DE2325399A1 - BEARING ARRANGEMENT WITH A BEARING RING - Google Patents

Description

Bearing arrangement with a bearing ring

The invention relates to a bearing arrangement and an associated one Bearing ring, which consists of an approximately tubular wall of substantially annular cross-section, which has a radially inner and a radially outer bearing surface. Will be such a bearing ring Used in a bearing arrangement in which a trunnion part (such as the drive pinion of a rack and pinion drive assembly) with respect to a common axis

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in an associated housing (e.g. the pinion housing) should rotate, the bearing ring is coaxial with the shaft between the shaft and a suitable seat built into the housing so that either the shaft is in the inner Bearing surface of the bearing ring, which is fastened in this Pail opposite the housing, or the shaft and the The bearing ring is opposite the housing on the outer bearing surface of the bearing ring, which in this case leads to a common rotary movement is attached to the shaft, can rotate.

If in a conventional simple embodiment a bearing ring, such as. B. a cylindrical piece of pipe made of phosphor bronze, an effective storage surface for the Shaft is to be provided, experience shows that it is necessary to provide the seat for the bearing ring in the housing Section of the shaft that receives the bearing ring, and also the bearing ring itself with very small tolerances to edit. Such preparation of the bearing ring and its seating surfaces on the shaft and in the housing requires a high expenditure of time and high costs.

The invention is therefore based on the "object of a bearing ring to create, in which the production of such tight tolerances can be dispensed with.

Based on a bearing ring of the type described in more detail at the outset, this object is achieved according to the invention in that a number of slots are provided which are mutually spaced extend axially the length of the wall so that the slots alternate in the outer bearing surface and in the inner Bearing surface are arranged, the slots in the outer bearing surface extending from this substantially radially extend inwardly towards the inner bearing surface and the slots in the inner bearing surface essentially expand

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from this radially outwards to the outer bearing surface extend out so that the bearing ring to smaller radial Is capable of deformation.

The invention also provides an improvement in a bearing arrangement with a pin part and a housing, which are intended to rotate about a common axis relative to each other to turn. The improvement is according to the invention in that a bearing ring marked in the preceding paragraph is provided which is mounted on a shaft of the journal part mounted and arranged coaxially between the shaft and the housing.

As a result of the aforementioned radially extending slots the wall of the bearing ring according to the invention closes when the bearing ring is installed between a housing and a shaft Capable of minor radial deformations, so that minor irregularities in the machining of the Surface of the bearing ring seat in the housing or the surface of the shaft or both surfaces are balanced. In practice, the Y / and of the bearing ring provides an arrangement of circularly distributed pivotable sectors that can be moved radially outwards or inwards, wherein the slots open or close and the diameter of the bearing ring increases or decreases, what the The bearing ring allows its inner and outer bearing surfaces to be attached to the shaft and the Adapt housing.

To facilitate the radial deformation of the bearing ring, one of the bearing surfaces is preferably either the inner one or the outer one, arranged on an approximately tubular sleeve. The easiest way is to use a single cuff an annular body of approximately circular cross-section as

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^ made one piece so that these two are contiguous Moldings form the wall of the bearing ring ". The sleeve is designed so that it can deform radially with respect to the ring body, in the longitudinal direction the ring body covered and arranged radially at a distance from him, so that when the bearing ring between a Y / elle and a housing is installed, the sleeve is in addition to the aforementioned radial displacement of the wall as a whole, as a result of the radial slots, can bend radially inward relative to the annular body of the wall.

An adjustment of the diameter of a bearing surface or both bearing surfaces of the bearing ring can be achieved in that the bearing ring is mounted on a cylindrical shaft and then axially displaced on the shaft so that the outer bearing surface slides in a seat in the form of a conical inner surface of the housing which is substantially coaxial with the shaft. During such sliding movement, the wall of the bearing ring is displaced radially near the inside until the bearing ring has conformed to the seats in the housing and on the shaft with any reasonable tolerance required. When the bearing ring is inserted, it can be secured axially, for example by clamping it against the housing and the shaft. If necessary, the bearing ring can have a tapered outer bearing surface so that it mates in a substantially complementary manner with the tapered seat in the housing. Thereby undergoes s during the relative axial movement of these two surfaces zwisohen radial deformation between the housing and the shaft.

While on the one hand by the bearing ring according to the invention the assembly of a bearing is facilitated, on the other hand, it also forms a simple means of

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to seal assembled bearings. In order to provide the required adjustment of the bearing ring ₉ , the bearing arrangement can contain a device for radial adjustment of the wall of the bearing ring, with the aid of which the diameter of at least one of its bearing surfaces can be changed relative to the axis of the shaft. Goal "Preferably there is such a setting of an axially adjustable member having a conical surface which is arranged coaxially to the axis of the shaft and having a complementary conical surface of the bearing ring, which is normally one of the bearing surfaces _s is in sliding engagement in the manner ;, that when An axial adjustment movement of this adjustable member causes the conical surfaces to slide on each other9 whereby the wall of the bearing ring tends to move radially inwards or outwards _β 14 143/71 »The axially adjustable member can be carried by the journal part or by the housing» In the former case the conical surface of the adjustable member is preferably with an inner conical surface of the ring and in the latter case with an outer conical en surface of the ring in sliding engagement.

