US2742262A - Winch - Google Patents

Description

April 1956 c. J. DRAWDY ET AL 2,742,262

WINCH 2 Sheets-Sheet 2 Filed Dec. 50, 1953 N N T51 INVEN TOR. Q f/IOMAS a. spa,

\ weaves E- DEA wa Y BY CUE 7/5 J7 DB4 WDY ATTOE/VE VS 2,742,262 WINCH ,J. Drawdy, Jesup, Lawrence E. Drawdy, Brunswick, and Th mas -Sp 'l -n ap lic tion nec mbe ao, 1953, Serial No. 461,172

rclaim. (01 254-186) invention relates to a winch and more particularly to a winch of'the type adapted to be mounted on a service United StatesPatentO "2,742,262 a en d Apr. .17, 195

: era'lly"33i"to the frame 16 for supporting the dif ferentialica'se in position on the'frame 16. A suitable fblock 34jis carried by the frame 16 and extends upwardly "midi s)! ra sing r lowering a load adjacent the, rear end 1 the eo A primary object of the invention to rotate a wind- .l'm sung the lifting of a oad a d to regul te th tliep riod that the load is being lowered. v

Another object is to insure thesmooth operation of "the winding drum during, both the Winding or un inding of a cable relative thereto.

The above and other Objects may be attained by em-.

ploying this imtention which embodies among its features a differential having drive axles mounted to rotate about a dommphraxis, brake drums carried by the drive axles ifor"rotation therewith, brake shoes carried by the ditfer- *ieritial adjacent the brake drums for engagement with said hralre'drums to arrest rotation thereof, a winding drum mounted adjacent one of the brake drums for rotation about the common axis, a coupling carried by the winding drum and bolted to the adjacent brake drumfor causing the winding drum to rotate in unison with said brake drum, and means carried by the differential and opera- ,tively connected to the brake shoes for selectively'moving said shoes into engagement with their respective brake 'drums and arresting rotation of one or the other of the drive axles. 7

Other features include hydraulically energized means of the winch; and

Figure 3 is a sectional view taken substantially on the line 3-3 of ,Figure 2. V

Referring to the drawings in detail, a service truck designated generally 10 is equipped with a conventional boom 12 which projects upwardly and rearwardly beyond the rear end of the service truck 10, as will be readily understood upon reference to Figure 1. v I

My improved winch designated generally 14 comprises a bed frame 16 upon which, is supported longitudinally spaced parallel cross beams 18 and end members 20 and 22. Carried by and extending between the end member 22 and the next adjacent cross beam 18 is a supporting channel 24 having longitudinally spaced openings 26 extending therethrough and carrying longitudinally spaced eyes 28, the purpose of which will hereinafter appear.

Carried by the end bar 20 and the next adjacent cross beam 18 are straps 30 which serve to clamp the axle hous ing extensions 32 of a differential case designated gen- ,isneeri er retrograde motion of thewinding drum during 1 carried by the differential and operatively connected to j therefrom between thecross member 18 and the end bar ZOandLcarried by the block 34 is a strap 36 which engages the p ropeller shaft housing 38, of the differential 33. A propeller shaft .40 is mounted in the housing '38 for rota- .tion aboutits longitudinal axis and .is connected within the 'interionof the differential housing 38 through a conven- 'tional train of gears 42 10 axleshafts 44 and .46 which extend t rough th extensions 32 and carry adjacent their ends remote from thefgear train 42 brake drums 48 and 50, respectively. I f, t p v (Mounted for rotation in bearings 52 about an axis which aligns withtheaxis er the axle shafts 44 and 46 is a shaft S4Vcarrying intermediate its ends a spool or winding drum 56 upon which a cable 58 is wound according to the 1 direction of rotation of the shaft 54. Integral with the shaft 54 adjacent the drum 50 is a flanged, cup shaped couplin'g 60, the outwardly directed flange 62 is provided with 'circumferentialiy spaced o eni'ngs which are adapted to register with circumferentially spaced internally screw threaded recesses formed in the drum50 for the recep- "titan of screws 64; which'passthrough the openings inthe flange 2-.andeuter the threaded openings in the drum 50 to cau e-the spool or inding drum 56 to rotate in unison wi hthe um 9: Th cupling opens toward drum .5-

