US1648546A

US1648546A - Concrete mixer

Info

Publication number: US1648546A
Application number: US155170A
Authority: US
Inventors: Gilson Michael
Original assignee: KWIK MIX Co
Current assignee: KWIK MIX Co; KWIK-MIX Co
Priority date: 1926-12-16
Filing date: 1926-12-16
Publication date: 1927-11-08
Anticipated expiration: 1944-11-08

Description

Nov. 8, 1927. 1,648,546

M. GILSON CONCRETE MIXER Filed Dec.- 16, 1926 2 Sheets-Sheet l Nov. 8, 1927. 1,648,546 M. GILSON CONCRETE MIXER Filed Dec: 16,. 1926 2 Sheets-Sheet 2 Patented Nov. 8, 1927.

MICHAEL GILSOIN, OF PORT 'WASIIINGTON,

PATENT QFFICE.

PANY, OF PGRT W'ASHINGTON, WISCONSIN.

ooivonnrn MIXER.

Application filed December This invention relates to a concrete mixer.

In concrete mixers as heretofore constructed, it is the usual practice to provide means for dumping the mixing drum or rocking back to filling position which are provided with gear teeth, and toprovide a latch-like member for locking the gear teeth to thus hold the drum in either of its two positions. However, it has been found that these devices frequently break the gear teeth and are not wholly satisfactory.

This invention is designed to overcome the defect noted above, and objects of such invention are to provide a novel form of lock for the tilting means which does not place any strain upon the teeth, and which does not engage the teeth, but instead which frictionally locks one of the rotary members to thus hold the drum in the desired position.

Further objects are to provide a simple and novel type of locking means which'may be instantly operated, which is strong and of rugged construction, and not likely to get out of order, and which may be applied to existing types of mixers. A further ob ect of this invention is to provide a novel form of stop for the mixer, so that the mixer will be arrested in its rocking motion at the desired points, and to so construct the stop that it may be adjusted, as required.

An embodiment of the invention is shown in the accompanying drawings in which Figure 1 is a fragmentary side elevation of the concrete mixer; Figure 2 is a sectional view adjacent one of the trunnions of the rocking or tilting frame.

Referring to the drawings, it will be seen that the mixing drum is indicated by the reference character 1, and is carried by the rocking yoke 2. This rocking yoke is provided with trunnions 3 which are carried in frames 4. One of the trunnions is rigidly joined by means of a spider to an internal gear wheel 5. This internal gear wheel meshes with asmall pinion 6 carried by a hand wheel shaft7. The shaft 7 is carried in a bearing 8 formed integrally with a bracket 9 bolted to the frame 4. The hand wheel shaft 7 carries a manipulating hand wheel 10 and is also provided with a friction drum 11, such drum being provided with an annular groove, as indicated in Fig ure 2. A U=shaped metal strap member, preferably of circular cross section is seated 16, 1926. Serial No, 155,170.

within the groove, as shown in the drawings and indicated by the reference character 12. The ends of the U-shaped member pass through laterally extended portions of the bracket 9, as most clearly shown in Figure 1. These terminal portions are threaded, as indicated at 18 and 14; in Figure 1. The portion 13 is clamped to the bracket 9 in an adjustable manner by means of nuts 15. The portion 14: extends through an aperture in the bracket on. the other side. and passes through the hub 16 provided with a lever 17. The hub 16 and the adjacent portion of the bracket are provided with cooperating cam faces 19. Shoulders 20 (see Fig. 2) are pro- \VlClGd on the bracket and hub for limiting the unlocking motion of the lever 17. All that is necessary is to swing the lockinglever to cause co-action of the cam faces 19. This t ghtens the clamping strips 12 and frictionally locks the mixing drum in position.

It will be seen, therefore, that the utmost ease of locking the drum is secured by this invention and also that there is no danger of stripping or breaking off a tooth of the gear wheel of the mixing drum, as frequently happens with prior structure, for with applicants device, nothing drops in between the teeth of this gear and, consequently, the breaking is eliminated.

