DE2137099A1 - Device for making ice cream - Google Patents

Description

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Charles A M R H E I Ii, Ostwald (Hiederrhein), Prankreich,

Device for making ice cream

(Addition to patent (patent application

P 18 08 986.6)

The invention relates to a device for the preparation of ice cream with several, each equipped with a stirrer blade Fanning in which the agitator blades are driven by a common drive motor via a reduction gear and a "with Clutches separating under a certain load are driven, according to patent ..... <,., ...... (patent application P 18 08 986.6).

The main application is concerned with a device for the preparation of ice cream with several compartments in one bearing housing are arranged side by side and covered by a cover supported on the housing can be. In every subject. vertical standing

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• impeller from top to bottom, the one with the rest of a drive device set in rotary motion yard. The drive device is acted upon by an electric motor. Each impeller is a drive element assigned for its individual drive and each impeller is provided with a friction clutch through which the The impeller can be uncoupled when the ice that is being formed solidifies in the separate compartment Has. ·

The object of the present invention is to improve the device according to the main application, in particular it to be trained so that the electric motor is protected. This task is based on the knowledge that after solidification of the ice cream, through which the agitator blades are stopped, the friction clutch between the drive connection the drive device and the agitator blades or an agitator blade interrupts, however, that the electric motor remains under voltage and continues to run, which can result in inadmissible heating of the motor. It it is therefore necessary to shut down the motor manually. However, this requires the status to be monitored of the ice cream by the operator from time to time. The device can thus practically only in In the presence of an operator.

The present invention solves the problem posed in that the coupling is a spring-loaded tooth coupling is formed and one on the agitator shaft of each agitator blade displaceable, having a toothing Includes sliding piece which, under spring load, engages with counter teeth of a hub of a gear

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and that when it is shifted one of each normally closed contacts assigned to an agitator blade and lying parallel to one another, so that the drive motor is switched off when the last contact is opened.

The present invention thus automatically stops the motor when the ice cream has solidified and has also slowed down the rotary movement of the last impeller. The individual, assigned to each propeller Switches are in the supply circuit of the drive motor.

Further advantages and features of the present invention emerge more preferably from the following description Embodiments based on the accompanying drawings as well as from further subclaims.

Show it:

Pig. 1 is a schematic plan view of a device according to the invention for making ice cream with multiple tenants;

Pig. 2 shows a schematic plan view of a device according to the invention which differs from the embodiment according to Pig.1;

Pig. 3 shows a vertical section along the line III-III in Pig. 1, and

Pig. 4 a vertical section through a drive direction for an agitator blade, which is connected to a Strand setup for power interruption is.

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According to the illustration in Fig. 1, an ice making device 1 consists essentially of a housing 2 in which several spaces 3, 4 are provided, which serve as compartments for receiving the liquid from which the ice is to be made. In the exemplary embodiment shown, the compartments 2 and 4 are arranged in mutually identical alignment; however, it goes without saying that these compartments can also be arranged in any other way. For example, a circular housing could be provided in which the compartments are concentric to its central axis. According to a modified embodiment shown in FIG. 3, the housing can essentially comprise a single compartment 5, which _{is subdivided by partition walls 10 r} 11 into several quadrangular sub-compartments 6, 7, 8 and 9 ', the edges 12, 13 of the partition walls in Grooves 14 of the vertical side walls of the compartment 5 are inserted.

In each compartment obtained in this way is an impeller 15 arranged, which consists essentially of a vertical, for example, a rectangular blade which is attached to an agitator shaft 17. This agitator shaft contains the central axis of the impeller 15 and lies in a vertical plane. The thickness of the impeller 15 is arbitrary. In any case, its length or horizontal dimension is slightly smaller than the diameter of the compartment, if this is circular like the compartments 3 »4 in FIG. In the case of the application of subjects 6, 7, 8 and 9 in the Overall compartment 5 according to FIG. 3, the impeller 15 describes an inscribed circle in a rectangular compartment cross-section .

The individual agitator blades 15 are carried by a cover 18, whose peripheral surface is the outer surface of the housing

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covered. The lid 18 can be easily lifted to the To facilitate access to the individual types of ice cream in the various compartments. The lid also carries a drive device by which the individual rotation of each agitator blade 15 is caused.

