US2521216A

US2521216A - Pivoted hoist with adjustably supported arm

Info

Publication number: US2521216A
Application number: US29145A
Authority: US
Inventors: Hauk Joseph
Original assignee: Allis Chalmers Corp
Current assignee: Allis Chalmers Corp
Priority date: 1948-05-25
Filing date: 1948-05-25
Publication date: 1950-09-05
Anticipated expiration: 1967-09-05

Description

Sept. 5, 1950 J. HAUK 2,521,216

PIVOTED HOIST WITH ADJUSTABLY SUPPORTED ARM Filed May 25, 1948 Patented Sept. 5, 1950 PIVOTED HOIST WITH ADJ USTABLY SUPPORTED ARM Joseph Hank, Waukesha, Wis., assigner to Allis- Chalmers Manufacturing Company, Milwaukee, Wis., a corporation of Delaware Application May 25, 1948, Serial No. 29,145

6 Claims.

This invention relates in general to a hoisting device and more particularly to a hoist which may be adapted vfor operating a device for filing the slots of a cylindrical laminated core.

In the use of other known hoist devices, there exists a dificulty in adjusting the hoist for quickly aligning its cable with a slot of the core and in readjusting the hoist for quickly aligning the cable with another slot of the core.

To reduce the time necessary for adjusting a device of the type considered, it is advantageous to use a hoist which may be mounted on the end of a core and which provides means for adjusting the radial positie-n and the angular position of the cable support.

It is therefore an object of the invention to provide suitable power means such as a hoist for operating a device for filing the slots of a cylindrical laminated core.

Another object is to provide a pivoted hoist which is supported at a point adjacent the cable pulley and at another point.

Another object is to provide a pivoted hoist in which the cable pulley and a support may be adjusted radially independently of each other.

Another object is to provide a pivoted hoist which may be adjusted radially for supporting the hoist on the frames of cores of different diameters.

Other objects and advantages will be apparent from a consideration of the following description taken in consideration with the accompanying drawing, in which:

Fig. 1 is a View in elevation of a pivoted hoist built in accordance with the present invention and shown mounted on an end of a cylindrical laminated core, each having parts thereof broken away;

Fig. 2 is a top View of the hoist shown in Fig. 1, with additional parts thereof broken away; and

Fig. 3 is a stepped, cross sectional view of the hoist shown in Fig. 1, taken along the line III-III.

Referring more particularly to the drawing by characters of reference, numeral 4 generally designates a cylindrical laminated core, such as the core of a dynamoelectric machine. The core is assembled in a stator frame 5 on which the hoist may be mounted through uprights 6 bolted or clamped firmly to the frame.

Horizontal beams I of the hoist span the core along opposite radii and are fastened to the uprights E by suitable means such as bolts 8 which may be loosened for centering the hoist on the core.

An annular pivot plate 9 having longitudinal ribs I Il is rigidly mounted on the beams 'I by bolts II fastening the ribs to the beams. The inner part of pivot plate 9 forms a hub I2 containing a bushing I3 for a shaft I4.

The shaft I4 is keyed at its upper end to a worm wheel I5 having a hub IB. The worm wheel is held in place on the shaft by a pair of shaft collars I 'I fixed to the shaft by pins I8 on each side of the hub I6. The lower shaft collar Il is seated on the bushing I3 and the hub I2 of plate 9 for supporting the shaft I4.

The worm Wheel I5 is operatively connected to a worm I9 Xed to a shaft 2G which is supported in bearings 2| mounted on beams l. Fastened at each end of shaft 20 for rotating the worm I9 is a handwheel 22.

A table 24 is welded tothe lower portion of shaft I4. The bottom surface 25 of pivot plate 9 contacts part of the upper surface 26 of the table. The table extends beyond pivot plate 9 in a generally diametrical direction. Its lower portion is machined to form ribs 2l to which are attached rails 28. The ribs 2l, the rails 28, and the undersurface of table 24 denne a slide bed. A slide member 30 having machined grooves 3i is inserted in the bed with the rails 28 tting into the grooves 3i for slidably supporting the slide member. The slide and the table cooperate to dene a channel 32. Contained in channel 32 and rigidly attached to the slide 3E]l is a nut 33. A screw 34 extending longitudinally of the table in channel 32 is tted in nut 33. The screw is pivotally supported in the ends of the table, and is secured against longitudinal movement in the table by collars 35 and pins 3B fastened to the ends of the screw 34 at each end of the table.

