RU2301769C1 - Stretching device for conveyor pulling apparatus - Google Patents

Abstract

FIELD: conveyor building, in particular, stretching technique for pulling apparatus used in conveyor type transportation machines.

SUBSTANCE: stretching device has pulley movable in guides of supporting frame. Pulley is surrounded with pulling apparatus and connected with tie-rod provided with hollow screw and spring. Hollow screw is mounted on tie-rod and is cooperating with nut immovably fixed on supporting frame. Tie-rod is equipped with annular protrusion by means of which protrusion tie-rod cooperates with stepped retainer nut screwed into hollow stepped screw. Spring is placed within stepped hollow screw and contacts with its one end with said stepped retainer nut and with its other end - with guiding ring placed into inner cavity of hollow screw.

EFFECT: reduced sizes, simplified maintenance and prolonged service life of stretching device.

3 dwg

Description

The invention relates to the field of conveyor engineering and relates to tensioning devices used in transporting machines with a traction body.

The closest in technical essence and the achieved effect is a tensioner with large overall dimensions [SU 317584 A1, class. B65G 23/44, publ. 01/10/1972, Figs. 1-3, total 2 pages], containing a block movable in the guides of the support frame, enveloped by the traction member and connected to the traction provided with a screw and a spring, a hollow screw is installed on the traction, interacting with a nut fixed fixed to the supporting frame, and the thrust is made with an annular protrusion acting on the end face of the hollow screw.

The disadvantage of this design is that it has large overall dimensions and due to this drawback there is a problem of maintenance and installation of this device, as well as a short service life.

The technical task of the invention is to reduce the size of the tensioning device, simplifying its maintenance and increasing the service life.

The problem is achieved in that in the tensioner for the traction body of the conveyor, containing a block movable in the guides of the support frame, enveloped by the traction body and connected to the rod equipped with a hollow screw and spring, the hollow screw is mounted on the rod and interacts with a nut fixed fixed to the support frame, and the thrust is made with an annular protrusion, new is that the thrust annular protrusion interacts with a locking step nut, twisted into a hollow step screw, while the spring is placed inside hollow stepped screw and one end also in contact with the said retaining stepped nut, and the other with a guide ring placed in the internal cavity of the hollow screw.

The technical result consists in reducing the size of the tensioning device, simplifying its maintenance and increasing the service life.

Figure 1 shows the proposed tensioning device, General view; figure 2 is a section along aa in figure 1; figure 3 - traction part of the tensioner.

The tension device for the traction member comprises a block 2 movable in the guides of the support frame 1, enveloped by the traction member and connected to the traction 3. The block rotates around an axis 4 fixed in crackers 5 that move along the support frame. The rod is equipped with a spring 6, abutting against the locking step nut 7, which is screwed into the hollow step screw 8. The hollow step screw interacts with the nut 9 mounted on the support frame. The rod is made with an annular protrusion 10, interacting with the locking step nut 7. The compression ratio of the spring 6, abutting against the locking step nut 7 and the guide ring 11, is adjusted using the nut 12 and the lock nut 13. The rod acts on the block by means of a fork 14.

The tension device for the traction body of the conveyor operates as follows.

Before starting the transporting machine, it is necessary to tighten the traction unit. For this, the hollow step screw 8 moves along its axis and the stop step nut 7 abuts against the annular protrusion 10 of the rod 3, moving it.

The necessary initial tension of the traction body of the transporting machine is carried out only due to the force developed by the screw transmission of the tensioning device. Then, rotating the nut 12, compress the spring 6 to the calculated value and lock the nut 12 in this position with the nut 13.

In the process, the traction body of the machine is somewhat stretched. This tension is compensated by a compressed spring 8, which, when straightened, acts on the rod 3, connected with the block 2, tensioning the traction element of the transporting machine.

Using this tensioner will allow:

- significantly reduce the overall dimensions of the device by placing the spring inside the hollow screw;

- simplify the operation of the tensioner due to the simplicity of assembly and disassembly of the device;

- provide a constant tension of the traction body;

- reduce the cost of transporting materials by increasing the service life of the traction body of the conveyor.

Claims (1)

A tension device for a traction member of a conveyor, comprising a block movable in the guides of the support frame, enveloped by a traction member and connected to a rod provided with a hollow screw and spring, the hollow screw mounted on the rod and interacts with a nut fixed to the support frame, and the rod is made with an annular protrusion, characterized in that the thrust annular protrusion interacts with a locking step nut, twisted into a hollow step screw, while the spring is placed inside the hollow step screw and one end of that it is also in contact with the aforementioned lock nut, and the other with a guide ring placed in the internal cavity of the hollow screw.

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