JPS5925465Y2 - Fixing device for stirring blades in stirrer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for fixing stirring blades to the stirring shaft of a stirrer.

As shown in FIG. 1, a conventional stirring blade fixing device generally involves providing a tap hole in the boss of the stirring blade, screwing a set screw into the hole, and fixing the tap hole in a receiving hole drilled in the stirring shaft.

However, with this method, the stirring blade cannot be fixed at an arbitrary position.

Even if some receptacle is provided in the stirring shaft, its position is limited.

Furthermore, when fixing only with the tip of the set screw without providing a receiving part, the fixing force becomes uncertain and there are drawbacks such as the possibility of the stirring blade falling off.

The object of the present invention is to eliminate such drawbacks and to fix the stirring blade easily and reliably at any position on the stirring shaft.

The present invention will be explained below based on the embodiments shown in FIGS. 2 and 3.

In the figure, 1 is a stirring blade, 2 is a stirring shaft, and 3 is a cross section of a boss.

Reference numeral 4 denotes an elastic cylindrical ring (hereinafter referred to as the ring) fitted around the outer periphery of the stirring shaft and inside the boss, and both ends of which are tapered into a conical shape, and a part of the side surface has a longitudinal direction. It has a notch a.

(See FIG. 3) The inner diameter of the ring 4 is the same as the diameter of the stirring shaft.

The hole in the boss 3 is formed by a female thread part b, a ring insertion part C, a conical tapered bottom d that matches one tapered end of the ring, and a stirring shaft hole e.

5 is a male threaded sleeve, the inner diameter F of which passes through the stirring shaft, and the male thread g screwed into the female thread b of the boss 3.

The end of the sleeve 5 has a conical taper to match one tapered end of the ring.

i is a hexagonal nut or other convenient shape for tightening.

Now, as shown in FIG. 2, the ring 4 is inserted into the hole of the boss 3, the male threaded sleeve 5 is screwed in, and this is inserted into the stirring shaft 2.

When tightening the male threaded sleeve 5 at any position on the stirring shaft, the ring 4 receives a force as shown by the arrow Z on the tapered portions at both ends of the ring 4, and its horizontal component X closes the notch a. This creates a strong frictional force between the stirring blade and the stirring shaft surface, thereby fixing the stirring blade.

When loosening the male threaded sleeve 5, the force Z disappears, and the ring 4 opens the notch a due to its elasticity, while the frictional force with the stirring shaft surface also disappears, and the stirring blade is slid to any other position. It can be fixed or removed in a similar manner.

According to the present invention, the stirring blade can be securely fixed to the shaft with a simple structure, and it can be fixed at any position on the shaft.Moreover, since the shaft does not need to be perforated, the strength of the shaft is not impaired. It has the following advantages.

[Brief explanation of drawings]

Figure 1 is a known explanatory diagram, Figure 2 is an explanatory diagram of the present invention, and Figure 3 is an explanatory diagram of the present invention.
The figure shows a detailed view of the ring. 1... Stirring blade, 2... Stirring shaft, 3...
...Boss, 4...Ring, 5...
sleeve.

Claims (1)

[Scope of utility model registration request] Inside the boss hole of the stirring blade in the stirrer, there is an elastic material that has an inner diameter that is almost the same as the diameter of the stirring shaft, has a conical taper at both ends, and has a vertical notch in a part of the side surface. Insert the cylindrical ring so that one end contacts a portion of the conical taper at the bottom of the boss hole, and the other end contacts one end of the conical taper of the male threaded sleeve that fits into the female thread at the top of the boss hole. Features: A fixing device for stirring blades in an agitator.