US1781281A - Crane trolley - Google Patents

Description

Nav. 11, 1930.

A. E. HOGREBE CRANE TROLLEY Filed July 6, 1928 6 Sheets-Sheet l INVENTOR.- ArZhzzI'EHog/reb@ ,Ak LMHEINI www?,

A TTORNE Y Nov. 11, 1930. A. E. HoGRr-:BE

CRANE TROLLEY Filed July e, 192s 6 Sheets-sheet 2 INVENTOR: Aihurff. frebe,

A TTORNEY.

N0v.11`, 1930. AEHOGREBE. V y 1,781,281

CRANE TROLLEY Filed July 6. 1928 6 SheetsvSheet 3 n INVENTOR.

jlrmr Egrebe,

WITNESSES:

ATTORNEY.

Nov. 11, 1930. A. E. HQGREBE CRANE TROLLEY Filed July 6, 1928 6 Sheets-'Sheet 4 WITNESSBS:

A TTORNE Y.

Nov. l1, 1930.

A. E. HOGREBE CRANE TROLLEY Filed July 6, 1928 6 Sheets-Sheet 5 ELLE- 7- INI/ENTOR: Ariba? WITNESSES:

Hgrebe,"

ATTORNEY.

Nokl 11, 1930. A. E, HOGREBE '1,781,281

CRANE TROLLEY Filed July 6, 192V;` 6 Shee'tS-Shee 6 WITNESSES:

I N V EN TOR: Arhur E Ij'ngrbe) BY W Mmm?. M

i ALin fno Patented Nov. 11, 1930 l UNITED STATES PATENT oFFlcE y ARTHUR n. noennnn or PHILADELPHIA, PENNSYLVANIA, AssirGNon To Box CRANE & HOIST CORPORATION, OF PHILADELPHIA, PENNSYLVANIA, A` CORPORATION F i DELAWARE CRANE TROLLEY This invention relates to traveling cranes i and has particular reference to the trolleys which travel thereon for lifting and moving weighty articles',

Y i15 One of the objects ofthe inventionlis to provide an improvedcrane trolley.

`Another object of the invention is to provide a crane trolley whose parts are so arranged that it will have a greatertraverse movement.` "Another object ofthe invention is to pro- 1 Videla trolley so constructed that it may be "mounted closer tothe roof of a buildingin Vorder `to permit loads to be lifted to greater heights; i i

*Still another object of the invention is yto provide a crane trolley whosemotors are so positioned asfto permit the bridge to be 'moved to the outermost limit of its supporting rails. i i

According to the invention, the crane trolleyis arranged with side frames andconnectingmeans between thesame, the side frames having integral extensions onmounting a hoist motor parallel with one of the frames and a traversemotor parallel with the other frame, said extensions being so arranged that the"motors arebelow the tops of said `frames. V

tegral bea-rings for supporting the traction wheelshafts and with integral bearings for supporting the hoist drum .shait. The mechanism for operating the traction wheels and the hoist drum may also be mounted and connected with the` respective motors in integral housings formed on said side frames.

The drawings illustrate an embodiment of the invention and` the views therein areas follows: i VFigure l is a top plan view, partly broken away, of a traveling crane having a trolley `constructed according to` my invention,V

` Figure 2 an end .view7 thereof, Y, i -Figure a top plan view of the trolley with certain parts broken away,

drive side of the trolley, the gear ons@ Cover 59- .bcng'lbroken open, f l t i The side 'frames may be provided with indesignated as 26 being idle' wheels.

Figure 5 is a cross-section taken on the line `5-#5 Vof Figure2 but showing the block in raised position, i

Figure (iis an enlarged elevation of the hoist drive side ofV the trolley, the gearcase cover being omitted,

Figure 7 an enlarged fragmentary crosssection taken on the line 7 7 of Figure 1 but showing the block in raised position and the casing of the limit switch broken open, and

F lgure 8 a wiring diagram showing the connectionsV between the several motors, brake release solenoid and limit switch.

Figure l illustrates the manner in which the bridge is mounted onthe bridge tracks 1l through the wheels 12 which are located near the corners of the bridge and, as shown, are mounted between the tie beams '14. The outer ends of the tie beams arefastened together between thetwo tracks 11 by a side beam 16 at each end thereof. i

The bridge tracks are ordinarily mounted onsuitable girders orIj beams 13 which are ed trolley tracks 18.

The bridge `here shown is in fskeleton form, the driving motor for the same and other mechanism having been omitted as the invention herein refers particularly to the trolley and only such parts of the other apparatus as are necessary for the explanation of the invention have been shown.

