US1925474A - Winch, especially for use in granaries - Google Patents

Description

Sept. 5, 1933. P. WILSING 1,925,474

WINCH, ESPECIALLY FOR USE IN GRANARIES Filed March 18, 1930 3,Sheets-Sheet l f E ZECI E 23 E 24- F Fig.4. Fig.5.

Inventor PWz'au'ny:

Sept. 5, 1933.

Fig.2.

P. WILSING WINCH, ESPECIALLY FOR USE IN GRANARIES Filed March 18, 1930 3 Sheets-Sheet 2 Inventor P WL'd/zy by la. 2 20..

Jttorney Sept; 5, 1933.

P. WILSING WINCH, ESPECIALLY FOR USE IN GRANARIES 3 Sheets-Sheet 3 Filed March 18, 1930 Inventor P Wz'long Attorney.

Patented Sept. 5, 1933 UNITED STATES WINCH, ESPECIALLY FOR USE IN GRAN- IES Paul Wilsing, Duisburg, Germany, assignor to Demag Aktiengesellschaft, Duisburg, Germany Application March 18, 1930, Serial No. 436,823, and in Germany March 22, 1929 3 Claims.

The charging of granaries byv means of winches has hitherto been mostly effected with the aid of hydraulic winches, these having a few special advantages which have, so far, led to the exclusion of electric winches. For the most part, the

several storeys in a granary have no special platform on which the load can be deposited. On the contrary, as is shown in Figure 1 of the drawings, the load is lifted or lowered to slightly above the floor level of the storey concerned, and then swung, and as soon as the swinging movement brings the load inside the building, it is quickly lowered.

Owing to their slowness in starting, it has hitherto been impracticable to obtain such quick lowering of the load with the known electric winches.

The invention indicates a way in which the existing method of operating can also be employed in the case of electric winches, which',:'in

respect of first cost, running and attendance, are substantially cheaper than hydraulic winches. At the same time, the masses of the motor are utilized for acceleration in lowering, in which case their action is exactly the opposite to what it is in existing types of winches, being accelerative and not retardive. When the load is swung into the building, the motor, which, at this moment, is switched-on for lowering, will very considerably accelerate the winch and will thus deposit the load very quickly on the floor of the storey. Several ways in which this can be effected will now be described with reference to the drawings, in which Figure 1 represents the granary arrangement already referred to; I

Figure 2 is an elevation of the winch;

Figure3 is the winch in elevation and partial section; and

Figures 4 and 5 show different methods of opcrating the motor and clutch.

The winch according to Figure 2 is driven by the motor 1, which is connected to the main shaft 2 by means of a clutch 3, 4. The main shaft carries, on the one hand, the braking cone 5, and

on the other the small pinion 6 which actuates the drum or driving pulley 11 through the pinions 7, 8, 9 and the tubular shaft 10. The pinion gearing is housed in a casing 12 which, at the same time, carries the flange for the motor and the bearing for the drum 11. The brake cone 5 on the shaft 2 coacts with a recessed cone 13 in the drum 11 and normally tends to move into engagement therewith under the action of a helical spring 16 coiled about the shaft 2 between the bearing carried by the shaft 10 and a ball bearing of fixed position upon the shaft 2 but slidable in the shaft 10. The clutch 3, 4 is operated by means of rod mechanism 14, 15, which, as is diagrammatically indicated in the drawings is actuated either by hand, mechanical means,,or electrically by the so aid of a magnet. The method of operating is as follows: Assuming that the load is to be lifted into a storey current is first admitted to the motor in the direction for lifting, until the load has been raised a slight distance above the floor level of said storey, and is suspended in that position. Thereupon the motor alone is kept running, and when it has attained full speed and the swinging load has just made its way inside the building, the gear is switched-in and the load deposited 7o quickly. Corresponding procedure is employed whena load has to be conveyed from above downwards.

The control of the aforesaid movements can be effected in a great variety of ways. It is prefer- 7 able to make use of a control rod 20 (Figures 1,

4 and 5) which extends the full height of the granary and is connected with the controller 21 of the motor by a rod 22. The rod can be balanced by counterweights, so that it is easily oper- 30 ated. According to Figure 4, this rod is movable in the longitudinal direction and during such movement controls the motor in symmetrical directions. The clutch between the motor and the gearing, which, in the example shown, is arranged 35 I to be electrically controlled by means of the electromagnet, is actuated by a press button 23, I which switches the magnet independently of the manner in which the control rod is being operated forthe time being.

According to Figure 5, the rod 20, in addition to its vertical movement, can describe a rotational movement which is produced by means of the handle 24. Whereas, as stated, themotor controller is controlled by the vertical movement, the rotary movement acts mechanically on the clutch rod mechanism, by means of a known design of rod 25, irrespective of the setting of the controller for the time being. v

The motor is preferably designed as a sliding armature motor, since in that case the clutch can be actuated in the simplest manner by the sliding movement of the armature. As soon as the armature springs into the field, the coupling between the motor and the gearing is completed, and at the same time the cone 5 is moved away from the cone 13 against the action of the helical spring coiled about the shaft 2. This movement can be prevented, bythe magnet or the rod mechanism of the clutch 3, 4, which must accordingly exert a more powerful axial thrust than the motor armature.

The braking force can be intensified by providing the gear pinions with slanting teeth.

Since the sudden throwing of the motor into gear in the direction of lifting would set up powerful shocks, such action must be prevented by the aid of known devices.

In all cases in which the load is intended to be lowered, not only at a quick rate as described, but also normally by the action of the motor in the direction of lowering and permanently coupled' with the gearing, such permanent coupling must, of course, also afiord the possibility of releasing the rotary masses during the acceleration. This is the case in the example shown.

1. A winch with drum operated through gearing by an electro-motor with an axially movable armature having a brake for the gearing and a clutch .between the motor armature and the gearing, and an electro-magnet for controlling the operation of the said brake and the said clutch without a free falling position.

2. A winch with drum operated through gearing by an electro-motor with an axially movable armature and shaft and axially movable gear shaft separate from the shaft of the said armature and impelled to tend always to move towards the said shaft, coupling members respectively upon the gear shaft and the -armature shaft, braking members respectively upon the gear shaft and on a part of the winch which is not axially movable, and an electro-magnet controlling the movement of the armature shaft and adapted to exert an axial 'force greater than and in opposition to the axial force exerted by the armature.

3 A winch according to claim 1, wherein the clutch between the motor and the gearing is enclosed in the gear frame formed by the motor and,the gearing.

PAUL WILSING.

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