US1874905A - Gear case - Google Patents

Description

Aug. .30; 1932. Q Q FE 1,874,905 I GEAR CASE Filed Sept. 22, 1928 3 Sheets-Sheet 1 Aug. 30, 1932. o. COFFEY 1,374,905

' GEAR CASE Filed Sept. 22. 1928 s Sheets-Sheet 2 II l iilmnnnul "lllllllllll 0. L. COFFEY Aug. 30, 1932.

GEAR GAS E Filed Sept. 22, 1928 I l l I i l I I IIZZZ'LI:

Patented Aug. 30, 1932 p osoAn stormy. or mnvEY nnINoIs, AssIGNoR "no wnrrrne CORPORATION, or nsnvnmrnnmors,Aoonrommon OF ILLINOIS i v. V F

GEAR cAsE,

a lication filed September 22,1928. f s riai in). 301657.

Theinvention-relates to gear cases. In cases for gearing, such, for example, as the cases used in trolleys on'cranes, .it-has been found desirable to fabricatethe structure, so far as possible, of wrought or plate metal, and one object of the invention is-to provide an improved gear case which is fabrie cated of plate metal and in which the gearing is carried or journalled in a supplemental cast frame which can-'be'readily machined before it is inserted-into the case, and so that the shell forming the case will not require. any machining,

Another object of the invention is to provide an improved gear-case structure in which the shell is fabricated of plate metal and is provided with a castframe in'which the gearingismounted or journalled. i a

Other objects =of the'invention will be apparent from a consideration of-the following detaileddescription; I

The invention consists in-the several novel features hereinafter set forth and more particularly defined by claims at the conclusion hereof. 5 Q

In the drawings which: accompany and form a part of this specification or disclosure and in which like numeralsof'reference denote corresponding parts thro'ughoutthe several views: Fig. 'lis a side elevation of a crane trolley or truck embodying the invention.

Fig. 2 is a plan, the cover of the gear case being removed. Fig. 3 is asection taken on I the line 33 ofFig. 1. Fig. l is a perspective of the lower-section 0f thegear-case. Fig. 5 is a perspective of the supporting frame for the gearing separated-from the case. Fig. 6 is a section taken on the line 66 ofFig. 1.

Fig. 7 is a section taken on the line 77 ofFig.l. H

The gear case'which forms'the subject mat- -ter of the invention is exemplified in connection with the truck frame of a trolleyfor' a crane. Thetruekframe is composed of a base 6, underlying cross-beams 5, and brace and tie bars 7. @Bearing brackets 8 are securedto the frame, andwheels 9ghave their axles journalled in said'brackets- Thebase Y 6 is composedof a platefi at the side thereof, I

over which the gearing for driving thehojisting drum'Qis mounted,and'iwhich'forms the i J bottom of 5 the case for said gearing and'a centraltransverseplate 6 f A mountlng plate 12'for a motor 13 for propelling the truck overlaps and is secured to portions of plates 6 and 6 The's'e plates are welded. to the beams 5-to form a rigidstructure. *A motor for operating a hoisting drum 15" through suitable gearing, is mounted on plate- 6 lhe gearing forjdriving" the hoistingfdrum" comprises a shaft 1'6which is driven by the motor through a shaftsection 16 and flexible coupling 16 pinion 17 fixed to 'sha t 16;'ja gear 18meshing'withpinion 17 asha'ft 19 driven by the gear18 through a suitable "load 'brakewhichmay be of'the constructionset forth inanapplication filed by me Septem-.

ber 20,1928, Serial No. 307,372; a pinion 20 fixed'to shaft 19 ;-and a gear- 21 meshing-with pinion 20 and fixed'ito the hoisting drum- 15 "In practiceit is necessary to, provide'aii'en closing case for this gearing, which is adapt ed to contain oil for lubricating the gearing and preventing excessive heating of the load this gearf case is composed ofplates'which arewelded together so lubricant-will bereta'inedtherein. :=-The plate 6 of the'truck base-forms the bottom of the gear case; Vertical'end plates 23 and'24, and side plates '25 and 26 'arewelded together to form'the lower '70 and rotatingwith the shaft 22 for said drum. 3 r

brake. fAccordingto'the present' invention section of the gear case. These plates'eX- tend upwardly approximately to theaxisof shafts 16, 19 and 22. The top of the caseis "formed by a cover section 30 which is also ,built up of plateswelded together. An angular bar 31 is secured to the lower margin of section-30 and has a horizontalfiange 3P adapted to rest on the upper edges of'the plates forming the lowersection of the case 'anda vertical flange 3lt0 lap the outer faces of said platesto forma substantially tight :joint "between the ease-sections.- U-shaped "handles" 32 are secured to the cover. A recess or pocket for one of the truck-wheels 8 is formed in the 'lower portion of the lower 'sectionbfthe case by vertical plates 33jand 33 and a horizontal plate'33 ;The" eet- 'ing edges ofall of the platesfo'rming the V lower section of the box are welded together,