The trolley, whichis generally designated as 19,` provided with side frames 2l and 22 which are connected by means of the intermediate channel member 23. The trolley is also `provided with traction wheels, two of the same .characterized by the numeral 24 being the driven wheels, and the other two Each pair of wheels is mountedon an axle 27 and t i -28,yrespectively. Figure t is an elevation of the traction y "The trolley fis alsoprovided with a hoist drum 29 which has a shaft 31 extending throughthesameanclths drum is located Abetween the axles 27 and 28 andpnearer to vthe latter. Y c Y rThe drum 29 is provided with a cable 32, the ends of which kare fastenedy by means of clamps 33tofsaid drum and said cable passes downward under sheave wheels 34 rotatably mounted in the block 36 to which the hook 37 is attached, and'then'ce upward and over an equalizing pulley 38 which is mounted between the' bracket-"39 and a plate 41 Whchis securedto the channel-23.V

j The idle'wlieels 26 of the trolley are secured to the axle 28 andthe ends of the axle pass into bearing housings ywhich are inte-V grally formed i in the side frames 21 and 22 and which are provided with ball bearings 42.

Thetraction wheels 24 are also securelyu mounted on the axle 27 and one 'end of the same passes into arbearing housing in the side franiep21 which-ispro-Vided'with a suit-able ball bearing 43,7while the other end vof said axle extends -througha bearing housing 44, in ,the` side'frame 22, provided with two ball bearings 46 and intoa gear housing 47.` Vllhis end Aof. the axle is provided with a worm wheel 48.

Referring now side frame 22 is also provided with anexl i Y The shaft'52of this mot-or is provided onV 'its one end with apinion v53 which meshes tension 49to which, a traverse motor 51. is

fastened.v 1

- Vwith a pinion 54 fastened to the end of a shaft Y 56 which is located;l in the housing -47 and which rotates in the Yball bearing 57 and ini-a similar ball [bearing 'located within the cover 58: n

y The shaft 56 isprovided with aaworm 59 which meshes with the worm wheel 48 on the end of the axle 27 so that the traction wheels 24" are rotated through the medium of the motor shaft 52, the pinion 53 meshing with thepinion 54 ony the shaft'56, and the worm 59 meshing with the'worm wheel 48. v

Y The gear housing 47 is provided with a 'cover 61 whichcompletely encloses said gear Y .mechanismvand thevone end ofthe traversev motor 51. 1

One-,end of the shaft 31Vofthe hoist drum 29 extends into abearing housing 62: in the:`

side frame 22 where it is provided with ball bearings 63 andthe other end of said shaft extends into a loearingfhousmg 64 formed integral with the side frame 2 1 `and saidfhousing isprovided with Va' pair of ball'bearings 6.6u while the outer'endY of said shaft extends yinto the O'ear housing v67Y and' isE provided, on its outer end, with. a worm wheel 68.

YH'Referring now'to Figures 1, 3 and 6the side frame21' is provided with an ii'itegralY extension69 to which aino'tor 71 is connected by the flange 72. The 'end of th'e'inotor shaft 73, whichV extends-into the gear housing 67,

FiguresY 2, 3 and4, the f 77. This shaft Vis suitably mounted inthe ball bearings v7 8 and is provided with a worm 79 which meshes with worm wheel 68 `on the end of the shaft131 of the hoistdrum 29.

rlhe gear housing is provided with a-cover 80 for enclosing the inechanisinand the open end of inotorf7'1.

The outer end of the shaft 73'of the motor i y 71 is provided with a friction` drum 81 while `the side frame 2.1 4has`abraclietj82 secured thereto, said bracket having brakebands 83 vand '84 pivotally connected thereto at' the points 86, the'bottom ends ofsaid bands beL ing connected to a spreading mechanism-87, the outer end of which connects to a yvertical plunger 88 which ext-ends upward into a. sole- `noid 89, saidv solenoid being. fastened to a Y Y. A

plate91 connected to the,bracket82.,V

In orderto limit the height at which the Y block may he raised'so that the same will notV vstrike the equalizing pulley 38, a limit switch 92 is mounted on a bracket 93'whicli in turn is mounted on the plate 411fconnected to the channel 23.l i .c e. ,f

This limit switch consists of aY casing` 94 containing fixed contacts96and 97.-,y A con-v tact-lever 98, hinged at 99Y in the casing and on the side frame 21. This armvl04is adapt-`V ed to be engagedby'the .block 36 when the Y same reaches its uppermost position andas the said arm is raised, the compression spring 103 will swingthe lever 98Hupward on its vpivotedpoint 99 so that the contact- 101will be drawn upwardly fromthe contactsv'96. and 97, therefore breaking the electric circuit. 1 l

