DE1964222A1 - Concrete delivery mixer - Google Patents

Description

Karl A. Brose
Iföi / ^ _r ,; '';" ^: ". , Munich-Pullach, December 19, 1969

HEX OHAINBELT INGOBPORATED, Milwaukee (Wisconsin), USA

Concrete delivery mixer

The invention relates to a concrete delivery mixer (Truxmischer) Mixing drum rotatably mounted on a truck for mixing the concrete while driving from the concrete factory To the building site"

In a concrete delivery mixer of this type, the object on which the invention is based is to mount the mixing drum on the truck in such a way that the flow through the UL- 3oh-n would be! The shift in the center of gravity that occurs during the journey is reduced to the stability of the vehicle.

The two types of previous concrete delivery mixers differ - in the aiob. in the "ve sent en .larch the Ji; -. til long and storage of the ■ ir-: rj.b; -ron ^ i cable drum · DLb eino type ¹ - '"i-st alt one consistently ■ 5 / LLn .- ,: · .1 uni with internal rotary shaft horizon!, - «.! on deJi » ■: ■■?. ; t Ll ic.j Lorries, - ^ Ls ^ r th l.; i:> -. '. ntL \) üL: .i ^ l ■ "ersahen, -.vä v-tal ii; --aileve uni" ibli. ί, -ι.'ϊ i '/ pe der BL.iril.Lefermiöch-ir * -jLne ..Ii, »·. ■: ' -.VO-Hn il with g : ii jl, - t -.-. v., \ ^% ^ - icAiq · -. ; ^! ii υ-Λ ; fc, 2ί · ύ «yoniiij der j7> / r« t ^J 'iL: -jrii, .jcihrLffc 3 075 ^Ε · ^ ϋ / oiii 1 5 · "1» 1 ■) ■ - / ■' ■ »In L> -ifc ^ fcrtL ^ m b ills h-it; K * r · rick // artige ToLL l - ·; .iL.5ugtroiiuaol Luv ν he Lurks.:; ICoij-iLJt'.impfform, dio r, i -U ', ι .Ln -i ¹ / - · ί n ^: »L lui HiIi = IiILj !; kL ·;' iu rjtimöffnuni; rejuvenates, w. ·!; ii-. · .juvjohL .iuii ή,.; «t <huc-m.!. ■■. · t- 'i'i'onimel iuLfc len lietonboi» bau i ^r . -i 1. αϊ -iL .; η h; · ι, α _fli uiUrug; iii I; ■; fet ¹ «bij-j'-iii Be} ton; 3 mis der Troiuiii -..- !. lL- iuU bi .-. i 1 - ■ »ηιικΊαν _: ί1ΐπ <-1ι.-. ■■ ΐ - 31; obliquely upv / urta to hi.nl-, · π; -: ri.:;liL';l, ,;> d? ic LL ^ Tromm-il.iffriung au, Ίαη hL'irfiir bol: -imit, -iri h / uil.m , Λ>ύΐ; ü, iiht ₃

J.11 üLn i uiLt -m (Ιοί * ι r * r hu. · L i .nn; u in ·: b {i _l "-; _i ] th-; t * -n, 7 ■ -l-. !. h.'L ^ ii ~ Λ- · ϊ> ι if '-.- Lii: 5iim Li:> -Ί _mi;; α; · - jL.ii-i ^ Ί on-iii h.:.j ; ij; rs; 7 i ^r i »Γι * ii.-; u.", S. -n '· .- "ί; · -ί ίΊ.>" v) ^! )> i .'- ti:, . n »h '

(HJ ÜB '·: I ^J ! 5H

BATH ORIGINAL

The blades are designed like this? and arranged that b, ei the Rotation of the drums in the direction in which the concrete components mixed with each other, these simultaneously in turning » direction and to the front end of the. Drum can be moved

When lifting the concrete components in the direction of rotation they due to the centrifugal force to the side of the longitudinal axis of the drum and the longitudinal vehicle axis moves away, whereby the Center of gravity of the mass of the concrete components, laterally to the drum inner side is shifted towards and consequently also the pages— Stability of the vehicle is reduced in the same sighting *