as at 34, and the Vertical plates are welded to the base plate 6 at to form a rigid rectangular structure. A case frame 36 is mounted in the lower section of the case, and is adapted tosupport the gearing for operating the drum-15. This frame comprises sides 36 and 36 ends 36 and 36, and a crossbar 36 all of which are integrally formed or casttogethe'r. 'A'spacing and reinforcing plate 38 is welded to the inner face of the plate 26, andispacer and reinforcing plates 39 and 40 are welded to the inner face of plate 25. Bolts 37 extend throughthe framesides and boX-sides'a-nd the spacing plates to removably secure the frame 36 in the lower section of the case; This frame is provided with apair of aligned seats 36 to receive the bearings for the shaft 16 which are heldin the seats by caps 41; a pair of aligned seats 36 to receiveor form bearings for the shaft 19, and a seat .36? to receive or form a bearing for the shaft 22of the hoisting drum. Caps 42 are adapted to secure the shaft 19 in the frame. Plate 26 is formed with a semicircular opening 26, through which the hoisting drum 15 extends. Side 36 of frame 36 is formed with'an opening 36; for. the drum. A semi-circular groove 36 'is formed in the outer face offside 36 of the frame to receive and retain a packing ring 44; around the drum, forthe purpose ofpreventing-theescape of lubricant. a V

The frame is machined before it is inserted into the case, and it is cast with an integral cross-bar 36 to rigidly cross-connect the sides of the frame and prevent breakage .whilethe frame is being machined. l After the frame has been machined and before it is inserted in the case,the bar 36 is cut away.

The invention exemplifies a case for gearing which is formed of plates of metalwelded together and an inserted frame whic'hcarries the gearing-bearings and canbe machined before it is inserted in the case. The frame forms, a unit which can be removed from the case conjointly with the gearing, or which permits any of the shafts to be separately removed. The plate metal formation of the case renders it strong and durable, and makes it possible "to form it asan integral part of tersPatent, is: 1- Y 1. The combinationof a case comprising a lower-sectionformed of a bottomplate', side i and end-plates of wrought metal welded together and a removable cover section formed of a top plate, side and end plates of wrought metal welded together, the side and end plates of the cover section being adapted to fit against the side and end plates of the lower:

section respectively, a cast metal frame'disposed in andsecured to the lowersection,and gearing mountedr in theframe and-enclosed by the two sections. 7

f 2. The, combination of a casecomprising a lower section formed of a bottom plate, side and end plates. of wrought metal welded together and .a removable cover section, a cast "metal frame disposed and secured to the .lower section of. the case, plates welded to the inner faces of thesicl'eplates and arranged to space the framefromsaid side plates, and; gearing mounted in the frame.

3. The combination of ai base comprising a lower section formedfof wrought metal plates weldedtogetheranda removable cover section, a rectangular, cast metal frame disposed in the lowersectionof the caseand em-v .bodying sides and ends, spacer-plates for the frame welded to certain plates of the lower section and positioned so as-to engage the sides of the frame, bolts;extending through the spacer-plates and the frame-sidesfor securing the frame in said lower section of the case, and gearing mounted in the frame. i

4:. The combination of a case comprising a bottom plate,end plates and side plates of .wroughtmetal all welded;together, a cast metal frame disposed, in the case, spaceri ng through the sideand spacer plates forsecuring the frame in the case, and; gearing mcninted in the frame-L, T. .1

-5. The combination ofgan enclosing case comprising a bottom-plate, side and end plates of wrought metal welded together so {as to form a fiuidtight compartmentgfor'retaining'a lubricant, a cast metal frame in the compartment connected to the case so that it .1s supported; thereby and having bearings machined therein',and gearing mountedin the frame sothat it isjlubricated by the lubricant and embodying shafts journalled in the plates welded to the side-pl;ates,,bolts extendaforesaid-bearings and extendingthrough openings inthe side plates of the case.

7' 6. The combination of'an-enclosingrcase comprising a bottomplate', side and end plates ofwrought metal weldeditogether so as to form a fluid tight compartment for retaining a lubricant, a cast metal frame disposed inthe compartment and secured to" the 'side plates of the case so that it is held in.

spaced relation with respect to the bottomplate, and gearing mounted in the frame. I

7. The combinationfof an "enclosing case comprising a lower, 1 section formed 2 of wrought metal plates rigidly secured. together, and ajremovable .cover selction formed of wrought-,m'eta-lplates rigidly secured together, a cast. metal frame. disposed in and V supportedbythe lower; section of the case, and

gearing including a shaft and mounted in the frame, the lower section and cover sectionv having complementary openings formed in two of the plates thereof through which the shaft extends. V

8. The combination with a truck embodying a base plate, of an enclosing case comprising side and end plates of wrought metal rigidly secured together, said plates being secured to the base plate of the truck and forming therewith a compartment, a cast metal frame disposed in the compartment and supported by the case, and gearing mounted in the frame.

9. The combination with a wheeled truck embodying a base plate, of an enclosing case mounted on the base plate and formed of wrought metal plates arranged to form a pocket for one of the wheels of the truck and a fluid tight compartment, a cast metal frame disposed in the compartment and supported by the case, and gearing mounted in the frame. 7

Signed at Harvey, Illinois, this 31st day of May, 1928.

OSCAR L. COFFEY.

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