DE2012732C

DE2012732C - V-belt drive

Info

Publication number: DE2012732C
Application number: DE19702012732
Authority: DE
Inventors: Friedrich 6349 Sinn Moogk
Original assignee: E and A Becker Kg 6349 Sinn
Current assignee: E and A Becker Kg 6349 Sinn
Filing date: 1970-03-18
Publication date: 1973-07-12

Description

spindel 12 mittels Handrad 13 betätigt. Die Stellspindel 12 stützt die Stellkräfte mittels Kugellager 14 an der Steckbüchse 1 ab.spindle 12 operated by means of handwheel 13. The adjusting spindle 12 supports the adjusting forces by means of ball bearings 14 the socket 1.

In Fig. 2 ist der gleicheAntriebskegelscheibensatz dargestellt wie :n Fig. I, wobei sich die Getriebe jedoch durch die Verwendung anderer Abtriebskegelhoheibensätze unterscheiden.In Figure 2 is the same drive pulley set shown as: n Fig. I, with the transmission however, by using other output cone height sets differentiate.

In Fig. 1 ist ein Ausgangskegeischeibensatz auf der Maschinenwelle IS aufgesteckt, bei der die eine Kegelscheibenhälfte 16 tiitiels einer Paßfeder Ϊ7 auf einer Steckbüchse 18 aufge" JM ist. Dagegen ist die andere Kegelscheibenhälfte 'ü? mit ihrer in der Bohrung eingepreßten wa:ia?"c-ireien, mehrschichtigen Buchse .19 α ebenia"» -»dsl drehbar und axial verschieblich auf de. Zteckbuchse 18 gelagert. Jedoch wird diese 5v hsioennälfte 19, deren Nabe beispielsweise als Dt.'-Tiomentkurve 19 b ausgebildet ist, durch in die Drehmomentkurve hineinragende Kurvenrolien 20 in bekannter Weise mitgenommen. Die Kurvenrollen 20 sind lose drciibar auf einem in der Steckbuchse 18 quer befestigten Bo'zen 21 gelagert. Die Aostützung der beiden Kurvenrollen 20 an der Drehmomentkurve 19 b erfolgt lastabhängig i;nd dient in bekannter Weise als automatische Riemen- »Orspannvorrichtung, wobei unter leichtem Anpreßdruck der Feder 22 die Scheibenhälfte 19 gegen den Keilriemen 6 gedrückt und die erforderliche Riemenvorspannung, die der Größe der momentanen Leistungsübertragung entspricht, erzeugt wird. Diese lastabhängige, bzw. drehmomentabhängige Spannvorrichtung wirkt in diesem Fall zugleich als Mitnehmerverbindung und ist nicht neu.. In Fig. 1 a Ausgangskegeischeibensatz is plugged onto the machine shaft IS, wherein the one cone pulley half 16 is tiitiels a feather key Ϊ7 on a plug bushing 18 be "JM other hand, the other cone pulley half 'ü with her in the bore wa pressed:? Ia? "c-ireien multilayer socket .19 ebenia α". "-." dsl rotatably and axially displaceably on de Zteckbuchse 18 However, this 5v hsioennälfte 19, the hub is formed, for example as Dt .'- Tiomentkurve 19 b, by in ., the torque curve protruding Kurvenrolien taken in a known manner 20 the curve rollers 20 are loosely mounted drciibar on a transversely in the female connector 18 attached Bo'zen 21 Aostützung the two curve rollers 20 at the torque curve 19 b is carried out load-dependently i;. nd serves in known manner as an automatic belt »or tensioning device, with the pulley half 19 pressed against the V-belt 6 under light pressure of the spring 22 and the required Rie menu bias voltage, which corresponds to the magnitude of the instantaneous power transfer, is generated. This load-dependent or torque-dependent clamping device in this case also acts as a driver connection and is not new.

Der Abtriebskegelscheibensatz gemäß F i g. 2 enthält eine als Reibungskupplung ausgebildete Mitnehmerverbindung, wenn die mittels Druckfedern 23 gegen den Keilriemen 6 angepreßte Scheibenhälfte 24 sich an der mittels Paßfeder 25 auf der Sieckbuchse aufgekeilten Scheibenhälfte 27 abstützt. Die Druckfedern 23 sind im Widerlager 28, das auf der Steckbüchse 26 befestigt ist, gehaken. Auch hierbei ist die Nabe der acheibenl.älfte24 mit einer wartungsfreien, mehrschichtigen Buchse 24 a ausgekleidet. Diese Scheibenhälfte 24 ist auf der Steckbuchse 26 lose drehbar und axial verschiebbar, ohne jegliche Mhnehmerverbindung, gelagert.The output cone pulley set according to FIG. 2 contains a driver connection designed as a friction clutch, when the pulley half 24, which is pressed against the V-belt 6 by means of compression springs 23 at the by means of feather key 25 on the Sieckbuchse wedged disk half 27 is supported. The compression springs 23 are in the abutment 28 on the socket 26 is attached, hooked. Here, too, is the Hub of the axle disc half 24 with a maintenance-free, lined multilayer socket 24 a. This disk half 24 is loose on the socket 26 rotatable and axially displaceable, without any clutch connection.