The concrete contained in the drum is usually during the! trip of the truck to the construction site completely mixed up, and it is common practice to overcome when mixing the instability of the vehicle caused by the lateral displacement of the concrete components the advantages of the center curved roadway to be served by on a road with normal rounding towards the middle, i.e. with in the direction of travel road sloping slightly to the right, the rotation of the drum, seen from the rear, is made clockwise, whereby the concrete components, also seen from the rear, inside the drum to the left, i.e. opposite ju the direction., .. in which the truck is moving as a result of the ■ lane slope tends to huddle. ·

. . by :

However, it has often been shown that there are always movements of the vehicle or through. ILe Hbraßünbeschaffenhöib. the instability caused by the lateral displacement of the i'oton-ii-isn-e can be greatly / increased »;! o kuiin in the event of a sharp or screeching turn into a curve - due to the centrifugal force that occurs here > ^ tibliität d-; s vehicle. "zusäfcslinh" • / are erniiiidert and i at Uöikippen the vehicle führeru DIE from problem of InsbribiLL BÜB do ν known Batan;.. toht particularly -the vft; Lt; -jtbildung (loraelben, Λ%: τ

IjiiH-ntEr-ii * bvvu; _; , ijn and the

r αϊ müiie ^ iij boIif. in the wave «». ..

. '■ CH) ίή) 2 B / 1 2B

BATH ORIGINAL

The "% iatitat; of the concrete is due to further developments of the MisciLütiigsTechnik and the apparatus "improved", making it has become possible · the concrete with a lower water content and "to mix well with correspondingly higher strength." Due to its lower water content, such a concrete is naturally tougher, and it can with the improved mixers applies to be mixed, but "it clumps more densely on the inside of the mixer and is guided higher up in this. This has to do with the focus the concrete mass is shifted further to the side, thereby increasing the instability of the year-old witness will.

In addition, with the size and performance of the Trucks also the size of the concrete mixer and therefore the one to be mixed and loads to be transported has increased. Corresponding are also the ullage forces "when negotiating curves has become larger, also, the higher speeds of modern vehicles contribute to a further decrease their stability at

Of particular importance is the stability problem for concrete— delivery mixers, which are provided with a Las tv division tag are. The weight of the Concrete drums in large ML, the one for public streets permissible axle load -exceeds, distributed »One such Load distribution trailer is in the USÄ * patent 3 31? 193 of 2 * 5 * 67 and lifts over a hydraulic device the rear end of the vehicle so that part of the load resting on the rear axles of the vehicle on the front axle of the Jvehicle as well as on the bathrooms of the Load distribution trailer is transferred "

For reasons "known and described in the literature" are The baths of the load distribution trailer are relatively tight side by side in year end longitudinal aclise and at a great distance from placed at the sintering end of the vehicle · This has Jecbsjoii aur

00 9 828 / 12S8

...... BATH ORIGINAL

Iblge that everyone on the quarrels of the load distribution trailer transfer / load is mounted on a substructure, which has a far lower lateral stability than the truck, so that so because of the fixed connection of the load distribution trailer with the truck, through which the much lower lateral stability of the trailer is transferred to the truck, also has an adverse effect on its lateral stability · This means that all of the above-mentioned factors affect the lateral stability of a delivery mixer will have a particularly unfavorable effect on vehicles of this type that are equipped with a load distribution trailer are.

