DE102005002029A1 - Pulley for belt drives with stud fastening - Google Patents

Abstract

Pulley for use in control and aggregatriementrieben of internal combustion engines with an attachment to the engine block by stud and nut and a spacer between stud and inner bearing bore, wherein the spacer (5) of two on both sides of the ball bearing ring (8) plugged, with protruding annular collars (6, 7) on the end faces (18, 19) adjacent and play in the axial direction of the roller (4) facing each other, releasably on the ball bearing inner ring (8) content Erten ring parts (5a, 5b).

Description

Territory of invention

The The invention relates to a pulley for use in control and Aggregate drives of internal combustion engines with an attachment on the engine block by means of stud bolt and nut, and with a spacer between Stud bolt and inner bearing bore.

background the invention

By the use of such a spacer will not only be a game adaptation between bearing seat and bearing bore without influencing the radial clearance of the camp, but you also have one through the attachment-side end face of the spacer a corresponding spacer for attaching the pulley in the engine block.

Of the Disadvantage of the previous pulleys with spacer exists in the awkward Assembly, because several components that are only loosely connected with each other stand, threaded onto the studs and held in position Need to become, until the final Fixing over the mother is reached.

Summary the invention

Of the Invention is therefore based on the object, a deflection roller of the type mentioned above in such a way that with a simple structure a simplified installation possible is.

to solution this object is inventively provided that the spacer from two on both sides of the ball bearing ring plugged, with protruding Ringbunden adjacent to the end faces and in the axial direction of the roller with play, facing each other, solvable on the ball bearing inner ring salaried ring parts.

The Providing these two ring parts, which together form the spacer, not only has the advantage that for a stud fastener, too on the outside of the engine, where the nut is is screwed on, an attachment member for the mother without use a loose washer od. Like. Is available, and without the Mother must attack directly on the ball bearing inner ring, but by the detachable Attachment to the ball bearing inner ring can be carried out a pre-assembly, so in the actual assembly on the engine only one component, namely the Guide pulley handled with the already attached two-piece spacer needs to be. Of importance in this context is that the spacer forming Ring parts facing each other with play and not in the axial direction with their faces abut each other, as otherwise an over-determination vorläge. For positioning It is crucial that the ring collars of the ring parts to the faces of the ball bearing inner ring, so in this way the exact axial spacer design guaranteed is.

to Attachment of the ring parts on the ball bearing inner ring can according to a first embodiment be provided with the present invention that the ring parts with in circumferential grooves inserted elastic rings with oversize, so they are a bit over at rest survive the outer peripheral surfaces of the ring parts, are pressed into the ball bearing inner ring. By this pressing of course no kind of impairment the very well set radial clearance of the camp, since this yes only very small forces have to be spent to compress the rubber ring elastically.

at a second embodiment The invention can be provided that the ring parts with each other provided remote front ends, of which at least one with an open to the mating ring part, an elastic ring with excess receiving Circumferential groove is provided. Also in this case, the attachment takes place the ring parts in the ball bearing inner ring by an elastic ring, For example, a round cord rubber ring od. Like., However, where here such a ring is enough the two together the spacer forming ring parts elastic holds together in a clamped manner so of course also the holder on the ball bearing inner ring is achieved.

at a third embodiment The present invention provides that the ring parts Ferromagnetic material, and that in the front page a ring member embedded a preferably continuous permanent magnet is.

Finally lies It is also within the scope of the invention between the inner end faces glue the ring parts on a compressible ring disk. Instead of the initially mentioned game air between the ring parts of the spacer you have the course here in the same way functioning compressible annular disc. Also So here is no measure over determination to fear.

Short description the drawings

Further Advantages, features and details of the invention will become apparent the following description of some embodiments and with reference the drawing. Showing:

1 a section through a deflection roller according to the invention with stud fastening on the engine,

2 a partial section through a modified Umlenkrollenbefestigung, in which each ring member of the spacer is mounted separately on the ball bearing inner ring via an elastic rubber ring,

3 one of the 2 corresponding section through an embodiment with magnetic support of the ring parts of the spacer to each other and

4 an embodiment in which the ring parts of the spacer are connected by a glued between them compressible annular disc.

Detailed description the drawings

In the engine of which in 1 only the outer contact surface 1 It can be seen is a stud 2 screwed in, with the help of this, as well as an externally screw-on nut 3 , a pulley 4 should be attached accurately. For this purpose is a spacer 5 consisting of a first ring part 5a with a ring collar 6 that is at the frontal area 18 abuts and a second ring part 5b with a ring collar 7 that is at the frontal area 19 is provided for. This spacer compensates for a tolerances between the inner bore of the ball bearing inner ring 8th and the outer periphery of the stud 2 from and to the other it acts by the length training of the ring part 5a as a spacer to the engine.

In order to simplify the assembly, according to the invention, the design is such that the two-piece spacer 5 before fixing on the stud 2 is connected to the pulley, specifically by a releasable support on the ball bearing inner ring 8th ,

For this purpose, according to the embodiment 1 the ring part 5a with an outer twist 9 and the ring part 5b with a corresponding internal rotation 10 provided so that the two parts with slight radial play can overlap each other. In this area is the offset front end 11a of the ring part 5a with a circumferential groove 12 provided in which an elastic ring 13 For example, a Rundschnurgummi, is inserted with slight oversize, so when stacking the front ends 11a and 11b the elastic ring 13 must be radially compressed and thus a clamp of the ring parts 5a and 5b is given to each other.

According to the embodiment 2 are the two ring parts 5a ' and 5b ' each separately with the help of in grooves 12 ' inlaid elastic rings 13 ' directly on the inner surface of the ball bearing inner ring 8th supported.

According to the embodiment 3 are the two ring parts 5a '' and 5b '' sharing the spacer 5 form, made of ferromagnetic material. In the front page 14 a ring member, in the present case of the ring member 5a '' , is a permanent magnet 15 inserted so that when attaching the ring parts from the left and right to the ball bearing of the pulley 4 the two ring parts are held together by the magnetic attraction.

The 4 finally shows a Ausführungsbeispie, in which between the end faces 14 of the ring part 5a ''' and 16 of the ring part 5b ''' a compressible ring disk 17 is glued.

1

engine

2

studs

3

mother

4

idler pulley

5

spacer

5a

first ring part

5b

second ring part

6

collar

7

collar

8th

Ball bearing inner ring

9

outer twist

10

inner Abdrehung

11

Front end of the ring part 5a

12

groove

13

elastic ring

14

End face of the ring part 5a

15

permanent magnet

16

End face of the ring part 5b

17

compressible washer

18

face

19

face

Claims (6)

Pulley for use in control and aggregate drive of internal combustion engines with an attachment to the engine block by means of stud bolts and nut, as well as with a distance piece between Stud bolt and inner bearing bore, characterized in that the spacer ( 5 ) of two on both sides of the ball bearing ring ( 8th ), with protruding annular collars ( 6 . 7 ) at its end faces ( 18 . 19 ) and in the axial direction of the roller ( 4 ) having play opposing each other, releasably on the ball bearing inner ring ( 8th ) held ring parts ( 5a . 5b ) consists. Deflection pulley according to claim 1, characterized in that the ring parts ( 5a . 5b ) with in circumferential grooves ( 12 ' ) inserted elastic rings ( 13 ' ) with oversize in the ball bearing inner ring ( 8th ; are pressed. Deflection pulley according to claim 1, characterized in that the ring parts ( 5a ' . 5b ' ) with mutually overlapping offset front ends ( 11a . 11b ), at least one of which ( 11a ) with one to the mating ring part ( 11b ) open an elastic ring ( 13 ) with oversize receiving circumferential groove ( 12 ) is provided. Deflection pulley according to claim 1, characterized in that the ring parts ( 5a '' . 5b '' ) consist of ferromagnetic material, and that in the front side ( 14 ) of a ring part ( 5a '' ), preferably rotating, permanent magnet ( 15 ) is embedded. Deflection pulley according to claim 1, characterized in that between the inner end faces ( 14 . 16 ) of the ring parts ( 5a ''' . 5b ''' ) a compressible annular disc ( 17 ) is glued. Pulley according to one of claims 1 to 5, characterized in that the one ring part ( 5a ) with an appropriate distance extension for installation on the engine ( 1 ) is provided.