US1936660A - Hoisting bucket - Google Patents

Description

E. E. BROSIUS HoIsTING BUCKET Y Nov. 28, 1933.

Filed May 28, 1931 5 Sheets-Sheet l E. E. BROSIUS HOISTING BUCKET Nov. 28, 1933.

Filed May 28, 1931 5 ShetS-Sheet 2 NOV. 28, E' E BROSlUS HOISTING BUCKET Filed May 28, 1931 5 Sheets-Sheet 5 K9 66 1 f f f /7/ 'V67II W70 72 M 6 6 /0 RTW INVENTORl 5 I fr, @0%444/ Nov. 28, 1933.

E. E. BRoslus ,n 1,936,660

HOISTING BUCKET Filed May 28, 1931 5 Sheets-Sheet 4 640 55 J ,d J0 3/ .5( i@ 3/ I' ,'1- l-I I l l /VI ifo O dl@ OI /12-5 u l; -Im I' 3/ i@ 23/ (d2 [im @D K @D J5 32 j 5.5

O fig@ E. E. BROSIUS HOISTING BUCKET Nov. 28, 1933.

Filed May 28, 1951 5 Sheets-Sheet 5 INVENTOR Patented Nov, 28, 1933 UNITED STATES PATENT oFF1cE Hols'rING BUCKET Edgar E. Brosius, Pittsburgh, Pa.. Application May 2s, 1931. serial No. 540,617 9 claims. (C1. 371s4) This invention relates generally to material handling apparatus and more particularly to an improved hoisting bucket and latching mechanism for engaging and disengaging a movable cross head with a lifting bar to which the sections of the bucket are connected. i

It has heretofore been customary in the artto which the present invention relates to construct hoisting buckets of the general type herein contemplated by utilizing a plurality of specially constructed shapes, and fabricating them under such conditions that the completed bucket is not only unnecessarily heavy, but also comparatively expensive. The present invention has for one of its objects the provision of a bucket which as to all of its principal parts is constructed either of standard structural or plate members Welded one to the other to form the completed bucket. In this manner the cost and expense as well as the weight of the completed bucket are all materially reduced.

In the accompanying drawings which illustrate two embodiments of my invention;

Figure 1 is a side elevation of a bucket with the bucket sections in open position;

Figure 2 is a similar view showing the bucket sections closed; I

Figure 3 is an end elevation with the bucket sections closed;

Figure 4 is an enlarged horizontal section taken on the line IV-IV of Figure l, certain parts being omitted for clearness;

Figures 5, 6 and 7 are respectively-a plan, a side elevation, and an end elevation of the movable cross head;

Figures 8 and 9 are respectively a plan and a side elevation of the guide lever; f

Figures 10 and 11 are respectively a plan and a side elevation of the trip lever;

Figures 12 and 13 are respectively a plan and a side elevation of the latch;

Figure 14 is a partial side elevation similar to Figures 1 and 2 but showing a modied cushioning means for the cross head; and

Figure 15 is a perspective view of a bucket constructed in accordance with the present invention.

Referring more particularly to the accompanying drawings, the bucket comprises sections 2 and 3 pivoted at their upper edges, as shown in Figure 1, to supporting shafts 4 and 5 respectively. The bucket section 2 has arms welded thereto at its sides, each of the arms 6 being provided with hubs 7 and bushings 11 rotatably mounted on a lifting rod or shaft 8, which also constitutes the pivotal connection between the bucket sections.

The section 3 has arms- 10 welded thereto at their outer ends, the inner ends being offset inwardly, as shown in Figure 4, and having openings for the lifting rod 8. The arms 10 are connected by a channel 12 having upwardly extending flanges 13. An angle 14 is secured to the channel 12 Vadjacent each of the arms 10, their vertical flanges 15, as viewed in Figure 1, being cut away vto provide an outwardly extending stop 16. In the position shown in Figure 4, each of the stops 16 rests upon cooperating plates 17 secured to the inner sides of the arms 6, the engagement of these parts limiting the opening movement of the bucket sections.