The invention makes a concrete delivery mixer (Truxmi shear) created with a mixer drum rotatably mounted on a truck, which during the years with simultaneous operation the mixing drum has a significantly improved lateral stability compared to the known constructions by, according to the invention by lateral displacement of the drum axis of rotation to the longitudinal center plane opposite to the area in which the mass of the concrete components is circulated and mixed within the drum, the distance of the center of gravity of this circulating mass from the longitudinal median plane of the vehicle is reduced

The preferred embodiment of the invention consists in one for both bearing points of the drum ends evenly eccentric arrangement, with the front end of the drum for receiving The drum's axis of rotation is provided with a self-adjusting spherical roller bearing, while the rear end of the drum is carried by a pair of balls, which in an axis of rotation concentric to the drum extends around the outside of the drum guide track engages «The front spherical roller bearing is carried by a bearing block and in this in the desired position ten distance to the table rz eu arranged longitudinally in the middle of the plane • The pair of rollers carrying the rear end of the drum is mounted on a bracket mounted on the rear end of the drum and can also

009828/1258

BATH ORIGINAL

can be adjusted sideways until the rear end of the drum receives a laterally offset position to the longitudinal median plane of the vehicle.

The ones required for the laterally twisted arrangement of the mixing drum Adjustments can, with one exception, "in the usual concrete delivery mixers without construction changes ·· The bearing block for the support rollers of the rear is an exception End of the drum, because this bearing block must be wider than the usual ones of this type, so that the required lateral Relocation of the support rollers a sufficient margin remains.

According to a further preferred embodiment of the invention the lateral displacement of the mixing drum in the specified direction can also be done exclusively by shifting it accordingly of the front pendulum roll! age rs can be made. Another beneficial option is to use the front spherical roller bearing in its with the vehicle longitudinal mit- * to leave the coincident position at the mid-plane and only the pair of bolts on which the rear end of the drum is mounted, laterally to move. The drum axis of rotation then runs in both cases obliquely to the longitudinal center axis of the chassis

The c-rfindungsgemäßen measures for different concrete delivery-mixer types are suitable, but especially au recommend zir Stabilität.overbesserung of such lüischer-types, which are equipped with a istverteilungsanhänger L "

Ira folj? Ond-3n "verdeii some .examples of the invention anh'jiid l-.r Z ^ icu: i-ine; boscxirleben »In this aoigea:

ilg »1 -In-- Jv? ^? uf-" -, iciib on the. nlülcwürti ^ en part of a B'vfconliei'siV'l. '^ ir-'i: "- .. i - ·; Γί. fc ä'jit.li'ih - / ofV ^ fc ^ fc ;; ola ^ ert; -ir i-λΐί ι-ί "·: -Ί - Llnk-3iij iiiuv-är-iiila -löL ^ o parts;, 1ίλ1, ..- ■; ■ / {. ■ ' ic it -.! Iar .'- ' u ull - * «; ?? : i _r . :; Oiif'H) .r, A ;; t, ■ : - ', .. - ·: ν · -ϊ * 1ά * ι ■''■ - · in? -, v: X $ v- <irv \ -} * \ Tjv · "■;' - : -: = r- '·' - .ii.? 'in ~ ^

0 0 ^f ) B 2 ') /! ,! *; si

BATH ORIGINAL

FIG. 2 shows a side view of the carriage part according to FIG. 1 and FIG on this mounted mixing drum with Ladetrichtex and part of the drum drive units j

Fig # 3 is a plan view of an embodiment for a. different type of drum storage on the! chassis and

Jig. 4 shows a plan view of an exemplary embodiment for a third type of drum mounting on the chassis.

Fig »1 shows the storage of the mixing drum 1 on the rear Part of the truck chassis 2 in the preferred way according to the invention »The chassis rests on the rear wheels 5 · The front part of the chassis with the driver's cab and the drive motor has been omitted.

As in FIG. 1, it can also be seen from FIG. 2 that this is a known frustoconical and inclinedly mounted mixing drum 1, the front or head end of which has a pin 4 protruding in extension of the axis of rotation X, which from an automatically adjusting spherical roller bearing 5 is received in a bearing block 6.

Near the open rear end of the drum 1 is on its On the outside, concentric to the axis of rotation X, a circular Bollenbahn 7 is provided »The rear end of the drum is rotatable mounted on a pair of supporting rollers 8, which is supported by a frame 9 is borrowed and engaged with the roller conveyor 7 in the roll.

