DE3332170A1 - Device for the rotatable mounting of a spindle in a spindle-holding tube - Google Patents

Abstract

In a steering bearing of a cycle, the two bearing races, with the rolling elements accommodated between them, and parts of a screwed locking means form a preassembled subassembly. <IMAGE>

Description

Patent Attorneys Dipl ^ Ing.'tL-Vejck ^ -ann ;, Djpl.-Phys. Dr. K. Ingke DiPL.-Ing "." F. A. WEicKMÄNNrDlPL Dr.-Ing. H. LiSKA Of, J.Prechtei

G-

33 321 70 POST BOX 860 820

8000 MUNICH 86 Qt SSP, 1983

MÖHLSTRASSE 22

TELEPHONE (089) 980352

TELEX522621

TELEGRAM PATENTWEICKMANN MUNICH

CSCH

Deutsche Star Kugelhalter GmbH Ernst-Sachs-Strasse 90

8720 Schweinfurt 1

Device for the rotatable mounting of a spindle in a spindle receiving tube

The invention relates to a device according to the preamble of claim 1. Such a device is used in particular for mounting the fork tube a front fork of a bicycle in the front substantially vertical frame tube of the Bicycle frame.

The fork tube of the front fork of a bicycle is conventionally in the tube of the bicycle frame that receives it stored as follows: the lower bearing part is formed by a fixed to the fork Inner ring, an outer ring fixed at the lower exit of the frame tube and an in

a cage-enclosed set of balls. The running surfaces of the inner ring and the outer ring are radially offset, i.e., they face each other in a direction inclined to the axis of the fork tube (angular contact ball bearings) .

The upper bearing corresponds to the preamble of claim 1. The pipe-side, i.e. in the Bicycle case, frame tube-side bearing ring pressed into the frame tube and the spindle-side, i.e. in Bicycle case, bearing ring on the fork tube side screwed to the fork tube. Between these bearing rings is loose a set of balls held in a cage is used. The bearing ring on the fork tube side is thus secured, that it is overlaid by an annular washer which has a radially inner projection engages in a longitudinal groove of the fork tube and that a lock nut on the thread above this washer of the fork tube is screwed, which the washer against the fork tube side bearing ring presses.

The disadvantages of this known embodiment, in particular in the case of the upper bearing are the large number of individual parts and the resulting Installation effort for the user.

The invention is based on the object of designing a device of the generic type so that the The number of individual parts is reduced and assembly is simplified.

The measures according to the characterizing part of claim 1 serve to solve this problem.

In the solution according to the invention, the entire structural unit be screwed onto the spindle, the tube-side bearing ring then engaging the tube occurs. This engagement can be designed as a plug-in seat according to claim 2. Thanks to the pre-assembly of the bearing rings, it is not even necessary to arrange the rolling elements, in particular balls, in a cage, so that the cage saved and at the same time the load rating and thus the service life can be increased due to a larger number of balls. The elimination of the cage results in additional savings in manufacturing costs. While in the known embodiments, the bearing rings are basically made of metal, making their production more expensive and difficult and in addition, their weight is increased, the invention further proposes that the bearing rings from Are made of plastic and that they are equipped with bearing ring shells made of metal with raceways for the balls. As a result, not only is the weight reduced, the production easier and the price reduced, but also it is also the prerequisite for easy snapping together according to claim 4 is created.

Claim 5 shows a form-technically favorable embodiment for the production of the snap connection on.

Due to the measure of claim 7, double fit problems avoided.

Screw locking devices based on a lock nut and an intermediate washer are not reliable, especially because one does not a reliable and even suit of the counterattack ^ mother can count on during assembly. The invention therefore wants to continue to secure against unauthorized ' Improve the screw connection and suggests the measure

333217C

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men according to claim 8 before.

A preferred embodiment of the screw lock results from claims 9 to 11. In this embodiment, the screw connection with. relatively little effort to be tightened in the sense of the mutual approach of the bearing rings. In contrast, the bearing ring on the spindle side can no longer be screwed back relative to the spindle in the sense of a distance between the bearing rings. Of course, the division of the snap elements must be such be set to the height of the screw connection so that the bearing pressure is set as sensitively as necessary can be.

As a rule, when repairing or servicing a bicycle, it is only necessary to align the bearing rings with one another to approximate, namely when the career paths are widened or knocked out after a long period of operation. This is easily possible with the type of screw lock provided according to the invention. One must Make sure, however, that the bearing rings are not overstrained with one another because they will screw back of the bearing ring on the spindle side is prevented because of the design of the snap-on elements. To all the same remove the spindle from the pipe if necessary, for example if by carelessly tightening the screw connection The two bearing rings are clamped too tightly between the spindle and the bearing ring on the spindle side have been, the measures according to claims 12 and 13 are proposed.

