Converts the differential mechanism

 

(57) Abstract:

The invention relates to mechanical engineering and can be used as a transformative mechanism when creating device of the rotary type, variable-speed drives, actuators, mechanisms of intermittent rotation, and so on, the Mechanism includes two coaxially of the output shaft is rigidly secured to them by the Central wheels, one of which is installed with an offset from its axis of rotation, has a non-circular shape and the same number of teeth surrounding it round and eccentric offset by the same amount satellites, carrier bearing axis double row of satellites which engages with the Central wheels and providing a kinematic relationship between the output shafts. The output shafts are made integral and are formed from multiple coaxial hollow shafts attached to them by the Central wheels forming a composite Central wheel kinematically connected through its double row satellites. Composite output shaft associated with a composite non-circular Central wheel, provided with a device that secures or makes it possible to adjust the angular position of a non-circular Central wheels relative to each other. Izobreteny the account of the differential mechanism with variable largest speeds slave units, the required direction of rotation and their mutual phase shift at a constant speed of rotation of the leading link. 1 C.p. f-crystals, 1 Il.

The invention relates to mechanical engineering and can be used in transport machinery and machine. Known planetary gear mechanism of the chain conveyor (see Handbook I. I. II Artobolevsky "Mechanisms in modern engineering", I. 4. ed. "Nauka", Moscow. 1980 Group XIX, index C3, subgroup HQ, and 2810). This mechanism includes a drive shaft with a fixed anosovym wheel, incoming alternately in engagement with the gears of the inner and outer planetary gearing mechanism for rotating one of them and simultaneously locking the other. The rotation of these wheels is transmitted to a summing device, causing the conveyor to move in one or the other side.

For the considered mechanism requires a locking device carried by the slip of the drive wheel by locking arcs driven wheels. This transfer works with tremors and not suitable for high speeds.

The closest in technical essence is a planetary gear reducer, class 47 h 13, 83854 under the old classification (subregister with a non-circular wheels, made in the simplest scheme (for example, under the scheme of the mechanism of David) and contains drove, which is the leading element and the bearing axis satellites, which are in engagement with the Central wheels. The device is characterized by the fact that all his gear is made non-circular, which allows to obtain the necessary law changes the variable gear ratio and its sign.

The disadvantage of this invention is the difficulty of obtaining short pulses of non-uniform rotation for one revolution of the lead managers and the impossibility of their differential use.

Another disadvantage of the known construction is the increased complexity of manufacturing gears of the gearbox.

The present invention is to create a device that allows to obtain a sequence of pulses of non-uniform rotation on the composite output shaft of the differential mechanism when mounted or loaded with forces of resistance depending on load another output shaft in the desired range of the variable gear ratio and its sign for each pulse and their mutual phase shift per revolution drove at a constant speed, differentialism mechanism with variable parameters, containing two coaxial output shafts is rigidly secured to them by the Central wheels, one of which is installed with an offset from its axis of rotation, has a non-circular shape and the same number of teeth surrounding it round and eccentric offset by the same amount satellites, and drove bearing axis double row of satellites which engages with the Central wheels and providing a kinematic connection between the shafts according to the invention, the output shaft is made integral and are formed from multiple coaxial hollow shafts attached to them by the Central wheels forming a composite Central wheel kinematically connected through its double row satellites.

Composite output shaft associated with a composite non-circular shifted the Central wheel, provided with a device which fixes the angular position of the offset noncircular Central wheels, composite non-circular offset Central wheel, relative to each other.

Composite output shaft associated with a composite non-circular shifted the Central wheel, provided with a device that allows you to adjust the angular position offset noncircular Central stake is Noah performing differential mechanism with variable parameters will ensure the achievement of specified technical result due to the relevant kinematic relations of each coaxial shaft, forming one composite output shaft, through its double row satellite, the axis of which is installed on the driver, with coaxial shafts attached to them non-circular offset Central wheels, forming another integral output shaft and an integral non-circular offset Central wheel.

For differential mechanism with one planet carrier ratio between the angular velocities of the links are expressed by the formula

< / BR>
where1- the angular velocity of the first Central wheel 1;

4- the angular velocity of the second Central wheel 4;

in- angular velocity drove.

When stopped the Central wheel1= 0 is obtained planetary gear and gear ratio

< / BR>
where Z1and Z4the number of teeth of the Central wheels;

Z2and Z3the number of teeth of the satellites.

In the inventive device Z1=Z2and gear ratio

< / BR>
When the eccentric offset of the wheels 1 and 2, the rotation of the carrier will cause beating the initial circles these wheels, and gear ratio will change. The value of the instantaneous gear ratio at a fixed offset of the Central wheel is determined by the formula

R3and R4the initial radii of the circumferences of the satellite 3 and the Central wheel 4.

It follows that the ratio

< / BR>
defines the value of the instantaneous gear ratio and its sign.

When

< / BR>
i.e., the speed of the Central wheel 44= 0.

