DE2238422A1 - MANUAL GEARBOX FOR WASHING MACHINES - Google Patents

Description

PlCHTEL ft SACHS AG SCHWEINFURT / MAIN Patent and utility model Δ / .ΟΌΗΔ4,

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Gearbox for washing machines

The invention relates to a gearbox for washing machines ssu m driven by a polums e obtainable η electric motor for at least one wash and one spin speed each for the one to be driven Washing drum, with a gear input and an output shaft and interconnectable undercutting and with locking devices accidental centrifugal clutch elements are provided

A gearbox with a centrifugal clutch is already known, which is used to drive household wasoh machines with washing and spin cycle of the washing drum is configured. The gear includes a continuously driven reduction gear sewie a centrifugal clutch, whose Fliehgewiohtträger also is coupled to the input shaft. The centrifugal clutch is equipped with locking devices, which enable the clutch to take effect. ment on the output V-belt pulley attached to the output shaft and connected to the clutch drum at the same time Above the engagement speed of the fleeing victim as long as possible until the drive motor is downshifted or switched off for a short time · This activates the previously effective blocking der Fliehgewiohtsbaoken the centrifugal clutch released by the V-belt pulley With the driven washing drum with practical continues to run at an unchanged speed due to the greater moment of inertia compared to the gearbox. With a pole-sized electric motor IMMn sioh with an appropriate design of the centrifugal clutch Several washing or spin speeds for the drive the washing drum. In this known transmission, which is relatively simple as a solohes, can, however be annoying because the washing drum is less full under certain circumstances, there is too little excess inertial force compared to the gearbox With a driving electric motor

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brings so that dl · cancellation of the locking of the centrifugal clutch and switching from the drive to the reduction gear the drive is only not always reliable via the centrifugal clutch IUeIg takes place.

The invention is accordingly based on the object Design gearboxes for washing machines so that with low possible effort, however, a reliable effect can be achieved with regard to the switch to the spin speed can.

According to the invention, the solution to this problem consists in that the locking device · of the centrifugal clutch from under pedera tension standing locking elements exist, which are provided between the Fliehgewiohten and the Fliehgewiohteträger of the centrifugal clutch. -Dleee Design of a gearbox enables In in particular it is easier to keep several drive speeds for the washing drum of the washing machine to be driven.

It is essential for the gearbox to work reliably favorable that the tension of the acting on the locking elements Springs is measured so that the locking elements only at higher speed of the electric motor release the Fllehgewlohte, whereby the The tension of the return springs acting on the flyweights is dimensioned in such a way that it is even at a lower speed of the FllehgewlohttrMgers let the flyweights come into engagement.

Two-way is the feature that the hatch learns from the refugee are formed by spring-loaded, pivotable pawls, the axial bolts in the flyweight carrier in the locked state overlap. It is also possible that the latches on the Fliehgewiohten v »n · pawl-shaped at the free end Spring sticks are formed, each of which is attached to the fly weight « with the free end in the locking roughness axial bolts in the Reach over refugee campers. Furthermore know the locking elements Formed on the Fliehgewiohten by spring-loaded locking balls Min, which is adjacent to the carrier part in the Fliehgewioht, approximately radially

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are housed facing and in the locked state in latching counterpart * intervene on the flyweight carrier. It is advantageous to that the advice is based on radial projections of the Fllehgewiohtsträgers arranged plates old adapted to the Raatkugel Impressions exist.

Finally, it is also advantageous »if the Rasteltnente from Strip-fused spring elements are formed, which are stretched in itself formed, each attached to Pliehgewioht approximately tangentially directed to the drive shaft and in the locked state cooperate with axial bolts attached to flywheel carriers, wherein a radial projection provided on the associated Pliehgewioht the free length of the Federelerneηte, acting in blocking sense, prevented.

