JPS6140343Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stirring device. For example, when a stirring device is installed in a tank used for producing milk, dairy products, beverages, or other food products, parts such as bearings that may contaminate the tank should be removed as much as possible, and cleaning and sterilization should be avoided. A stirring device is required that has a structure that eliminates as much as possible the parts and areas that cannot be washed inside the tank.

However, conventional stirring devices used in tanks and the like are provided with a bearing or a steadying member at the lower end of the stirring shaft in order to stop the stirring shaft from swinging due to fluid resistance during stirring. Therefore, with conventional agitation devices, there is a risk that the inside of the tank may be contaminated by the bearings inside the tank, and when cleaning the inside of the tank, the bearings and other parts may not be sufficiently cleaned, which can lead to the generation of bacteria. It has some drawbacks that are a contributing factor.

The present invention provides a stirring device that eliminates the above-mentioned drawbacks, and includes a stirring shaft having a stirring blade having a tapered portion formed at the upper end thereof, and the tapered portion being rotatably supported within a bearing housing via a bearing. Insert into the tapered hole of the intermediate shaft that is rotationally driven by the motor and taper fit it, and at the same time, a stirring shaft mounting pedestal is provided upwardly protruding from the upper wall of the tank to prevent the lower end of the intermediate shaft from sinking into the agitated material in the tank. This prevents contamination inside the tank.

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a partially cutaway front view of a tank equipped with the stirring device of the present invention, and FIG. 2 is an enlarged sectional view of the main part of FIG. 1.

Reference numeral 1 designates a stirring shaft inserted into a tank 2, which has a stirring blade 3 at its lower end and a tapered portion 4 at its upper end.

Reference numeral 5 denotes an intermediate shaft, which is rotatably supported via bearings 8 and 9 in a bearing housing 7 fixed on a stirring device mounting pedestal 6 projecting upward from the upper wall of the tank 2, and has a flange at its upper end. 10, and a bolt head insertion recess 11 and a bolt thread insertion hole 12 from the upper end surface to the lower end surface in the axial direction of the intermediate shaft 5.
A tapered hole 13 that widens toward the tip is continuously formed, and its lower end is located within the pedestal 6.

The tapered portion 4 of the stirring shaft 1 is connected to the intermediate shaft 5.
The tightening bolt 14 is inserted into the tapered hole 13 of the stirring shaft 1 and taper-fitted, and then the tightening bolt 14 is inserted through the bolt threaded part insertion hole 12 of the intermediate shaft 5 and screwed into the screw hole formed on the upper end surface of the tapered part 4 of the stirring shaft 1. The intermediate shaft 5 and the stirring shaft 1 are fastened together by inserting the fastening pin 15 into the side through-holes provided in the intermediate shaft 5 and the stirring shaft 1, respectively, at the lower end of the intermediate shaft 5. Relative rotation of the stirring shaft 1 is prevented.

16 is a deceleration motor mounted on a motor stand 17 (18 is a window) mounted on the upper part of the bearing housing 7, and the flange of a joint 20 fixed to the rotating shaft 19 of the motor 16 and the flange 10 on the upper end of the intermediate shaft 5
The rotation of the rotary shaft 19 of the deceleration motor 16 is transmitted to the intermediate shaft 5 and the stirring shaft 1, and the stirring blades 3 are rotated to perform stirring.

As explained above, in the present invention, the stirring shaft is taper-fitted and fixed to the intermediate shaft, and the intermediate shaft, which is rotationally driven by the motor, is rotatably supported in the housing via a bearing. can perform smooth stirring without shaking. The lower end of the intermediate shaft into which the stirring shaft was inserted and fitted was located within the stirring shaft mounting pedestal that protruded upward from the upper wall of the tank. Because only the stirring shaft is inserted into the material to be stirred in the tank, the material to be stirred in the tank will not be contaminated by the stirring shaft attachment structure during stirring. Furthermore, even with the agitation device attached, there is no part of the tank where cleaning does not reach, so the inside of the tank can be thoroughly cleaned, which has an extremely excellent effect of eliminating the causes of bacterial growth.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a tank equipped with the stirring device of the present invention, and FIG. 2 is an enlarged sectional view of the main part of FIG. 1. DESCRIPTION OF SYMBOLS 1... Stirring shaft, 3... Stirring blade, 4... Taper part, 5... Intermediate shaft, 7... Bearing housing, 8,
9...Bearing, 13...Tapered hole, 14...Tightening bolt, 15...Tightening pin, 16...Motor.

Claims (1)

[Scope of utility model registration request] A stirring shaft mounting pedestal is installed on the upper wall of the tank and protrudes upward.
A bearing housing is installed on the pedestal, a deceleration motor is provided on the housing via a motor mount,
An intermediate shaft that is connected to the lower end of the drive shaft of the motor via a joint and whose lower end is located within the stirring shaft mounting pedestal is rotatably supported within the bearing housing. Drilling a tapered hole into which a tapered part formed at the upper end of the stirring shaft is inserted and fitted from below, and a bolt thread part insertion hole for fitting and tightening the stirring shaft into the upper end surface of the tapered hole,
A fastening bolt inserted into the insertion hole is screwed into a screw hole drilled in the upper end surface of the stirring shaft, and a fastening pin is press-fitted into a side through-hole formed through each of the intermediate shaft and the stirring shaft. Stirring device with both shafts inserted and fixed.