It is to be noted further by referring to the drawings, that means are provided for arresting the motion of the mixing drum in any desired position. This means is also adjustable, as will appear. From Figure 2, it will be seen that a disc-like member 21 is rigidly attached to the gear 5. A second disc 22 is loosely carried by the bolt 23 which extends through the trunnion 3 of the mixing drum and locks the parts together. The

members

21 and 22 are provided with interlocking teeth 24: formed in the manner of serrations or roughened portions, as shown in Figure 2. A nut 22 is screwed upon a bolt 23 and thus locks the

discs

21 and 22 together. The disc 22 is, therefore, adjustable. with respect to the gear wheel, and it is to be noted from the drawings, that such disc carries a stop arm 25 as an integral portion thereof. This stop arm 25 may be webbed, as indicated in Figure 1, if desired. It is adapted to contact with the bearing 8 and thus arrest the motion of the mixing dra n when it is tilted. I l

is se that the Wisconsin, ssrenon To KWrK-Mrx COM- exact angle at which the mixing drum'will stop may be varied, as needed.

It Wlll be seen that an extremely simple type of stop and of locking means has been provided which does not tend to break any teeth in the gear train for tilting the drum,

and which also provides an adjustable stop,

method of locking the machine" by a latch in engagement with the gear teeth, it will be noted that the machine must be brought to a. dead stop before a lock can be effected, and this obviously results in loss of time. It is the primary object of my presentinvention to avoid such loss of time by utilizing a friction brake mechanism, as described, whereby the m xer drum can be brought to a dead stop while the machine is in motion in either direction.

1. A tilting device comprising a tilting member, a frame for supporting said tilting member, said member having trunnions extending through said frame, a gear car ried-by one of said trunnions, a pinion meshing with said gear, a jack shaft for operat- 'ing said pinion, a friction drum carried by said jack shaft, and friction means for locking said friction drum in any desired position, whereby the tilting member will beheld locked in position.

2. A tilting device comprising a tilting supporting means, a gear rigidly attached to said means, a pinion meshing with said gear, a: hand wheel fixed rigid with said pinion and provided with a grooved friction drum, a friction strap passing around said' friction drum and positioned within said groove, and means for tensioning said friction strap. V

3. A tilting device comprising tilting means having projecting trunnions, a frame pivotally carrying said trunnions, a gear wheel rigid with one of said trunnions, a

pinion meshing with saidgear wheel andv provided with a shaft, a bearing supported rom said frame and carrying said shaft, means for rotating said shaft, a friction drum carried by said shaft and located adjacent said bearing, a U-shaped metalstrap surrounding said friction drum and having one end secured to a stationary portion of p the machine and its other end slidably passing through. a stationary portion of'the ma;

chine, and cam means for tightening said last mentioned end of the strap.

4:. A tilting member having projecting trunnions, a frame pivotally supporting said trunnions, a gear wheel rigid with one of said trunnions, means for operating said gear wheel to tilt said member,a disc carried bysaidgear wheel, a second disc adapted to be clamped to said first mentioned disc and provided with a projecting arm, and a stop against which said arm is adapted to contact. Y

5; A tilting yoke provided with projecting trunnio'ns, a frame carrying said trun'nions,

a gear wheel rigid with one of said trunnions, a pinion 'meshing with said gear wheel, said gear wheel having a disc, rigid therewith, a second disc mounted adjacent said first mentioned disc, said discs having cooperating roughene'dgfaces, means for clamping said discs together, an arm carried by" said second disc, and a stop against which said arm is adapted to contact.

6. A tilting yoke provided with projecting trunnions, a frame carrying said trunnions, a gear wheel rigid with one of said trun nions, a pinion meshing with said gear wheel, said gear wheel having a disc rigid therewith, a second disc mounted adjacent said first mentioned disc, said discs having cooperating roughened faces, means for clamping said discs together, an arm carried by said second disc, and a stop against which said arm is adapted to contact, means for rotating said pinion includinga jack shaft, friction drum carried by said jack shaft, a friction band engaging said friction drum, and means for tensioning said friction band.

7 A tilting member, means for pivotally supporting said member including trunnions,

a friction drum o-peratively connected to said trunnions, a friction band encircling said friction drum, and means for tensioning said band to lock said friction drum, whereby said member may be locked against tilting.

8. A. tilting device comprising a tilting 'pivotall'y supported member, a gear opera tively associated with said member, a jack shaft having a pinion meshing with said gear, means for rotating said jack shaft to tilt said member,- and cam controlled fricti'on means for restrainingsaid jack shaft against rotation, whereby said member may be frictiona lly held in tilted position.

; In testi'monyth at I claim the foregoing I have hereunto set my hand at Port Tashington, in the county of Wisconsin. I

MICHAEL. eiLsoa.

of Ozaukee, and State