The shaft 5 to which the section 3 is pivoted, is carried by upwardly extending links 20 braced by a channel 21. The upper ends of the links 20 are constructed to provide forks 22, as shown in Figure 3, adapted to receive sheaves 23. The cross shaft 4 to which the bucket section 2 is connected is pivotally secured in the lower ends of links 24 pivoted at their upper ends to a transverse shaft 25 supported by brackets 26 secured to the forks 22. l

A cross head, indicated generally by the reference numeral 28, is movable from the full line to the dot and dash line position indicated in Figure 1. The cross head is illustrated in detail in Figures 5, 6 and 7 and comprises spaced plates 29 and 30 Welded at their end and intermediate portions to spacers 31. The plates are also braced by a bar 32 shown in Figures 6 and 7. Welded to the outer surfaces of the plates 29 and are horizontally extending bosses 33 which provide bearings forvsheaves disposed between the spaced plates 29 and 30. Also welded to the -outer surfaces of the plates 29 and 30 are four vertically extending tubular housings 35 which receive bumper pins 36. These bumper pins or bolts extend through the housings 35, and a spring 37 is coiled around each of the bolts 'and presses against the bottom of a housing and against a bolt head 38. The bosses 33 are provided with openings 40 for the ends of U-shaped guards 41. Plates 42 extend crosswise betweenl the plates 29 and 30 acting to space the latter, the plates 42 extending below the side plates at their lower ends to provide ears 43 having openings 44 which receive a pin 45, and abutting at their upper ends against the intermediate spacers 31. The bar 32 extends diagonally between the plates 42 at their intermediate portions and stiffens the same. 110

A guide lever indicated generally by the reference numeral 48 is pivoted at its upper end to the pin 45 and at its lower end to the shaft 5, the details of the guide lever being shown in Figures 8 and 9. The guide lever is formed of two side plates 49 and 50 spaced apart and welded to plates 51 and 52. Bosses 53 are welded to the left hand ends of the plates 49 and 50, and are braced by gussets 54. A trip lever 55 is received 'within the space between the side platesl49 and 50 and is pivoted to the guide lever on a pin 55a which extends through an opening 56 in the end of the trip lever and through corresponding openings 57t in the guide lever. As shown in Figure 10, the trip lever is formed with a hub portion 58 comprising spaced sides and is provided below the opening 56 with an arcuate slot 59 which receives a roller 60. The hub portion 58 is cut away on the line 61 in order thatl the latch which is about to be described may contact with the roller received inthe slot 59;

In Figures 12 and 13 there is shown a latchindicated generally by the reference numeral 65 which. is received in the space between the side plates 49 and 50 or" the guide lever, the latch being pivoted on a pin 66 which extends through f an opening 67 in the hub portion 68 of the latch and through corresponding openings 69 in the sideplates 49 and 50. One end of the latch is provided with a notch 70 shaped toiembrace the lifting rod'8, the opposite end of the latch beingv provided with an offset 71 adapted to receive the roller 60, the offset'71 being provided with a hardened tip 72; The left hand end 73 of the latch, asviewe'd inFigures l2 and 131, is adapted to fit between the spaced sides 74 of the trip lever so that theroller 60 can be received in the offset 71.