The drive device is preferably actuated by an electric motor 19. However, this could e.g. replaced by a mechanical spring-driven motor. A drive pinion 21 is seated on the shaft 20 of the electric motor 19 and is connected to a shaft 23 with a gear 22 combs, the ends of which are held in recesses of the cover 18 provided for this purpose. On the same wave a pinion 24 is concentrically arranged, which is in engagement with a gear 25, which in turn is on the upper End of the agitator shaft 17 of each impeller 15 is mounted. Through the gear chain 21 to 25, the speed of rotation the agitator 15 can be lowered to avoid that these rotate too quickly despite a relatively high speed of the electric motor 19. The one from gear 22, the drive device consisting of the shaft 23, the pinion 24 and the gear 25 is provided for each agitator blade, all of the gears 22 being driven by the same drive pinion 21 fastened to the motor shaft 20 of the electric motor 19 are driven.

According to the number of individual subjects 3, 4 or 6, 7 » 8 and 9, ice cream with different tastes can be produced in one and the same device. It appears but often that due to the composition of the cream or the Grame j di © au ice cream is to be processed, the consistency of the individual types of ice cream is not maintained "

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.,Right. It follows that one or the other of the used Types of cream solidify more rapidly than the rest. The resulting solid egg keeps the rotating movement of the Agitator 15, while the remaining agitator 15 must continue to rotate until in the other compartments the starting product has turned into ice. For this reason, the agitator blade 15 is a friction clutch on each agitator shaft 17 26 is provided so that the gear 25 can rotate relative to the agitator shaft 17 without taking it along when the ice cream has too high ¥ / resistance.

The friction clutch 26 consists essentially of two elements 27 and 28. The lower clutch element 28 is firmly connected to the gear 25, while the upper clutch element 27 is arranged displaceably along the upper end of the agitator shaft 17. The lower coupling element 28 has a toothing 29 on its upper side, which corresponds to a corresponding toothing 29 ′ on the lower side of the upper coupling element 27. During normal operation, the two toothings 29 and 29 'mesh with one another, so that the rotation of the gear wheel 25 is transmitted to the agitator blade 15 via the agitator shaft 17. Since the toothing or 29 'has only a slight depth, the two toothings begin to slide on one another if the resistance to the rotational movement due to the resulting ice becomes too great. TJM the vertical displacement of the upper coupling element 27 on the shaft 17 together with its rotary movement to ensure is provided a fixed on the coupling element 27 the wedge 30 is OCE arranged in a Abfla ~ chung 31 in End® the stirring shaft 17 (Figure 1).

The obsre coupling element 27 is held against the lower coupling element 28 cliirsh bins feeler 32 in ils.Iag-s, the

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see between the top 33 of the coupling element · 27 and the bottom 34 one at the top of the agitator shaft T7 provided widening 35 is supported. A neck bearing 36, which is on the Eührwelle 17 near the bottom of the gear 25 is arranged, allows the rotation of the ' Agitator shaft 17 · A cover element 37 serves on the one hand to hold the neck bearing · 36 and the agitator shaft 17 and prevents on the other hand, every penetration of liquid into the lid space that encloses the drive device.

The Eührflugis is propelled in the following way:

The drive pinion 21 is turned into Rotation offset, which in turn drives each gear 22. The gear 22 drives the pinion 24 with the Gear 25 meshes. This gear, which is freely rotatably mounted on the agitator shaft 17, causes the rotation of the lower coupling element 28. When the in the compartment If the liquid does not cause any great resistance to rotation, then the toothing 29 of the lower coupling element engages 28 into the corresponding toothing 29 * of the upper coupling element 27, which thereby causes the rotation the agitator shaft 17 causes. This also causes the rotation of the impeller 15. The resistance of the resulting If the ice is too big, the gear 25 continues to rotate, but the coupling element 27 slides on the Xupplungselement 28, whereby the agitator shaft 17 no longer is driven and the gear 25 rotates freely relative to the agitator shaft. The electric motor 19 continues to run and can Drive the remaining agitator blades without undue heating until ice of a solid consistency is also in the other compartments has formed (Figure 3) · ·

