SU396491A1 - CHAIN TRANSMISSION - Google Patents

Description

The invention relates to the field of application of chain drives in the working bodies of mechanisms and machines, for example, in test stands for automobiles.

Chain gears are known that contain a chain and transmit a pulling force to the chain, a drive mechanism made in the form of a bottom with axially movable teeth interacting with chain links and receiving axial movement from a non-moving copier. The drive teeth of the drive mechanism are engaged with chain links in such chain transmissions in the space between the connecting fingers of the chain.

The high speeds around the curvilinear sections of the trajectory of such chain transmissions cause considerable centrifugal forces and dynamic loads in the chain. The disk teeth do not prevent the chain links from breaking away from them in the radial direction, when centrifugal forces arise in the chain elements, which is why the additional loads arising in it increase the wear of the hinges and reduce the efficiency of the chain transfer.

The aim of the invention is to reduce the dynamic loads in the hinges of the chain.

This is achieved by the fact that at the ends of the connecting fingers of the chain there are working holes with which the engagement and interaction of the teeth of the drive mechanism is carried out. The mating surfaces of the teeth and the working holes are conical. Such engagement of the connecting fingers of the chain with an eub mn disk allows the latter to take on themselves centrifugal forces arising: in the chain elements on curvilinear parts of its movement trajectory, and not transmitting them to the disk bearings, which reduces the loads at the chain hinges.

FIG. i shows the proposed transfer, the general view; in fig. 2 - section along the AA.

The disk / chain drive is mounted on the shaft 2 mounted in the supports 5. Along the disk circumference / perpendicular to its plane with a pitch equal to the step of chain 4, axially movable teeth 6 are located in the guide bushings 5. The outer ends of the teeth 6 are in constant contact with the not / movably reinforced end copier 7. The inner conical ends of the teeth 6 on the loaded part 8 of the disk / are engaged, and on the unloading part 9 of the disk / unhooked with the conical working openings a in the ends of the connecting fingers of the chain 4 . At the entrance to the disk / and exit from it, the guides 10 for the chain 4 are installed.

When the chain 4 moves along part 8 of the disk, during its movement along the guides 10 of the copier 7, when & moving in constant interaction with the opposite ends of the teeth 6, causes their inner conical ends to enter or exit the hitch with holes. . As a result, on the overloaded part 8 of the disk, the teeth 6 aa of the entire nx working length are aimed at the chain 4, thereby transmitting to it the pulling force and perceiving the resulting centrifugal forces. On the unloaded part 9 of the disk 1, the teeth 6 are disengaged with holes, allowing the disk / to move freely relative to the chains of the chain 4. At the beginning of the end of the engagement or disengagement of the teeth 6 with the chain 4, the preservation of the trajectory of the chain and the perception of the centrifugal forces of the chain are effected by the guides 10.

Subject invention

A chain drive containing a chain and a drive force reducing the traction force on the chain is made in the form of a disk with teeth moving in axonum and directly interacting with chain links n receiving axial displacement from a fixed copier, In order to reduce the dynamic loads of the chain hinge, the teeth interact with the working holes made in the ends of the chain connecting fingers, with the mating surfaces of the teeth and working holes made in the line; kiml.

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