In order to ensure that the bearing is covered as tightly as possible despite these measures, the measure proposed according to claim 14.

The measures according to claim 15 facilitate the release of the snap elements.

~ 40

Claims 16 to 19 show a further embodiment for the screw connection.

The training according to claim 20 ensures a four-point contact of the balls on the associated raceways and extensive avoidance of bending stresses in the bearing rings.

Another solution, which is simpler in terms of production technology and therefore cheaper, results from the claim 21. '·

According to claim 22, the lower bearing point can also be used when storing the front fork of a bicycle be designed according to the above aspects.

The accompanying figures explain the invention on the basis of exemplary embodiments; it represent:

1 shows a longitudinal section through the upper steering bearing of a bicycle steering system;

FIG. 2 shows a section along line II-II of FIG. 1;

3 shows a modification of FIG. 1 with regard to the design of the raceways;

FIG. 4 shows a modification of FIG. 1 with regard to the design of the screw connection lock; FIG.

Fig. 5 is a section along line V-V of Fig. 4; 6 shows a section along line VI-VI of FIG. 4; 7 shows a modification of FIG. 4;

FIG. 8 shows a section along line VIII-VIII of FIG. 7;

9 shows a section along line IX-IX of FIGS. 7 and

Fig. 10 the fork tube mounting of a front fork of a bicycle, the upper headset in view and the lower in longitudinal section is shown.

In Fig. 10, the front frame tube of a bicycle frame is denoted by 10 and the fork tube is a Front fork 12 is denoted by 14. This fork tube 14 appears in claim 1 under the designation "spindle".

The fork tube 14 is in the front frame tube 10 supported by a lower steering bearing 16 and an upper steering bearing 18. In claim 1 is so far of a lower bearing 16 and an upper bearing 18 the speech.

The lower steering bearing 16 consists of two bearing rings 20 and 22, with the bearing ring 20 centered on the bicycle fork 12 and the bearing ring 22 on the frame tube 10 is centered. The two bearing rings 20 and 22 are made of plastic and are snapped together. Between the bearing rings 20 and 22 are balls 24 up. take the ones in not shown ring shells Metal run. The metal ring shells are embedded in the plastic bearing rings, e.g. injected or snapped into place. Bearing rings 20 and 22 are supported against one another in the axial and radial directions by the balls 24 when the installation is completed is. In addition, the bearing rings 22 and 20 have radial and axial play against each other, but only so-

much that the balls 24 cannot fall out. The balls therefore do not need a special one To be caged.

The lower steering bearing 16 is characterized by easy assembly, low manufacturing costs and low Weight off.

The central tube can be seen at the upper end of FIG of a handlebar, which is designated by "26. This central tube 26 is in the usual way within the fork tube 14 stuck.

A first embodiment of the upper headset 18 is shown in FIG. This upper steering bearing comprises a tube-side bearing ring 28, which in the frame tube 10 is inserted and a spindle-side bearing ring 30, which through an external thread 32 of the fork tube 14 and an internal thread 34 of the bearing ring 30 on the spindle side is screwed to the fork tube 14. In the bearing rings 28 and 30, ring shells 36 and 38 made of steel are used, which have ball races with an ogival contour. The bearing ring 30 has an axial flange 40 which encloses a radial flange 42 of the bearing ring 28 and with a radially inwardly jumping one Rib 44 engages behind. The rib 44 is snapped over the radial flange 42 and "to this" Purpose provided with a bevel 44a. In the ring shells 36 and 38 balls 46 are added to the raceways 48, 50 bear with an ogival contour in four points.

The bearing ring 30 is in its upper part of two concentric Ring walls 52, 54 are formed. On the radially inner side of the annular wall 54 is an annular recess 56 provided. The ring wall 54 is at its upper edge

COPY ι

provided with notches 58. A support ring 60 is placed on the upper edge of the annular wall 54 and engages with the notches 58 in a rotationally fixed manner. Within the annular recess 56, torsion bars 62 extend from the support ring 60 and run axially downward and are designed as snap elements 64 at their lower ends. The snap elements 64 are shown in FIG. 2 in a cross-section normal to the axis. It can be seen that in the relaxed state, namely where they can engage in a recess 66 of the fork tube 14, they are spirally twisted, while outside the recess 66 they are wedged against elastic resistance between the annular wall 54 and the outer circumferential surface of the fork tube 14 so that they are represented there as ring segments which are essentially coaxial with the fork tube 14. It is seen from Fig. 2 without further ado that the bearing ring 30 with inserted supporting ring 60 and snap elements · can be rotated in a clockwise direction relative to the fork tube 14, wherein d spirally entangled Schnappelen ⁱ enteric 64 respectively from the recess 66 of the fork tube 14 out in denRingraum 56 step in between the annular wall 54 and the fork tube 14 and are rotated while twisting the respective torsion bar 62. The bearing ring 30 can therefore be screwed down with its internal thread 34 on the external thread 32 of the fork tube 14 (FIG. 1). If, on the other hand, an attempt is made to rotate the bearing ring 30 counter-clockwise with respect to the fork tube 14 (FIG. 2), this is prevented by the snap elements 64 spreading between the support ring 60 and the fork tube 14 at the location of the recess 66. A screwing up of the bearing ring 30 relative to the fork tube 14 is therefore prevented.

