Chain conveyor drive for feeding blanks

Description of the mechanism drive (drive purpose, gearbox description).

A drive is a device that drives a machine or mechanisms of units and assemblies.

It consists of the main parts:

- Motor (electric motor);

- Executive Body;

- Transmission device.

A mechanism is a system of bodies designed to convert one view motion into another.

Worm-cylindrical reduction gears have worm-high-speed stage with usual parameters for it and one or two cylindrical stages with parameters of cylindrical reduction gear of expanded circuit. These gearboxes have high gear ratios and low noise levels. The worm is typically positioned at the bottom, due to engagement lubrication conditions, worm bearing arrangement, and assembly conditions.

Selection and inspection of bearings

During the construction of the gearbox layout, the bearings have already been preselected according to the shaft diameter. Therefore, the calculations given are limited to checking the selected bearing and refining its type, diameter and series according to the program PODSCH.EXE The initial data for the calculation of bearings are: bearing installation diagram, required life, safety factor, temperature factor, ring rotation factor, load cyclogram. For the bearings of the worm, the calculation is carried out separately, since the bearings of the worm are radial-thrust conical, and the intermediate and slow-moving shafts are radial ball .

Gearbox assembly

Assembly consists in connection of all units to each other by means of bolts. Bearing sockets are closed with embedded covers, which do not require threaded fixation. Reduction gear case and cover are connected by bolts tightening at bosses and flanges.

Before connecting the cover to the housing, it is necessary to cover the surface of the housing flange with a thin layer of sealant. After filling of oil check the reducer for tightness.

Frame Design

These elements are supporting structures and serve for connection into a single unit of a machine or separate mechanisms, in this case - drive units. They perceive and transmit to the foundation the loads acting on the machine and ensure the correct location of the units during operation.

In addition to strength, support structures must be rigid, since the latter determines the vibration resistance of the machine.

When developing the design of plates or frames, the operational, technological and economic requirements for the machine are taken into account.

The length and width (L and B) are specified along the drawn drive contour. We assign the height of the plate based on the condition of sufficient rigidity based on the design practice of similar structures:, where L is the length of the plate; L = 1150mm, H = 115 mm. We choose in accordance with GOST 824089 next bigger channel - number 12 (N =120mm).

Under the main view is a top view. It shows the holes in the legs of the electric motor and reduction gear, the coordinates of their location, which we take from the catalog of motors and from the drawing of the reduction gear.