Further advantageous details and equipment options of the gearbox according to the invention result from the description and the graphic representation of execution examples a manual transmission to drive household appliances. Ss show

Flg. 1 A manual transmission in partial representation in Längssohnltt, especially nlt illustration of the centrifugal clutch,

Flg. 2 is a side view of the centrifugal clutch of the gearbox after the line II-II of the Flg. 1,

3 shows another embodiment of the centrifugal clutch Manual transmission in partial representation in longitudinal section,

Flg. 4 «Ine side view of the centrifugal clutch according to the Line IV-IV of Flg. 5,

FIG. 5 shows a detail of FIG. 4, enlarged.

Flg. 6 «a further embodiment of the centrifugal clutch to gearbox In Tel! representation in longitudinal section,

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Pig * 7 · 1η · Stittnaneioht dtr centrifugal clutch gtalt ·· dtr Llni · VII-VII dtr Pig. 6,

Fig. 8 shows a different embodiment of the centrifugal clutch 3o content gears in partial representation, la Lttngeeahnitt,

Fig · 9 «int Seltenanaloht dtr centrifugal clutch, geek ·· dtr Line IX-IX dtr Flg. 8th.

In dtn drawing figures and dtn execution foratn ink Sohaltgttritbta bus Antrltb btlspltlawtl · · tintr householdawaaohaaaohln · ltdlglioh dit Jtwtlla trfindungagtaKaa auagtetelttt « Centrifugal clutch and dit Abtrltbtaohtlbt to drive dtr not ge te igen Wasohtroeatl over a also not shown Ktllritaen shown. Both dtr pole-changing · Eltktronotor zua Drivebdta gearbox · al · also the old dta electric motor gltichaahalg vtrbundtnt reduction gears, wtlcht btlepltl - wt 1 ·· alt Plantttngttritbt auagtatalttt etln can and in tints axial vorgtsogtntn Lagtreohild dt · Bltktroeotore gthäuaeartig aufgtnoawtn is, and dit aftergtechaltttt, double-acting spring clutch alnd nloht dargtattllt, wtil ditat Bautltotntt dt «Schalt · fttrItbta in dtn vorlitgtndtn version · ** iepitItη ltdlglioh zur Wtlttrltung dt · Drthaoatntsa vo «Eltktroaotor htr, Jtdooh nloht wteentlloh alnd for the inventions inebeeondtrt dtr centrifugal clutch aelbet in association dt · gearbox ·.

d
In all execution tables, we only show the universally valid old dtr Wt11t dt · Slektroaotora dlrtkt vtrbundtnt ztntralt Ottriebenwelle 1, because position 2 is deceptive for tin al · Ktllrltatneoebelhtlbt 3. The ·· Ktilritatneohtibt 3 igt tintratit · on a • uf dtr Wt11t 1 coaxially supported hollow shaft k rotatably arranged and another ·· it * old intr to the shaft 1 or · 4 coaxial coupling «trOBBtI 6 tiner Flithkraftkupplung ^ connected.

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These parts are included in all versions * of the gearbox the same and are therefore given the same reference numbers like other similar parts. With all forms of execution of the gearbox, a Fllehgewiohtträger is attached to the end of the shaft 1 in a rotationally fixed manner, which is axially directed Trunnion for rotationally symmetrical storage of has swiveling flyweights, which theirereelta under the effect of return springs 11 are.

in the execution example according to Figures 1 and 2 are the for Centrifugal clutch 5 associated centrifugal weight carrier with 7 and the designated Fliehgewiohte designated with 9. The Fliehg «wioht · are radially outside with friction linings 1o to engage the clutch drum 6 is provided. The centrifugal clutch is closed by a cover 12, in the side view of the centrifugal clutch According to Figure 2, this cover is removed. WI · in particular can be seen from this illustration, affect the Flyweight baoken 9 except for the return springs 11 nooh blocking elements in the form of pawls 13. These · pawls are respectively a "m" nds on each Fliehg * wiöht pivotably articulated via one Pin 14 and are pivoted by a spring 15 to the Drehzentrun, where it is at rest with the other latch-like end the Fliehgewiahte each overlap an axial pin 16 can which one in an axial attachment part 1? d «s Fliehgewiohttrttgers provided 1st. In the version, play according to the figure 1 and 2 with two flyweights, the locking pins 16 rest an equal radius to the center of rotation of shaft 1 and dab ·! on the Duroh-nesser line, which "dl" two pivot pins 8 of the Connects refugees with one another. The pawl · 13 Ut as Bleoh-Stanrteil formed, the pressure spring 15, which · the The locking pawl in engagement with the pin 16 has, in the embodiment, for example, the design as a limb spring, the ends of which are on the one hand between the Fliehgewioht and the other hand in the pawl intervene and the twisted middle part is supported on the pawl pin 14.