The bearing ring 30 is covered at the top by an annular cover 68 which is snapped onto the bearing ring 30 at 70 is and with a radially inward

Annular lip 72 rests against the central tube 26. Through this Ring cover 68, the interior of the upper steering bearing is covered. After removing the ring cover 68 are the snap elements 64 for a screwdriver or the like accessible, so that they can be pushed back from the spread position shown in FIG. 2 into a Position in which the bearing ring 30 can be screwed up relative to the fork tube 14.

To solve the upper steering bearing 18, after removing the cover 68, the Traqrinq .60 with the Snap elements 64 are pulled out in the axial direction upwards.

The embodiment according to FIG. 3 differs from that according to FIGS. 1 and 2 only in that the ring shells 36, 38 with an ogival track contour, have been replaced by ring shells 136, 138, which are at about 45 ° against the axis of the fork tube face each other and only present one contact point for the respective sphere. Also the bearing arrangement According to FIG. 3, forces can be transmitted in the axial and radial directions.

In the embodiment of FIG. 4 are on one Lamella carrier 260 radially inwardly directed lamellae 264 attached, the radially inner ends of which lie on a circle whose diameter is smaller than that Outer diameter of the fork tube 214. The lamellas 264 are beveled at their radially inner end at 265 at the top and bottom. The disk carrier ring 260 is with the bearing ring 230 by interlocking projections and recesses, as indicated in Fig. 5, in the axial and

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firmly connected in the peripheral direction. When screwing the bearing ring 230 onto the fork tube 214, the Lamellae 264 deflected, as shown in FIG. 5. When the fins 264 are level with the recess 266 come in fork tube 214, they snap into this recess into it, as also shown in FIG. Through the lamellas 264, which engage in the recess 266, and the inclined lamellae 264 prevent unintentional rotation of the bearing ring 230 in the The sense of removal from the bearing ring 228 is prevented. The bevels 265 are intended to be screwed on and unscrewing the bearing ring 230 from the fork tube 214 the transition of the slats over the upper one To facilitate the end of the fork tube 214 when screwing on and the transition over the upper edge of the recess 266 easier when unscrewing.

6 shows that the part of the carrier ring 26 0 located above the lamellae 264 is also lamellar is formed, namely with lamellae 261. These lamellae 261 are seen in the circumferential direction on gaps to the lamellae 264 for injection molding reasons .

The embodiment of FIG. 7 differs from 4 only in that the lamellae 364 are made in one piece with the bearing ring 330 are. Fig. 8 shows that the bearing ring 330 has radially directed slots 331 which are free for extraction protruding lamellae 364 are technically necessary, Fig. 9 shows next to the lamellae 364 a circumferential profile 333 of the bearing ring 330 recognize which of the application of a tightening torque by hand or by means of a tool serves.

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Claims (1)