Thebucket' is suspended from a crane hook 80 byj ahook block- 81 to whichY is secured one end of eachof two cables 82. Each of the cables 82 passes downwardly from the hook block and around a sheave 83 inthe cross head, and then' passes upwardly around one of the sheaves 23, and: then downwardly' and is dead-ended to the inrierend- 841of abracket 85 secured to the bucket section 3. These brackets, as apparent fromFigure 3, are preferably so positioned as tov provide intermediatebearings fortheshaft 5, thus adding to the rigidity of the structure. A trip rope. 86- is secured, as indicated by the reference numeral 87, to one end ofthe trip lever 55, the rope passing over a= pulley 88 suspended'froin a bracket89 secured, to the channel 21. l In the operation of the bucket, the bucket seotions are lowered until they assume .the positions indicated in Figurey 1. As the cross head is low-` ered, the pin 45 which connects the guide lever andcross head describes the arc indicated by the reference letter A. The downward movement' of I the guide lever 48 carries with it the Vlatch 65 and: thetrip lever 55. When the cross head reaches the position indicated in full lines in Figure 1, the lifting rod 8 is received in the notch 70'and the latch 65 is held in a position to maintain. engagement between the latch and lifting rod, by the roller 60 which is received in the offset 71. The cables 82 are then raised until the parts assume the position indicated in Figure 2, the engagement between the latch 65 and the lifting rod 8, causing the bucket sections 2 and 3 to swing upwardly about shafts 4 and 5.

As the cross head is raised it comes into contact with' the plates 22 and any further lifting of the cable acts to raise the bucket, the springs 37 cushioning the lifting contact between the cross head and frame. When it is desired to dump the bucket, the trip rope 86 is pulled, thereby swinging the trip lever about its pivotal mounting 55a and moving the roller 60 out of engagement with the latch, thus allowing the latch to swingy to the position indicated in dot and dash lines in Figure l. The lifting rod 8 is thereby released from the notch 70 and the bucket sections are free to swing'under the action of gravity, to their open positions, being limited by the stops 16.

To those skilled in the art it will be apparent that if the bucket sections are permitted to swing freely during their opening movement, the engagement of the stops 16 with the cooperating plates 17 would subject the entire bucket to severe.' and sudden shocks and strains. In order to preclude such a condition and to insure a gradual opening of the bucket sections, the reaving of the hoisting cables and their connections as before described are such as to cause the bucket to climbV upwardly during the opening movement, the-upward movement tending to counteract to the desired extent, the opening movement of the bucket sections, thus relieving all of the parts froms objectionable shocks of the character re-v ferred to.

In Figure 14 there is shown a modified cushioning means for cushioning the contact between the cross head and the frame as the cross head isv raised. In this figure parts corresponding to those` used in other figures are indicated by the same reference numerals with the letter a suflixed. As shown in this figure, leaf springs 90 pagovided with a spring clip 91 are suspended fromv pins 92 secured to the plates 22. The cross head is formed with a shoulder 93 which contacts withthe spring clip as the cross head is raised, there by cushioning the jar which would result if no cushioning Ymeans were interposed between the cross head and frame.V

In the foregoing description reference has already been rnade to the' welding of certain of the parts. By reference to Figure 15 of the drawings, however,l the complete structure with respect to its component parts, andthe manner of assembling the will be more readily understood. From this gure it clearly appears that the bucket section 2`comprises two side members 95 in the form of ordinary steel plates cut to the desired shape. Intermediate these side plates is a bottom plate 96v andan end plate 97, all of the plates being welded one to the other as indicated in the draw-- ings. For further strengthening the parts and eliminating a condition in which all of the welds would be entirely in shear, a tie strap 98 is bent into substantially U shape and positioned to embrace the side plates 96 andthe end plate 97, the

tie strap being welded in position.

In like manner, a second tie strap 99 is sestiifened by the transversely extending channelV 12 which is a structural member readilywelded into position.

The links which extend upwardly from the bucket sections may be formed of suitable bar or plate material, the forks 22 extending therebetween likewise comprising plates welded to the links as indicated. The cross head, the guide lever and the trip lever, as well as the latch, all comprise sections of plate, easily formed, and readily welded where required to complete the assembly. The shafts 4 and 5 are of standard construction and may be cut from lengths of standard rounds. The bosses 33 are cut from lengths of tubing, and the housings 35 are cut from lengths of pipe, the cut pieces being welded in position. lIhis type of structure obviates the necessity of maintaining in stock a plurality of special shapes and sections, and enables the parts to be fabricated in a machine shop at relatively small expense. It also enables bucketsof different sizes to be constructed from similar parts without the necessity of any special forming operations. The possibility of welding and of reinforcing the welded parts also facilitates the production of a strong and durable bucket.

