EP3675992A1 - Construction material mixer - Google Patents

Construction material mixer

Info

Publication number
EP3675992A1
EP3675992A1 EP17798163.6A EP17798163A EP3675992A1 EP 3675992 A1 EP3675992 A1 EP 3675992A1 EP 17798163 A EP17798163 A EP 17798163A EP 3675992 A1 EP3675992 A1 EP 3675992A1
Authority
EP
European Patent Office
Prior art keywords
building material
material mixer
mixer according
blades
blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17798163.6A
Other languages
German (de)
French (fr)
Other versions
EP3675992B1 (en
Inventor
Ingolf DETLOFF
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ammann Schweiz AG
Original Assignee
Ammann Switzerland Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ammann Switzerland Ltd filed Critical Ammann Switzerland Ltd
Publication of EP3675992A1 publication Critical patent/EP3675992A1/en
Application granted granted Critical
Publication of EP3675992B1 publication Critical patent/EP3675992B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/071—Fixing of the stirrer to the shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
    • B01F27/11253—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis the blades extending oblique to the stirrer axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/40—Mounting or supporting mixing devices or receptacles; Clamping or holding arrangements therefor
    • B01F35/41—Mounting or supporting stirrer shafts or stirrer units on receptacles
    • B01F35/412—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting both extremities of the shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/052—Stirrers with replaceable wearing elements; Wearing elements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/0806—Details; Accessories

Definitions

  • the invention relates to a building material mixer, in particular asphalt or concrete mixers, according to the preamble of claim 1.
  • Building material mixers usually consist of a container with at least one driven shaft, are mounted at the perpendicular to the shaft blades bearing mixing arms at intervals to each other.
  • the blades are arranged at a distance from the inner wall of the container.
  • the mixing arms have an inner part connected to the shaft and an outer part carrying the blades. These two parts are connected to each other by means of an adjustable, screw-connecting device.
  • the actual operational connection between the outer parts and the inner parts is fertilized by means of a variety of fferverbin- made locally, when the worn blades must be replaced. In known building material mixers, as they are for.
  • the invention is based on the object to remedy this situation and educate the generic mixer without undue constructive effort so that the replacement of the blades can be done with minimal expenditure of time.
  • the stated object is solved by the features of claim 1.
  • the invention is in any case realized when the proper connection between the inner part and the outer part of a mixing arm in building material mixers by plug, snap, snap and / or bayonet connection is made. This makes it possible to mount new blades without the use of tools.
  • the latching connection device on the one hand consists of two pins provided with detent openings, the concurrent with the mixing arm at the end of the inner part at a distance from the diameter of a blade bearing bolts are arranged.
  • the latching connection device comprises two central perforated mold parts enclosing the pins, of which one is provided with two spring tabs which can be fitted in latching openings of the pins, as well as a bolt carrying the blade, which makes possible an operational connection between the molded parts. Through this connection, the items are connected via the bolts with the blade to then produce a proper connection of the outer part with the inner part having the pins.
  • the assembly of the outer part is factory-made, while the assembly of the building material mixer takes place with new blades on site.
  • the distances of the blades to the container inner wall can be adjusted in a simple manner by spacers of different thickness are arranged at the junction between the outer part and the inner part.
  • the invention also relates to a method for carrying out the replacement of blades of a building material mixer.
  • the protective cover is removed from the sleeve, the connection is released and removed the blade to be replaced.
  • the prefabricated locking connection device is fitted with the new blade on the pins.
  • FIG. 2 is a perspective view of a mixing arm (inner part) and a side exploded view of an outer part (blade and locking device),
  • Fig. 3 is a perspective view of FIG. 2 from the front side and
  • Fig. 4 is a perspective view of FIG. 2 from the rear side.
  • the figures show a building material mixer with a cylindrical container 1 with a driven central shaft 5, to which blades 12 carrying perpendicular mixing arms 6 are fixed at intervals.
  • the axes of the mixing arms with the axis of the shaft 5 may include a different angle.
  • the blades 12 are at a distance from the inner wall of the container 1.
  • the mixing arms 6 are divided into an inner part 1 1 connected to the shaft 5 and an outer part 13 carrying the blade 12. Both parts can be connected to one another by means of an adjustable connecting device 14.