Patent attorneys DiPL.-lN ^; G..H. "\ Ii ^r .EicKMANK," DiPL.-PHYS. Dr. K. Fincke Dipl.-Ing. R A. ¥ eickmann, Dipl.-Chem. B. Huber Dr.-Ing.H.Liska ft, j. 8000 MUNICH 86 POST BOX 860 820 MOHLSTRASSE 22 TELEPHONE (0 89) 980352 TELEX 522621 TELEGRAM PATENTWEICKMANN MUNICH CSCH PATENT CLAIMS 1. Device for the rotatable mounting of a spindle in.-ie4.nem spindle receiving tube, comprising at least two axially spaced bearing points in which the spindle opposite the spindle receiving tube is set axially and radially while maintaining the relative rotatability, with at least one a roller bearing assembly, in particular a ball bearing assembly, is provided with these bearings a tube-side bearing ring seated on the spindle receiving tube and one to be attached to the spindle spindle-side bearing ring and axially and radially supporting rolling elements, in particular ball ^ between the two bearing rings, the spindle-side bearing ring on the spindle by screwing means is arranged axially adjustable and wherein the screwing means by a screw connection can be locked against unintentional screwing, characterized in that the two bearing rings (28, 30) and the parts (60, 62) belonging to the bearing ring (30) on the spindle side, 64) of the screw lock (60-66) form a pre-assembled unit (18). k. Motor according to claim 2 or 3, characterized in that the channel (24) is formed in an upper side (22) of the valve seat ring (20) which lies in a plane perpendicular to the axis of the valve seat ring (20). 5. Motor according to claim 4, characterized in that a Seal between the valve seat ring (20) and the associated one Inner surface of the fold (21) is provided. 6. Motor according to claim I _9, characterized in that the passage is designed as a in the circumferential direction of the valve seat ring (20) extending and to the fold (21) through openings provided in the valve seat zring (20) towards a closed bore. 7. Motor according to one of claims 1 to 6, characterized in that that the fold (21) is connected to the water cooling system through openings (28) formed in the fold (21). 8. Motor according to claim 7 and 4, characterized in that with regard to the number and the arrangement of the openings (28) of the fold (21) and the openings (25) of the valve seat ring (20) at least four openings (28) of the fold (21) and openings (25) of the valve seat ring (20) independently of the angular position of the valve seat ring (20) with respect to the fold (21) are in connection with one another. 9. Valve seat insert for water-cooled internal combustion engines, characterized by an annular body (20) which can be fitted into a corresponding fold (21) in the motor and has two abutting one another and annular upper sides (22, 23) standing perpendicular to one another and one in the circumferential direction of the valve seat ring extending and in one of the upper sides (22,23) of the valve seat ring open passage for the flow of Engine cooling water through the passage. - 3 10. Valve seat ring according to claim 9, characterized in that the passage as a channel (24) in one of the upper sides (22)
is trained. 11. Valve seat ring according to claim 10, characterized in that
that the channel (24) when fitting into the fold (21) through
the associated inner surface of the fold (21) is closed
is. 12. Valve seat ring according to claim 11, characterized in that
that openings (25) are provided by the other
Guide the top (23) into the channel (24). 13 · valve seat ring according to claim 12, characterized in that U-shaped notches (2!) distributed over the circumference are provided as openings, which extend from the edge between the two Upper sides (22,23) extend out. 14. Valve seat ring according to claim 9, characterized in that the passage as one in the circumferential direction of the valve seat ring ' (20) extending and closed bores open towards the top of the valve seat ring (20) by means of openings: is trained. 15. A method for producing a water-cooled internal combustion engine with at least one cylinder and with this in Ve connection standing, valve-controlled inlet and outlet openings characterized, that part of the engine with an opening and.with a passage for the cooling water is poured that in the casting an annular, with the cooling water passage in communication fold is formed and that then a Ventilsi in the fold ring according to any one of claims 9 to 14 is fitted. - 4th INSPECTED 33321 14. Device according to claim 13, characterized in that that the snap elements (64) by an on the structural unit (18) preassembled but detachable ring cover (68) is covered. 15. Device according to one of claims 8 to 14, characterized in that the snap elements (64) on a support ring (60) are arranged, which, in the spindle-side Bearing ring (30) is inserted in a torque-locking manner, if necessary releasably. . 16. Device according to one of claims 8, 9, 12, 13, 14 and 15, characterized in that the snap elements are formed by substantially radially directed lamellae (264), which with their radially outer ends are fixed non-rotatably on the spindle-side bearing ring (230) and with their radially inner ends on the outer peripheral surface of the spindle (214) rest or - as far as they are in alignment with the spindle recess (266) - engage in this. 17. Device according to claim 16, characterized in that that the lamellae (364) are integral with the bearing ring (330) are produced. 18. Device according to claim 16, characterized in that the lamellae (264) from a lamella carrier ring (260) go out, which is inserted non-rotatably in the spindle-side bearing ring (230). 19. Device according to one of claims 16 to 18, characterized characterized in that the radially inner corner regions (265) of the lamellae (264) beveled or rounded are. -s- 333217G 20. Device according to one of claims 1 to 19, characterized characterized in that the raceways (48, 50) of the bearing rings (28, 30) ogival cross-sectional contour have, the ogival axis is arranged parallel to the spindle axis. 21. Device according to one of claims 1 to 19, characterized characterized in that the raceways (148, 150) of the bearing rings (128, 130) against each other in the radial direction are offset. 22. Device according to one of claims 1 to 21, characterized in that the other bearing point (16) of two including rolling elements, in particular balls (24) rvormonierten, in particular
snap-together bearing rings (20, 22), in particular made of plastic and possibly formed with metallic ring shells. 23. Device according to one of claims 1 to 22, characterized in that the spindle of the fork tube (14) a front fork (12) of a bicycle is formed. 24. Device according to claim 23, characterized in that the annular cover (68) with its radially inner Edge (72) on the central tube inserted into the fork tube (26) of a handlebar is applied.