and encloses the outer end of the axle shaft 46, with shaft 54 connected o closedendof the cou ling in coaxial alignment with axle shaft Qarried by the differential" h using 33 a ja ent theends of the tubular arms 32 are closure discs 66 whichserve'as dust caps to exclude dust d i fro t er r jofthe'drunis 48 and50, a d

carried by the disc 66' whichclosesthe drum/18 is a conventional brake shoe 68, the expansion of which is gov erned by a conventional hydraulic cylinder 70. The differential housing, arms 32, and discs 66 comprise, with the elements 16, 18, 20, 22, and 24, a stationary support structure. A similar brake shoe 72 is carried by the disc 66 which closes the open side of the drum 50 and the expansion of the shoe 72 into contact with the drum 50 is controlled by a conventional hydraulic cylinder 74. Mount 78, the brake shoe 72 may be expandedinto engagement with the drum 50 to arrest rotation of the spool or winding drum 56, whereas upon the manipulation of the plunger of the master cylinder 76, the, brake shoe 68 within the drum 48 will be expanded into contact with the drum to arrest rotation of the axle shaft 44 and cause anytrotarymotion imparted to the propeller shaft to be transmitted to the axle shaft 46 and hence through the drum 50 and coupling 60 to the spool or winding drum 56. Carried by and extending between the end bar 22 and adjacent cross bar 18 in spaced parallel relation with the supporting member 24 is a' shaft 84 upon which levers 86 and'88 are mounted to rock. These levers are coupled to the plungers of the cylinders 76 andj78 so that the hydraulic cylinders 70 and 74 may be manipulated I from a person stationed adjacent the hand levers 86 and 88.

Carried by the frame 16 at any convenient location is .the spool or winding drum 56, the hand lever 88 is moved to expel hydraulic fluid from the cylinder 76 t o the conduit 80 and .into'the cylinder 70 to expand the brake shoes '68 into engagement withthe drum 48. It will thus be seen that the brake shoe 68 will move into engagement with the brake drum 48 to arrest rotation of the shaft section 44 and cause the power transmitted to'the gearing 42 through the propeller shaft 40 to be taken up by the shaft section 46 and through the drum 50 to be transmitted through the medium of the coupling 60 to the winding drum or spool 56.' .This will cause thecable 58 to be Wound upon the winding drum and cause any weight carried-by the end of the cable remote from the winding drum to be elevated toward the boom 12. Whenit is desired to lower the load, the hand lever 86 is moved to expel fluid from the cylinder 78 through the conduit 80 to the cylinder 74 to cause the brake shoes 72 to expand .into contact With the drum 50 and simultaneously the hand lever 88 is moved to withdraw fluid from the cylinder 70 and permit the shoe 68 to disengage the drum 48.

With the shoe 72 frictionally engaging the drum 50, the speed of descent of the loadon the cable 58 may be gove'rned, or the descent of the load can be completely arrested according to the pressure of the fluid within the cylinder '73. g i p W While in the foregoing there has been shown and described the' preferred embodiment of this invention, it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

' drum independently of the other shoe.

What is claimed is:

A winch comprising a supporting structure; a pair of axle shafts having inner ends in spaced relation, said axle shafts being rotatably mounted on said structure; brake drums connected to the outer ends of the respective axle shafts for rotation therewith; brake shoes carried by said structure for arresting rotation of the respective drums and shafts; a spool rotatably mounted on said structure; a cable wound upon the spool; means connecting the spool and one drum for joint rotation, both drums being mounted on said structure in positions elevated above and wholly out of contact with a supporting surface over which the structure is disposed, for rotation of the drums free of restraint by said surface, the spool including a shaft coaxial with the axle shafts and lying wholly beyond the outer end of the axle shaft connected to said one drum, said means comprising a cup shaped coupling formed open at one end, said one end of the coupling opening toward said one drum and being formed with an outwardly directed peripheral flange secured to said one drum, the coupling enclosing the outer end of the axle shaft connected to said one drum, and the spool shaft being rigidly connected to the coupling at the closed end thereof; a differential drivingly connected to the respective axles; means connected to the differential for driving the same; and means mounted on said structure and connected to the respective shoes for shifting each shoe into engagement with its associated References Cited in the file of this patent UNITED STATES PATENTS 2,240,570 Oesterheld May 6, 1941 7 2,606,745 Ballet a1 Aug. 12, 1952 2,643,092 Paulette June 23, 1953 2,662,731 Smith Dec. 15, 1953 FOREIGN PATENTS 285,658 Great'Britain Feb. 23, 1928

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