SU567814A1 - Chain-type driving machanism - Google Patents

Description

(54) CHAIN MECHANISM OF RACING

one

The invention relates to the field of the mining industry, namely, to chain mechanisms for moving coal miners.

A chain transfer mechanism is known for mining machines with a lower arrangement of the branches of the draw chain, including two remote drives, driving and deflecting sprockets placed on machine i.

To protect the traction chain and drive overloads, the movement mechanism is equipped with additional supporting sprockets, which interact with the chain and are mounted on shafts, which are made integral with profile discs or cranks, the rotation of which is limited by spring-loaded rollers or hydraulic jacks.

However, the known movement mechanism is complicated in design, has increased dimensions and is less reliable due to the fact that it requires additional sprockets, which increase the number of chain bends under

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The closest to the described invention by the achieved result and technical essence is the mechanism for moving the coal-mining machine, including a hydraulic pump, hydraulic motors, load regulators, gears, two sprockets synchronously rotating from individual electric motors, and a guide chain & elements (2J.

The device works as follows.

The hydraulic motor associated with the first asterisk along the combine moves the torque to the asterisk, which in this case is leading. An asterisk, rolling around the chain, creates tractive effort in its working branch, providing re-combining of the combine.

The second hydraulic motor transmits the torque to a deflecting sprocket, which removes the chain links that run off from the drive star.

The synchronic rotation of the sprocket is ensured by the operation of the hydraulic motors from a single hydraulic pump.

The thrust force in the working branch of the chain and the force required to remove chain links escaping from the drive sprocket are ok5) are adjusted by load regulators on the respective shafts of the sprockets, which aE automatically switch depending on the direction of movement of the combine. Such a design of the movement mechanism eliminates chain overload associated with the closed circuit path.

The disadvantages of the known device are: the complexity of the design, the increased dimensions of the mechanism, the upper arrangement of one of the branches of the pulling chain, and the possibility of providing an equilibrium state of the chain links on the drive sprocket during the engagement process, resulting in additional wear of the chain of sprockets.

The purpose of the present invention is to provide a lower chain transfer between the asterisks and stabilization of the force in the chain links.

This goal is achieved by the fact that the cuspade device is made in the form of two spiral elements, the first of which is installed with the possibility of transferring the running branch of the chain from the plane of the leading starlet, and the second one into the deflecting plane.

The drawing shows a schematic diagram of the movement mechanism.

The chain transfer mechanism consists of gears 1–3, output shafts 4 and 5 with drive sprockets B and 7 rigidly mounted on shafts, a thrust chain 8 and spiral guiding elements 9 and 1 O.

The mechanism works as follows.

The output shaft 4 transmits the torque to the sprocket 6, which is leading. The asterisk 6, running around the chain 8 located near the soil of the reservoir, creates a pulling force in the working branch of the chain O, thus ensuring the movement of the tank with which speed Vtl. The asterisk 7 is in this case deflecting through gears 1-3 and the output shaft 5 draws the descending branch of the chain from the leading sprocket 6 along the spiral guide elements 9, 10 and again pulls the chain back to the soil With some force, into the idle branch Tsx.

Spiral guides 9 and 10 provide the lower transfer of the chain section between the sprockets from the plane of the drive sprocket to the deflecting plane in the presence of a gap between the ends of the sprockets and chain links. Change of direction of movement

between the asterisks is carried out practically without load.

When the direction of movement of the combine is changed, the functions of the drive gears 6 and 7 change accordingly. In this case, the mechanism works in a similar way.

The lower transfer of the chain between the star; the daughters in the presence of a gap between their ends and the links of the target ensures the stabilization of the ratio of efforts in the sprockets running from the drive sprocket and chain links incident on it (), which eliminates slipping of the links along the teeth profile

sprockets and increases the service life of the engagement elements.

The placement of the working and idle branches, the thi x x) chain on the soil of the reservoir improves ulo-. VIY service of the combine at its work also reduces the possibility of injuries of a chain in a face.

The use of the invention will make it possible to use sprockets with a higher number of teeth, as well as a chain of increased caliber, with the same dimensions of the movement mechanism, or to reduce the mechanism height with constant parameters of the chain and sprockets.

Claims (2)

1. Patent of Great Britain No. 1345262, cl. E 21 s 29/10, published. in 1974 2. Patent of Germany No. 976491, cl. E 21 from 27/34, published. in 1963