US1821536A - Loader - Google Patents

Description

H. H. BARBER Sept. 1, 1931.

LOADER Se t. 1, 19311.

H. H. BARBER LOADER Filed Nov.

1927 4 Sheets-Sheet 2 fi arg Sept. 1, 1931. V H. H. BARBER 1,321,536

LOADER Filed'Nov. 11, 1927 4 Sheets-Sheet 3 45757 7752 ya'zgff 5012561.

H. H. BARBER Sept 1, 1931.

LOADER Filed Nov 11. 1927 4 Sheets-Sheet 4 l atented ept. 1,

UNITED .STATES PATENT OFFICE" HARRY H. BARBER, F AURORA, ILLINOIS, ASSIGNOR T0 BARBER-GREENE COMPANY,

A CORPORATION OF ILLINOIS LOADER Application filed November 11, 1927, Serial No. 232,564.

This invention relates to a loader and concerns itself primarily with means for mounting the conveyor boom thereof and controlling the same. The invention contemplates a loader which is relatively short and mobile so that the same can be used on narrow streets and places of small area and in wh1ch the boom may be elevated to a horizontal position in a relatively low plane so that the m same may pass under viaducts, bridges, or

r the like.

The invention comprises the novel structure and,combination of parts hereinafter described and more particularly pointed out and defined in the appended claims.

In the accompanyingdrawings which 1llustrate a preferred embodiment of this lnvention and in which similar reference numerals refer to similar features in the different views:

Figure 1 is a side elevational View of a loader embodying this invention, illustrating the conveyor boom in its operative posltion.

Figure 2 is another side elevational view of the loader, illustrating the boom in its elevated horizontal position.

Figure 3 is a rear elevational loader.

iew of the 45 control. p

Figure 4: is a fragmentary part sectional movement of the radius arms 9 and limit the The loader illustrated is of the type shown in the Barber Patent N 0. 1,630,598 to which reference may be had for a complete understanding of the machine. The present structure, however, differs from the structure shown in the patent and this difference resides primarily in dispensing with the rollers and the track and supporting the'boom upon a pair of pivoted arms. 1

In referring to the drawings, it will be noted that the loader embodies a crawler 1 of any improved type upon which a power unit 2 is mounted. This power unit is preferably in the form of an internal combrstion engine or the like, which. both operates the crawler and the conveyor as will later more fully appear. A suitable frame consisting of uprights 3, diagonal braces 4 and horizontal braces 5 is constructed upon the crawler for supporting the boom 6 which 65 may be of any standard construction. The side members of the boom are provided with supports or plates 7 to which radius arms 9 are pivoted by means of a transverse shaft 10. The lower end of the two radius arms 9 are pivotally secured upon suitable bearfngs upon the power shaft 11 which is connected by sprocket gearing 12 to the engine shaft. Between the rear uprights 3 and the diagonal struts 4 there is a supporting brace member 13. A small angle .bar 14 is secured upon each side of the frame to the forward upright 3 and the bracing plate 13. This angle bar l l'is provided with substantial upright terminals 15 from which lateral stop members 16 extend in an outward direction as shownmore clearly in F igure 4. These stops 16 lie in the path of movement therebetween.

Upon each forward upright 3 there is a plate member 17 and between theseplate ,members there extends a shaft 18 which is shown more clearly in Figure 5 and this shaft 18 supports a pair of rollers 19 which lie in the plane of the side angles 20 of the boom. It w1ll be noted that these rollers are situated just behind the plates 7 which act as a guide therefor. With reference to Figure 5, it will be noted that in its operative position the boom is not supported upon the rollers 19. The purpose of these rollers is to assist in tilting the conveyor boom as will be later more clearly shown.

Between the frame of the conveyor and the front end of the boom are a pair of thrust arms 21. The ends of each thrust arm are respectively pivoted to the frame and to the front end of the boom. The function of these thrust arms is to keep the nose of the boom at its work and to allow the same to elevate if an obstruction is encountered.

