SU759765A1 - Louble-spindle coupling - Google Patents

Description

The invention relates to the field of engineering, in particular to the clutch used, for example, in rolling mills, where during operation it is necessary to change the distance between the axes of the rolls.

Known couplings for rolling mills, for example, made in the form of a cardan, in which the heads of the intermediate element have spherical teeth that interact with the teeth of the coupling halves, which allows transmitting rotation to several non-parallel shafts without passive connections [1].

Such couplings, due to intense friction in the teeth, wear relatively quickly and need to be replaced with new ones, with the unit stopped working.

Also known are couplings containing two or more parallelograms interconnected through an intermediate element in the form of a trapezium [2]. Such couplings are unreliable due to excessive multi-link complexity, especially when transmitting large torques. 25

The aim of the invention is to improve the reliability of operation and service life.

This goal is achieved by the fact that the coupling halves are made in the form of locking 30

2

the wheels, the bobbins of which are located along the pitch circle and engage with the bobbins of an intermediate wheel element mounted on cranks, whose axes are rotatably arranged in the sleeves of both coupling halves and with the axes of the intermediate wheel axles, with a common hinge in the center between them. there is a gap with a positive tolerance between the pitch of the contacting pinions, so that the dimensional chain formed by each hinge parallelogram has a guaranteed distance in the closing link. When transferring forces from 0 to 45 ° in each coupling half there are four bobbins.

Roller bearings are installed on the intermediate wheel shears.

FIG. 1 shows a clutch cut; in fig. 2 - kinematic diagram of muft; in fig. 3 - a dimensional chain of a single parallelogram, an arc and a sector of contact between the coils and pressure angles ^.

The double pin coupling is a six-link mechanism and contains two identical coupling halves in the form of pin wheels 1 and 2 'with double bobbins 3 equally spaced along the separating

3

759765

four

circumference; intermediate wheel 4 with flanges 5, on which rolling bearings 6 and connecting cranks 7 are installed. Intermediate wheel 4 consists of two symmetrical halves 8 and 9 of the bearing axis 10 of axles 5 and is mounted on cranks 7 crankshafts on (Bearings 11.

The dimensional chain of the articulated parallelogram is illustrated by the diagram (see, Fig. 3),

where A ₁ is the length of the crank connecting the coupling halves to the intermediate disc;

And _g - the length from the axis of the intermediate wheel or the coupling half to the axis of the bobbin of this wheel;

А ^ is the radius of the coupling half;

And ₄ - radius tsevki intermediate

wheels;

YES - the closing link of the dimensional chain - the gap.

Dimensional chain equation

A ^ + 7 ^ 2 - A ^ - ^ 2 * Δ A. >

The clutch works as follows. By rotating the leading coupling half 1,

torque is transmitted through the bobbins 3 and 5 to the intermediate wheel 4, suspended on the crank 7, and then, similarly, from the intermediate wheel 4 driven half coupling 2. The torque is transmitted to the driven shaft, which is from the driving in the region of distances greater than zero and smaller sum of lengths cranks 7. At the limiting boundary points of this area, there is an uncertainty about the movement of the cranks relative to each other. Bearings 11 are made spherical in order to compensate for possible mounting distortions of the axes, leading, driven and intermediate wheels.

The three-economical efficiency of the proposed double clamp coupling consists in the fact that it can replace the cardan shafts in rolling mills, where during operation it is necessary to change the distance between the rollers with simultaneous transfer of torque to them.

This coupling is simple in design, its manufacturing technology, ensures smooth and reliable operation.

This significantly reduces the weight of the structure compared to the cardan shafts and decreases the area occupied by the rolling mill. _:

.

Claims (3)

Claim 1. Double coupling coupling, containing two coupling halves, connected by means of two or more parallelograms, connected inter-articulated through an intermediate element, distinguished by the fact that, in order to increase reliability of operation and service life, coupling halves are made in the form of pinwheels The coasters of which are located in a pitch circle and engage with the coils of the intermediate element of the wheel mounted on cranks, whose axes are rotatably arranged in the sleeves of both coupling halves And with the axes of the intermediate wheel axles form parallelograms with a common hinge in the center of the intermediate wheel, while between the surfaces of the contacting bobbins there is a guaranteed EaOp with a positive tolerance, so that the dimensional chain formed by each hinged parallelogram has a guaranteed clearance in the closing event. 2. The coupling according to claim 1, characterized in that, in order to ensure its operation at pressure angles from 0 to 4 5 ° and transmission of forces by bobbins in any position of the driven shaft relative to the drive wheel, there are four bobbins in each coupling half . 3. Coupling according to claims 1 and 2, characterized by the fact that rolling bearings are installed on the intermediate wheel bobbins.