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Surgical motor

A surgical and motor technology, used in surgery, medical science, casing/housing/support, etc., to achieve the effect of improving tooth joints, high motor output, and minimizing manufacturing costs

Active Publication Date: 2017-09-26
AESCULAP AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been proven that in conventional motors of this structural design, sudden blocking of the rotor causes early failure

Method used

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Embodiment Construction

[0022] In the figures, reference numeral 10 designates a coil former of an electric motor, not shown in detail, which may be, for example, a high-speed surgical motor. carrying at least one stator winding 40 (eg Figure 5 A coil former 10 of generally hollow cylindrical design (shown) surrounds a rotor (not shown in detail), usually carrying cylindrical permanent magnets. The rotor is thus concentrically surrounded by a substantially hollow cylindrical coil former 10 with a continuous air gap maintained in the range of one tenth of a mm in order to minimize output losses of the motor.

[0023] This type of motor has smaller overall dimensions. For example, the diameter of the rotor is equal to about 12 mm, and the length L10 of the bobbin is in the range of about 40 mm.

[0024] Due to the fact that in addition to the fixation of the stator winding, such as from Figure 5 It can be clearly seen that other functions (like for example stability in the motor housing) are given...

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Abstract

The invention describes a coil former for an electric motor, in particular a high-speed surgical motor, in which a rotor is surrounded concentrically by the substantially hollow-cylindrical coil former (10) which carries at least one stator winding. In order to ensure that as narrow an air gap as possible between the coil former, which is preferably produced using an injection-moulding method often with complex shaping, and a rotor which runs in the said coil former is permanently maintained, the invention comprises the special feature that the coil former (10) is formed either by a non-conductive fully ceramic body or is in the form of a composite body, in which at least one dimension-stabilizing frame element (30, 32) is embedded by injection moulding with plastic in a plastic body which is preferably produced by injection moulding.

Description

technical field [0001] The present invention relates to an electric motor, in particular a high speed surgical motor, comprising a rotor concentrically surrounded by a generally hollow cylindrical former carrying at least one stator winding. Furthermore, the invention relates to the bobbins used in such motors. Background technique [0002] Motors of this type are based on the fact that they provide very high output with minimal construction, so that rotational speeds of up to 200,000 rpm can be easily achieved. Therefore, such motors are particularly suitable for driving surgical instruments. [0003] A universal motor is described, for example, in document EP 2 135 567 A1. In this known case, however, the construction is such that the stator winding is embedded in the casting compound. [0004] In contrast to this, modern motors comprise a coil former, usually made of plastic material by injection moulding, to which at least one stator winding is applied. The design en...

Claims

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Application Information

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IPC IPC(8): H02K3/47
CPCH02K3/47H02K2203/12A61B17/1628H02K5/02
Inventor 托马斯·卡勒于尔根·巴恩斯蒂芬妮·奥伯罗兰-阿洛伊斯·赫格尔
Owner AESCULAP AG