  • the connecting device is generally designed so that the actual operational connection between the two parts, ie the inner part and the outer part, by plugging, snapping and / or twisting is made.
  • the advantage of these compounds is that they can be manufactured without tools, which is particularly important when replacing a variety of blades.
  • a building material mixer is shown. It consists of a cylindrical container 1, which is closed with a cover 2. Centrally in the container 1, a shaft 5 is mounted by means of bearings 3, 4, are attached to the mixing arms. Only a mixing arm 6 is shown in detail, other 7 - 10 are only hinted at.
  • the shaft 5 usually carries a plurality of mixing arms with blades which project from the shaft 5, preferably at right angles.
  • the shaft 5 is rotated by a drive 15, for example an electric motor.
  • the mixing arm 6 comprises an inner part 1 1 connected to the shaft 5 and an outer part 13 carrying a blade 12, wherein both parts can be detachably connected to one another by means of an adjustable connecting device 14.
  • the mixing arm 6 is shown in more detail in Figures 2-4.
  • the inner part 1 1 according to FIG. 2 consists of a Mischarmfuß 16 connected to the shaft, for example by means of a screw connection, and a protruding molded part from whose foot-free end face 17 two pins 18, 19 (FIGS. 3 and 4) protrude concurrently with the molded part.
  • These pins have latching recesses or latching openings 20, 21 and thus form part of a latching device 22 (FIG. 4).
  • a second part of the latching device 22 is formed by two centrally perforated mold parts 23, 24.
  • the molded part 23 is provided with two laterally of the perforation 23 a arranged spring tabs 25, 26, which are insertable into the locking recesses 20, 21.
  • the molded part 24 is supplemented to a cage, which serves to receive the two pins 18 and 19 and protect against working material.
  • a bolt 27 is guided, at one end of a blade 12 is attached via a square piece 28 and which is provided at the other end with a threaded portion 29.
  • This threaded portion 29 is provided in the operating state of the outer part 13 (FIG. 1) with a nut 31, which in turn can be covered by a sleeve 30 with protective cover 32.
  • the sleeve 30 can be closed to protect the screw against working material with the protective cover 32 arranged at the end. It is essentially a can-lid connection that is simple is solvable.
  • the square piece 28 is used in conjunction with folds of the molding 23 to prevent twists of the blade 12.
  • the unit consisting of the parts 12, 28, 27, 29, 23, 24, 30, 31, 32 is preassembled when the blade is replaced, the nut 31 of the screw connection being firmly tightened.
  • This screw is used only for cohesion of the above-mentioned unit, but not for the preparation of a screw connection between the outer part 13 and the blade 12 and the inner part (arm) 11, as in the conventional building materials mixers in which the actual connection between the arm and the Shovel is made by means of a screw connection, which must be solved when replacing the blade, with a special tool.
  • the structure of the mixing arm is thus made such that instead of using a conventional cutting torch or cutters in a very short time the protective cover 32 removed, the nut 31, which holds the unit together, dissolves and can remove the spent blade from the latching connection device 22.
  • the new unit can then just as quickly be plugged onto the pins 18, 19, wherein the spring tabs 25, 26 engage in the latching openings 20, 21.
  • the distance of the blade edge from the inner wall of the container 1 can be adjusted by means of spacers 23b slipped over the pins 18, 19.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The invention relates to a construction material mixer, in particular an asphalt or concrete mixer, consisting of a container (1) having at least one driven shaft (5) to which mixing arms (6) carrying blades (12) are fastened at intervals, the blades (12) being at a distance from the inner wall of the container (1), the mixing arms (6) being divided into an inner part (11), which is connected to the shaft (5), and an outer part (13), which carries the blades (12), and both parts being connectable to each other by means of an adjustable connection device (22). The invention is based on the fact that the connection device (22) is a snap connection device. A particular embodiment and a rapid blade replacement method are described.

Description

Baustoffmischer  construction material mixers
Die Erfindung betrifft einen Baustoffmischer, insbesondere Asphalt- oder Betonmischer, nach dem Oberbegriff des Anspruchs 1. The invention relates to a building material mixer, in particular asphalt or concrete mixers, according to the preamble of claim 1.
