US2145767A - Power applying unit - Google Patents

Description

. Jan. 31, 1939.

' POWER APPLYING UNIT Filed Nov. 12, 1936 3 Sheets-Sheet 1.

llllllllllllllllllll A. F. KLASING 2,145,767

18.11.31,]939. v A. F. KLASING POWER-APPLYING UNIT' Filed Nov. 12, 1956 s Sheets-Sheet 2 las i & fl astuslrr A. F. KLASING POWER APPLYING UNIT Jan. 31, 1939 3 Sheets-Sheet. 3

' Filed NOVnl2, 1936 "flu g'mtuFKlaiig Patented Jan. 31, 1939 UNITED STATES PATENT osrles Augustus F. Klasing, St. Petersburg, Fla. Application November 12 1936, Serial No. 110,513

. 3 Claims.

Generally stated, the object of the present invention is to provide improvements in power applying unitsof the general type disclosed in the aforementioned Klasing patent, to the end of reducing the production cost of such units while increasing their durability and reliability and unit over ,long periods oftime rendering them generally more satisfactory in service.

1 More particularly stated, certain objects of the present invention are to provide a construction whereby the parts of the unit may be assembled and disassembled with facility and whereby the parts 'are held in a simple, effective manner againstaccidental disassembly; to provide for adequate lubrication ofall working parts of the without manual attention; and to provide in an improved way for ready interchangeability between different hand the unit such, for example,

'of'the invention is better understood, the same consists in the novel features of, construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated I in the accompanying drawings and defined in the verse section through the J appended claims.

In the drawings, wherein like characters of referencedenote corresponding parts in the different v1ews:- I a g Figure 1 is a front elevation of a power applying unit constructed in accordance with a practical embodiment of the invention, the lower half of the hand wheel operating element of said unit being broken away to show the underlying portions of the unit. K

Figure 2 is a side elevation of the unit shown in Fig. l.

Figure 3 is an enlarged central, vertical, transunit.

Figure 4 is a section on the line 4-4 of Fig. 3.

, Figure 5 is a fragmentary front elevation of 'theportion of the housing of the unit in which a pawl for cooperation with a gear of the unit is housed.

7 Figure I is a view porting shaftfor the pawl referred to.

partly in side elevation and I partly in section of the pinion shaft of the unit.

Figure 6 is a detail perspective view of .the sup tion to hold the gear with which it cooperates against rotation in one direction.

Figure 9 is a viewsimilar to Fig. 8 showing the pawl disengaged from the gear with which it cooperates.

Figure 10 is a fragmentary side elevation illustrating a lever operating element for the unit.

Figure 11 is a section on the line ll--Il of Fig. 10; and

Figure 12 is a, section on the line l2-l2 of Fig. 11.

Referring to the drawings in'detail, it will be observed that the present power applying unit includes, as usual, a supporting means in the form of a housing, designated generally as A, which is closed at its top, partly closed at its sides, open at its bottom, closed at its front and rear by walls I 0 and 'l I, respectively, and provided with suitable formations l2 adapting it to be bolted or otherwise suitably fastened to a car body or other structure on which the unit is to be used. 1 I

- At points suitably spaced downwardly from the topof the housing A the front and the rear walls 10 and l I of said housing are provided with alined openings l3 and I4, respectively, in which are supported the outer and the inner end portions, respectively, of a drum shaft l5 having rotatably mounted thereon, between said walls It and H, a drum l6 and a spur gear ll, which latter is integral or otherwise rigid with said drum.

In mounting the drum I6 and the spur gear ll on the shaft 15, the drum and the spur gear first are positioned between the housing walls it and I shape on the outer end of the shaft engages in a square or other suitable polygonally shaped recess 19 in the outer housing wall ID. A cotter pin 2%) or any suitable equivalent thereof then is passed through an opening in a lug 2| at one side of the recess 19 and is secured in overlying relationship to the outer face of the shaft head 18. The shaft l5 thus is secured against accidental displacement from the housing A and also against rotation, due to the cooperation between its polygonal head 18 and the walls at the sides of the recess 19. Y

The drum I6 is designed to have wound thereon a chain or other suitable flexible pullingor power transmission element 22, which is under.

spiral guide rib 23. The upper end of the flexible element may be secured to the drum IE or may be fastened to a lug or other suitable formation 24 on the spur gear H as shown. For rotating the spur gear thereby to rotate the drum |6 to wind the flexible element 22 thereon, there is provided a pinion 25 which is in mesh with the spur gear I1 and which is carried by a shaft 26 journaled in front and rear bearings 21 and 28 mounted in bearing accommodating openings 29 and 36, respectively, in top portions of the front and the rear walls I and II, respectively, of the housing A.

