JPS58162497A - Winch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winch in which a planetary speed reducer is built into the winding drum to reduce the rotational force from the prime mover and transmit it to the drum.

In recent years, with the advancement of technology, planetary speed reducers have come to be used in various devices, and winches for construction machinery such as cranes are no exception. Among these winches, winches have appeared in which the planetary reducer is built into the drum winding drum for reasons such as shortening the axial dimension of the drum.

By the way, many winches with built-in planetary reducers are not equipped with a clutch mechanism, but some winches are equipped with a clutch mechanism.

In this case, the clutch mechanism is a multi-disk clutch attached to the output shaft of a prime mover such as a hydraulic motor or an electric motor. However, this multi-disc clutch has a problem with so-called cow clutch operation, and the ON/OFF
Only 371 operations (enter or cut) are possible.

Therefore, the conventional winch with a built-in planetary reducer equipped with a clutch cannot be used as a winch for, for example, clam work or bucket work in which a half-clutch operation is performed. In addition, as mentioned above, the clutch is installed on the output shaft of the prime mover, that is, between the prime mover and the reducer, and the reducer and the drum are directly connected. When a suspended load is allowed to freely fall, the reducer also rotates at high speed along with the rotation of the drum, which increases the rotational resistance and makes it difficult to freely fall. There were drawbacks such as accelerating deterioration.

The present invention solves the above-mentioned drawbacks by configuring the drum to be rotatable independently of the planetary reducer and by providing an internal expansion type clutch that can be operated in a half-clutch state between the drum and the reducer. The purpose is to provide a winch that eliminates all problems.

In order to achieve such an object, the present invention discloses a method for reducing rotational force from a prime mover and transmitting it to a drum.
62497 (2) In a winch in which a gear reducer is built into a drum winding drum, one end of the drum equipped with a prime mover is supported by a fixed frame via at least a bearing, and the other end of the drum is supported by a fixed frame. One end is rotatably supported via a bearing on a drum shaft connected to the output part of the planetary reducer at at least two locations spaced a certain distance apart in the axial direction of the cylinder, and the other end of the drum shaft is The drum protrudes laterally from the flange surface on the other end of the drum and is supported by the fixed frame via at least a bearing, so that the drum is rotatably supported by the fixed frame in a state where it can rotate independently of the planetary reducer. At the same time, a cylindrical portion is formed coaxially with the drum shaft on the outer surface of the 7 flange on the side from which the drum shaft protrudes, and a cylindrical portion is formed inwardly of the cylindrical portion so that the inner peripheral surface of the cylindrical portion and the drum shaft can be freely moved toward and away from each other. This configuration is characterized in that an internally expanding clutch is provided so that the rotational force of the drum shaft is transmitted to the drum via the internally expanding clutch.

The present invention will be described in detail below with reference to the drawings.

The figure is a cross-sectional view showing an embodiment of the winch according to the present invention, and the winch includes a prime mover, here a hydraulic motor 1, a drum z, an a-ya reducer 3, and an internally expanding clutch 4.
The main structure is In this case, the hydraulic force 1 is attached to a bearing body 7 via bolts 8 at one end gA of the drum 2 (on the left side in the figure), which is fixed to one vertical frame portion 5a of the fixed frame 5 via bolts 6. The output shaft 1a is connected to the input shaft 3a of the planetary reduction gear 3 via a coupling 9.

Further, the drum 2 includes a substantially cylindrical winding drum 2 around which the rope 10 is wound, and flanges 2b at both ends thereof.