Baustoffmischer bestehen in der Regel aus einem Behälter mit mindestens einer angetriebenen Welle, an der senkrecht zur Welle Schaufeln tragende Mischarme in Abständen zueinander befestigt sind. Dabei sind die Schaufeln mit Abstand von der Innenwand des Behälters angeordnet. Die Mischarme weisen ein mit der Welle verbundenes Innenteil sowie ein die Schaufeln tragendes Außenteil auf. Diese beiden Teile sind mittels einer einstellbaren, Schrauben aufweisenden Verbindungsvorrichtung miteinander verbindbar. Die eigentliche betriebsgemäße Verbindung zwischen den Außenteilen und den Innenteilen wird mittels einer Vielzahl von Schraubverbin- düngen hergestellt, und zwar vor Ort, wenn die verschlissenen Schaufeln ausgewechselt werden müssen. Bei bekannten Baustoffmischern, wie sie z. B. in den nachstehenden Druckschriften beschrieben sind (W02006/007778A1 , EP01 11148A2, EP2007275700, US3738774, US5061082, DE9410951 U1 , US3773436, US3773436A, CH408743A), ist der Austausch der verschlissenen Schaufeln mit einem erheblichen Zeitaufwand verbunden, da alle Schraubverbindungen der Mischarme - ein Baustoffmischer weist in der Regel eine Vielzahl von Mischarmen auf - zumindest einmal betätigt werden müssen. Sind die Teile zudem verschlissen, verklebt durch anhaftendes Mischgut oder miteinander verschweißt, müssen zusätzliche Maßnahmen (beispielsweise Schneidbrenner oder Trennschleifer) getroffen werden, um den Baustoffmischer mit neuen Schaufeln zu bestücken. Building material mixers usually consist of a container with at least one driven shaft, are mounted at the perpendicular to the shaft blades bearing mixing arms at intervals to each other. The blades are arranged at a distance from the inner wall of the container. The mixing arms have an inner part connected to the shaft and an outer part carrying the blades. These two parts are connected to each other by means of an adjustable, screw-connecting device. The actual operational connection between the outer parts and the inner parts is fertilized by means of a variety of Schraubverbin- made locally, when the worn blades must be replaced. In known building material mixers, as they are for. W02006 / 007778A1, EP0111148A2, EP2007275700, US3738774, US5061082, DE9410951 U1, US3773436, US3773436A, CH408743A), the replacement of the worn blades is associated with a considerable expenditure of time since all screw connections of the mixing arms, a building material mixer usually has a plurality of mixing arms - must be operated at least once. If the parts are also worn, adhesively bonded by adhering mix or welded together, additional measures (eg cutting torch or cut-off grinder) must be made to equip the building material mixer with new blades.
Ausgehend von dem obigen Stand der Technik liegt der Erfindung die Aufgabe zu Grunde, hier Abhilfe zu schaffen und den gattungsgemäßen Mischer ohne unangemessenen konstruktiven Aufwand so weiterzubilden, dass der Austausch der Schaufeln mit minimalem Zeitaufwand erfolgen kann. Die gestellte Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Based on the above prior art, the invention is based on the object to remedy this situation and educate the generic mixer without undue constructive effort so that the replacement of the blades can be done with minimal expenditure of time. The stated object is solved by the features of claim 1.
Man erkennt, dass die Erfindung jedenfalls dann verwirklicht ist, wenn die betriebsgemäße Verbindung zwischen dem Innenteil sowie dem Außenteil eines Mischarms bei Baustoffmischern durch Steck-, Einrast-, Schnapp- und/oder Bajonettverbindung hergestellt wird. Dadurch ist es möglich, neue Schaufeln ohne Einsatz von Werkzeu- gen zu montieren. It can be seen that the invention is in any case realized when the proper connection between the inner part and the outer part of a mixing arm in building material mixers by plug, snap, snap and / or bayonet connection is made. This makes it possible to mount new blades without the use of tools.
Weitere zweckmäßige und vorteilhafte Maßnahmen der Erfindung gehen aus den Unteransprüchen hervor. Further expedient and advantageous measures of the invention will become apparent from the dependent claims.
