DE2012732B2 - V-BELT TRANSMISSION - Google Patents

Description

Maintenance effort for the V-belt

is adequate. Transmissions according to the invention can be used in this way for a much longer time without any maintenance run than other known V-belt V-belt drives which is the case in the generic term “drive”.

Proverb 1 listed genus are from de · - USA.- The following is based on a graphic

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

Due to the freely rotatable mounting of the axially ver 40 explained in more detail, slidable washer halves on the shaft, which in this illustration shows:

Readjusting the output pulley and a compensating Fig. 1 in section an embodiment of a

Movement in adaptation to the belt tension, continuously adjustable V-belt drive with asymmetrical intermediate enable the respective pulley halves, metric V-belts and

more favorable sliding conditions can be found for this embodiment paths can be reached. 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, the other arranged diametrically opposite. In the exemplary embodiment according to FIG. 1 is a plug-in guide to the fact that the pulling thread within the belt 50 sleeve 1 on which all gear parts are mounted on runs obliquely. The belt then tends to be plugged into the motor shaft 2 (input shaft). One Drive pulley while pushing away the conical pulley half 3 with a slightly inclined running line Half of the disc to run in deeper. The following area is fixed by means of a key 4 on the plug of it a change to the transmission ratio sleeve 1 is keyed. A second conical disk half 5 This and a deformation of the V-belt, the running surface, which is strongly inclined after 55 mii, is radial and axial longer operating time than permanent deformation loosing by means of a maintenance-free, multi-layer, in remain. Thus, the power transmission through the press-fit bushing 5 α is impaired without entrainment. mer connection stored.

In order to avoid this disadvantage, the axial adjustment of the disk half 5 and

other known transmissions, e.g. B. according to the German 60 thus the stepless adjustment of the barrel diameter See Auslegeschrift 1 248 384 for the one V-belt of the asymmetrical V-belt 6 between the accessory washers the relative movement between the two disk halves 3 and S takes place in a known manner Disk halves limited. However, this is done by means of an adjusting device consisting of V-belt between these pulley halves also have a ball bearing 7, which is on the one hand on the hub of the tense and asymmetrically loaded. 65 disk half S and on the other hand in an adjusting hub 8

The object on which the invention is based is stored. The adjusting hub 8 is provided with a holder 9 is thus in it, taking advantage of the known axially displaceable, but radially by means of a bolt Advantages of freely rotatably arranged on the shaft 10 fixed at the fixed point 11 and is controlled by an

3 4

spindle! 2 operated by handwheel 13 The setting spindle can be rotated and axially displaced without any mechanical

del 12 supports the actuating forces by means of ball bearings 14 on slave connection, stored.

the socket 1. Only by the on-in generated by the springs 23 F i g. 2 is the same drive cone pulley set pressing force, the pulley half 24 is shown on the one hand as in Fig. 1, with the gear 5 taken and on the other hand the fredertcrartz. $ however, through the use of other output cones in the main, as is known, to generate the differentiate disc sets. necessary V-belt pretension.

In Fi ?. 1 is an output conical pulley set on The support of the compression springs 23 on the counter

the machine shaft IS, with one bearing 28, can be done in two ways:

J conical disk half 16 by means of a feather key 17 on io a) by means of axial bearings or thrust bearings

a socket 18 is keyed on the other hand, b) by means of a slip clutch ZK

t the other half of the conical pulley 19 with its in the Boh- By observation during operation (ie

maintenance-free, multi-layered while running ^ k stroboscope) can be

Bush 19 α can also be rotated radially and axially

SchiebUch mounted on the socket 18, however, 15 on the drive side and 24 on the output side; pm. Fig. 2 exactly

is this disk half 19, the hub of which, for example, by the amount of the key slip from zero to

J is designed as a torque curve 19 δ, 1%, depending on the load compared to the Seebenhalf-

lagging behind by curbs 3 and 27 protruding into the torque curve (or also compared to the

venrolle 20 taken in a known manner. The socket 1 or 26 nacKilen), no matter, 00 d,

Cam rollers 20 are loosely rotatable a.-f one in the 20 compression springs 23 by means of axial ball bearings or by means of

Socket 18 mounted transversely fastened bolts 21. a slip clutch are supported.

