"gears" newsreels and historical clips

... device is carried out by a transfer mechanism.

Wrench.

Planetary gear mechanisms.

A sample of the simplest gear mechanism.

It consists of two gears with fixed axles.

A sample of a planetary mechanism, this is a mechanism with movable axes.

A gear wheel with a movable geometric axis is called a satellite.

The ...

... their axes and at the same time move with the driver.

A sample of such a planetary mechanism.

The fixed axis of the driver is called the main axis.

Gears whose axes coincide with the main axis are called central.

The simplest planetary mechanism has one leading link.

The leading link can be a driver or ...

... manufactured with conical and cylindrical gears.

A sample application of planetary gear is an aircraft engine gearbox.

In the 3k planetary gear, the main links are 3 central wheels, and the driver serves only for the installation of satellites.

The next coaxial planetary gear is k-h-V.

The torque from the satellite ...

... satellite is the leading link.

An example of a misaligned planetary gear is the rotation mechanism of the excavator platform.

Kinematic analysis of planetary mechanisms is carried out using the method of motion reversal.

Determination of the gear ratio from one link to another.

Transfer ratio indexes.

Determination ...

... spinning-belt machine.

Kinematic transmission capabilities with a negative gear ratio.

The gear ratio can be increased if two mechanisms are connected in series.

In planetary gears with two pairs of wheels with external teeth, the gear ratio is positive.

If the gear ratio is close to one, then the transmission has great kinematic capabilities.

Kinematics of the differential of the car.

When turning, the wheels of cars rotate at different speeds and go through different paths.

The driveshaft transmits motion from the car engine through a gear pair to ...

... to the driver, and then through satellites to the bevel gears connected to the wheels of the car.

In rectilinear motion, the entire gear train rotates as one.

When turning, the speed of one central gear differential wheel increases, and the other decreases.

This speed difference is provided by the rotation ...

... in transmissions.

Losses in planetary and conventional transmissions may differ.

Determination of efficiency in planetary gears.

In coaxial planetary gears with cylindrical gears, the conditions of alignment, proximity and assembly must be met.

The alignment condition can be expressed in terms of the ...

... the number of teeth of the wheels of the planetary mechanism.

Reference book planetary transmissions.

Table "Alignment conditions of planetary gears".

Neighborhood condition.

If the number of satellite teeth is selected incorrectly, the transmission is not assembled.

Samples of planetary transmissions ...

... large gear ratios with high efficiency and small dimensions.

The transmission with conical wheels is used as a differential.

The 3k transmission is the most contact, allows you to get large gear ratios.

The planetary mechanism in the loom.

A progressive solution is the embedding of planetary gears in the ...

... the actuators of machines.

Various examples of the use of planetary gears.

... transmission.

A sample of a gear train is a clock.

A cartoon showing the operation of cylindrical and bevel gears, internal and external gearing of gears.

Grinding machine.

A cartoon explaining the transformation of rotational motion into translational motion using a gear train.

Multi-stage transmissions ...

... transmissions.

The gearbox of the lathe.

A cartoon explaining the concept of a gear ratio.

The formula of the gear ratio.

The formula of the gear ratio for multi-stage transmissions.

The gear table at the lathe.

The tulip opens.

Alternating frames with different types of movement.

... Council.

Discussion of problematic issues.

Design bureau.

Testing the strength of the part.

The workpiece for the gear.

The new technology is hot rolling.

Ready-made gears.

Hot rolling of driven gears.

Pressing of the part.

Casting by smelted models.

Trucks are driving on the road.

Gears in the engine of the car.

Transport on the street of the city.

The boat is floating on the river.

Helicopter.

Gear transmission.

The traditional method of manufacturing wheels by gear milling is laborious, accompanied by a significant waste of material into chips ...

... chips.

A cartoon explaining the disadvantages of the traditional method of manufacturing gears.

Technological equipment for rolling toothed profiles.

The rolls, pressing out the heated workpiece, are embedded in its surface.

The metal moved by the rolls comes out and forms teeth.

A cartoon that clearly explains ...

... shape and dimensions and, only after that, enters the gear rolling position.

Asterisks are used to transform mechanical energy

chain gears.