The bearing block 6 and the frame 9 are at the front baw · back terenden of two longitudinal members 10 attached, which in turn with are bolted or otherwise connected to the chassis »of truck 2»

One of the driving forces of the ironing drum 1 is an on Lhi? ör - '/ jäS in front of BoI Leu bahn 7 and iümlich like this boFöin:! ^ .-'"---'-■" -ihnlrr-jiia 11, d? .v over a Treibkybt,} 12 with yi.nem fe't .i.ir-d ι-jt'biina'äu lab, ^ wlohes - ;. iii d / iu Ί agemnofcor or -Ui ^ .mi ··!? -

OO 9 j 2 H / 1 2 6 ι)

BATH ORIGINAL

Power source via a countershaft 13 »a reduction gear 14 and a torque converter is driven.

Mg, 2 also shows the lull funnel · 15 for introducing the concrete components into the open end of the drum and the discharge chute 16 for the finished concrete. " A semicircular bent sheet metal 17 is attached with its ends to the frame 9 and serves both as a cover for the roller conveyor 7 and the toothed ring ΛΛ and as a carrier for the filling funnel 15 and the discharge chute 16, which, however, also individually or both with the load distribution trailer 23 can be connected

If the mixing drum 1 is filled with the concrete components in the mixing direction, i.e. When viewed from the rear, clockwise, the concrete is turned by the action of the on the inside of the drum Screw blades (not shown) moved forwards and to the left »Since the mixing of the concrete components or the Premixed concrete is usually done while driving to the site, which is caused by sideways movement and accumulation of the concrete caused strong shift of the center of gravity, as already explained above, on the cause of an instability of the vehicle acting on the same side »To compensate for this shift in the center of gravity and thus to maintain the stability of the vehicle in the embodiment according to FIG. 1 - in the viewing direction from back, in ELg. 1 seen from the left - the drum axis of rotation

0 X to the right of the longitudinal center plane passing through the longitudinal axis of the car staggered.

It has been shown that an even offset of the front and rear ends of the drum by about 50 mm is sufficient to bring the center of gravity of the drum contents closer to the vertical longitudinal center plane of the vehicle during the whisking process. With such an offset of about 50 mm, there are also no noteworthy -Jff "^ ^ mTrIfi vvn- construction

009828/1268 changes

BATH ORIGINAL

changes in the known and customary concrete delivery mixers

The self-aligning bearing is used for the purpose of this lateral drum displacement 5, which carries the front end of the drum, in the upper one Part of the bearing block it 6 pushed accordingly to the right « This relocation of the warehouse 5 can be carried out with the usual concrete delivery mixers without structural changes, because the bearing blocks used for these have sufficient side clearance in their upper part "

The rear drum part is also offset by the lateral displacement of the support rollers 8 by the same amount and in the same direction as the spherical roller bearing 5 necessary lateral displacement of the rollers 8 to win. The frame 9 has two upwardly diverging channel members 20 which are connected to one another by upper and lower cross struts 21 or 22. By slight enlargement of the divergence between the Einiiengliedern 20 or by increasing the length of the cross members 21 and 22, the frame width _s are enlarged as far as to the right * particular this allows the required displacement of the support rollers 8 two rollers to the right ,,

The offset drum mounting described above is particularly suitable for delivery mixers (Truxmischer) with connected load distribution trailer · In ilg * 1 and 2 such a load distribution trailer 23 of known design is shown, which is in drive connection with the rear end of the truck _e

The load distribution trailer 23 consists of a U-frame 24, its fork arms 25 at their rear ends by a cross arm 26 are connected to each other · The free front ends, the Both fork arms 25 are attached to one with the wagon base 2 permanently connected additional frame 27 articulated · The U-frame

009828/1258

,, BAD ORiGiNAL

may to its articulation between an upper layer (not shown) near the rear of the mixer and a lower effective position according to ELg. * 1 and 2 are pivoted » A support wheel assembly 28 is attached to the cross arm 26, which has two closely spaced wheels 29 on those who have a supporter in their lower realm *

