DE9306975U1 - Linear axis with variable direct drive and multi-track design - Google Patents

Description

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Description:

One or more motors are mounted coaxially in a housing. These motors move elastic or flexible drive elements. Such housings are attached to both ends of the linear axis. Optionally Such a housing can be replaced by another one with a deflection pulley. The power applied to the drive element is halved. In one variant, a deflection pulley is placed next to the installed motor. The linear axis then has.

about the possibility of carrying out two movements. Parallel, counter-rotating, independent. The drive blocks can be integrated into the user design independently of an axis guide and a separate slide. Commercially available profile systems systems are particularly suitable for this. However, the commercially available linear systems for rollers and rails are also advantageously supplemented.

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Linear axis with variable direct drive and multi-track design

Task : Linear axes are universally applicable units for generating linear movements. They are preferably equipped with an electric drive, in particular servo motors. These servo motors are mounted laterally or coaxially in the axis direction at the end of the axis. This takes up installation space. This installation space cannot be used for other design requirements. The disadvantage of the high installation space requirement must be eliminated by simultaneously increasing the power density of the drive and variably adapting the linear axis to the expected requirements such as multi-track construction, reversing operation, variable power adjustment, in particular fine gradation in small power ranges.

Solution to the task :

By installing motors with a high power density (e.g. brushless DC motors, permanent magnet excited) in the end of the linear axis, a compact drive block is created; the elastic or flexible transmission element, which generates the linear movement, runs over a wheel on the motor.
The drive block can be mounted at one end of the linear axis or at both ends. For the linear axis, this means the possibility of having two outputs available. If only one drive block is mounted, then a deflection pulley is mounted at the other end.

If a drive block is arranged at each end of a linear axis and a separate flexible or elastic transmission element is assigned, two movements on one axis can be carried out independently of one another, i.e. also offset in time, one after the other and also in opposite directions. In this case

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Each drive block also provides the deflection for the opposite drive block at the other end.

The arrangement of two drive blocks at the ends of the linear axis allows the mass to be moved to be connected to each strand of the elastic or flexible transmission element. This means that not only parallel movements on one side are possible, but also parallel movements on the opposite side. The high power density motors can also be arranged coaxially in several units (see also G 91009572.7). The motor pinion can be arranged in pairs between the two motors. Again, such a drive block can be mounted at both ends. Here, too, the mass to be moved can be connected to both sides of the linear axis.

Economical advantages ;

The use of high power density motors as direct drives enables compact construction.

In relation to the pulling force, a very low dead load is moved. This saves energy and time with each lift.

For small parts to be moved - and that is the majority - suitably small but powerful axes are available, which can be adapted to the problem using the possible variations.

Slides working in parallel on one axis elegantly overcome time bottlenecks in step sequences with the same stroke length and stroke position.

Carriage on each run of the drive saves lifting time.

The different configurations of an axle can be put together from the same components.

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05 Explanations: 1 = Housing component

2 = Motor pinion

3 = Built-in motor

4 = Deflection pinion

¹⁰ 5 = Axle for idler pinion

Figure 1 Built-in motor with pinion on both sides for two-track linear axis 15

Picture 2 2 built-in motors with one pinion each for Two-track linear axle

Figure 3 2 built-in motors with common motor pinion for single-track axle with double or

also four times the performance.

Picture H Built-in motor with one motor pinion and loose pulley for two-track axle with single drive.

Figure 5 2 built-in motors with common motor pinion and pushed-on pulley.

30 Figure 6 Deflection pulley

Claims (1)

Ol INTUS - M§sct3iReäi '-"G Linear axis with variable direct drive and multi-track design. Claims: (1) Linear axis, characterized in that in Type of modular system with a drive block mounted on one or both ends. 10 (2) Drive block, characterized in that one or more motors are installed in this block. (3) Linear axis according to claim 1, characterized in that the motors installed in the drive blocks are operated individually or jointly. (4) Linear axis according to claim 1 and 3, characterized in that this linear axis has one or more tracks which are operated individually or together. (5) Linear axis according to claim 4, characterized in that all tracks have the same stroke and the same stroke position. (6) Linear axis according to claim 4, characterized in that the directions of movement of the individual tracks can be selected. (7) Linear axis according to claims 1-6, characterized in that supports are attached to both strands of the moving element. -2-