1. What is the selection criteria for selecting a gearbox?
Before selecting a gearbox(also known as gearhead or gear reducer ), it's important to take several factors into account: Torque, Rotation Speed and Gearbox Type.
It is therefore appropriate to ask yourself about the torque first and foremost. A gearbox increases the torque of your motor and thus allows a receiving member to rotate under the impact of a new torque. The torque density varies according to the gearbox. For example, planetary gearboxes have a high torque density.
The other purpose of a gearbox is to reduce the motor speed and our engineer will select ideal reduction ratio for your product according to it's application. Based on the rotational speed of your motor, the reduction ratio is used to determine the output rotational speed.
you should ask yourself what kind of gearbox assembly is most appropriate for your application. The input and output shafts of your gearbox can be coaxial, parallel-shaft or orthogonal. This depends on your application.
There are four main types of gearboxs: planetary gearbox, worm gearbox, spur gearbox and helical gearbox. Each gearbox has its advantages and disadvantages. You will have to choose the one that's the most adapted to your motor . For example, if you are looking for a good level of efficiency, perhaps you should consider a planetary gearbox rather than a helical gearbox.
Since2001, Power Motor provides custom engineering to design gear motors utilizing various motor type(brushless DC motor, brushed DC motor, universal motor and other motors)，integrated control & sensing, gear type(spur & helical, worm and planetary) and gearbox material to meet customer specific performance requirements for applications.
2. When should you use a planetary gearbox?:
One of the main characteristics of a planetary gearbox is the coaxial assembly. This type of assembly means that planetary gearboxes are compact.
The advantages of planetary gearboxes include their compact size, high efficiency, low clearance and high torque to weight ratio.
On the other hand, their complex and costly design requires specialized maintenance.
3. When should you use a worm gear reducer?:
Worm gear reducers have perpendicular input and output shafts. They are generally used for applications requiring a very high transmission ratio. The advantages and disadvantages of worm gearbox:
The mechanism of worm gear reducers is non-reversible. This means that the worm wheel cannot drive the worm. The advantage of this non-reversible mechanism is that it ensures a greater level of security for the system. Worm gear reducers are less expensive than planetary gearboxes and are also quieter. Worm gear reducers do not vibrate, so they generate little noise and are more comfortable to use.
However, like planetary gearboxes, worm gear reducers heat up quickly due to how compact they are. They also have a variable performance level. You can however improve the performance by combining your worm gearbox with other gearboxes and gear trains. Power Motor have done it well.
4. When should you use a spur gearbox?:
Spur gearboxs with parallel axes are generally used for applications requiring a lot of power, such as conveyors. The simplicity of their technology will allow you to save on maintenance costs. Additionally, spur gearboxs have a very high performance level, close to 1. They have a low reduction ratio per gear.
5. When should you use a helical gearbox?:
Helical gearbox's main characteristic is their angular bell crank, which allows the user to change the machine’s rotation system. This will allow you to switch from a transverse rotation system to a longitudinal rotation system. :
Helical gearboxs are compact. They are also robust and can handle a lot of power. As such, if you need a high torque we recommend that you choose this technology. The robustness of their teeth allows you to use them with AC universal motors, or brushed DC or brushless DC motors.
Helical gearboxs are quiet, making using them pleasant to use. Additionally, they offer a high performance level and are energy efficient. Their performance level remains lower than planetary gearboxes however. Helical gearboxs are also very expensive and require difficult maintenance.
Helical gearboxs are generally used for high-powered applications, but also for home appliance.
6. Trend: Magnetic Gearbox
Magnetic gearboxs can advantageously replace conventional gear reducers to ensure speed and torque multiplication by using magnetic attraction instead of physical contact between moving parts. To date, complex assemblies, high weight and low torque have slowed the diffusion of this magnetic technology. However, magnetic gears eliminate the need for lubrication and therefore minimize maintenance costs. No lubrication also means that mechanisms can operate at extreme temperatures (currently tested from -200?C to 350?C). These advantages are particularly attractive for applications with high maintenance costs or for those working in extreme environments such as satellites and other aerospace devices.
Along with usage and corrosion, wear is one of the three main factors limiting the life and performance of mechanical components and technical systems. With magnetic gearboxs, the absence of friction not only eliminates wear of the system, it also has a direct impact on service life, which can be the key to maintaining mechanisms that cannot be easily replaced.Material detached from the worn surface in conventional transmissions cannot be easily removed, which can be a significant cause of contamination. Contamination is a particularly serious problem for equipment that cannot be constantly maintained. Advantages to a magnetic gearbox:No lubrication, No wear
> Power Motor have been worked on this technology for few years.