The gearbox with the prescribed centrifugal clutch genas "in Figures 1 and 2 has the following" mode of action.

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Shaft 1 becomes the start-up d · driven and there the Pllehgewlohtstrlger 7 of the centrifugal force « coupling 5 · Zugleloh is mentioned in the introduction via daa «Reduction gear and the overrunning clutch drives the hollow shaft 4, which the V-belt pulley 3 contributes to the drive of the Not shown Waaohtrommel the Wasohmaaohine. The centrifugal clutch 5 let hlnaiohtlioh dea Fllehgewiohtes 9 and the Return springs 11 ao designed »daft JDeI drive old of the lower Speed of the electric motor, i.e. with a four-pole position the fleeing prophet strive to be able to use it, however duroh the locking organs, i.e. prevented by the pawls 13. The V-belt pulley on the hollow shaft 4 isausohlleBUoh Driven by the reduction gear, the washing drum is driven at a reduced speed compared to the electric motor, which serves as a Wasohgang.

When the electric motor is switched to two-pole operation, calibrates the doubled speed on shaft 1 and thus also one Significantly higher speed of the centrifugal clutch 5. The centrifugal weight jaws which were previously prevented from pivoting out by the pawls 13 9 now generate even higher centrifugal forces, as a result of which the correspondingly designed springs 15 or the likewise under Centrifugal effect standing pawls 13 are lifted as far as the fact that the singriff with the locking pins 16 is canceled. the Fliehgewiohte 9 now reach the clutch drum 6 to be swiveled out. A friction lining is produced via the friction lining 1o » to the clutch drum, the V-belt pulley 3 now runs directly with the increased engine speed, much less for you Spin cycle of the Waaohtrommel can serve. The previously effective reduction gear is overtaken via the overrunning clutch.

If the electric motor is switched off completely, the refugees fall back under the action of the return springs 11, the pawls 13 engage over the locking pins 16 and the Fliehgewiohtsbaoken 9 are again blocked. When the electric motor is switched on again, it is driven again via the reduction gear and the overrunning clutch on the hollow shaft% and thus on the

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V-belt pulley 3 with correspondingly reduced speed. Dta previously reserved so designed according to the invention

The drive “allows a further increased speed of a V-belt pulley 3 to be achieved * For this purpose, the electric motor is only switched to the higher speed for a short time, for example in two-pole operation, so that the locking of the fliehlight 9 aeitena of the pawls 13 in the pre-drilled manner is overcome »then the electric motor is switched back to the lower speed entapreohend four-pole operation to Uo kge» because of the design of your binary speed, the fleeing 9 remain swiveled out anyway. The spring-loaded pawls 13 remain out of engagement, the drive takes place directly via the centrifugal clutch 5 on the V-belt pulley y old of the now lower engine speed, which can also be used as sole oar speed, however by a lower engine. The reduction gear is also overhauled in this case of operation.

When the electric motor is shut down, the fledgled 9 fall into Rest position back, the pawls 13 then come back to Intervene and block those who were forced to flee in the manner already described Against swiveling out sohon at a jolting speed of the shaft

in FIGS. 3, 4 and 3 there is another exemplary embodiment a centrifugal clutch shown to a manual transmission. at this centrifugal clutch} o is on each of the Fliehgewiohtstrager 37 refugees hinged on pin 8 31 each one Spring element 32 attached, which on an elongated "· P «d« rbandstr «ifen b« «t« ht, whichever is radial at the pli «hg« near the inside is attached. The spring strip 32 is fled with one angled end in a recess in the Fliehgewloht attached and is bent at the other, free end, roughly like a latch. With this pawl end 33 engages over the spring element in the idle state every fleeing victim each «in« n lock *