To move the trailer frame 24 between its upper and lower layer serve two hydraulic cylinders 30 »each of these cylinders 30 is. on his silks with the front end of a saber arm 25 or * with the additional frame 2? articulated * the Cylinders 30 also serve to distribute the. On the truck rear wheels 3 weight or part thereof on the front axle ″ of the truck and on the wheels 29 of the trailer * So, in the illustrated lower position of the Trailer 23, the pair of cylinders 30 pressurized, so if this pressure is planted through the original frame 24 on the support wheel assembly 28 and causes the rear 3-car end to be lifted. As a result of the large distance between the carrying wheel arrangement 28 and the rear wheels 3 of the truck, the long lever arm thus created for the lifting force also results in a a substantial part of the load resting on the rear wheels 3 relocated the front axle of the truck *

The carrying wheel arrangement 28 is hinged to the frame 24, and the two trailer wheels 29 are close to one another so that the trailer can easily follow all cornering movements of the vehicle without impairing the maneuverability of the vehicle or requiring a larger curve radius will and without major wear of the trailer wheels "Since the Anhängerrädei · 29 have a much smaller gauge ds the truck rear wheels 3s they provide a much ■: l .ineren side hait ₉ so ^ that al so § when part itxBX the ί; ■■ The load carried by the rear wheels 3 of the truck by loading ■■ - ■, "impact of the cylinder $ 0 · backwards on the trailer wheels - ■■" ■ is tolerated, the lateral stability of the vehicle is tolerated. -.ν '^ r is reduced From this it follows that the invention

828/1268 BSS & SL

^; ■ - ORIGINAL BATHROOM

appropriate displacement of the mixing drum · very particularly advantageous is for concrete truck mixers with a. Weight distribution annex

ViIe can be found in US Pat. No. 3,317,193,. is . the chassis of a concrete mixer with load distribution lungs trailer much longer than with such a vehicle without Trailer and therefore less resistant to ■■. Torsional forces caused by the displacement of the concrete during mixing in the drum and the uneven road surface are triggered and lead to a twisting of the chassis, through which the lateral stability of the vehicle is additionally reduced ». ·. . .

The other two Ausfiihrungsarten the invention are shown in Fig "" 3 and 4 · They are based on the same principle as in the case of the preferred embodiment shown in FIG ₉ I and differ from the latter by a slightly modified side versdbzung the mixing drum, whose axis of rotation X namely here not, seen from above, runs parallel, but at an oblique angle to the longitudinal axis C of the vehicle frame 2 »-.

In the embodiment according to FIG. 3, the front end of the drum 1 with the associated bearing 5 is similar and in the same way. Offset direction laterally as # ei of the preferred Off _s not laterally offset fiihrungs form according to Figures 1 and 2 ₈ carrying rollers (not shown) while the rear end of the drum and, but, also seen from above *, zentriseh to the longitudinal axis G of the vehicle 2 is arranged are _s Since, therefore, only the front end of the drum is rarely displaced, this lateral displacement must be larger than in the case of the embodiment of Figure "1 and 2 so that practically the same compensation for the described lateral displacement of the smoldering? * = · * point of BetonmasiSe during äes ^; Mischirorgaiiges in DEI ^Trom-: wirdo mel made in the Ausführungsfoim of FIG "3"'is there, "* fro the side distance between, ö the Fahrzeuglättgsachse and" Trommeldreiiachse X irorsugsweise double "' sq gs NE gewäaltV he so'daß about? ^ ⁰⁰ Q Wb lä ^ fg ^ 'H g ο

BATH ORIGINAL

The fact that according to Hg * 3 the rear he ends of the drum 1 aligned is that its axis of rotation X, seen from οι en, the J the longitudinal axis G of the vehicle intersects approximately at the height of the roller conveyor 7, "The roller support frame 9 does not need to be changed, as in the case of the preferred embodiment according to üg» t and 2J, Rather, it is sufficient that the support rollers (not shown) are only slightly tilted relative to the longitudinal axis C of the year, so that you can track exactly with the roller conveyor 7

