SK872015U1 - Multimotor - Google Patents

Abstract

Multimotor has engines (8) located around the large wheel (2), whereby the small wheels (5) on the shafts of motors (8) and the additional small wheels (7) are between outer periphery of the large wheel (2) and the inner periphery of belted (1).

Description

(54) Name Multimotor (57) Annotation:

The multimotor has motors (8) arranged around the large wheel (2), the small wheels (5) on the motor shafts (8) and additional small wheels (7) being between the outer circumference of the large wheel (2) and the inner circumference of the belt (1).

SK 87-2015 U1

MULTIMOTOR

Technical field

The technical solution relates to a multimotor for the purpose of driving mobile devices, especially electroplanes, due to the advantageous weight parameters and optimal speed. Reciprocal application is an electric generator for low weight purposes.

Prior art

The minimum weight requirements for mobile equipment, especially electric powered vehicles (multikqpter), are currently applied by integrating smaller units into multiple systems or by applying lower power equipment for purposes without higher lift requirements. Multicopters (drones) are thus designed to lift cameras or objects that have a limited weight (urgent medicines, devices), food delivery and the like. Remote and technically simple control in conjunction with low total weight allows the application of a pure electric drive on Lilon batteries or supercapacitors, or a hybrid drive for ever wider applications in various variants. Planetary gears are mainly used for speed reduction, which, however, limit the service life of the equipment with increased stress on the intermediate wheel bearings and their gearing.

The essence of the technical solution

The increase of power and economic parameters of the current state of mobile drives enables a technical solution, the essence of which is a multirotor integrated with a speed reducer containing at least two motors flexibly with »11 *>’ ”·> í” ·>

attached with a flexible clip to the frame or hub for the bearings of the central output shaft. The small wheels of each motor are in contact with rolling on a large wheel around its outer circumference and in contact with a belt on its inner circumference, the large wheel being facilitated by folding a wider circumference with a connector connecting the circumference to the axis of the output shaft.

Between the pair of motors, there are additional small wheels independently loosely mounted between the large wheel and the belt, the speeds of which are opposite. Each additional wheel thus increases the torque at the maximum permissible circumferential force of one small wheel.

The contact surfaces between the large wheel, the belt and the small wheels or additional wheels can be friction surfaces with a sufficient number of contacts with material suitable for friction gears such as Al, Si, Cu oxides or various friction linings with optimal choice of parameters according to performance, efficiency and service life. depending on the static coefficient of friction and the compressive strength of the material. The integrated drive system from a number of smaller units enables low unit transmission power while reducing the specific weight of the motors and the use of high speeds.

Overview of pictures in the drawing

In FIG. 1 is a partial cross-sectional side view of a multimotor with an integrated red.

In FIG. 2 is a view in the direction of the axis of the output shaft

Example of solution implementation

Multimotor for propeller propeller propulsion for special use in handling rescue technology or passenger transport and tourism. The multimotor is under each propeller, e.g. quadcopters and contains e.g. four electric motors 8 with small wheels 5 and four additional small wheels 7. They are ten times smaller in diameter compared to the large wheel 2, which gives the gear ratio for the reduction of the speed of the electric motors 8. The relatively low power per propeller allows the use of friction> »» 9

»>

contact transfers e.g. oxidized duralumin on the contact rings of all wheels. Dimensions and performances are variable according to the purpose of use. In general, the design benefits for weight and efficiency parameters apply to all variants. The radial pressure of the small wheels 5 and the additional wheels 7 is the pressure from the belt 1, e.g. in the form of a clamping disc - a resilient intermediate ring, which rotates opposite to the large wheel 2 and which is also driven by additional small wheels 7 without loading the bearings. The number of small high-speed motors and the method of reduction make it possible to minimize the specific weight of multimotors, including the reduction below 0.8 kg per installed kw.

The possibility of short-term overloading of engines enables efficient transport of loads from the mountains (injured people, waste, wood). A powerful short-term lift is followed by a low-power descent. Weight and cost savings are also possible for the hybrid variant with an internal combustion engine for the thruster in horizontal flight and simultaneous recharging of the battery for short-term loading of electric motors.

Another example is the reciprocal use of a multimotor as an electric generator wherever the speed source is low speed (wind and hydropower systems). Especially in advanced systems, which are designed for operation in higher layers of air flow and where specific gravity plays an important role for operability on tall structures, or on flying aerodynamic or aerostatic devices. - The use of hard, heat-thermally or chemically treated materials allows a technical solution with a life of a roller oil-free bearing at an efficiency of 0.96, while the losses are created mainly by the rolling resistance of the wheels. Bearings - generators (motors) are without load.

Another example is two-stage and multi-stage speed reduction in extreme gear applications. In these cases, the motors 8 are in a multimotor arrangement, thus realizing the first reduction stage. Their central output shaft is positioned on the circumference of the end output large wheel 2. - The transmission is suitable for speed reduction in the technology of mills, crushers, rollers, etc., or speed multiplication in large-diameter wind turbines. In the case of frictional contact surfaces, the advantage is the possibility of cross-cutting in the event of an impact and sufficient transmission force by multiple wheel contact.

Claims (3)

A multimotor integrated with a speed reducer, comprising a plurality of smaller motors arranged around a central output shaft, characterized in that at least two motors (8) are attached radially or by a retractable spring clip (4) to the frame or hub (6), their small wheel ( 5) is in contact with the large wheel (2) on its outer circumference and in contact with the belt (1) on its inner circumference, the large wheel (2) comprising a connector (3) mounted on the axis of the output shaft. Multimotor according to claim 1, characterized in that there are additional small wheels (7) between the pair of motors (8) independently positioned between the large wheel (2) and the belt (1). Multimotor according to claim 2, characterized in that the contact surfaces between the large wheel (8), the belt (1) and the small wheels (7) are friction surfaces of a material with optimal friction properties such as Al, Si, Cu or friction oxides. linings known from the technique for high static friction.