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itift 16, weloher in an axial anaatztell 37 de · Fliegewiohtträgers 7 axially riveted attached let. Each spring line nt 32 In each Fliehgewloht 31 a locking pin 16 is assigned. the special shape of the bend of the latch part 33 <*** spring elements 32 is shown enlarged in FIG. 5. Ks is clearly recognizable "that the feather elves 32 In Antonius to the Pawl bend 33 * which is adapted to the radius of the locking device 16 1st, stretched again. The locking pins 16 that hold the In Execution game provided by the two Fliehgewlohten 31 resp. the spring elements 32 are assigned, lie on the glelohen Radius in relation to the center of rotation of the shaft 1 and at the same time on which the two pivot pins 8 of the flyweights 31 connect Diameterllnie.

This performance "belsplel" has the following mode of action. Also with this centrifugal clutch, the reverse speed is the same placed that the Fliehgewiohte 31 already at the lower engine speed Swing out according to the four-pole circuit. By means of the appropriately designed spring elements 32, the fleeing fled 31 locked, however, the drive takes place from the shaft 1 via the reduction gear, the overrunning clutch, the hollow shaft 4 to the V-belt pulley 3 and from there to the washing drum, which is driven at a correspondingly reduced speed in the Wasohgang will.

If the electric motor is switched to two-pole operation, or from a standstill with a two-pole circuit is already carried out in the execution example according to Flg.1 and 2 described catfish a change of the transmission. The blocking ones Spring learn te 32 give those under higher centrifugal force Fllehgewlchtebaoken 31 ium pivoting freely, the clutch drum 6 with the associated V-belt pulley 3 is immediately driven at the speed of the motor shaft · 1. The ·· speed can be used for the spin cycle of a washing drum.

Even with this design bracket, a manual transmission 1st attgllch, another higher than the Wasohgang speed

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number to receive. To do this, the electric motor is briefly turned on The centrifugal weights 31 are released by the previously locking spring elements 32 and remain due to their engagement speed swiveled out and in engagement with the clutch drum 6 also then * when the electric motor is immediately switched back to the lower speed corresponding to four-pole operation. The restoring force the locking elements 32 is dimensioned so that the once pivoted flyweights 31 are not impaired in terms of their engagement in the clutch drum 6, as long as the Flyweight carrier with a four-pole operation of the electric motor corresponding speed rotates. The drive of the V-belt pulley 3 and thus a connected washing drum takes place immediately with the lower engine speed that for another Spin cycle is used. The reduction gear is also overhauled in this case of operation.

When the electric motor is switched off completely, the flyweights fall 31 under the action of the return springs 11 back into the rest position, the spring elements 32 snap in again via the locking pin 16 « The spring tension of each locking element 32 is designed in such a way that a significantly lower one for engaging with the locking pin 16 Force than to disengage the pawl part 33 is required will.

the exemplary embodiment of a gearbox with centrifugal clutch according to Fig. 6 and 7 are flyweights with essentially the same Orund construction 61 of a centrifugal clutch 6o on a flyweight carrier 67 pivotably and rotationally arranged. On the one hand, stand the flyweights 61 constantly under the influence of return springs 11 and on the other hand, there is a blocking organ in the form of a Locking ball 62 is provided with pressure spring 63, which on a axial extension 64 of the flyweight carrier 67 acts. This approach 64 is the number of flyweight · 61 correspondingly with stop surfaces 63 equipped, which from the hub of the fleeing gun carrier 67 sloh extend approximately radially outward. Each of these strikes 63 is in the idle state of the centrifugal clutch 60 a «Raetlcugel 62 ,:

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opposite, which is approximately at right angles to the aneole surface rlohteten bore arranged under a spring 63 standing 1st. Each contact surface 65 is provided with a plate 66 with a locking hole for the locking ball 62 provided.

