FR2788935A1 - Transmission mechanism for kneading machine has single fixed reduction motor rotating vessel and kneading tool within vessel - Google Patents

Abstract

A transmission mechanism for a kneading machine has a reduction motor fixed on a head. The motor rotates a vessel and also rotates an oblique axle fitted with kneading arm that enters the rotating vessel. Mounted in a casing for the motor is a connection between a first output shaft of the motor and the tool shaft. It has a machined support with an integral bearing and self lubricating ring. A second output shaft from the opposite end of the motor drives the vessel via pulleys located within the casing. The vessel is mounted on a bearing and held by an upper guide.

Description

The present invention relates to a device for transmitting an arm of

  oblique axis kneader; two tank drive systems with adjustable speed from the tool motorization; a blockage of the head;

  and a dust sprayer.

  There are transmission devices on rotating bowl mixers, with a tool with a rotating oblique axis, penetrating a part

of the tank.

  For the kneader arm, the speed reducers on these machines are traditionally specially manufactured, due to the jerky radial forces on the slow shaft supporting the rotary floating tool with two or

three branches.

  In kneaders known as oblique kneaders with a free bowl, minimum working range at a moderate price, the rotation of the bowl is not ensured mechanically; it is braked by adjustment. Therefore, the tank is entrained by the friction of the dough on the outer wall thereof by the rotation of the tool. These devices require monitoring with

  brake adjustment according to the changing consistency of the dough.

  In mixers with a large working range, the tank is driven: either by an independent gearmotor assembly; which leads to an increase in the cost price. One can also obtain a mechanical drive by means of a gear and a roller, as described in patent N 21 6836 of 03/26/86; in this case it is impossible to

  differentiate the speed ratio between tank / tool rotations.

  There are tanks of a circular shape, whose rising, slightly frustoconical outer wall is open in the upper part and whose bottom in semi-spherical crown has a central part, with vertical axis. In this part, two bearings are placed at the ends of a static shaft which ensure the radial retention and the rotation of the tank. In quality mixers, the head / tool assembly can be lifted by assisted tilting, in order to facilitate access to the tank. In the working position, an effective blocking is essential, specific as described in the publication patent N0 O 329 548, filed on 02/14/89 with the N:

894004412.6.

  The liquids are poured into the tank, through a flexible pipe or through a container. This does not facilitate the premix between flour and water. In addition, due to the volatile flour dust, during these - 2 -

  links called frasage phase, a slow speed is necessary.

  To do this, the spiral and oblique mixers are equipped with two speeds. The first device according to the invention makes it possible to use commercially available reducers with wide circulation; to be able to fix the standard transmission assembly with a specific radial reinforcement on the framework of the head, for example boilermaking. The reinforcement assembly includes: a machined part, a combined bearing and or a self-lubricating ring;

  possibly a reinforcement joint.

  The second device according to the invention consists in using a reducer with a hollow shaft passing through or with two outlets and using the low outlet with an oblique axis to actuate the kneading tool in rotation (mixing arm) and the other outlet, for example with oblique axis for the

  transmission of tank training.

  At the top output of the gearbox, a rotary shaft can be mounted: either a stepped pulley having several grooves of different

  diameters; or a pinion chain leading to several diameters.

  A second pulley or pinion driven with inverted stages, allows, either

  by means of a belt or chain, to drive a rotating shaft.

  Depending on the location of the belt or chain in the grooves, the speed of the shaft is different and allows adjustment of the tank speed according to the choice of the professional. For example, such a device

  speed control is often placed on drill presses.

  A reverse gimbal, or two gears allow the roller axis to be returned to the vertical. The roller lined with an elastomeric material, pressing on the outer wall of the tank and its rotation-ensures that of

tank.

  The third device according to the invention is a variant of the second device using the rear engine axis with, for example, a clearance

  multi-stage pulleys or pinions of several diameters, a reduction gear and a roller.

  The fourth device according to the invention is a simplification of the rolling mechanism of the rotation of the tank in its central part by

  a single combined bearing placed in the lower part with a tank guide in the upper part in self-lubricating material.

  -3 - The fifth device according to the invention allows for the blocking of the head / tilting tool assembly; in the kneading position, to use a commercially available lever cylinder with wide distribution, fixed for example on one of the

  sides of the head, by tightening or engaging the piston in the frame.

  The sixth device according to the invention is to use one or more liquid sprayers, oriented on the kneading arm and fixed for example, on the support arm / bowl guide, in order to facilitate the

  water / flour connections and have an anti-dust effect.

  The liquid inlet to the nozzles can be placed in several places: head, inside the tubular safety screen, on the side of the tank, being connected or not to the nose of the frame or independently above the tank . The seventh device according to the invention consists in using the tubular feet of the kneader / mixer to incorporate a massive ball therein per foot in order to make the device mobile and to comply with safety standards and

  in the event of a ball defect, the machine will remain stable.

  The eighth device according to the invention is a variant of the fifth device replacing the jack by a commercially available lever lever with wide distribution, fixed for example, on one of the sides of the head, by

  tightening or engaging the piston in the frame.

  The accompanying drawings illustrate the invention:

  Figure 1 shows in section, the devices of the invention.

  Figure 2 shows in section, an additional device.

  Figure 3 shows a variant of these devices

  FIG. 4 represents a detailed device of the invention.

  FIG. 5 represents a variant of this detailed device.

  With reference to these drawings, the first and second devices comprise a set of diffusion gearmotors (1 and 19) with two outputs with an oblique axis (2 and 3), the bottom outlet of which also includes a set of radial reinforcement and specific sealing (5,6 and 7) fixed on the reducer (1). This assembly fixed on the head (8) is intended for

  ensure the rotation of the kneading arm.