The pinion 25 preferably, but not necessarily, is integral with the shaft 26 and in any event is rigid with said shaft, and preferably is provided with shrouds 3| extending preferably the full depth of the teeth thereof, whereby its teeth are strengthened and whereby, due to said shrouds overlying the ends of the teeth of the spur gear l7, its disengagement from said spur gear by endwise movement of the shaft 26 is prevented so long as the spur gear I! is operatively mounted in the housing A. It follows, therefore, that in order to assemble the unit the shaft 26 must be placed in the housing prior to mounting the spur gear I! and the drum |6 therein, and that in order to disassemble the unit the spur gear l7 and the drum l6 must be removed prior to removal of the shaft 26.

The rear bearing 28, preferably in the form of a bronze bushing, is removably, replaceably mounted in the opening 30 in the rear wall ll of the housing A and has journaled therein the rear end portion of the shaft 26 which extends rear- Wardly beyond the pinion 25. Either said bearing, or the portion of the shaft 26 which is journaled therein, or both said bearing and said shaft portion, preferably is or are, provided with one or more lubricant containing and distributing grooves or channels 32 which preferably opens, or open, through the rear end of said bearing or said shaft, or through the rear ends of both said bushing and said shaft, as the case may be, into a lubricant containing pocket 33 formed as part of the housing wall Accordingly, by packing the pocket 33 with a suitable grease or other lubricant when the unit is assembled, the bearing 28 and the portion of the shaft 26 which is journaled therein are assured of an ample supply of lubricant over a long period of time without manual attention.

As in the case of the rear bearing 28, the front bearing 21 for the shaft 26 also preferably is in the form of a bronze bushing, preferably of onepiece construction, and is removably, replaceably mounted in the opening 29 in the front wall H] of the housing A, being retained securely and posively within said opening by a bolt 34 extending transversely through the top portion of said housing and through a transverse groove 35 in the top portion of said bearing. Inwardly of the bearing 2'! the shaft 26 is provided with a flange 36 which cooperates with the inner side of said bearing to prevent outward movement of said shaft as long as said bearing 27 is held operatively mounted within the opening 29. However, when the bearing 21 is removed, as permitted by first removing the bolt 34, and assuming previous removal of the spur gear I1, the shaft 25 with its pinion 25 is readily removable through the opening 29 due to said opening being, as shown, of greater'diameter than the pinion 25. Conversely, in assembling the unit, the bearing 2'! is inserted over the shaft 26 into the opening 29 after the inner end portion of said shaft and the pinion 25 have been passed through said opening 29 as will, of course, be understood.

Either the bearing 21, or the portion of the shaft 26 which is journaled therein, or both said bearing and said shaft portion, is, or are, provided with one or more grooves or channels 3! closed at its, or their, ends and disposed within the planes of the ends of the bearing, to be packed with lubricant when the unit is assembled, to assure a lasting supply of lubricant for said bearing 21 and the said portion of the shaft 26 which is journaled therein.

Outward of its portion which is journaled in the bearing 27, the shaft 26 is tapered or otherwise suitably formed, as indicated at 26', to have removably' mounted thereon a hand wheel 38, a nut 39 being threaded on the outer end portion of said shaft against the hub of said hand wheel, or any other suitable means being provided, to fasten said hand wheel on said shaft.

As is customary in devices of this general character means are H against accidental retrograde movement, the means shown comprising a pawl 40 located in the housing A for cooperation with the spur gear said pawl being non-rotatably mounted on a shaft 4| journaled in openings 42 and 43 in the front and the rear walls of the housing A. The shaft 4| is provided with a key 44 which, upon assembling said shaft with the pawl 40, slides through a keyway 45 in the front housing wall ||l opening into the front bearing opening 42 and enters a keyway 46 in the pawl 40.

The forward end of the shaft 4| is equipped with a head 4! located outside of the housing and shaped as shown to present stop portions 48 and 49. A weight 59 is journaled on the shaft 4| between the front face of the housing and the head 4'! and is provided with a projection presenting oppositely facing shoulders 52 and 53 which cooperate with the shoulders 48 and 49, respectively. When the weight 59 is in the position shown in Figs. 4 and 8, the pawl 46 is urged by the weight into engagement with the teeth of the gear l1. On the other hand, when said weight is thrown to the position shown by dotted lines in Fig. 9 it moves the pawl 40' out of engagement with the teeth of the spur gear l1, thereby to release the latter.

The positions of the keyways 45 and 46 relative to the front bearing opening 42 and the pawl 40, respectively, are such that the pawl cannot be rotated to a position to aline its keyway with the keyway 45 as long as the spur gear I? is operatively disposed within the housing A. Therefore, the pawl 4|) must be mounted on its shaft 4| prior to mounting the spur gear H in the housing A, which means, of course, that when said spur gear subsequently is mounted in said housing, the pawl shaft cannot be rotated to a position to aline its key with the keyway 45 and that said'pawl shaft therefore cannot be removed from its bearing openings without first removing the spur gear H.

A pocket 54 similar to the pocket 33 may be, and preferably is, provided to supply lubricant to the bearing for the inner end of the pawl shaft 4|.