I have illustrated and described a preferred embodiment of my invention. It is to be understood, however, that the invention may be otherwise embodied or practiced within the scope of the following claims.

I claim:

1. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and to a lifting rod, a cross head movable toward and away from the lifting rod, a guide lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, and a latching mechanism carried by the guide lever for engaging and disengaging the lifting rod.

2. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and to a lifting rod, a cross head movable toward and away from the lifting rod, a guide lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, a latching mechanism carried by the guide lever for engaging and disengaging the lifting rod, said latching mechanism comprising a latch pivoted to the guide lever and having a notch for receiving the lifting rod, and a trip lever pivoted to the guide lever.

3. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and to a lifting rod, a cross head movable toward and away from the lifting rod, a guide lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, a latching mechanism carried by the guide lever for engaging and disengaging the lifting rod, said latching mechanism comprising a latch pivoted to the guide lever and having a notch for receiving the lifting rod, a trip lever pivoted to the guide lever, and a roller received in an opening in the trip lever and adapted to contact with the latch.

4. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and to a lifting rod, a cross head movable toward and away from the lifting rod, a guide lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, a latching mechanism carried by the guide lever for engaging and disengaging the lifting rod, said latching mechanism comprising a latch pivoted intermediate its ends to the guide lever and provided adjacent one end with a notch for engaging the lifting rod and adjacent the other end with a groove, a trip lever, and a roller received in an opening in the trip lever, said roller being arranged to engage the groove in the latch to hold the latch in engagement with the lifting rod.

5. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and toa lifting rod, a cross head movable toward and away from the lifting rod, a guide lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, said guide lever providing a space between its sides for receiving a latching mechanism for engaging and disengaging the lifting rod, and a latching mechanism in said space pivoted to said guide lever.

6. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and Vto a lifting rod, a cross head movable toward and away from the lifting rod, a guide lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, said guide lever containing two spaced apart plates providing a space for receiving a latching mechanism for engaging and disengaging the lifting rod, and a latching mechanism in said space pivoted to the guide lever.

7. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and to a lifting rod, a cross head movable toward and away from the lifting rod, a guide lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, said guide lever containing two spaced apart plates providing a space for receiving a latching mechanism for engaging and disengaging the lifting rod, a latching mechanism in said space, said latching mechanism comprising a latch pivoted to the guide lever and having a notch for receiving the lifting rod, and a trip lever` pivoted to the guide lever.

8. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and to a lifting rod, a cross head movable toward and away from the lifting rod, a guide. lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, said guide lever containing two spaced apart plates providing a space for receiving a latching mechanism for engaging and disengaging the lifting rod, a latching mechanism vin said space, said latching mechanism comprising a latch and a trip lever, each received in said space and pivoted to the guide lever.

9. In a hoisting bucket, bucket sections pivotally connected to supporting shafts and to a lifting rod, a cross head movable toward and away from the lifting rod, a guide lever pivoted at one end to the cross head and at the other end to one of said supporting shafts, said guide lever containing two spaced apart plates providing a space for receiving a latching mechanism for engaging and disengaging the lifting rod, a latching mechanism in said space, said latching mechanism comprising a trip lever, and a latch pivoted intermediate its ends to the guide lever and provided adjacent one end with a notch for engaging the lifting rod and adjacent the other end with a groove, and a roller received in an opening in the trip lever, said roller being arranged to engage the groove in the latch, the latch, the trip lever and the roller being received in the space provided by the guide lever and pivoted thereto.

EDGAR E. BROSIUS.

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