Gemäß einer weiteren Ausbildung der Erfindung besteht die Rastverbindungsvorrichtung einerseits aus zwei mit Rastöffnungen versehenen Zapfen, die gleichlaufend mit dem Mischarm am Stimende des Innenteils im Abstand des Durchmessers einer die Schaufel tragenden Bolzen angeordnet sind. Andererseits umfasst die Rastverbindungsvorrichtung zwei die Zapfen einfassende zentral gelochte Formteile, von denen die eine mit zwei in Rastöffnungen der Zapfen einpassbaren Federlaschen versehen ist, sowie einen die Schaufel tragenden Bolzen, der eine betriebsgemäße Verbindung zwischen den Formteilen ermöglicht. Durch diese Verbindung werden die Einzelteile über die Bolzen mit der Schaufel verbunden, um sodann eine betriebsgemäße Verbindung des Außenteils mit dem Innenteil, der die Zapfen aufweist, herzustellen. Der Zusammenbau des Außenteils wird fabrikmäßig hergestellt, während die Bestückung des Baustoffmischers mit neuen Schaufeln vor Ort erfolgt. According to a further embodiment of the invention, the latching connection device on the one hand consists of two pins provided with detent openings, the concurrent with the mixing arm at the end of the inner part at a distance from the diameter of a blade bearing bolts are arranged. On the other hand, the latching connection device comprises two central perforated mold parts enclosing the pins, of which one is provided with two spring tabs which can be fitted in latching openings of the pins, as well as a bolt carrying the blade, which makes possible an operational connection between the molded parts. Through this connection, the items are connected via the bolts with the blade to then produce a proper connection of the outer part with the inner part having the pins. The assembly of the outer part is factory-made, while the assembly of the building material mixer takes place with new blades on site.
Gemäß einer weiteren Ausbildung der Erfindung ist das nicht mit den Federlaschen versehene Einzelteil als die Rastnasen aufnehmender Käfig ausgebildet. Damit kann einem Verkanten der Schaufel entgegengewirkt werden. According to a further embodiment of the invention, which is not provided with the spring tabs item as the locking lugs receiving cage is formed. This can be counteracted tilting of the blade.
Mit der Ausbildung des Baustoffmischers gemäß der Erfindung lassen sich auch auf einfache Weise die Abstände der Schaufeln zur Behälterinnenwand einstellen, indem an der Stoßstelle zwischen dem Außenteil und dem Innenteil Distanzkörper unterschiedlicher Dicke angeordnet werden. With the formation of the building material mixer according to the invention, the distances of the blades to the container inner wall can be adjusted in a simple manner by spacers of different thickness are arranged at the junction between the outer part and the inner part.
Die Erfindung betrifft auch ein Verfahren zur Durchführung des Ersatzes von Schaufeln eines Baustoffmischers. Dazu wird der Schutzdeckel von der Hülse entfernt, die Verbindung gelöst und die zu ersetzende Schaufel entfernt. Danach wird die vorgefertigte Rastverbindungsvorrichtung mit der neuen Schaufel auf die Zapfen aufgesteckt. Dadurch lassen sich die Rastverbindungsvorrichtung besonders schnell lösen und die alte Schaufel entfernen. The invention also relates to a method for carrying out the replacement of blades of a building material mixer. For this purpose, the protective cover is removed from the sleeve, the connection is released and removed the blade to be replaced. Thereafter, the prefabricated locking connection device is fitted with the new blade on the pins. As a result, the locking connection device can be solved very quickly and remove the old blade.
Die Erfindung wird nun anhand von Ausführungsbeispielen näher erläutert. Es zei- gen: Fig. 1 einen Schnitt durch einen Baustoffmischer mit einem ausgeführten Mischarm und weiteren angedeuteten Mischarmen, The invention will now be explained in more detail with reference to exemplary embodiments. Show it: 1 shows a section through a building material mixer with a running mixing arm and further indicated mixing arms,
Fig. 2 eine perspektivische Ansicht eines Mischarms (Innenteil) und eine seitliche Explosionsdarstellung eines Außenteils (Schaufel und Rastvorrichtung), 2 is a perspective view of a mixing arm (inner part) and a side exploded view of an outer part (blade and locking device),
Fig. 3 eine perspektivische Ansicht der Fig. 2 von seitlich vorn und Fig. 3 is a perspective view of FIG. 2 from the front side and
Fig. 4 eine perspektivische Ansicht der Fig. 2 von seitlich hinten. Fig. 4 is a perspective view of FIG. 2 from the rear side.