In accordance with the present invention provision is made for substitution of an operating element in the form of a lever and a pawl and ratchet mechanism in lieu of the hand Wheel 38, so that either the hand wheel or said lever and pawl and ratchet mechanism may be used provided to hold the spur gear,

' may be,-of the same according to preference or desirability in any particular case. I

" The lever and pawland ratchet mechanism T tapered or otherwise formed to have a hand wheel coaction'with said the ratchet teethr56 by one or more bolts or ,tosaid casing as mounted thereon, is integrally or otherwise, rigidly'provided with ratchet teeth 56,

,A combined pawl and lever mechanism for cooperation with the ratchet "teeth 56 to rotate the shaft formed integrally therewith apawl 60 for direct ratchet teeth. The casing 51 comprises a hood section 6| and a plate section 62-secured together in enclosing relationship to rivets 63, the pivotal support for the lever 58 beingcomprised by alined bosses 6|, 62' on said hood" and plate sections, respectively, through which bosses one of the bolts or rivets 63 preferably extends.

64 of a shape preferably corshaft 55 to a position at the inner side of the ratchet teeth 56 prior to assembly of the sections 6|, 62. Moreover, saidplate secvtion 62 is suitably recessed to accommodate a, 'two part bushing 65 to provide a bearing for the lever 58 on the shaft 55 at the inner side ofthe ratchet teeth 56, the bushing halves pref- ,erably'having formations to fit the opening 64 62 whereby the bushing .isheld against rotation relative to said plate section. The plate section I over the shaft 55, the bushing 65 then is assembled around the shaft and engaged with the 62 first is engaged plate section 62, and, finally the hood section 6!, which is provided with a bearing opening,

66 to accommodate the outer end portion of the shaft 55, is assembled with the plate section 62,

being fastened thereto by the bolts or rivets 63.

The lever 58 extends through'an opening 61 in the side of the hood section 6| and said opening I is of sufiicient length to permit said lever to be swung on I mygage the pawl 60 with 'and from the ratchet "t'eeth'56.

its 'pivot 59 to engage and disen- [The end wall of the hood section 6| prefer- "ably is provided with a grease pocket opens into the bearing opening 66 and 68 which also into afgrease passageway 69 in the shaft 55, which passagewayhas branches 10 leading to the jourfnal opening in the bushing 65;

' is packed with grease when the mechanism is assembled to assure a lasting supply of lubricant the features and advantages for the journal connections between the shaft 55 andthe casing 51. 7 Without further description it is thought that of the invention will be readily apparent to those skilled in the art, and it will of course be understood that changes in the form, proportion and minor. details of constructionmay be resorted to,;without, departing from the spirit ofthe invention and 1 ;scope of the appended claims.

a scribed comprising 9 "front and rear walls and adapted to be fastened 1. A power applying unit of the character dea support having spaced apart 55 comprises a casing 51 rotatably mounted on the shaft 55 and a lever 58 pivoted indicated at 59 and having The plate section 62 is formed The pocket 68 I drum, a flexible pulling element to be wound onto said drum by rotation thereof, a head formation on the outer end of said shaft having a fiat side surface, a fiat surface on the front wall of the support for cooperation with the flat side surface of said head to hold said shaft against rotation, and a securing element removably engaged with a portion of said front wall and overlying the outer end of the head formation of said shaft to hold the latter against removal from the openings in said front and rear walls. 7

2. In a power applying unit of the character described, a support having spaced front and rear walls, a drum and gear unit removably mounted between said walls, a bearing carried by'said rearrwall and a bearing accommodating opening in said front wall, a bearing removably mounted in said opening, a power shaft extending between said walls and journaled in said bearings, a pinion of larger diameter than said power shaft rigid with the latter and in mesh with said gear, said opening being of a diameter to permit removal of said power shaft and pinion therethrough as a unit when said removable bearing is removed, said removable bearing being in theform of a one-piece bushing having a groove in its outer rounded side, and a bolt extending through portions of said outer wall tangentially with respect to said removable bearing and engaged in the groove of the latter to hold said 7 bearing removably engaged in said opening.

'3. In a power applying unit of the character described, a support having spaced front and rear walls, a drum shaft extending between and removably mounted in said walls, a drum and gear" unit rotatably mounted on said shaft be- [tween said walls and journaled in said bearings, I a pinion rigid with said power shaft and in mesh with said gear, said removable bearing having a peripheral groove, a bolt extending through portions of said front wall and engaged in said groove and serving to removably retain said removable'bearing in said opening, said pinion being of larger diameter than said shaft, said opening being of a diameter to permit removal of said power shaft and pinion therethrough as a unit upon removal of said removable bearing, and cooperating means between on said gear and pinion holding said pinion and power shaft against removal as long as said drum and gear unit is operatively disposed between said walls with said gear in mesh with said pinion, said cooperating means being released by removal of said drum and gear unit to permit free removal of said power shaft and pinion unit upon removal of said removable bearing.

AUGUSTUS F. meme.

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