclined surface portion (14a) in the forward rotation direction of the rotating shaft (1A) on one of the facing surfaces of the fixed disk (11) and the movable disk (15). (14)
On the other hand, the slanted surface part (14
Locking protrusion (19) with inclined surface (19a) that abuts against a)
An electric winch that is equipped with each.