Mill for rolling single and double row stars.

The process of their production is similar to rolling gears.

In 20 seconds, the asterisk is ready.

During the rolling ...

... different machines to perform the same functions.

Such parts are called general purpose parts.

There are three groups of such details:

- parts from the gear assembly unit;

- parts serving rotational motion;

- connection details.

Samples of details of each group.

A workshop where assembly units are assembled ...

... necessitates the use of mechanical gears.

A sample of a mechanical transmission.

Passenger car, transmission.

Mechanical transmissions are used to change speeds, torques, or transform types of motion when transferring energy from the engine to the working bodies.

Mechanical friction gears can be friction or belt ...

... belt.

Samples of each type of transmission.

Gearing gears, which include gear cylindrical and conical gears, have become the most widespread in technology.

Gearing gears also include chain gears and screw-nut gears.

Couplings are used to connect the shafts and transmit the torques.

Blind couplings are used ...

... Compensating couplings allow radial and angular displacements of the axes of the connected shafts.

The shaft of the SUV.

Characteristic parts of mechanical gears are shafts and axles.

The shaft is used for fixing parts that transmit torque.

Unlike the shaft, the axis only supports the rotating parts on it.

... part of the rear axle of the car.

Transmission of the ZIL-130 car in the section, transmission mechanisms.

The clutch, transmission, driveshaft, main gear, differential, and drive shafts of the semi-axles that make up the vehicle's transmission.

The layout of the clutch on the car.

Rotation of the clutch ...

... the clutch.

Rotation of the gear wheels of the gearbox, the interaction of their movement of the car.

Gear box arrangement, shafts and synchronizers (animation).

Grouping the transmission gears into the necessary combinations.

The scheme of switching on and switching gears (animation).

... double main transmission ZIL-130.

Rotation of pairs of bevel and cylindrical gears of the main gear.

Diagram of the interaction of gears and shafts of the main transmission during movement (animation).

Rotation of the gears and shafts of the main transmission in the crankcase sockets of the drive axle ...

... the highway.

View of the driveshaft and rear axle of the car while driving.

The location of the gear differential in the main gear.

Gear differential device (animation).

Rotation of the differential gears.

The car is moving in a straight line.

The scheme of rotation of the differential satellites when ...

Gears are often used to transmit rotational motion.

The profiles of the teeth of two gears engaged in flat mechanisms form the highest kinematic pair of Class 4.

Usually the teeth on the wheels have an involute profile.

They can be performed by copying on a milling machine using a shaped milling cutter ...

... device that demonstrates the method of bending.

A cartoon explaining the envelope method.

The method of cutting gears using a gear rack is demonstrated.

The tool can also be a chisel - a gear wheel with cutting edges.

A cartoon explaining this method.

The movements of the chisel are controlled by a cam ...

... around a fixed axis.

Cartoon explaining the law of motion of the driven link - rocker arm.

Motion reversal is effectively used not only in profiling gears and cams, but also in the study of the movement of complex mechanisms.

A helicopter lands.

Fixing the screw to the helicopter.

Mechanisms called gears are used to transfer rotational motion from one link to another.

It is possible to transfer movement from the leading link to the slave directly, or through a number of intermediate links.

There are multi-stage and single-stage ...

... single-stage transmissions.

A stage is a transmission that has only two links with fixed axes of rotation.

The gear ratio is the ratio of the angular velocity of one link to the angular velocity of another link, it is equal to the inverse ratio of the radii of the initial circles of the wheels.

The minus ...

... ratio of radii can be replaced by the ratio of the numbers of teeth.

The gear ratio of gears with internal gearing will be positive, because the angular velocities have the same sign.

A cartoon defining the formula of the gear ratio in a two-stage transmission.

There are mechanisms in which several transmission ...

... differential with internal gearing.

The property of differential mechanisms for two given differential speeds to find the third is used in calculating machines.

The differential mechanism is used in the drive of the driving wheels of the car.

This mechanism uses bevel gears.

When moving in a straight ...

... technology, due to the fact that, depending on their structure, it is possible to obtain small-sized systems with a large gear ratio or a higher efficiency compared to conventional gears.

The transmission mechanism of the helicopter propeller.