Die Figuren zeigen einen Baustoffmischer mit einem zylindrischen Behälter 1 mit einer angetriebenen zentralen Welle 5, an der senkrecht zur Welle Schaufeln 12 tra- gende Mischarme 6 in Abständen befestigt sind. Allgemein können die Achsen der Mischarme mit der Achse der Welle 5 einen anderen Winkel einschließen. Die Schaufeln 12 weisen einen Abstand von der Innenwand des Behälters 1 auf. Die Mischarme 6 sind in ein mit der Welle 5 verbundenes Innenteil 1 1 und ein die Schaufel 12 tragendes Außenteil 13 aufgeteilt. Beide Teile sind mittels einer einstellbaren Verbindungsvorrichtung 14 miteinander verbindbar. Die Verbindungsvorrichtung ist allgemein so ausgebildet, dass die eigentliche betriebsgemäße Verbindung zwischen den beiden Teilen, also dem Innenteil und dem Außenteil, durch Stecken, Einrasten und/oder Verdrehen hergestellt wird. Der Vorteil dieser Verbindungen besteht darin, dass sie werkzeugfrei hergestellt werden können, was bei Austausch einer Vielzahl von Schaufeln von besonderer Bedeutung ist. The figures show a building material mixer with a cylindrical container 1 with a driven central shaft 5, to which blades 12 carrying perpendicular mixing arms 6 are fixed at intervals. In general, the axes of the mixing arms with the axis of the shaft 5 may include a different angle. The blades 12 are at a distance from the inner wall of the container 1. The mixing arms 6 are divided into an inner part 1 1 connected to the shaft 5 and an outer part 13 carrying the blade 12. Both parts can be connected to one another by means of an adjustable connecting device 14. The connecting device is generally designed so that the actual operational connection between the two parts, ie the inner part and the outer part, by plugging, snapping and / or twisting is made. The advantage of these compounds is that they can be manufactured without tools, which is particularly important when replacing a variety of blades.
In Fig. 1 ist ein Baustoffmischer gezeigt. Er besteht aus einem zylinderförmigen Behälter 1 , der mit einem Deckel 2 abgeschlossen ist. Zentral im Behälter 1 ist mittels Lager 3, 4 eine Welle 5 gelagert, an der Mischarme befestigt sind. Nur ein Mischarm 6 ist ausführlich dargestellt, aridere 7 - 10 sind nur angedeutet. Die Welle 5 trägt in der Regel eine Vielzahl von Mischarmen mit Schaufeln, die von der Welle 5 vorzugsweise rechtwinklig abstehen. Die Welle 5 wird durch einen Antrieb 15, beispielsweise einen Elektromotor, in Drehung versetzt. Der Mischarm 6 umfasst ein mit der Welle 5 verbundenes Innenteil 1 1 sowie ein eine Schaufel 12 tragendes Außenteil 13, wobei beide Teile mittels einer einstellbaren Verbindungsvorrichtung 14 miteinander lösbar verbindbar sind. Der Mischarm 6 ist in den Figuren 2 - 4 näher dargestellt. In Fig. 1, a building material mixer is shown. It consists of a cylindrical container 1, which is closed with a cover 2. Centrally in the container 1, a shaft 5 is mounted by means of bearings 3, 4, are attached to the mixing arms. Only a mixing arm 6 is shown in detail, other 7 - 10 are only hinted at. The shaft 5 usually carries a plurality of mixing arms with blades which project from the shaft 5, preferably at right angles. The shaft 5 is rotated by a drive 15, for example an electric motor. The mixing arm 6 comprises an inner part 1 1 connected to the shaft 5 and an outer part 13 carrying a blade 12, wherein both parts can be detachably connected to one another by means of an adjustable connecting device 14. The mixing arm 6 is shown in more detail in Figures 2-4.