In the embodiment according to Üg »4, only the rear end of the drum is laterally offset, while the bearing 5 for the front drum end centrally in the bearing block g and. is attached to the vehicle longitudinal axis C "The Hinterehde of the drum is offset in the same manner as in the case of the preferred embodiment of FIG« I ₆ However, the degree of lateral displacement must also be large, and ₉ similarly to the embodiment according to Jig * 3 "about are doubled so that the drum axis of rotation Z, seen from above, runs laterally offset by about 100 mm from the vehicle longitudinal axis G at the level of the roller conveyor 7 * In this embodiment, the roller support frame 9 must be changed or widened in the same way as in the case of the preferred embodiment according to FIG.

To discharge the finished concrete from the drum 'according to Kg.1 up to 4- this is opposite to the direction of rotation when Siischen turned. Here, the concrete is moved backwards by the screw blades in the drum and, viewed from the rear, along the right drum was te moved, so that when discharging of the concrete moves its mass in the lateral direction in which the drum is offset Stability of the .vehicle not or hardly impaired., And for two reasons «On the one hand, the! vehicle is emptying the drum not or only very slowly "moves and rotated;" so that it does not have the harmful influence of Jliehkraft is exposed, and on the other hand affects because of the tapering of the drum towards the rear ruag of the concrete in the drum is nowhere near as strong as

00 9828/125 8;

BATH ORIGINAL

~ 12 -

when mixing and stirring the concrete

! The invention is not limited to those shown and described Embodiments limited, .more can in the frame the invention various appropriate modifications and developments can be made »

0098 28/1258
BAD OHfGlNAL

Claims (1)

PATENT CLAIMS 1 «J Concrete delivery mixer with a mixer drum rotatably mounted on a truck for mixing the concrete while driving from the concrete factory to the construction site» characterized in that the lateral displacement of the drum axis of rotation (X ₉ Y ₉ Z) to the vehicle's longitudinal axis (G ) opposite to the direction of the sideshift of the concrete occurring in the drum (1) during the mixing process, the center of gravity of the concrete in circulation is moved closer to the vehicle's longitudinal axis (G) «, 2o concrete delivery mixer with a mixing drum rotatably mounted on a truck, which has at least one front opening for receiving the concrete components and for discharging the finished concrete as well as screw blades attached to the drum inner wall for mixing and discharging the concrete and in which during the mixing process by circulation and accumulation of the drum content a drum, the center of gravity of the drum contents is shifted to this side, characterized in that to reduce the influence of the shift in center of gravity on the stability of the vehicle, the bearings carrying the ends of the drum are arranged in such a way that the drum axis of rotation (X) is opposite to the direction the shift in the center of gravity is laterally offset to the vertical longitudinal center plane of the vehicle 3 · Device according to claim 2, characterized in that the Drum axis of rotation (2) parallel to the vertical longitudinal center plane of the vehicle laterally, offset. 4 ·· Device according to claim 2, characterized in that the mixing drum (1) is frustoconical with a wide closed Front end and narrow open rear end formed 1st and ' its axis of rotation (X) runs obliquely upwards to the rear end. 009828/1258 ■ ^; ~ 14-- % Device after. Claim 4-, characterized; that. the drum's axis of rotation (X) is in one to the longitudinal axis of the vehicle (C). extending at a distance parallel perpendicular plane 6. Device according to claims 2 to 5 »characterized in that that a load distribution trailer to the rear end of the vehicle is connected and with this to exercise of lifting forces is in drive connection, where at. through the Lateral displacement of the drum axis of rotation (X) relative to the! vehicle! longitudinal axis (G) the lateral instability of the vehicle is reduced 7 »Device according to claim 7> characterized in that the Load distribution trailer one to the rear of the vehicle has articulated frame (24) to which one of two closely adjacent baths (29) existing wheel set (28) is rotatably articulated, and with working equipment (30) in connection stands, the pressure forces exerted by these on the frame (24) affecting the rear axle load on the vehicle trigger a reducing leverage effect of the frame (24). 009 828/1258