When

< / BR>
its final drive ratio is positive, i.e., the direction of rotation of the carrier and the Central wheel 4 are the same.

When

< / BR>
its final drive ratio is negative, i.e., the direction of rotation of the carrier and the Central wheel 4 are different.

The ratio R'1/R'2has extreme values under such provisions of the initial circumferences of the wheels, when the difference between the instantaneous values of the radii

R'1-R'2= 2e

where e is the magnitude of the displacement of the Central wheel and it is associated with the satellite.

The ratio R'1/R'2determines the average value of the gear ratio of the mechanism and is selected based on the required dynamic characteristics and design features of the device.

Application of the differential mechanism with one non-circular wheel contributes to the relative simplicity of its manufacture. Design, calculations of the round gears", The motor cycle", 1956, Moscow, Leningrad).

The operation of the device with different designs and design options can be used as the transforming mechanisms in the creation of devices of the rotary type, variable-speed drives, drives, adders, periodic rotation, etc.

Using a device with two coaxial shafts, forming a composite output shaft, can be used for adding two movements, for example in planetary gearbox, gears, internal and external gears which are mounted on coaxial shafts, and the movement of these wheels is transmitted to the satellite, resulting in movement of the carrier. The application of a composite non-circular Central wheel can be used when using composite output shaft, formed by four or more coaxial shafts, when you want to increase the number of pulses with the same mutual phase shift, which is difficult using a single non-circular Central wheel, for constructional reasons, and is associated with the placement of the driver four or more axes double row of satellites.

Setting the angular positions of a non-circular Central wheels relative to each other the data with a non-circular Central wheels.

There may also be cases of mutual regulation of single shift pulse rotation during operation of the device. In these cases, on coaxial shafts connected with a non-circular Central wheels, installed a device that allows you to adjust the angular position of a non-circular Central wheels relative to each other.

To illustrate the invention the following is a specific example of carrying out the invention with reference to the attached drawing, which shows a kinematic diagram converts the differential mechanism.

Converts the differential mechanism consists of a drive shaft 10 is rigidly connected to the planet carrier Century. On the driver In installed movably axis 5, 5A attached to them by the satellites 2 and 3, 2A and 3A. Satellites 2 and 2A are in engagement with its non-circular offset Central wheels 1.1 and 1.2, forming a composite of the Central wheel 1, are round, eccentric offset from its axis of rotation by an amount equal to the offset of the Central wheels, installed in phases, providing at running Central wheels constancy center distances and have the same number of teeth with the Central wheel 1. Two in the s coaxially on the racks 7 and 9. On the shafts 6.1 and 6.2 fixed offset noncircular Central wheel 1.1 and 1.2 on the one hand, forming an integral non-circular offset of the Central wheel 1, and the clutch 11 on the other, which may have different performance. On the shafts 8.1 and 8.2 fixed Central wheels 4.1 and 4.2, forming a complex of the Central wheel 4. The ratio of number of teeth pairs 4.1 and 3, 4.2 and 3A is selected based on the destination device.

The device operates as follows. Uniform rotation of the drive shaft 10 and the associated drove In are installed on the axles 5 and 5A causes the movement of the satellites 2 and 3, 2A and 3A relative to the Central wheel 1 and 4, having an external toothing. This mechanism is differential and has two degrees of freedom: the forced movement of one of the links 1, 4, is obtained by a movement of the other two. One of them is usually fixed, and the mechanism has one degree of freedom and is a simple planetary gear more comfortable for consideration.

When running fixed offset noncircular Central wheel 1.1 eccentric offset satellite 2 occurs radial runout, causing uneven rotation axis 5, Zack 8.1. At the same time wrapping the satellite 2A Central wheel 1.2 similarly causes uneven rotation of the output shaft 8.2.

The change in the relative angular position of the non-circular wheels 1.1 and 1.2 from 0 to 360 degrees. causes a phase shift between the pulses of non-uniform rotation of the output shafts 8.1 and 8.2 on the same value, i.e., change their mutual base shear. The installation or adjustment of angular position during operation of the device is carried out by use of fixing or regulating device mounted on the shafts 6.1 and 6.2.

1. Converts a differential mechanism comprising two coaxial output shafts is rigidly secured to them by the Central wheels, one of which is installed with an offset from its axis of rotation, has a non-circular shape and the same number of teeth surrounding it round and eccentric offset by the same amount satellites, and drove bearing axis double row of satellites which engages with the Central wheels and providing a kinematic relationship between the output shafts, wherein the output shafts are made integral and are formed from multiple hollow coaxially connected through its double row satellites, when this composite output shaft associated with a composite non-circular shifted the Central wheel, provided with a device which fixes the angular position of the offset noncircular Central wheels, composite non-circular offset Central wheel relative to each other.

2. The mechanism under item 1, characterized in that the composite output shaft associated with a composite non-circular shifted the Central wheel, provided with a device that allows you to adjust the angular position offset noncircular Central wheels, composite non-circular Central wheel, relative to each other.

 

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