The prescribed gearbox with the centrifugal clutch 60 has the following mode of operation when the electric motor starts up with a four-pole circuit, the Fliehgewlohte 61 remain, their local locomotive speed is matched to this speed because ο oh blocked by the locking ball elements provided in each flyweight 62, welohe are set with their pressure springs 63 so that At this speed, the flyweights remain locked on the flyweight carrier or the contact surfaces 63, 66. The drive the V-belt pulley 3 takes place from the motor via the reduction gear, whereby a low speed is available, which is used to drive the washing drum in the wash cycle.

With a significant increase in the engine speed, for example by switching to two-pole operation, the centrifugal force on the Fllehgewiohten 61 increases nooh more, the detent elements 62, 63 are now overcome due to their design, that is, the flyweights are released and come to rest in the clutch drum 6, thereby If the V-belt pulley 3 is now driven directly at the engine speed while the reduction gear is being overhauled, the washing drum runs in the spin cycle.

When the electric motor is switched off, the fleeing people 61 fall under Influence of the return springs 11 in the rest position back, the locking balls 62 each again engage in the Oegenplatten 66, whereby the Fliehgewlchtsbaoken are locked again.

When the electric motor runs up, use a two-pole circuit in the catfish already described, the Sperreleeente 62, 63 »66 overcome, the flyweights $ 1 intervene and remain auoh in it, if the electric motor soon goes back to Hoohilufen * is switched to four-pole operation. The Keilrlemenaohelbe 3 is now driven directly at the engine speed, the reduction gear is overtaken and there is a second, opposite de »the operating condition described above, lower slip ·

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the speed to drive the Wasohtronnel.

in the Pigurtn 8 and 9 let a further execution form tiner Centrifugal clutch 8o for a manual transmission shown «Auen hitr the structure in the majority of the parts is the same as those Figures 1 and 2. The Fliehgewlohte 81 are stored aohwenkb & r on pin 8 dta Fliehgewiohttrttgers 87, the one on the end the shaft 1 attached iat. The refugees 81 are under Effect of RUokholfedern 11 and wide locking organs in Gastalt of leaf springs 82, the old one end close to Fllehgewioht The pivot point are activated and move to the N «_be of the Fliehgewiohttrkgera 87 extend towards approximately tangential direction. With Each celebration element 82 draws the free end into the area of a axial pin ·· 83 »of in Fliehgewiohtaträger 87 each flyweight assigned ala stop provided iat. In untensioned In the state, each leaf spring 82 stretches radially inwards against a stop 84 against each flywheel. With these Stop 84 becomes the resilient lung of each ßlattfederelenentea 82 shortened and thus a greater spring force is achieved because the spring element 82 as a blocking element which has to absorb the not inconsiderably large centrifugal force. On the other hand, it should click into place easily of the locking organs, i.e. the spring elements 82, what quite benefit of the said free space dea Federelenentea 82 and apply to one provided radially inward on each flyweight Edge 85 is effected.

The effect of this implementation fora is as follows. As in the case of the above-described embodiment forms of a Gearbox with centrifugal clutch is also used in the Fliehgevichtaayaten ao laid out that the engagement speed of the four-pole Circuit of the electric motor achieved speed corresponds. On the other hand, the leaf spring elements act in the dleaen speed range 82 ala locking device for the fleeced lnd the leaf springs, »Support the iah on the anaohlag 84, place it against the locking pin 83. the In this way, the centrifugal clutch does not work, the drive

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The Veilritmeneohtibe 3 also takes place via the reduction gear and a low speed is obtained for the washing cycle, for example.

Only at a higher speed, for example when switching on the two-pole To operate the electric gate, the tension of the spring element must be $ 2 overcome by the then greater centrifugal force on each flyweight 81 and the Pliehgewiohte reach engagement in the clutch drum 6. Now the V-belt pulley is driven immediately after the engine speed and there is a spin cycle the Wasohtrommel achieved. When the electric motor is switched off completely the Pliehgewiohte fall back into the Ruhraage «the locking spring elements 82 come into effect again. As already indicated, the fall of the flyweights in the locking position is facilitated by the special design and arrangement of each leaf spring element 82 in conjunction with the Ansohmagkante 85 on each flyweight.