At one end of the table a handwheel 38 is mounted for turning a set of gears 39. One of the gears 39 is xed to an end of the screw 34 for turning the screw.

The slide is provided for adjusting the radial position of at least the guiding pulley of the winch used for drawing a ling device through the slots of core 4. In the embodiment shown in Fig. 1, to the slide 33 are attached, as by welding, a pair of plates 4@ forming an essential part of the framework of a winch 4I of any known construction. The winch may comprise a threaded drum 42, a cable 43 connected thereto, and a motor 44 of any suitable known type for rotating the drum 42. The winch may be provided with any suitable known control mechanism such as a clutch 45, for operatively connecting the motor to the drum, and with a brake 43 for retarding movement of the drum. The motor 44 is shown as an air operated motor driven by compressed air supplied from a suitable source (not shown) through a hose 41.

Pivotally supported in the frame formed by the plates 40 is a pulley 49 on which the cable 43 may be guided. The winch frame supports an arm 50 comprising a pair of channel irons 5I each slidably mounted between a pair of L- shaped rails 52 welded to the plates 40. outer ends of the channel irons are connected together by a cross member 54 for retaining each channel iron between its pair of L-shaped rails.

For adjusting the radial position of arm 50, channel irons l are connected to the plates 40 by a pair of screws 55. Each screw may be locked by a pair of lock nuts 51 to a flange 58 welded to the plates. A pair of lugs 59, rigidly attached to channel irons 5l, are tapped and threaded for receiving screws 56. Nuts 6E! may lock the screws 56 to the lugs 59.

For additionally supporting the winch 4l, an adjustable leg 52 comprising a screw 63 is connected to the arm 50 through cross member 54. The screw of leg 52 may have a pivot foot 64, which is shown resting on an end surface of the frame 5. The leg 62 may also be provided with a handwheel 65 for turning the screw 63.

The preferred embodiment of the hoist herein described is shown mounted on a frame 5 of a stator of a dynamoelectric machine, and the cable 43 is shown connected to a filing device 65 shown positioned in one of the slots 61 disposed about the bore of the cylindrical laminated core 4. In the following description it will be assumed that the axis oi" core 4 is vertical, but it will be understood that the hoist may also be used in connection with a core having a horizontal or inclined axis.

To use the hoist for operating the filing device as shown, the uprights 6 are mounted on frame 5 on opposite radii. Beams 1 are rested on uprights S in proper position bringing the axis of shaft i4 in coincidence with the axis of core 4. The beams then are fastened to the uprights by means of bolts 8. The bolts allow a predetermined range of adjustment of the distance between uprights 6 to permit mounting the hoist on frames of different diameters.

After beams 1 are thus positioned, the hoist is adjusted to bring cable 43 in one of the slots of the core. Handwheel 38 is rotated, causing screw 34 to turn in nut 33. The nut 33, unable to turn with the screw, travels along the screw and moves the slide 35 in the bed of table 24.

Since the slide is welded to plates 4c, turning r handwheel 38 causes winch 4|, including pulley 49, and the arm 50 with its leg E2, to be moved radially with respect to the table 24 and to the core. Handwheel 33 is rotated until cable 43 is aligned with one of the slots 61 of the core, as shown in Fig. 1.

The leg 62 is then positioned above a surface of the frame 5 by adjusting the radial position of arm 50 independently of the radial position of winch 4|. For this purpose, nuts 51 are loosened, the arm is moved radially until the leg 62 is positioned properly above the core, and the arm is locked in its position by tightening nuts 51 against flange 58. The effective length of the leg 62 then is adjusted by turning the screw 63 until there is a small clearance between the surface of frame 5 on which the leg is to stand and the foot 54 of the leg.