Nur durch die von den Federn 23 erzeugte Anpreßkraft wird einerseits die Scheiben'nälfte 24 mitgenommen und andererseits dient die Federkraft 23 in der Hauptsache, wie bekannt, zur Erzeugung der notwendigen Keilriemenvorspannung.The disk half 24 is carried along on the one hand only by the pressing force generated by the springs 23 and on the other hand, the spring force 23 is mainly used, as is known, to generate the necessary V-belt pretension.

Die Abstützung der Druckfedern 23 am Widerlager 28 kann auf zwei Arten erfolgen: ίο a) mittels Axiallager oder Drucklager b) mittels einer Rutschkupplung 28 Durch Beobachtung während des Betriebes (also während des Laufes mittels Stroboskop) kann deutlich erkannt werden, daß beide Scheibenhälften (S antriebsseitig und 24 abtriebsseitig) gem. F i g. 2 genau um den Betrag des Keilriemerischlupfes von Null bis 1 %, je nach Belastung gegenüber den Scheibenhälften 3 bzw. 27, nacheilen (bzw. auch gegenüber der Steckbüchse 1 ode: 16 nacheilen), ganz gleich, ob die so Druckfedern 23 mitteL Axialkugellager oder mittels einer Rutschkupplung abgertützt sind.The support of the compression springs 23 on the abutment 28 can take place in two ways: ίο a) by means of axial bearings or thrust bearings b) by means of a slip clutch 28 By observation during operation (i.e. while running by means of a stroboscope) it can be clearly seen that both disc halves (p on the drive side and 24 on the output side) according to Fig. 2, lagging behind the pulley halves 3 or 27 (or lagging behind the socket 1 or 16 ), regardless of whether the compression springs 23 in the middle or axial ball bearings are supported by a slip clutch.

Die Verwendung einer Rutschkupplung 28 als Widerlager 28 Fig. 2 hat lediglich den Vorteil, daß ein Teil des Drehmomentes von der Scheibenhälftt: af 24 auf die Steckbüchse 26 übertragen wird.The use of a slip clutch 28 as an abutment 28 Fig. 2 only has the advantage that part of the torque from the pulley half: af 24 is transferred to the socket 26.

Die fest auf den Achsen aufgekeilten Scheibenhälften 3,16 bzw. 3, 27 "iegen auf der gleichen Seite des Keilriemens 6.The disk halves 3, 16 and 3, 27 ", wedged onto the axles, are on the same side of the V-belt 6.

Dauerversuche haben bestätigt, daß selbst bei hohen Leistungen über N= 100 PS der Keilriemenschlupf noch unter 1 % und die Keilriemen-Erwärmung noch unter der zulässigen Grenze liegt wobei der Keilriemen mindestens gleich hohe Lebensdauer hat, wie bei Keilriemengetriebea herkömmlicher Art. Das gleiche Bauprinzip ist selbstverständlich auch für die Kegelscheibensätze an Getrieben anwendbar, die aus einer Festscheibe und aus einem stufenlos durch Achsabstanr"sveränderung einstellbaren Scheibensatz bestehen, oder auch an Getrieben, an denen eine Zwangsverslellung für beide Scheibenpaare, d. h. an allen vier Scheibenhäifren vorgesehen ist. Ferner ist das gleiche Prinzip auch an Keilkettengetrieben anwendbar.Long-term tests have confirmed that the V-belt slippage even at high outputs above N = 100 HP is still below 1% and the V-belt heating is still below the permissible limit The service life of the V-belt is at least as long as that of conventional V-belt drives. The same construction principle can of course also be used for the conical pulley sets on gearboxes, the one consisting of a fixed disk and a set of disks that can be continuously adjusted by changing the axial spacing exist, or on gearboxes where a forced displacement for both pairs of discs, i.e. H. is provided on all four Discs. The same principle also applies to V-chain drives applicable.