2c, one end of which is fitted onto the inner periphery of one end of the winding drum 2a and supported by the bearing body 7 via a bearing 11.) A vertical frame portion of the fixed frame 5. It is rotatably supported by 5a. The other end of the drum 2 is wound around a drum shaft B whose one end is connected to the M2-stage carrier 3b, which is the output part of the planetary reducer 3, at two locations spaced at a predetermined distance in the axial direction within the winding drum 2. The body 2a is rotatably supported via bearings 14 and 16 fitted to the inner periphery of the body 2a. In this case, the bearings 14 and 16 are mounted on the other end surface of the drum 2 in the inner axial direction of the winding drum 2a, for example, in the vicinity of the planetary reducer 3, as shown in the figure. Further, the other end of the drum shaft 13 is connected to the 7 rank 2C on the other end side of the drum 2.
The fixed frame 5 protrudes laterally from the surface and is attached to the fixed frame 5 via the bearing 12.
With the above configuration, the vertical frame portions 5m, 5 of the fixed frame 5 can be rotated independently from the iE planetary reducer 3.
It is rotatably supported between the parts b. The bearing 12 includes a bearing 128 and a retainer 12b, and is fixed to the acid frame portion 5b via bolts 15.

Furthermore, the idler 1 reducer 3 is not particularly different from that used in conventional devices, and the first stage sun gear 3c and the first stage sun gear 3c, which are interposed between the input shaft 3m and the second stage carrier (output part) 3b, 1st stage planetary gear 3d.

Bearing 3., shaft 3f, first stage carrier 3gs, second stage sun gear 3h, second stage planetary gear 31. bearing bjs
It mainly consists of a deceleration mechanism 3m consisting of a shaft 3 and a ring gear 3t, and a lid 3Plaq fixed to the ring gear 3t using bolts 3n and 3o so as to attach the deceleration mechanism 3m from both ends. make up a composition. In this case, the input side lid 3p is fixed to the receiver 7 by the spline part A, and the center part is connected to the bearing 3M.
The input shaft 3a passes through with the intervening. Further, the output side end of the second stage carrier 3b, to which one end of the drum shaft 13 is connected to the spline portion B, is supported via a bearing 3s at the center of the output side lid 3q. .

Further, the inner expansion type clutch 4 includes a drum shaft 1 of the drum 2.
The inner side K of the cylindrical part 2d is formed coaxially with the drum shaft 13 on the outer surface of the flange 2e on the side where the flange 3 protrudes.

The circumferential surface of the cylindrical portion 2d and the drum shaft 13 are provided so as to be movable toward and away from each other. That is, this clutch 4 is connected to the drum shaft 1
A clutch driver 4m is fixed to the inner portion of the cylindrical portion 2d of No. 3 by a spline portion C.

The clutch driver 4a includes a clutch band 4b provided on the outer periphery of the clutch driver 4a and a lining 4c attached to the outer periphery of the clutch band 4b. The outer diameter of the lining 4c and the cylindrical portion 2d of the flange 2c are increased or decreased by manipulating the
The inner circumferential surface comes into contact with and separates from the clutch, and even when they make contact, the contact pressure is controlled so that a half-clutch operation is possible. Here, the brake is provided on the outer peripheral side of the cylindrical portion 2d, and only the brake band 17 and the lining 18 are shown in the figure.

It goes without saying that the output shaft 1m of the hydraulic motor 1, the input/output section of the planetary reducer 30, and the drum shaft 13Fi are each located precisely above the drum 2.

Next, the operation of such a winch will be explained. First, when the hydraulic motor 1 rotates, its rotational force is transmitted to the input shaft 3a of the planetary reducer 3 via the coupling 9, and is decelerated through the reduction mechanism 3mt. transmitted to. The rotational force of the drum shaft 13 is transmitted to the internally expanding clutch 4 via the spline portion C, and when this clutch 4 is turned on, the lining 4c is moved to the inner surface of the cylindrical portion 2d of the 7-lunge 2c. 9 The rotational force is transmitted to the drum 2 by pressure contact with the page 9, and the
F'' operation causes the lining 4c to separate from the inner circumferential surface of the cylindrical portion 2d, and the transmission of rotational force to the drum 2 is released (therefore, in this state, the drum 2 rotates independently of the planetary reducer 3). Furthermore, when the clutch 4 is operated by 1/2", the lining 4c comes into contact with the inner surface of the cylindrical portion 2d with an appropriate pressure, and the next power is transmitted to the drum 2 according to the contact pressure. The load applied to the rope lO causes the lining 4c and the cylindrical part 2d to
A gap 9 is created in between, resulting in a half-clutch operation. During these operations, the radial load (load in the direction perpendicular to the axis of the drum 20) acting on the drum 2 is applied to the bearing 11 (and bearing body 7) that supports the lower ram 2 and the bearing 12m (bearing 12). is transmitted to the fixed frame 5 via.