The hoist then is properly positioned for use with the iiling device 66 for ling the slots of the The Y cylindrical laminated core 4. Before the filing operation is begun, handwheel 38 is rotated to move the winch and the leg radially inward until the alignment of cable 43 is brought within the bore of the core. The filing device G6 may be attached to the cable, and the winch 4l operated to lower the ling device below the core 4.

Handwheel 38 then is oppositely rotated to move the winch 4l and leg 62 radially outward for realigning the cable 43 with the slot 61. The filing device being properly inserted in the slot, the winch is operated, winding the cable 43 over pulley 49 and on the drum 42 and drawing the device upward through the slot. This operation may be repeated if it is desired to again draw the filing device through the same slot.

When the filing device is being drawn through a slot, the reaction of the core 4 to the filing device, transmitted through the cable 43, pulls down on the winch and causes the foot 64 of leg 62 to be pressed firmly against the frame 5. The clearance between the leg and the frame is taken up by the resiliency of the beams 1 and of the arm 5). The leg 52 thus additionally supports the table 24. When the filing device is drawn clear of the slot, the resiliency of the structure causes the foot 54 to lift and again have clearance from the surface of the frame 5. Therefore the radial position of the winch 4I, its pulley 49, and the leg 62, may be adjusted without readjusting the length of the leg 62.

For filing another slot of the core 4, such as an adjacent slot, the winch and leg are moved radially inward. Handwheel 22 then is rotated, revolving worm i9 and worm wheel i5. Shaft I4 being rigidly connected to worm wheel I5 and to table 24, rotates with the worm wheel and pivots table 24 with it. The angular position of table 24 is so adjusted that the cable 43 is radially aligned with the slot to be led. The hoist then may be adjusted as described above preparatory to lowering the device out of the slot, and for realigning the lcable with the device when it is inserted in the slot.

Although but one embodiment oi the present invention has been illustrated and described, it will be understood that changes and modifications may be made therein without departing from the spirit of the invention or the scope of the appended claims.

It is claimed and desired to secure by Letters Patent:

l. A hoist comprising a fixed horizontal beam, a vertically pivoted table supported on said beam, a power winch attached to said table, a leg connected to said winch for additionally supporting said winch, and means for adjusting the radial positions of said winch and said leg.

2. A hoist comprising a fixed horizontal beam, a vertically pivoted table supported on said beam, a power winch attached to said table, a leg connected to said winch, common means for ad justing the radial positions of said winch and said leg, and additional means for adjusting the radial position of said leg independently of the position of said winch.

3. A hoist for operation above a fixed structure, said hoist comprising a horizontal beam, means for supporting said beam at a fixed height above said structure, a vertically pivoted table supported on said beam, a winch mounted on said table at a fixed height above said structure, a leg extending downward from said winch for additionally supporting said winch on said structure, and means for adjusting the length of said leg to conform to the height of said structure.

4. A hoist comprising a fixed horizontal beam, a vertically pivoted table supported on said beam, a power winch attached to said table, a leg connected to said winch for additionally supporting said Winch, means for adjusting the length of said leg, and means for adjusting the radial positions of said Winch and said leg.

5. A hoist comprising a fixed horizontal beam,

a vertically pivoted table supported on said beam, l0

a power winch attached to said table, a leg connected to said winch, means for adjusting the length of said leg, common means for adjusting theradial positions of said winch and said leg, and additional means for adjusting the radial position of said leg independently of the position of said winch.

6. A hoist comprising a xed horizontal beam, a vertically pivoted table supported on said beam, a power winch attached to said table, a leg connected to said winch for additionally supporting 6 said winch, and means for adjusting the radial position of said leg to cause said leg to effect its supporting action at an adjustable distance from the pivotal axis of said table.

JOSEPH HAUK.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 112,829 Middleton Mar. 21, 1871 679,840 Graham Aug. 6, 1901 734,187 Matthews July 21, 1903 1,314,257 Fay Aug. 26, 1919 1,564,133 Fraser Dec. 1, 1925 1,720,240 Saborsky July 9, 1929 1,720,956 Heineke et al July 16, 1929 1,855,892 Schiebeler Apr. 26, 1932 2,342,942 Johnston Feb. 2'9, 1944