Hierau 1 Blatt ZeichnungenHere 1 sheet of drawings

Claims

1 2 washer halves (low maintenance costs and patent claims: greater operational safety thanks to the option of installing wear-resistant and corrosion-resistant

1. V-belt drive, each with a two-part bearing bush), a drive that is described in the generic term of To create a conical disk on the input and output types listed, output shaft, each disc being one on the other with respect to temperature and stress-related pressure arranged, axially immovable and th belt loads not behind the wedge line Belt drives freely rotatably mounted on the shaft stand back, in which both pulley halves has, the freely rotatable disc halves arranged in a rotationally fixed manner relative to the shaft half on the gearbox input shaft, to over-io.

Settlement change is axially displaceable and this. Task is according to the main claim

freely rotatable disc halves solved on the combination of features listed,
output shaft can also be axially displaced.

and already known by spring force against the ben assigned to it with two-part conical pulleys, fixed disk half is acted upon, thereby 15 the conical disks with regard to their wedge angle asymgekennzeicb.net, that the conical pulleys are metric and the pulley halves with (3, 5; 16, 19 or 27, 24) with respect to their wedge the same wedge angle on the same side of the Keilwin.cels are designed asymmetrically, the belt running plane on the shafts in a rotationally fixed axial direction their shafts (1, IS) rotatably arranged, to be slidably arranged (Swiss patent axially immovable disk halves (3, 16 ao 434 918).

or 3, 2?) with the smaller wedge angle.

are equipped and on the same side of the V-belt drive see the advantage that the belt run level lie. The V-belt is equally loaded across its cross-section

2. Transmission according to claim 1, characterized ujid is a deformation and associated therewith shows that the freely rotating disc halves 15 increase in temperature and a loss of performance (5 24) inside their hub with a "wear and tear" is avoided.

fVsten bushes (5 u, IA ä) are provided, which are made of wear-resistant due to the use of eänei

multi-layer, corrosion-resistant and maintenance sleeve made of multi-layer, corrosion-resistant and free metal-plastic components is constructed. maintenance-free metal plastic components in

The hub of the freely rotatable disk halves results in a reduction in maintenance for this deposit, which is the reduction of the

Maintenance effort for the V-belt

is adequate. In this way, transmissions according to the invention can last much longer without any maintenance run than other known V-belt V-belt drives which is in the generic term of the drive of the FaH.

Claim 1 listed genus are from the USA.- The following is based on a graphic

Patent No. 2,797,587 is known. Representation of exemplary embodiments of the invention

The freely rotatable ¹ ? Storage of the axially ver 40 explained in more detail,
sliding washer halves on the shaft, which shows a part of this illustration:

Readjustment of the output pulley and a compensation F i g. 1 in section an embodiment of a

Movement in adaptation to the belt tension, continuously adjustable V-belt drive with asymmetrical intermediate allow the respective halves of the disk to use metric wedges "η and

more favorable sliding ratio cushions can be used for this type of 45 Fig. 2 in section another embodiment movements can be achieved. such a transmission.

In the known transmission, the freely rotatable parts are in the drawings

The pulley halves are denoted by the same reference numerals with respect to the belt running plane,
arranged diametrically opposite each other. This in the embodiment according to FIG. 1 is a plug leads to the fact that the pulling thread within the belt 50 sleeve 1 on which all gear parts are mounted, runs obliquely. The belt then tends to which the Motorweiie £ (Eingangsweiie) auigesiewki. Run in a drive pulley one pulley half deeper while pushing away the cone pulley half 3 with a slightly inclined barrel. The following area .st firmly in the middle of a feather key 4 on the plug, a change in the transmission ratio sleeve 1 is keyed. A second cone pulley half 5 ses and a deformation of the Keiiriemens after ss with strongly inclined tread is radially and axially longer than Betrtebszeit permanent Ve ¹ modeling comparable loose by means of a maintenance-free, multi-layered, in remains. In this way, the power transmission through the press-in bushing S α is also impaired without being entrained. mer connection stored.

To avoid this disadvantage, the axial adjustment of the disk half S and

other known gears, e.g. according to the German 60 thus the stepless adjustment of the barrel diameter see Auslegeschrift 1 248 384 in the one V-belt of the asymmetrical V-belt 6 /. between the adjacent pulley the relative movement between the two pulley halves J and S takes place in known pulley halves, enzt. Here, however, the manner by means of an adjusting device consisting of V-belts between these pulley halves also a ball bearing 7, which on the one hand is braced and asymmetrical on the hub. 65 Scheirten-half 5 and other one '~> in one hub §

The object on which the invention is based is stored. The SteUnabe 3 is with a holder 9 is thus in it, using the known asialverschieblich, but radially by means of a bolt Advantages of freely rotatable Ii arranged on the shaft fixed at the fixed point 11 and is controlled by an adjusting