Das Innenteil 1 1 besteht nach Fig. 2 aus einem mit der Welle beispielsweise mittels einer Schraubverbindung verbundenen Mischarmfuß 16 und einem aus diesem herausragenden Formteil, aus dessen fußfreier Stirnfläche 17 zwei Zapfen 18, 19 (Figuren 3 und 4) gleichlaufend mit dem Formteil herausragen. Diese Zapfen weisen Ras- tausnehmungen oder Rastöffnungen 20, 21 auf und bilden damit Teil einer Rastvorrichtung 22 (Fig. 4). Ein zweites Teil der Rastvorrichtung 22 wird durch zwei zentral gelochte Formteile 23, 24 gebildet. Das Formteil 23 ist mit zwei seitlich der Lochung 23a angeordneten Federlaschen 25, 26 versehen, die in die Rastvertiefungen 20, 21 einbringbar sind. Das Formteil 24 ist zu einem Käfig ergänzt, der dazu dient, die beiden Zapfen 18 und 19 aufzunehmen und vor Arbeitsmaterial zu schützen. Durch die Lochungen 23a und 24a der Formteile 23, 24 ist ein Bolzen 27 geführt, an dessen einem Ende eine Schaufel 12 über einem Vierkantstück 28 befestigt ist und der am anderen Ende mit einem Gewindeabschnitt 29 versehen ist. Dieser Gewindeabschnitt 29 ist im Betriebszustand des Außenteils 13 (Fig. 1 ) mit einer Mutter 31 versehen, die ihrerseits durch eine Hülse 30 mit Schutzdeckel 32 abdeckbar ist. Die Hülse 30 kann zum Schutz der Schraubverbindung gegen Arbeitsmaterial mit dem endseitig angeordneten Schutzdeckel 32 geschlossen werden. Es handelt sich dabei im Wesentlichen um eine Dosen-Deckel-Verbindung, die einfach lösbar ist. Das Vierkantstück 28 dient in Verbindung mit Abkantungen der Formteil 23 dazu, Verdrehungen der Schaufel 12 zu vermeiden. The inner part 1 1 according to FIG. 2 consists of a Mischarmfuß 16 connected to the shaft, for example by means of a screw connection, and a protruding molded part from whose foot-free end face 17 two pins 18, 19 (FIGS. 3 and 4) protrude concurrently with the molded part. These pins have latching recesses or latching openings 20, 21 and thus form part of a latching device 22 (FIG. 4). A second part of the latching device 22 is formed by two centrally perforated mold parts 23, 24. The molded part 23 is provided with two laterally of the perforation 23 a arranged spring tabs 25, 26, which are insertable into the locking recesses 20, 21. The molded part 24 is supplemented to a cage, which serves to receive the two pins 18 and 19 and protect against working material. Through the perforations 23a and 24a of the mold parts 23, 24, a bolt 27 is guided, at one end of a blade 12 is attached via a square piece 28 and which is provided at the other end with a threaded portion 29. This threaded portion 29 is provided in the operating state of the outer part 13 (FIG. 1) with a nut 31, which in turn can be covered by a sleeve 30 with protective cover 32. The sleeve 30 can be closed to protect the screw against working material with the protective cover 32 arranged at the end. It is essentially a can-lid connection that is simple is solvable. The square piece 28 is used in conjunction with folds of the molding 23 to prevent twists of the blade 12.
Die aus den Teilen 12, 28, 27, 29, 23, 24, 30, 31 , 32 bestehende Einheit ist bei einem Ersatz der Schaufel vormontiert, wobei die Mutter 31 der Schraubverbindung fest angezogen ist. Diese Schraubverbindung dient lediglich zum Zusammenhalt der oben bezeichneten Einheit, jedoch nicht zur Herstellung einer Schraubverbindung zwischen dem Außenteil 13 bzw. der Schaufel 12 und dem Innenteil (Arm) 11 , wie bei den herkömmlichen Baustoffmischern, bei denen die eigentliche Verbindung zwischen dem Arm und der Schaufel mittels einer Schraubverbindung hergestellt wird, die beim Austausch der Schaufel gelöst werden muss, und zwar mit einem speziellen Werkzeug. The unit consisting of the parts 12, 28, 27, 29, 23, 24, 30, 31, 32 is preassembled when the blade is replaced, the nut 31 of the screw connection being firmly tightened. This screw is used only for cohesion of the above-mentioned unit, but not for the preparation of a screw connection between the outer part 13 and the blade 12 and the inner part (arm) 11, as in the conventional building materials mixers in which the actual connection between the arm and the Shovel is made by means of a screw connection, which must be solved when replacing the blade, with a special tool.
