DE6750050U - RETURN LOCK FOR SMALL SELF-STARTING SYNCHRONOUS MOTORS - Google Patents

Description

P.A. 532169-7.9.

PATENT LAWYERS SR. SNG. KARL BOEHMERT DIPL.-ING. ALBERT BOEHMERT 28 DREMEN FELDSTRASSE 24 TEL. (0421) 491760, 442551

New registration

PoiNd »d (Konlot Hamburg 126083 Sankkonto ι Sram.r Bank, Bremen, account 1001449 Namo d. Note i COUZET Motn sign »0 556

28 Bremen, September 6, 1968

GRÖÜZEi, Paris (France.)

Backstop for small, self-starting synchronous motors

It is known that small self-starting, single-phase synchronous motors generally have a backstop are equipped so that the motor can only rotate in one direction.

Although previously known locking devices fulfill their function, they are nevertheless subject to various disadvantages. For example, the ^{devices that work with "Ereilauf 11"} are constructed in a relatively complex manner and installation is difficult. Devices that work with a "ratchet system" are

Shoe / 28

Although simple, but generate noise X IND she "forming Tei ⁿ e which are subject to wear in particular a high degree.

Other "known locking devices" all either have additional components or are of intricate structure (interlocking parts).

The present innovation has therefore set itself the task of specifying a backstop that is particularly is simple and can be manufactured at low cost. This will be according to the innovation achieved in that the backstop device from a preferably made of plastic There is a cam disk that has the shape of a closed loop, which is fixed around a loop by one of its

^ - sides and parallel to the axis of the motor

Axis is pivotable and interacting in one piece with a ratchet arranged on the rotor Pawl is made; and that the cam disk surrounding a part of the rotor hub opens Because of its elasticity with this part in such a way that it is one of the withdrawn parts Position of the pawl in relation to the teeth corresponding first stable position assumes when

the rotor turns in the desired direction, and ix ?, a second position can be set, in dft? · the pawl in the circular orbit the ratchet teeth protrudes and blocks the rotor when the rotor is in the direction of operation tniygesen wants to turn in the set direction.

. Due to the special design of the new device

Likewise, by the way they are built in, the The direction of rotation of the motor can be set, and the gate direction only functions when the motor is oaicho starts running in the intended direction. In this Tall, the system pulls itself into one as soon as the motor starts rotating in the desired direction «Unstable position back» so that noiseless functionality is ensured.

In the following, the furnace will be described in more detail using an in Preferred embodiment shown in the drawing will be explained. In the drawing shows:

Fig. 1 is a longitudinal section through a

small, self-starting phase-in Synchronous motor, which is equipped with a backstop according to the present innovation}

FIG. 2 shows a section along line A in FIG. 1.

The runner is held by a multi-pole Pennanenta magnet 1 formed, by means of a circular cage 3 made of plastic that surrounds it »It is connected to axis 2. The cage is on one its sides are provided with ratchet teeth 3a serving as stops for the backstop and has an extension 3b of its cylindrical hub, the ihinTction of which is described below.

A cam disc provided with a recess ■ It is a closed outline, which has a pawl 4b, around a pawl inserted in the stator 6 Axis 5 pivoted, in such a way that, as in Pig. 2, either those shown in dashed lines Locked position shown in lines or a withdrawn position shown in solid lines can take. The pivoting movement of the cam disk is "limited in these two positions," that the cam disc strikes at one point of part 3b of the hub.

From 3 ″ ig. 2 the details of the cam disk 4 are shown to see. Dtia? Ch the the location of the cam disk during the indentation 4c which determines the running of the engine, in connection with the inner recesses 4e and 4d,

the section of the cam 4- near the Point 4-a given a certain elasticity, so that this section then comes into contact with part 3b of the hub Has.

Depending on the sighting in which this friction is exerted will, will dfcie cam disc 4- either in their withdrawn position or moved to their locked position. Because the pawl 4b designed large and the cam has a certain elasticity, the device will have a long service life achieved"

Claims (2)

. Mr. J J L UO (. Ü -. L U Sch.utzanspru.che 1. Backstop, especially for small, self-starting single-phase synchronous motors, thereby goVeanaeiehae-b. that they are made of a preferably made Plastic-made cam disk (4) is made, which has the Porm of a closed loop, which around a solid, through an iltirer side and parallel au on the axis of the motor (2) extending axis (5) can be swiveled and made of one piece with a ratchet teeth (3a) arranged on the rotor (5) interact. Pawl (4b) is made; and that the cam disk surrounding a part (3b) of the rotor hub due to its elasticity with the latter Part is so engaged that it is a the first stable position corresponding to the retracted position of the pawl in relation to the teeth assumes when the rotor rotates in the desired direction, and brought into a second position can be, in which the pawl protrudes into the circular orbit of the ratchet teeth and the runner blocked when calibration wants to turn the motor in the opposite direction to the operating direction. Sehu / 28 KiS ^ ffi ^ 2. Backstop according to .α-claim 1, characterized in that the cam provided with the pawl is designed so that it is in a first and a second in. 180 ° turned position can be placed on its pivot axis (5) so that the rotor is locked in one direction of travel or in the opposite direction of travel). 67500