During the normal operationof the hoist, the plunger 88 of the solenoid is in its raised position owing tov theenergization of .said

solenoidbut whenftheblock 36 vreachesfits upperinos'tfpositionand operates the limit switch ,92, said plungervwill fall and permit.V

the brake bands 83 and 84 tofri'ctionally engage the brake druin'-Y to stop the motor71,

Vas laterfexplained in connection with-Figwiring diagram showing the v ll2i1 Figure 8 isa method in which the severalinotorsofl theV crane, the limit switch, the brakev Vrelease solenoid, and ,thej automatic vswitch are cony zne'cted. isprovided `with a pinion 74 which meshes with'za pinion 76 onfthe innerendofla, shaft" i In this Wiring diagram, motor which has been excluded fromxtlen showing i no in the other views is designated by the numeral 108. The bridge motor 108, the traverse motor 51 and the hoist drum motor 71 are each of the A. C. three phase type. 109, 111 and 112 designate the controllers for the motors 108, 51 and 71, respectively.

113 represents a main switch from a source of three phase alternating current and is connected to the three wires 11-1, 115 and 110. These wires extend to a three pole-single throw switch 117 in the bridge motor circuit so that when said switch is closed, this'motor may be operated through the controller 109.

The wires 114, 115 and 116 are also connected with a three pole-single throw switch 11,8 which, when closed, permits the traverse motor 51 to be operated. through the control- Y ler 111.

y when the same is closed, the relay will be energized so that the three phases of the lines i 114, 115 and 116, which are controlled thereby, will be closed and the hoist drum motor 71 then may be operated through the control 112.

However, if the limit switch 92 has been opened by the raising of the bloc-lr to its highermost position, as before explained, then the relay will be cle-energized and the wires constituting the three phases to the hoist motor will be opened.

In orderto operate the hoist motor, it will then be necessary to close the shunt switch 121 which will energize the relay coil 120 so as to close the contacts of the three phases leading to the motor 71.

An auxiliary switch 122 is provided for opening the hoist motor circuit quickly, if desired, by cle-energizing the relay coil 120.

The solenoid 89 is energized through wires which extend across a single phase of the lield winding of the motor 71 and upon the opening of the limit switch 92 and the deenergizing of the relay 120, the automatic switch will be opened and the solenoid cle-energized so as to permit the brake bands 83 and 84; to frictionally grip thebrake drum 81 `and thereby stop the motor 71.

During the ordinary operation of the niotor 71, and when the limit switch 92 is closed, the switch 121 will be opened as the connection is made through the switch 122.

By reason of the location of the hoisting and traverse mechanisms, the hook 37 may be raised to the highest possible position, as there are no overhead obstructions on the trolley. Figures 3 and 5 illustrate this principle. i

For the same reason the trolley is` made much more compact and narrower which permits of a greater hook approach toward the side walls of the building.

Both of these features permit a greater utilization of space in a building, and therefore its employment virtually adds to the available cubical capacity of the building.

With the arrangement of the trolley side The location of the motors above the side r beams 1G also permit the motors to extend beyond the limit of travel of the bridge so that the hoist may be used in portions of the building and against the walls thereof, hitherto inaccessible to the same.

The crane trolley herein illustrated may be modified in various ways without departing from the invention herein set forth and hereafter claimed.

The invention is hereby claimed as follows: i

l. A crane trolley having side frames, means on one of said frames for supporting a traverse motor longitudinally parallel thereto and below the top of said frames, bearing housings on said frames for supporting a hoist drum shaft, means for supporting a hoist motor on the other frame and longitudinally parallel to said frames, and a housing on said last frame for housing gear means and mechanism for connecting said means to said hoist motor, the mechanism between the means and motor being so arranged that the motor may be mounted below the top of the side frames.

2. A crane trolley having side frames, means on one of said frames for supporting a traverse motor longitudinally parallel thereto and below the top of said frames, bearing housings on said frames for supporting a hoist drum shaft, means for supporting a hoist motor on the other frame and longitudinally parallel to said frames, and a housing n said last frame for housing a worm wheel and mechanism for connecting said wheel to said motor, the mechanism between the worm wheel and motor being so arranged that the motor may be mounted below the top of the side frame.

In testimony whereof I have signed my name to this specification.

ARTHUR E. HOGREBE. j

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