JPS5918574B2 - Torque distribution device for twin-screw extruders, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a torque distribution device in a twin-screw extruder or the like.

First about the torque distribution device in the conventional twin screw extruder
To explain based on the figure, reference numerals 1 and 2 are two screw shafts, gears 3.4 are fixed to both shafts 1t2Vc, and the gears 3.4 mesh with each other.

5 is an input shaft, and the rotational force of this shaft 5 is transmitted to the gear 6 fixed to the shaft 5, the intermediate gears 7 to 12, and the gears 3,
4 to both the screw shafts 1 and 2.

In a twin-screw extruder, the distance K between the two screw shafts is first determined for design reasons such as the need to determine the depth of the screw grooves depending on the characteristics of the material to be processed and the amount to be processed.

Therefore, in the above-mentioned conventional torque distributor, there is less room to select an arbitrary module and number of teeth of the output stage gear.

There was a limit to the torque that could be transmitted, which limited the extruder's capacity.

Therefore, the present invention provides a torque distributor that can transmit arbitrary torque without being restricted by the spacing between two shafts.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

Reference numerals 13 and 14 denote screw drive shafts that are spline-fitted to the screw shafts 1 and 2, respectively, and these two shafts 13 and 14 are arranged parallel to each other in the horizontal direction, and a radial bearing 16 is attached to the fixed nozzle ring 15.
and is rotatably supported via a thrust bearing 1T.

Reference numeral 18 denotes a rotary plate disposed concentrically with a center line A passing between the two shafts 13 and 14 in parallel with the shafts 13 and 14, and connected to a drive motor (not shown). Reducer 19
A key 21 and a bolt 22 are fixed to a rotating shaft 20 of the rotary shaft 20 .

Reference numeral 23 denotes a pin fixed to a suitable position on the outer peripheral edge of the rotary plate 18, and this pin 23 is parallel to the center line A.

24 is a floating boss fixed on the pin 23 via a radial bearing 25, and the end face of this boss 24 facing the drive shaft 13.14 has a double drive shaft 13.14.
A pair of holes 26 and 27 are formed spaced apart by a distance between the holes 26 and 27.

Reference numerals 28 and 29 denote a pair of "<"-shaped levers, one end of which is fitted with a spline 30 to the end of the two-part moving shaft 13.14 and fastened with a bolt 31, and a pin 28a protruding from the other end. , 29a are fitted into both holes 26 and 27 of the floating boss 24 via radial bearings 32, respectively.

In the above configuration, when the drive motor is started, the rotating plate 18 is rotated via the reducer 19, and the floating boss 24 rotates around the center line A with a radius S, and both levers 2
8.29 is also turned, and both screw shafts 1, 2 are turned via the drive shaft 13.14.

By the way, in the above configuration, as shown in FIG. 3a, two screw shafts 1 and 2 and two bottles 2 in the floating boss 24
8a and 29a mutually constitute a parallelogram and rotate integrally in the direction of the arrow, but if there is a difference in the loads applied to both screw shafts 1 and 2, the floating boss 24 will be twisted. The force may work and it may be difficult to keep it level.

In particular, as shown in the figure, the screw shafts 1 and 2 and the bottle 28
When the a29a and the a29a are aligned on a single plane, the floating boss 24 tends to wobble.

In such a case, you can do as follows.

That is, as shown in FIG. 4, a fixed link 33 is provided along the vertical direction, and a movable link 34 is provided parallel to the link 33.
A pair of parallel connecting links 35 are provided between opposite ends of both links 33 and 34, a pair of brackets 36 are provided on the side surface of the floating boss 24 facing the movable link 34, and both brackets 36 are provided. Both holes 3 formed in
7 is parallel to the movable link 34, and a pair of parallel connecting links 38 are provided between the brackets 36 and both ends of the movable link 34 facing the brackets 36.

With this configuration, even when the screw shafts 1, 2 and the bins 28a, 29a are aligned on a single plane as shown in FIG. 35.38, there is no risk that the floating boss 24 will wobble.

In order to balance the rotation of the rotating plate 18, the thickness of the opposite side from the bottle 23 is increased.

As described above, according to the Kell torque distribution device for a twin-screw extruder or the like of the present invention, since the two shafts are rotated by levers, a large amount of transmitted torque can be obtained regardless of the spacing between the two shafts. However, even when the two shafts and the other ends of both levers are aligned on the same horizontal plane, there is no risk of the rotating body wobbling because the fixed link, movable link, and connecting link are on the vertical plane perpendicular to this horizontal plane. .

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing a conventional example, Figs. 2 to 4 show an embodiment of the present invention, Fig. 2 is a sectional view, and Fig. 3 is an asb
is an explanatory diagram of the operation, and FIG. 4 is a cross-sectional view taken along the line ■-IV in FIG. 2. 1.2... Screw shaft, 13, 14...
...Screw drive shaft, 18.. Quadruple rotation plate, 23.. Curved bottle, 24.. Floating host, 28, 29.. Curved lever, A... Center line, K... ...2 axes 1, 2
interval between.

Claims (1)

[Claims] 1. A rotary plate is provided opposite two mutually parallel axes to be rotated, and the axis of the rotary plate and a center line passing parallel to the two axes are set concentrically, and the rotation A rotating body is rotatably disposed at a suitable position on the outer periphery of the plate, and one end is connected to the above-mentioned 2
A pair of levers are provided, each of which is fixed to a shaft, and whose other ends are rotatably supported by the rotating body, separated by the distance between the two axes, and a fixed link extending in a vertical direction opposite to the rotating body is provided. A movable link parallel to the fixed link is provided between the fixed link and the rotating body, and a pair of connecting links are provided that rotatably connect the end portions of the fixed link and the movable link to each other and are parallel to each other. A pair of brackets is provided on the rotating body, a line connecting the holes of both brackets is made parallel to the movable link, and each bracket and the end of the movable link opposite to each bracket are rotatably connected and parallel to each other. A torque distribution device for a twin-screw extruder, etc., characterized by having a pair of connecting links.