Der Aufbau des Mischarms ist damit derart getroffen, dass man anstelle der Verwendung eines üblichen Schneidbrenners oder Trennschleifers in kürzester Zeit den Schutzdeckel 32 entfernt, die Mutter 31 , welche die Einheit zusammenhält, löst und die verbrauchte Schaufel aus der Rastverbindungsvorrichtung 22 entfernen kann. Die neue Einheit kann dann ebenso schnell auf die Zapfen 18, 19 aufgesteckt werden, wobei die Federlaschen 25, 26 in die Rastöffnungen 20, 21 einrasten. Dabei kann der Abstand der Schaufelkante von der Innenwand des Behälters 1 durch über die Zapfen 18, 19 übergestülpte Distanzkörper 23b eingestellt werden. The structure of the mixing arm is thus made such that instead of using a conventional cutting torch or cutters in a very short time the protective cover 32 removed, the nut 31, which holds the unit together, dissolves and can remove the spent blade from the latching connection device 22. The new unit can then just as quickly be plugged onto the pins 18, 19, wherein the spring tabs 25, 26 engage in the latching openings 20, 21. In this case, the distance of the blade edge from the inner wall of the container 1 can be adjusted by means of spacers 23b slipped over the pins 18, 19.

Claims

Ansprüche claims
1. Baustoffmischer mit einem Behälter (1 ) mit mindestens einer angetriebenen Welle (5), an der Schaufeln (12) tragende Mischarme (6) in Abständen befestigt sind, wobei die Mischarme (6) ein mit der Welle (5) verbundenes Innenteil (11) sowie ein die Schaufeln (12) tragendes Außenteil (13) aufweisen, die miteinander verbindbar sind, 1. building material mixer with a container (1) with at least one driven shaft (5) on the blades (12) carrying mixing arms (6) are fixed at intervals, wherein the mixing arms (6) connected to the shaft (5) inner part ( 11) and an outer part (13) which carries the blades (12) and which can be connected to one another,
dadurch gekennzeichnet,  characterized,
dass das Innenteil (11) mit dem Außenteil (13) durch Steck-, Einrast-, Schnapp- und/oder Bajonettverbindung (22) verbindbar ist.  in that the inner part (11) can be connected to the outer part (13) by plug-in, snap-in, snap-action and / or bayonet connection (22).
2. Baustoffmischer nach Anspruch 1 , 2. building material mixer according to claim 1,
dadurch gekennzeichnet,  characterized,
dass die mit der Welle (5) lösbar verbindbaren Mischarme (6) senkrecht zur Welle angeordnet sind.  in that the mixing arms (6) releasably connectable to the shaft (5) are arranged perpendicular to the shaft.
3. Baustoffmischer nach Anspruch 1 oder 2, 3. building material mixer according to claim 1 or 2,
gekennzeichnet durch  marked by
eine Rastverbindungsvorrichtung (22) mit mindestens einem mit Rastöffnungen (20, 21) versehenen Zapfen (18, 19) sowie mit Rastöffnungen (20, 21) in Betriebszustand zusammenarbeitenden Federlaschen (25, 26).  a latching connection device (22) having at least one pin (18, 19) provided with latching openings (20, 21) and latching openings (20, 21) cooperating in the operating state spring tabs (25, 26).
4. Baustoffmischer nach Anspruch 3, 4. building material mixer according to claim 3,
dadurch gekennzeichnet,  characterized,
dass die Zapfen (18, 19) gleichlaufend mit dem Mischarm (6) am Stirnende des Innenteils (11) im Abstand mindestens des Durchmessers von die Schaufel (12) tragenden Bolzen (27) angeordnet sind. in that the pins (18, 19) are arranged concurrently with the mixing arm (6) at the front end of the inner part (11) at a distance of at least the diameter of bolts (27) carrying the blade (12).