When the electric gate is on high speed »i.e. two-pole operation is held, the centrifugal force occurring at the flyweights 81 overcomes the retaining force of the springs 11 as also the locking leaf spring elements 82, the hardness of which has been increased by the stop 84 smell, if the electric motor immediately is switched back to the lower speed corresponding to four-pole operation, the flyweights 81 remain pivoted out due to the same identifier already mentioned and the V-belt pulley 3 is now directly with the now lower engine speed driven. Even in this operating state of the drive the reduction gear is overtaken at a lower spin speed.

The invention is not restricted to the areas shown and required in the figures. Bound as described embodiments. There are no further developments in particular the centrifugal clutch and the locking elements are conceivable without leaving the scope of the invention. as well If the invention is not limited to use in washing machines, but there are other possible uses of the

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2238A22

according to the invention equipped gearbox nd.t centrifugal force » clutch think, for example, for driving land vehicles bar.

Furthermore, the invention is not limited to the measures defined in the claims; instead, protection is claimed for all _B disclosed in the documents insofar as this is new, progressive and inventive.

409807/06

Claims (6)

Claims Gearbox for washing machines to be driven by a pole-changing electric motor for at least one washing machine each and spin speed of the washing drum to be driven, with a gear input and output shaft and Intermediate reduction gears and those provided with locking devices Centrifugal clutch elements are provided, characterized in that the locking elements are made under Pedert tension standing Rastelemensmn exist between the Fliehgewiohteη and the centrifugal weight carrier of the centrifugal clutch are provided. 2. Gearbox according to claim 1, characterized in that dafl the tension of the springs acting on the locking elements is so dimensioned that the locking elements (13, 32, 62, 82) only at higher speed of the drive electric motor, the Fliehgewiohte (9, 31 * 61, 81) release, the voltage of the Fliehgewiohte acting return springs (11) is dimensioned so that this is already at low speed of the Fllehgewlohtträgere (7, 67, 87) let the flyweights engage. 3 · Gearbox according to claim 1 or 2, characterized in that dafi the locking elements on the Pliehgewiohten, (9) by rederbelaste th, pivotable pawls (13) are formed, the Im Locked state of axial bolts (16) in the flywheel carrier (7 # 17) seize again. 4. Gearbox according to claim 1 or 2, characterized in that that the Raatelemente to the Fllehgewlohten, (31) from the free Spring stiffeners (32, 33) which are kinkf & rmlg formed at the end each attached to Fliehgewloht, with the free end, (33) in the locked state axial bolts (I6 | (lm flyweights support (7, 37) overlap. 5. Gearbox according to claim 1 or 2, characterized in that the locking elements are formed by spring-loaded locking balls (62) are, which in the Fliehgewloht (61) load the carrier part (67) " ² " 409807/0641 -M- $ 4 niohbart, housed approximately radially * iia stands in Rastgegenstttoke (65, 66) at FliehgewiohtetrMgftr (67) intervene. 6. Gearbox according to claim 5, daduroh g® indicates * dafl the counter pieces, (65,66) from on radial Voreprtingen (64) of the FllehgewiohttrKgers (67) arranged plates (66) alt the locking ball (62 | adapted impressions exist. 7 «Gearbox according to claim 1 or 2, characterized in that« that the grid elements of strelfenfttraigen spring elements (82) educated child who are trained within themselves «each one Pliehgewloht (81) roughly tangetlal xur fluted drive shaft (1) are attached and in the locked state Kit aaa Pliehg «- wiohtträger (87) attached axial bolts (83) work together » with a respective aa associated Pliehgewioht (81) provided radial projection (84) the free lung of the peder element ■ duck (82) i «Lock in effect, reduced and that as Pliehgewioht (81) in each case a contact edge (85) radially on the inside for the associated pedestal element (82) with regard to its freer element The length in the direction of the bend is provided close to the radial direction. ^ 09807/0641