As described above, the winch of the present invention uses an internal expansion type clutch as a clutch to connect and release the transmission of rotational force to the drum, so it is possible to operate a cow clutch. Winch 10 ti K can also be applied, expanding the range of uses. Also, make sure that at least one end of the drum is clean! The other end of the drum is supported by a fixed frame via a ring, and the other end of the drum has bearings attached to the drum shaft, one end of which is connected to the output part of a planetary reducer, at at least two locations spaced apart at a predetermined distance in the axial direction of the drum winding body. The other end of the drum shaft protrudes laterally from the flange surface on the other end of the drum, and is supported by the fixed frame through at least a bearing, thereby making the drum a planetary reducer. The clutch is rotatably supported by a fixed frame in a state where it can rotate independently from the drum shaft, and the clutch is configured to connect between the drum shaft and the inner circumferential surface of a cylindrical portion formed on the outer surface of the flange on the side from which the drum shaft projects. Since it is installed so that it can be moved toward and away from the drum, the planetary reducer is completely disconnected from the drum when the clutch is turned OFF. Therefore, when a suspended load is freely lowered using a crane, etc., the planetary reducer does not rotate, which accelerates the deterioration of the planetary reducer.
, no noise is generated, and the free fall is not obstructed. The 6 drums are supported by at least two bearings fitted to the inner circumference of the winding drum9, and the radial load (load applied in the direction perpendicular to the drum axis) due to rope tension is applied to the planetary reducer part. Since it does not work, there is no negative effect on the meshing of the gears.

[Brief explanation of the drawing]

The figure shows an embodiment of the winch according to the invention. DESCRIPTION OF SYMBOLS 1... Hydraulic motor, 1a... Output shaft, 2... Drum, 2a... Winding drum, 2b, 2c... 7 langes, 2d
...Cylindrical part, 3...Planetary reducer, 3m...Input shaft, 3b...2nd stage carrier (output part), 4...Inner expansion type clutch, 5...Fixed frame' Mu, 5m, 5-b・
・Vertical frame ilL? ...bearing body, 9...coupling, lO...rope, ll...bearing,
12...Bearing, 12m...Bearing, 13...
・Drum shaft, 14, 16 pairing, A-C...spline part. Tokken Applicant Hitachi Construction Machinery Co., Ltd. Representative Patent Attorney Masami Akimoto

Claims (1)

[Claims] A winch that has a planetary reducer built into the drum's winding barrel that reduces the rotational force from the prime mover and transmits it to the drum.
One end of the drum equipped with a prime mover is supported by a fixed frame via at least this bearing, and the other end of the drum is equipped with a planetary reducer at at least two locations spaced at a predetermined distance in the axial direction of the drum winding drum. The drum shafts are rotatably supported via bearings on respective drum shafts connected to the output parts of the drums, and the other end of the drum shafts protrudes laterally from the 7-rank surface on the other end of the drum, and is fixed via at least the bearings. By being supported by the frame, the drum is rotatably supported by the fixed frame in a state where it can rotate independently of the planetary reducer, and the drum shaft is attached to the outer surface of the flange on the side from which the drum shaft protrudes. forming a cylindrical part coaxially with
An internally expanding clutch is provided inside the cylindrical portion and can freely connect and disconnect between the inner circumferential surface of the cylindrical portion and the drum shaft, so that the rotational force of the drum shaft is transmitted to the drum via the internally expanding clutch. A winch featuring