Electric Motor for Rotation and Axial Movement
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Accused Products
Abstract
The invention relates to a combination drive with a short axial length and a high magnetic capacity. According to the invention, an electric motor comprises a rotational drive device with an outer rotor (AR), and a linear drive device with an outer rotor (AT) or an inner rotor with bearings in the active part. The outer rotor (AR,AT) can be mounted by means of hydrostatic bearings (L1,L2), indirectly by means of a shaft (W), on the stators (SR,ST) of the two drives. Said bearings (L1,L2) are axially arranged inside the outer rotors (AR, AT), presenting a short structural form of the combination drive. Furthermore, the bearings are not located in the magnetic action interstice of the drives, so that they do not influence the capacity of the machine.
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Citations
27 Claims
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1-13. -13. (canceled)
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14. An electric motor, comprising:
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a rotary drive device including an internal rotor; a linear drive device including an external rotor; and a first bearing arranged in a magnetic action interstice of the rotary drive device. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. An electric motor, comprising:
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a rotary drive device including an external rotor and an annular stator; a linear drive device including an external rotor and an annular stator, wherein the external rotor of the rotary drive device and the external rotor of the linear drive device are connected coaxially to one another; an axial shaft to which the external rotor of the rotary drive device and the external rotor of the linear drive device are connected in fixed rotative engagement; a housing for connecting the stator of the rotary drive device and the stator of the linear drive device to one another; a first bearing for supporting the stator of the rotary drive device on the shaft; and a second bearing for supporting the stator of the linear drive device on the shaft. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification