DE2015304B2 - CLAMPING BODY FREE WHEEL CLUTCH - Google Patents

Description

015

304

Itiirker curved. When the switching part is rotated, clamping bodies 12 are arranged so that they can be tilted one end in the direction of the lighter end at least on one of its end faces in a radial direction takes place first up to a dead center with the direction of the sprag freewheel clutch on top of each other maximum spring pressure force have a further through-arranged projections 13 and 14. the bending the loop while moving over 5 projections 13 are in recesses 15 of a first guide cage 2 and the other projections 14 beyond the dead center in both circumferential directions spring relaxation occurs. Instead of one in recesses 16 of a second Fülr.ungskäligs .1 Spring loops can also hold several spring loops. The one projection 14 is set in one Are arranged, the expediently symmetrical hook-shaped extension 17, the an annular spring 18 fresh over the circumference of the sprag freewheel, through which the sprags in clamping be distributed. direction are biased. The one leadership

Appropriately, the recess in the cage 2 is bent at right angles and overlaps the (One cage is smaller in the circumferential direction than the second guide cage 3 arranged underneath it, the iparung in the switching disk. This leads to the fact that in turn the ring spring 18 engages over and protects. the switching disk by a 15 A spring loop 5 is a switching disk 1 is rotated greater distance than that connected by this with the one guide cage 2. the Twist-adjusted guide cage. This longer spring loop 5 is in the radial direction of the coupling The path of the switching disk during the adjustment process allows it to be bent to different degrees, with the extent of the light the use of a softer spring loop, bend from; here closer to the inner race 11 the connection point with the guide less located in the two stop or end positions ao is excited. The length of the recesses, cage! towards the closer to the outside transmitter Driving pin and the arrangement of the spring race 10 located connection point with the loops are always coordinated with one another in such a way that switching disk 1 increases. The spring loop 5 is on that the two ends are right-angled due to the proportions of the dimensions, each in relief and the driver pin is bent in the possible opposite direction and engages in rotation of the switching disc and the adjustable corresponding openings in the switching disc 1 or Guide cage is sufficient to snap the in the guide cage 2, whereby they position-spring loop beyond the dead center into which is fixed. The guide cage 3 carries one in each case allow opposite direction. direction of the axis of rotation of the sprag freewheel coupling

The arrangement according to the invention can also so 30 ment outwardly protruding driver pin 6, welgetroffen be that the one guide cage is formed in a recess 8 of the guide will that he the function of the switch cage 2 ais also in a recess? the switching disk takes over. The spring loop connects disk 1 engages. The driving pin 6 it as. thereby the two guide cages. Stop for the guide cage 2 and the switching

The clamping body freewheel disk 1 according to the invention on the inner edges of the recesses 8 and 7, which are exposed in the circumferential direction, can be switched off and switched over. In the embodiment which can be switched off, the stop effect due to the pretensioning of the mold is ensured by all clamping bodies in the known spring loop 5. The clear width with the same inclination in the circumferential direction around the recesses 8 and 7 and the longitudinal extension of the inner ring and are switched off by the switching disk 40 of the driver pin 6 so that they are in readiness for clamping or out of readiness for clamping and the fastening points of the spring loop 5 are switched off. It is true that when the clamping body is switched off - when the clamping body overrunning clutch is designed to be switchable by rotating the switching disk 1, only every second has in the circumferential direction in which the drchbewe-clamping body has the same inclination, while the 45 movement is possible is, the spring loop 5 over the dead-end clamp body in each case inclined in opposite directions point of their maximum curling out into the are. In one switching position, the one series opposite end position is snapped. By clamping bodies of the same inclination except for clamping rotation of the guide cage 2 with respect to readiness, while the other series with the Fühningskäfigs 3 around the path a, the clamping opposite inclination in clamp readiness frefin- 50 body 2 of the one track, in both shown. In the other switching position, the position of the play of the outer raceway is lifted, while the same-clamping body is exactly the other way round, so that the switching disk 1 can be reversed by the greater distance b direction when the switching disk 1 is clamped. twisted, causing it to snap over

On the basis of the drawing, a path required for the spring loop 5, for example, is available

Embodiment of the invention explained in more detail. 55 th is. While the spring loop 5 for the

F i g. 1 shows a partially sectioned partial view if switching pressure is provided, the annular spring 18 causes this

a clamping body freewheel according to the invention, the clamping bodies are in contact with a raceway. Of the

coupling; Driving pin 6 prevents its stop

F i g. Fig. 2 is a radial section of the embodiment positions that the clamping bodies are in the grip position

1. 60 by the guide cage2 additionally by the

DJs shown in the figures clamping body-free tension of the spring loop 5 are pressed. In the clutch has two concentric ring-shaped shut-off positions, the driving pin 6 prevents

Runways 10 and 11. Between these runways that the clamping bodies fold too far.

1 sheet of drawings

Claims (3)

ö) T: 5 304 1 2 by means of a pin which is fixed to the housing and which is located in a recess of the switching disk, pivotable through a certain angle. During this pivoting movement 1. Clamping body overrunning clutch with between the clamping bodies are forcibly rotated via their two coaxial clamping surfaces with the inner two coaxial clamping surfaces 5 toothing of the switching disk in engagement disordered clamping bodies and a rotatable extensions of the switching cross, coaxial ring-shaped switching disk, which over the respective end positions by a Screws are fixed in a tilting spring mechanism with the clamping bodies, which is located between the connection fixed to the housing, characterized by a pin and one of the projections, which _{ln the} following features: io lie approximately in the circumferential direction. At the Versenie a) in a known way, two are relative to one another rotatable guide cages (2, 3) show engagement of the disc and switch cross seen, the spring stretched with the clamping bodies (12) up to a maximum deflection, in order to perform the tilting movement afterwards, it can contract again and handle stand, the clamping body (12) 15 is used in the end position reached for Lagefixierunü. by a spring (18) in the clamping direction. This device works as a tilting spring mechanism are biased. has the disadvantage, however, of having to deal with everyone b) the switching disk (1) is connected to the cage with the individual clamping body switching crossc (2) ela- individually must be acted upon by means of a toggle spring (5), whereby the gesture coupled, and the other cage (3) 20 overall structure is relatively complicated. has an axially parallel driving pin. The object on which the invention is based (6), the one with circumferential play (α) therefore consists in creating a clamping body freewheel recess (8) of a cage (2) and coupling of the type mentioned above, with circumferential play (b) in a recess with a caged freewheel (7) engages in the switching disk (1). 25 reversible and easy to manage. 2. Coupling according to claim 1, characterized by this object wildly according to the invention indicates that the snap spring is released as a spring, that in a known manner two relatively closed loops (5) is formed. other rotatable guide cages are provided which 3. Coupling according to claim 1 or 2, characterized with the clamping bodies for executing the Kippgekennzeichne ', that jie recess (8) in the 30 movement are engaged, the clamping pins The cage (2) is smaller in the circumferential direction and is provided by a spring in the clamping direction the recess (7th in the switching disk (1). are tensioned, and that the switching disk with the one The cage is elastically coupled by means of a toggle spring pelt and the other cage is axially parallel 35 has driving pin, which with circumferential play in a recess of the ehen cage and with circumferential The invention relates to a clamping body freewheel play in a recess in the switching disk coupling engages with between two coaxial clamping surfaces. tiltably arranged clamping bodies and e ^; There are already sprag freewheels with two coaxial ring-shaped switching disks, which have over 40 cages for the movable guidance of the clamps in a tilting mechanism with the sprags in bodies, in which the sprag is connected. Spring devices biased in the clamping direction There is already a switching mechanism with stilt-shaped ones and in a non-contact position opposite Clamp body !! A track can be fixed between two coaxial circular cylinders, with see Klcmmbahnen known (German patent 45 the guide cages in the circumferential direction of a font 528 202). The clamping surfaces of the clamping straps are displaceable. Each sprag is lines are semicircular, so their center is connected to the two guide cages in such a way that tnif the stel / en longitudinal axis. On this axis lies the shifting of the guide cages in Um-Cin Pivot point, around which the clamping body to the circumferential direction against each other a tilting movement of the Cincn angles of less than 180 ° can be pivoted 50 clamping bodies in the circumferential direction. at should do. Due to this pivoting, these freewheels must, however, be necessary for the Vcrschic-JSehaltriclitiing of the freewheel reversed. The clamping of the two guide cages against one another is embodied are due to the shutdown force required in the direction of the pivot axis on the shaft or on Protruding pins in a housing around this pin outer race are supported to prevent fen held rotatable. The housing in turn is at 55 that the freewheel is in the direction of the attacking arranged a shaft on which a switching force rotates as a clamping surface. Since the sprags at load servants Bund sits. The second clamping surface is to roll up the mount and therefore the guide cages those opposite to the clamping surface of the collar are subject to a relative movement, this inner surface must of the housing. Support must necessarily be attached with a spring. Those that go through one housing wall are the "actuating elements for switching and the the bearing journals of the sprags are fitted with a spring-loaded attachment of the freewheel to the inner ring Provided with a switching cross, which must be provided in the outer ring or in the outer ring, If projections parallel to the axis protruded from 90 °, difficulties arise in particular, those with a corresponding internal toothing in when the production of the inner and outer ring a switching disk are in engagement, which is not done on the 65 by the freewheel manufacturer. Outside of the housing coaxially to the shaft. An advantageous development of the invention is arranged. The switching disk is due to the fact that the toggle spring as a spring from the outside in the braked state of the arrangement loop is formed. This is part of the loop