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FIG. 4 shows an embodiment in which a current interruption device is provided. According to this embodiment, the lower end wall 38 carries the lid 18 a projection 39 ffii ^ an opening provided therein 40. The property or the neck bearing runs in this opening 40 41 of the gear wheel 25. The hub 41 of the gear wheel 25 itself has an opening 42 into which the agitator shaft 17 is inserted is, which carries the impeller 15 at its lower end. In its lower area is the agitator shaft 17 with a shoulder 43 is provided on which the lower edge 44 of the gear 25 rests. On the underside 45 of this shoulder 43 the cover element 37 is supported. In the area of the gear 25, the shaft 46 of the agitator shaft 17 is cylindrical shaped. The outer shaft diameter is slightly smaller than that of the opening 42 of the hat 41, so that the. Gear 25 can rotate freely around the agitator shaft 17.

In its upper area, the agitator shaft 17 has a section 47 with a hexagonal cross-section. On this hexagon 47 is a sliding piece 48 with a central hexagonal hole attached. The sliding piece 48 can so in a vertical Slide in the direction of the agitator shaft 17, but is non-rotatably connected to it * Its vertical movement according to is limited at the top by a washer 49 which is fastened to the upper end of the stirring v ^ elle 17 by a screw 50 screwed into a threaded hole 51.

A spring 32 _s, which is clamped between the underside of the disc 49 and the sliding piece 48, presses the latter constantly against the upper side 52 of the hub 41 of the gear 25 so / ie on a shoulder 53 of the Rührx ^ elle 17, which is at the transition of the cylindrical shaft 46 to Seehslcantab-

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.schnitt 47 is formed. The underside 54 of the sliding piece 48 has a toothing 55 which meshes with a toothing 56 in the top 52 of the hub 41 of the gearwheel. The sliding piece 48 also has a protruding edge 57 on which one of the ends 58 of a contact lamella 59 rests. The contact lamella 59 is movable and is supported during normal operation on a fixed lower contact lamella 60. Both lamellae 59 and 60 form the contacts a switch 61 _- which is thus normally closed "- All switches 61, which are assigned to the individual agitator blades 15, are connected in parallel to one another in the circuit of the electric motor 19" In the event that ice of a more solid consistency is formed in a pach, rise the impeller 15 and the agitator shaft 17 by the Pestwerden of ice at "" the Schiebestüok 48 which rests on the shoulder 53 of the Rührwell © 17 ₃ is excavated by blocking with its Terzahnung 55 from the corresponding teeth 56 of the gear 25 and the gear 25 continues to run, without taking the agitator shaft 17 with it. By lifting the sliding piece 48, however, the movable contact blade 59 is also lifted and the current flowing through the switch 61 is interrupted by its opening. maintained -whose operation »When the last impeller vfird 15 inoperative ₅ <l _o h _e thereby the Ie is opened ta te switch 61 'is cLi® upstream clock zn. the electric motor 19' is interrupted and this thus automatically stopped,"

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slight play is provided between these two, the a lifting movement of the sliding piece 48 is used up immediately will.

Claims (2)

Claims Ί. device for making ice cream with several, - compartments each equipped with a propeller the agitator blades from a common drive motor via a reduction gear and one with certain Load separating clutch are driven, according to patent (patent application P 18 08 986.6), characterized in that the coupling is designed as a spring-loaded tooth coupling and comprises a sliding piece (48) which is displaceable on the agitator shaft (17) of each agitator blade (15) and has a toothing (55), which under Peder load with a counter-toothing (56) a hub (4-1) of a gear wheel (25) is in engagement and which, when it is moved, opens a normally closed KontakiEo (61) assigned to one of the agitator blades (15) and lying parallel to one another, so that when the last contact ( 61) the drive motor (19) is switched off « 2. Device according to claim 1, characterized in that that the contacts (61) each have a fixed lamella = Ie (60) and a movable blade (59) comprise, of which the movable lamella (59) is supported with its end (58) on the sliding piece (48). 3 ο Device according to claim 1 or 2 _9, characterized in that the sliding piece (48) is pushed onto a hexagon (47) of the agitator shaft (17) so that it can be axially displaced, but is non-rotating « 109887/1 Device according to one or more of Claims to 3, characterized in that the sliding piece (48) and the associated surface of the hub (41) have radial teeth (55 or 56) on the face. 109887/1238 Lee rs e tie