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Sewing machine

A sewing machine and permanent magnet technology, which is applied to sewing machine components, sewing equipment, sewing machine control devices, etc., can solve problems such as destruction, repeated occurrence, and electric motor can not run, and achieve the effect of simplified assembly, simple structure and assembly.

Inactive Publication Date: 2005-10-05
DURKOPP ADLER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When assembling an electric motor, especially after it has been removed in maintenance or repair work, faults can occur repeatedly, so that the electric motor cannot be operated or is even destroyed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Figures 1 to 1 The sewing machine 1 shown in 3 comprises a base plate 2 in the form of a housing, a top arm 3 and a column 4 connecting the two parts. The overall shape of the sewing machine 1 is C-shaped. An arm shaft 5 is supported in the top arm 3, through which a needle bar 6 with a needle 7 is driven to reciprocate up and down by means of a crank driver (not shown). The arm shaft 5 actuates a thread hook (not shown) accommodated in the base plate 2 and assigned to the needle 7 via a (belt) belt drive 8 and a shaft 9 accommodated in the base plate 2 .

[0025] A flange portion 10 is provided on the arm shaft 5 at the level of the belt drive 8 . The arm shaft 5 is non-rotatably coupled via a flange portion 10 to a drive shaft 11 of an arm shaft drive motor 12 aligned with the arm shaft. Near the flange portion 10, the drive shaft 11 is mounted via an axial / radial bearing 12a. A handwheel 14 is arranged on a free end 13 of the drive shaft 11 and is connected to t...

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PUM

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Abstract

The sewing machine includes a basal plate, an upper arm to support a driving arm shaft and a standard to integrate the basal plate and the upper arm. A driving device of the arm shaft is formed by an electric motor (12) which is equipped with a rotor (40) and a stator (33). The rotor (40) which is non-rotatably connected to the driving shaft includes a rotor structure (41) and two or more permanent magnets (46) accommodated in recesses (42-45) which are complementary of the rotor structure (41). The shapes of the recesses (42-45) are unsymmetrical so that the individual permanent magnets (46) are accommodated in the individual recesses (42-45) exactly allocated in one magnetic orientation. By this reliability, a defect of the rotor structure having the wrongly oriented permanent magnets is eliminated.

Description

technical field [0001] The invention relates to a sewing machine, which comprises a base plate; a top arm supporting a driven arm shaft therein; a column connecting the base plate and the top arm; a slave formed by an electric motor having a rotor and a stator Boom shaft drive; the rotor has a rotor structure and a plurality of permanent magnets. Background technique [0002] Sewing machines of this type are known from previous publications. When assembling an electric motor, in particular after it has been removed during maintenance or repair work, faults can occur repeatedly, so that the electric motor cannot be operated or is even destroyed. Contents of the invention [0003] It is an object of the invention to improve a sewing machine of the type mentioned at the outset in order to simplify the assembly of the electric motor. [0004] According to the invention, this object is achieved by a sewing machine in which the permanent magnets are accommodated in complementa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B69/12H02K1/22H02K1/27
CPCD05B69/12
Inventor S·霍沙加斯
Owner DURKOPP ADLER AG