Each thrust arm is in sectional form. One section of the channel bar 22 which is pivotally connected at its outer end to the boom and the second channel section 23 which is pivotally connected to the crawler frame as indicated at 24. Each channel section is provided with a series of apertures 25 and two channel members are in opposed relation as shown in Figure 7. Between the channel members there is a solid bar 26 which is provided with a suitable slot 27. The two opposed channel sections are connected together by bolts 28 which may be inserted through any of the apertures 25. Each thrust arm is accordingly both adjustable and extensible for a purpose which will later more fully appear.

The boom is adapted to be elevated from the ground and tilted to its horizontal position by means of a cable 29 which is attached to the boom at a point 30 above the radius arms. The cable then passes around a pulley 31 which is mounted upon the crawler frame and then around a pulley 32 which is suitably supported on the boom, In the present instance the sheave of the ulley 32 is shown as connected to the plate From the pulley-32 the cable 29 returns to a drum 33 mounted on a shaft 33a which may be operated by means of a hand wheel 34 which may be geared to the drum 33 in any well known manner. In referring to Figure 3 it will be noted that the shaft 33a extends to the opposite side of the machine and that the cable control is duplicated upon such opposite side.

In Figure 8 there isshown a sli ht modification of the control mechanism. his modification consists in connecting the pulley 32 to the radius arms 9 instead of to the boom.

The conveyor embodies an endless bucket conveyor 35 which is driven from the power unit on the crawler and the driving relation is such that it will not be affected by any change in the posltion of the boom. To this end it will be noted that there is a driving sprocket 36 concentric with the lower pivot of the arms 9. A sprocket chain 37 is trained over the sprocket wheel. One reach of this sprocket chain passes over an idler pulley sproc et 39 and is trained over another sprocket wheel 40 on the boom in spaced relation with the sprocket wheel 38 and just above the same.

The operation of the machine is as follows:

Assuming that the parts are in the position shown in Flgure 1 and it is desired to elevate the boom to horizontal position, the operator will remove one of the bolts 26 in the thrust bars 21 whereby the same can be extended during the elevation of the boom. The operator will then turn the hand wheel 34 in the proper direction for exerting a pull upon the. pulley 32. The first movement thereof will raise the boom from its position on the ground and will bring it into contact with the roller 19 which will act as a sort of fulcrum.

The boom will be elevated until the arms 9" come in contact with the rear stops 16. During this movement the boom will be supported by the arms 9 which will swing upon their pivots 11. The boom will receive some tilting movement while it is being moved rearwardly against the rear stops 16. When such rear stop is reached, the continued operation of the drum on the shafts 33a will cause the cables 29 to tilt the boom to horizontal osition as shown in Figure 2, in which posltion the boom is sufficiently low to pass under viaducts, bridges, or the like.

It will be appreciated that the present loadext} is a simple and cheap construction which may be used especially where a light loader is desired.

I am aware that many changes may be made, and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not propose limiting the. patent granted hereon, otherwise than necessitated by the prior art.

I claim as my invention:

1. In a loader, a vehicle embodying a frame, a pair of radius rods pivoted at their lower ends to said frame, stop means for limiting the swinging movements of said rods, a boom pivotally connected adjacent its medial portion to the upper ends of said rods, and a pair of telescopic thrust bars connecting said frame and boom and extensible upon elevation of said boom.

2. In a loader, a crawler including a frame,-

a pair of radius. rods pivoted at their lower ends to said frame, a tiltable boom pivoted adjacent its medial portion to said rods and solely supported thereby when in horizontal position, stop means for limiting the swingmg movements of said rods and a fulcrum roller upon said frame over which said boom may tilt.

3. In a loader including a crawler having a frame, a tiltable boom, a pair of radius rods pivotally connected to the medial portion of said boom, and to the lower portion of said frame for solely supporting said boom in horizontal position, a fulcrum roller upon said frame over which said boom may tilt and,

extensible thrust bars connecting said frame and the forward part of said boom.

In testimony w ereof I have hereunto subscribed my name.

" HARRY H. BARBER.

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