  At the high outlet (3) is fixed a first driving pulley (9) and on another oblique shaft (13), is placed a second pulley (10) with a combined bearing (34). Depending on the position of the belt (11), the shaft (13) has a different speed of rotation from the same speed of the tool shaft. In the lower part of the shaft (13) is arranged a first gear -4 -

  tapered at 45 (15), kept in rotation by a combined bearing (32).

  A second bevel gear (14) is mounted with a combined bearing (33) on a third vertical shaft (16), on which is finally fixed a roller (17) filled with an elastomeric material resting on the outer edge of the tank (12). This mechanical assembly is intended to ensure the rotation of the tank, with the possibility of adjusting the rotation speed in

  having an influence on the instantaneous kneading energy.

  The third device of the invention comprises, as a variant of the second, a rear motor shaft (18) which can serve as a basis for the drive system of the tank (12) instead of using the second outlet (3) of the reducer (1) . In this case of realization, it will be advisable in addition to the two pulleys, belt and roller to add a small reducer to 90 in place of the bevel gears. This device can also ensure the

  adjustable speed transmission from the tank.

  The fourth device according to the invention comprises a single combined bearing (20) placed in the lower central part of the tank, embedded in the pivot of the tank, itself fixed on the nose of the frame (30). In the upper central part, the tank is capped by a tank guide (21), itself fixed under the support arm (27 This device allows free rotation and the

holding the tank in its center.

  The fifth device according to the invention comprises a set of distribution lever actuator (22), fixed on one of the sides of the head (8). By moving the lever, depending on its position, the stroke of the piston allows the rod to be engaged in the frame (23) and or at the end of the stroke a tightening. This device blocks the head / tool assembly

  tilting in working position during kneading.

  The sixth device according to the invention comprises one or more spray nozzles (25) of liquid in fine droplets fixed on the head (8), above the rotating tool (4) and the tank (12); this device is intended to improve the frasage phase (bonding of powder and liquids) and to have an anti-dust effect

beneficial for health.

  The seventh device according to the invention comprises the positioning in the tubular feet of the machine1 of massive carrier balls (29) on mini bearing / mini balls, intended to make the machine easily

  mobile with stability even in the event of deterioration of a carrier ball.

  The eighth device according to the invention, as a variant of the fifth device, comprises a set of lever plunger (24) for distribution fixed to one of the sides of the head (8). By moving the lever, depending on its position, the piston is engaged and tightened in the frame (23). This device blocks the head / tool assembly

  tilting during the frasage / kneading phases.

Claims (11)

  1 - Transmission device for kneader-mixer, with rotary tool, more particularly a kneading arm, with oblique axis (4, 31), penetrating into a part of a tank (12) itself driven in rotation, characterized in what it includes a motor-reduction unit (1, 19) with output with oblique axis (2, 3), fixed on a head (8) with locking system, this motor-reduction unit ensuring the rotation drive of the tool (4, 31) and also the rotation drive of the tank (12) at speed adjustable.   2 - Device according to claim 1, characterized in that on the reduction gear (1), the output of the slow shaft (2) tool holder (4) comprises a radial reinforcement assembly comprising: a machined support part (5) having a combined bearing (6), a self-lubricating seal ring (7), the whole   being fixed to the reducer (1) and inside the head (8) of the kneader.   3 - Device according to claim 1, characterized in that the reduction gear (1) comprises an oblique shaft with two opposite outlets (2, 3), one (2) coupled to the tool (4, 31) and the another (3) carrying a first pulley (9) with several grooves of different diameters, connected by a belt (11) to a second pulley (10) with several grooves of different diameters, fixed on another oblique shaft (13), which itself drives a roller (17) bearing on the outside edge of the cellar (12), the arrangement of the belt (11)   to change the drive speed of the tank (12).   4 - Device according to claim 3, characterized in that the oblique shaft (13) of the second pulley (10) drives, by a reverse gimbal or by two gears (14 and 15), a vertical shaft (16 )   on which is fixed the roller (17) for driving the tank (12).   - Device according to claim 1, characterized in that the drive transmission of the tank (12) is done from the axis (18) rear of the engine (19).   6 - Device according to claim 1, characterized in that the rotation of the tank (12) is ensured by a single combined bearing (20) and by an upper guide (21).   7 - Device according to claim 1, characterized in that the head blocking system (8) is provided in the frame (23) by a cylinder distribution lever (22).   8 - Device according to claim 1 characterized in that a sprayer (25) of liquid is provided for spraying fine droplets of liquid under pressure above the kneading arm (31) in the tank (12).   9 - Device according to claim 8, characterized in that a liquid inlet by pipeline (26) passes through the head (8) and that the spray nozzle (s) (25) are fixed to the head (8), to a support arm   central (27) tank guide or to a safety screen (28).   - Device according to claim 8 or 9, characterized in that the liquid supply is ensured by a hollow part located on the side of the tank (12) and fixed on the nose (30) of the frame (23) or by the tubular safety screen comprising one or more spray nozzles (25).   11 - Device according to any one of claims 8 to   10, characterized in that the spray nozzles (25) are orientable and adjustable. 12 - Device according to claim 1, characterized in that a massive ball (19) incorporated into each foot ensures the mobility of the kneader-mixer. 13 - Device according to claim 4, characterized in that the maintenance of the gear (14) on the vertical shaft (16) is provided by a single combined bearing (33).   14 - Device according to claim 4 or 13, characterized in that the maintenance of the gear (15) on the oblique shaft (13) is ensured by a single combined bearing (32).   - Device according to any one of claims 4, 13   and 14, characterized in that the holding of the second pulley (10) is   provided by a single combined bearing (34).   16 - Device according to claim 1 characterized in that the head blocking system (8) is provided in the frame (23) by a pusher lever (24) distribution.