DE1943189U - CLUTCH FOR SELF-ACTING, SPEED-DEPENDENT CHANGE-OVER OF A TWO-STAGE DRIVE. - Google Patents

Description

RA. 300 017-8 -S K

CONSTRUCTAWERKE ^U " U, UiUU

GMBH PVA 65/5523

File _{c 12}

Coupling for automatic, speed-dependent switching of a two-stage drive

The innovation relates to a clutch for automatic, speed-dependent Switching over a two-stage drive, e.g. for washing and centrifugal machines, with two concentric coupling surfaces, which are each assigned to an output shaft, which is followed by an output with a different gear ratio and one between the coupling surfaces on a common axis Coupling jaw pair mounted on one side on the driving coupling part, which is connected to the inner one by tension springs at low speed Clutch surface is in engagement and through at higher speed Centrifugal action comes into engagement with the outer clutch surface. The adhesion of the individual clutch shoes to the inner clutch surface depends on the respective direction of rotation of the clutch. There is a risk that when switching to a higher speed one of the clutch shoes has already lifted off and with the outer clutch surface has come into engagement while the other clutch shoe is still in connection with the inner clutch surface.

This phenomenon results in very severe wear of the clutch shoes and can, under certain circumstances, lead to the destruction of the clutch. Attempts have been made to remedy this disadvantage by using tension springs of different strengths for applying the clutch shoes to the inner one

- 1 - 6.6.66

Gi / Mg

PVA 2/11 (official form) 1000 12.63

PVA 65/5523

Fix coupling surface. However, this measure is only for clutches, which are operated in one direction of rotation can be used and does not completely rule out the risk of the clutch shoes lifting unevenly. It is also the case with single-acting centrifugal clutches known to accomplish a uniform release and application of the clutch shoes by actuators. At a known embodiment are the clutch shoes by means of actuators articulated to a common flyweight, when it moves the coupling arms are pivoted evenly and thus simultaneously be brought into or out of engagement with the clutch drum or the clutch wheel. If, however, the centrifugal clutch, as intended, be designed as a double-acting clutch, in such a way that the centrifugal levers at a low drive speed holding clutch part, the clutch jaws in engagement with an inner clutch wheel and at high speed with a outer clutch wheel come, so little space remains within the clutch for attaching a flyweight controlling the clutch arms and their handlebars.

The task of the innovation is to create a double-acting centrifugal clutch to create the flyweight lever with the clutch bars attached to it evenly when the speed of the drive changes lift off one clutch wheel and simultaneously engage the other clutch wheel and vice versa. This task is carried out according to the innovation solved in that the respective spring tension and designed as a centrifugal lever clutch bars around a common Axis can be pivoted and one below the other by an actuator that forces the uniform pivoting of both centrifugal levers,

are connected. _ 2 - 6 6 66

Gi / Mg

PVA 65/5523 [/

The actuator is advantageously pivotably mounted on one of the clutch jaws and has two mutually inclined adjusting grooves in the area of the other clutch jaw one groove engages an adjusting bolt attached to the clutch jaw, while the other groove engages one on the driving clutch part Receives guide pin. Such a design of the actuator means that each angular position of the one clutch shoe is assigned an equal angular position of the other clutch jaw, so that the pair of jaws from one clutch surface at the same time lifts off and at the same time engages with the other coupling surface comes.

In the drawing, an embodiment of a clutch designed according to the innovation is shown partially in section.

The clutch part 1 according to FIGS. 1 and 2 driven by an electric motor, not shown, is assigned an inner clutch surface 2 of a first output and an outer clutch surface 3 of a second output. The concentric coupling surfaces 2, 3 can be designed, for example, in the form of wedge ring grooves. On the driving coupling part, the coupling jaws k, 5 are on the centrifugal ^{levers 4 ', 5!} placed, the latter being pivotably mounted about the common axis 6. The free ends of the centrifugal levers 4 ^! , 5 'are assigned tension springs 13, which hold the coupling arms 4, 5 in engagement with the inner coupling surface 2 as shown in FIG. 1 when the coupling is at a standstill and when the coupling is driven at low speed.

- 3 - 6/6/1966

Gi / Mg

PVA 65/5523

When the clutch is driven at a higher speed, the effect of the centrifugal force lifts the clutch shoes k, 5 from the inner clutch surface 2 and, as shown in FIG. 2, engages the outer clutch surface 3 against the action of the springs 13. In the area of the common axis 6, an actuator is provided which can be pivoted about an axis 8 rigidly connected to the centrifugal lever 5 'and which has an adjusting groove 9 in the area of the centrifugal lever V, in which an adjusting pin 10 rigidly arranged on the clutch jaw k is guided. Another groove 11 inclined with respect to the adjusting groove 9 receives a guide pin 12 connected to the driving coupling part 1. The arrangement of the adjusting grooves 9, 11 forces an equal-angle adjustment of the two clutch shoes.

2 claims for protection 2 figures

- k - 6/6/1966

Gi / Mg

Claims (2)

1. Coupling for automatic, speed-dependent switching of a two-stage drive, e.g. for washing machines and spin dryers, with two concentric coupling surfaces, each of which is assigned to an output shaft, which is followed by an output with a different transmission ratio and one between the coupling surfaces on a common axis on the driving shaft Coupling part pair of clutch jaws mounted on one side, which is in engagement with the inner clutch surface by tension springs at low speed and comes into engagement with the outer clutch surface at higher speed through the effect of centrifugal force, characterized in that the centrifugal levers (V, 5 ¹ ) pivotable about a common axis (6) and connected to one another by an actuator (7) which forces both coupling jaws {k, 5) to pivot uniformly. 2. Coupling according to claim 1, characterized in that the actuator (?) ^{Is pivotably mounted on one of the centrifugal levers (5!} ) And in the region of the other centrifugal lever (V) has two mutually inclined adjusting grooves (9, Ii), wherein in the one groove (9) engages an adjusting bolt (10) attached to the centrifugal lever (V), while the other groove (ll) receives a guide pin (12) arranged on the driving coupling part (l). _ 5 _ June 6, 1966 ■ Note! The »Unterleg * (eeeehteioung wnd Sonuuonspi.) Is 41« luhm elnqeroieme, »leGjiisj / ÄtfSon <i * r Wo« '"*" ♦ * - ^w um «*?» * ¹ ! «! R'swetehfe« Untwiegen ob. Oie / «ehHiehe 3edwtuRg« Ic * Abwtehun? fet rvirh; , ^ prtff. ·· wew * -) «* Α« φ. ^^ Κνι inferior teflon stand in the AmlsokHn. Si © kfesr ^ jaitenw.it «-., .- n- v, _e iv Intetseses g ^ bähfsfifrai eingassheo waniea. On AM ^ we / ^ ii hisrv »n