5. Baustoffmischer nach einem der Ansprüche 3 oder 4, 5. building material mixer according to one of claims 3 or 4,
gekennzeichnet durch  marked by
gelochte und zu einem Hohlkörper zusammenbaubare Formteile (23, 24), von denen die eine mit Rastöffnungen (20, 21 ) der Zapfen (18, 19) zusammenarbei- tende Federlasche (25, 26) aufweist und die vom die Schaufel (12) tragenden perforated moldings (23, 24) which can be assembled into a hollow body, of which the one has latching openings (25, 26) cooperating with latching openings (20, 21) of the pins (18, 19) and which bears the blade (12)
Bolzen (27) durchquert sind. Bolts (27) are crossed.
6. Mischarm für Baustoffmischer nach einem der Ansprüche 3 bis 5, 6. mixing arm for building material mixer according to one of claims 3 to 5,
gekennzeichnet dadurch,  characterized by
dass die Formteile (23, 24) in Betriebszustand einen die Zapfen (18, 19) auf- nehmenden Käfig bilden.  in the operating state, the molded parts (23, 24) form a cage accommodating the pins (18, 19).
7. Baustoffmischer nach einem der Ansprüche 1 bis 6 7. building material mixer according to one of claims 1 to 6
dadurch gekennzeichnet,  characterized,
dass der die Schaufeln (12) tragende Bolzen (27) rechtwinklig zur Achse verläuft und mit dem Käfig kraftschlüssig verbunden ist.  in that the bolt (27) carrying the blades (12) is perpendicular to the axis and frictionally connected to the cage.
8. Baustoffmischer nach einem der Ansprüche 4 bis 7, 8. building material mixer according to one of claims 4 to 7,
dadurch gekennzeichnet,  characterized,
dass das freie Ende des Bolzens (27) mit einem Spannkörper (31 ), z. B. Exzenter oder Mutter, versehen ist, der dazu geeignet ist, die Teile des Käfigs miteinander kraftschlüssig zu verbinden.  that the free end of the bolt (27) with a clamping body (31), z. B. eccentric or nut, is provided which is adapted to non-positively connect the parts of the cage.
9. Baustoffmischer nach Anspruch 8, 9. building material mixer according to claim 8,
dadurch gekennzeichnet,  characterized,
dass der Spannkörper (31 ) mit einem Hohlkörper (30) werkstofffrei abdeckbar ist. that the clamping body (31) with a hollow body (30) can be covered without material.
0. Baustoffmischer nach Anspruch 9, 0. building material mixer according to claim 9,
dadurch gekennzeichnet,  characterized,
dass der Hohlkörper (30) nach Art einer Dose mit Deckel (32) ausgebildet ist.  that the hollow body (30) is designed in the manner of a can with a lid (32).
1. Mischarm für Baustoffmischer nach einem der Ansprüche 1 bis 10, 1. mixing arm for building material mixer according to one of claims 1 to 10,
gekennzeichnet durch  marked by
ein Innenteil (11) sowie ein Außenteil (13), die miteinander durch Steck- oder Rastverbindungen betriebsgemäß verbindbar sind.  an inner part (11) and an outer part (13), which are operatively connected to one another by plug-in or latching connections.
2. Verfahren zur Durchführung des Ersatzes von Schaufeln bei Baustoffmischern nach Anspruch 1 , 2. A method for carrying out the replacement of blades in building material mixers according to claim 1,
dadurch gekennzeichnet,  characterized,
dass die kraftschlüssige Verbindung zwischen dem Spannkörper (31) und dem Bolzen (27) gelöst wird, danach das Außenteil (13) mit der verschlissenen Schaufel (12) entfernt wird und schließlich ein neues Außenteil (13) mit einer Schaufel (12) auf das Innenteil (11) aufgesteckt wird.  that the frictional connection between the clamping body (31) and the bolt (27) is released, then the outer part (13) is removed with the worn blade (12) and finally a new outer part (13) with a blade (12) on the Inner part (11) is plugged.
EP17798163.6A 2017-11-02 2017-11-02 Construction material mixer Active EP3675992B1 (en)

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US20200254402A1 (en) 2020-08-13
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CN111315471A (en) 2020-06-19

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