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With a gearmotor is a homogeneous and compact unit consisting of a gear unit and motor. In electric drive technology, as manufactured by SEW-EURODRIVE, the latter is always an electric motor. The idea of a "motor-gear unit" goes back to a patent from 1928 by the Bruchsal designer and entrepreneur Albert Obermoser: he invented the so-called "Vorlegemotor".
Since then, gearmotors have been continuously developed and new types of gearboxes invented. On the motor side, DC technology has become less important, which is why gear units are now most often combined with AC motors or servomotors.
The central roller in the gearmotor is played by the gear unit with its gear unit stages, the gear pairs. These transmit the force of the motor from the input end to the output end. The gear unit thus functions as a converter of torque and rotational speed.
In most applications, the gear unit slows down the rotational speed of the motor and at the same time transmits significantly higher torques than the electric motor could provide on its own. The design of the gear unit therefore determines whether a gearmotor is suitable for light, medium or heavy loads, for short or long duty cycles.
Depending on whether a gear unit converts the rotational speed (called input speed) received from the motor into a slow or fast speed, it is referred to as a reduction ratio or a gear ratio. The dimension used for this is the speed ratio i between the input speed and the output speed of the gear unit.
Another important measured variable for a gearmotor is the maximum torque at the output end. This is specified in Newton metres (Nm) and is the dimension for the force of the gearmotor and the load that it can move with it.
The direction of force flow in the gear unit determines the type of gearmotor. There are three basic types: parallel shaft gear units, right-angle gear units and planetary gear units.
The possible applications for gearmotors are extremely diverse. Without gearmotors, entire sectors of the economy would come to a standstill worldwide. In industrial production, for example, they drive countless conveyor lines, lift and lower loads and move a wide variety of materials to be conveyed from A to B in different types of systems.
To name just a fraction of the users:
In the automotive industry, gearmotors can be found throughout the entire manufacturing process, from the press shop to final assembly. In the beverage industry, they move bottles, packaging units and crates and are used for filling or sorting empties. The entire intralogistics of manufacturing companies relies on the drives, regardless of whether materials to be conveyed have to be stored, sorted or delivered.
Even at airports, nothing would work without gearmotors and passengers would wait in vain for their suitcases at the baggage claim.
Handling machines and robots, which require high dynamics and accuracy of fit, would be inconceivable without servo gearmotors.
Last but not least, many a ride in the amusement industry would not exist at all, and the tingling sensation on the rollercoaster would probably be unknown.
When a gearmotor leaves our halls, it never leaves without a nameplate. This is because every technical object must be labelled with this information and thus visibly disclose mandatory data. What information does a nameplate provide us with?
Our example explains.
And if you take a closer look, you will find nameplates even in your own household.
If you are looking for a gearmotor for a specific rated voltage, you will quickly realise that there is a very wide quotation available. The most frequently searched for gearmotors are
As a rule, the gearmotor two stresses are specified, e.g. "
The nameplate attached to each gearmotor must be present on every geared motor, the approval voltage range is part of the required nominal data. The nameplates of most gearmotors indicate a slightly wider voltage range: This is because for electrical machines, voltage fluctuations within a standardised tolerance of
The combination options for our gearmotors are as diverse as their possible applications. Thanks to the universal modular system developed by SEW-EURODRIVE, our customers have access to millions of variants and can find a customised product solution for every requirement. The objective of the modular system is to be able to combine as few components as possible to create the greatest possible variety of end products.
Geared motors from SEW-EURODRIVE are divided into the following categories: standard geared motors, servo geared motors, EMS geared motors, variable speed geared motors, stainless steel gearmotors and explosion-protected gearmotors.
Standard gearmotors are characterised by their diverse designs, the optimal gradation of a large number of sizes and the wide variety of designs. This makes them indispensable, robust drives, especially in production and logistics. Depending on the number of gear ratios, high torques of up to 50,000 Nm are possible.
Force, dynamics and precision: these are the core characteristics of servo gearmotors. Here too, our modular system is the key to extensive combination options and makes a wide variety of gear unit and motoring operations possible in this segment. There is the perfect gear motor for every requirement. gearmotor can be realised.
Depending on whether you combine our PS.F.. planetary gear units or BF.. helical servo gear units with CMP.. synchronous servomotors, DRL.. asynchronous servomotors or DR.. AC motors: Each time, the special interaction of motor and gear unit offers you exactly the drive behaviour that is perfectly tailored to your application and requirements.
You can also use our gear units from the standard range in a variety of combinations with our servomotors and set up and optimize your system individually at the input end.
For applications where the rotational speed of the drive needs to be infinitely variable, our mechanical geared motors are the ideal solution. variable speed gearmotors come into clearance. Such requirements arise, for example, with simple conveyor belts or agitators whose speed has to be repeatedly adapted to different process sequences. The speed is then adjusted steplessly either by handwheel or remote control.
If applications take place in hygienic areas that require intensive cleaning, the gearmotor must be able to withstand a lot of chemicals and moisture. For these purposes, our acid and alkali-resistant Stainless steel gearmotors are designed for these purposes. Their cleaning-optimised surface and fanless design also ensure that no dirt can accumulate in recesses. In terms of power rating, you don't have to compromise on anything. Whether in the RES... stainless steel helical gearmotor design or in the KES... stainless steel bevel gearmotor mounting position: These gearmotors are particularly robust, durable and maintainable and, with bevel gearboxes, particularly space-saving.
The majority of our standard gearmotors and servo gearmotors are available as explosion-protected gearmotors all over the world in compliance with local regulations. This makes them the powerful and safe drives that offer you the high performance you need, even in potentially explosive atmospheres with air-gas or air-dust mixtures.
Are you solution-orientated? Then why not try your hand at our little puzzle :-)
A little jog:
In the picture you can see three of our standard gearmotors: Flat gearmotors, helical-bevel gearmotors, bevel gearmotors. And each gearmotor type stands for a number.
Once you have worked out these numbers, the solution is quite easy, isn't it?
In spur gearboxes, the input shaft (motor) and output shaft (gear unit) are in line. They are also referred to as parallel shaft gearboxes. Helical gearmotors are the most commonly used classic gearmotors.
Our helical gear or helical gearmotor stands for the number 4!
Similar to helical gearboxes, parallel shaft gearboxes are also known as parallel shaft gearboxes: Power transmission is parallel to the axis, but the output shaft is offset downwards. Flat gearmotors are therefore ideal for confined installation conditions.
Our flat gearbox or flat gearmotor stands for the number 10!
Bevel gearboxes go 90° round the corner. They belong to the "genus" of right-angle gear units, as their drive and output shafts are arranged perpendicular to each other. The power flow can therefore be deflected at right angles. Our bevel gearboxes have particularly wear-free gearing. This increases efficiency and, as a result, saves energy costs.
Our bevel gearbox or helical-bevel gearmotor stands for the number 2!
Have you figured it out? Congratulations!
The super number is:
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