The support of the two cam rollers 20 on the The use of a slip clutch zn as

The torque curve 19 ft depends on the load and the abutment 23 F i g. 2 only has the advantage that

serves in a known manner as an automatic belt Jn part of the torque from the pulley holder

Pretensioning device, with as 24 being transferred to the socket 26 with light pressure

the spring 22 presses the disk half 19 against the

V-belt 6 pressed and the required belt 3, 16 or 3, 27 are on the same side of the

preload that corresponds to the size of the current lanyard V-belt 6.

stungs transmission corresponds, is generated. These long-term tests have confirmed that se lost at

load-dependent or torque-dependent clamping 30 high powers over N = 100 PS of the wedge belt

In this case, the device also acts as a drag slip still below 1% and the wedge belt

mer connection and is not new. mung is still below the permissible limit, whereby

The output cone pulley set according to FIG. 2 or the V-belts have at least the same service life

Holds a friction clutch designed as a drag, as is the case with V-belts as well as conventional ones

mer connection, if by means of compression springs 23 35 The same construction principle is of course also

pulley half 24 pressed against the V-belt 6 can be used for the conical pulley sets on transmissions

on the by means of feather key 25 on the socket which consists of a fixed disk and a stepless

wedged disk half 27 is supported. The pressure adjustable by changing the center distance

Feathers 23 are in the abutment 28, which exist on the Steckbsatz, or on gears on which

sleeve 26 is attached held. Here, too, the 40 is a forced adjustment for both pairs of discs, i. H.

Furthermore, the hub of the disk half 24 is provided with a maintenance-free one on all four disk halves

multilayer bushing 24 a lined This is the same principle also on wedge chain transmission η

Disk half 24 can be used loosely on the socket 26.

1 sheet of drawings

Claims (2)

1 2 Disc clips (low maintenance costs and patent claims · greater operational reliability thanks to the option of installing wear-resistant and corrosion-resistant 1. V-belt transmission with a two-part bearing bushing) to create a transmission of the type listed in the preamble of the conical pulley on the input and the main claim, gangsweUe, with each pulley being axially arranged on the shaft with regard to temperature and stress-related rotation Non-displaceable and th belt loads are not behind the wedge lines freely rotatably mounted belt drives on the shaft, in which both pulley halves have the freely rotatable pulley halves opposite to the shaft non-rotatably arranged half on the transmission input shaft to ίο. . Settlement change ajdal is displaceable and the This task is solved according to the freely rotatable disk half on the transmission of the * -'-listed combination of features. gangsweUe also axially displaceably guided It is already known for continuously adjustable wedge sizes and spring force against the ben assigned to it with two-part conical disks, fixed disk half is acted upon, characterized 15 the conical disks with respect to their wedge angle asymmetrically, that the conical disks 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 wedge angle as / i.! Are designed metrically, the belt running plane on the shafts axially fixed in rotation; rotatably arranged on their shafts (1,15), to be slidably arranged (Swiss patent specification axially immovable disk halves (3, 16 20 434 918). or 3, 27) with the smaller wedge angle. are equipped and on the same side of the V-belt drive see the advantage that d.-r belt run level lie. V-belts are equally loaded across their cross-section 2. Transmission according to claim 1, characterized and a deformation and associated shows that the freely rotatable disc halves 25 increase in temperature as well as a decrease in performance!? K (5, 24) inside their hub with a wear and tear is avoided. fixed bushing (5 α, 24 α) are provided, which are made by using a wear-resistant multilayer = open, corrosion-resistant and warnings- sleeve made of multilayer, corrosion-resistant around ', free metal-plastic components is constructed. maintenance-free metal-plastic components in the in 30 nprn the hub of the freely rotating disc halves there is a reduction in the maintenance effort for these bearing points, the reduction in the,