Although the wall of the bearing ring is generally designed as a closed one-piece ring, it may occasionally be necessary, for example to facilitate the placement of a bearing ring on a shaft between two radially protruding flange parts, the wall of the one-piece ring in particular radially between the inner and outer separate Lagerfläohe so that daduroh the bearing ring can be opened for mounting werdtn ₀ Here, Na

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of course, provided that the material of the bearing ring sufficient deformation allows · Experience has shown that it is; however not always possible to use one of these as mentioned above To mount separated or unseparated rings on a shaft. The invention therefore also comprises an arrangement in which the wall of the bearing ring is composed of at least two individual wall parts, the cross-section of which is essentially ring sector-shaped and which are intended to be in the assembled state between the Housing and the shaft to be held and together the. to form tubular wall »

Suitable materials for the bearing ring will select the expert in regard to which elasticity and flexibility which frictional behavior or what other properties the camp requires under test conditions, however, proved plastics ₀ to be particularly powerful as Uylon ₉ acetal or engineering plastics such. B. The plastic marketed by Imperial Chemical Industries ^ Ltd. under the name "Kematal".

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Various exemplary embodiments of the invention in front of the door are described in greater detail below with reference to the drawing described. In detail shows

Pig. 1 is a plan view of a bearing ring according to a first embodiment of the invention,

Pig. 2 is a side view of the in Pig. 1 shown ring,

Pig. Figure 3 shows a section through part of the ring shown in Pig «1 along section line A-A of Pig. 1,

tfig. 4 is a plan view of a bearing ring according to a second Embodiment of the invention,

Pig. 5 is a plan view of a bearing ring according to a third Embodiment of the invention,

Pig. 6 shows a sectional view of a rack and pinion drive with a bearing arrangement ₉ according to the invention, this containing the bearing ring shown in Pig _{0 1 and}

Pig. 7 one of the pig. 6 similar representation of part of a modified rack and pinion drive, the one Contains bearing arrangement with a bearing ring corresponding to that shown in Figures 4 or 5.

As far as possible, the same parts or members are included in the individual figures throughout the following description provided with the same reference numbers.

In Piguren 1 to 3, the bearing ring 1 is made as one piece, made of an engineering plastic and consists of a tubular ¥ and _s normally annular cross-section, with an inner bearing surface 3 and an outer bearing surface 4. The wall 2 consists of an annular body 5 and an integrally formed tubular sleeve the sleeve is positioned at a distance radially outwards around the ring body 5 around, is substantially coaxial therewith and extending in the axial direction such that it covers the annular body. 5 At the free end of the

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Cuff 6 is formed with a bead 7 which extends over the entire circumference of the cuff and its profile crown forms the outer bearing surface 4 of the bearing ring. The generally annular portion 6a (Pig. 3) of the sleeve 6, which connects this to the ring body 5, is considerably thinner than the cross section of the ring body 5, so that consequently the cuff 6 (and partially its bead 7) is radially deformable and extends towards the ring body 5 or lets bend away from this.

The inner bearing surface 3 consists of two concentric conical surfaces 3a and 3b which are axially opposite one another and their smaller diameter ends are adjacent to each other. .

The Y / and 2 has a number of evenly distributed slots and 9, which extend in the axial direction over the entire length of the wall «The slots 8 open into the outer bearing surface 4 and the slots 9 in the inner bearing surface 3, the arrangement being made so that on Perimeter of the ring the slots' 8 and the slots 9 together alternate and each slot is diametrically opposed to another slot of the same type. The depth of each one The slot 8 or 9 is less than the radial thickness of the wall 2, and each slot extends with respect to the Axis of the bearing ring radial. As shown in Fig. 3, the slots 9 extend through the ring body 5. Your Depth is equal to the radial thickness of the ring body. Consequently can the wall 2 of the bearing ring as a circular arrangement of wall parts with a substantially sector-shaped Cross-section can be viewed, with two adjacent wall parts covered by a relatively thin plastic teg 10 are connected to the closed inner or outer end of the respective slot 8 or 9 remains.

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Thanks to the construction of the bearing ring described above, the wall parts lying between adjacent slots 8 and 9 swivel around the plastic webs when the wall 2 is subjected to forces acting radially on its outer bearing surface 4, so that the diameter of the bearing ring is reduced. Conversely, if the inner bearing surface 3 is subjected to forces directed radially outwards, then the wall parts fold apart and the diameter of the bearing ring becomes larger. In addition, forces directed radially inward, which act on the outer bearing surface 4, can bend the sleeve 6 radially inward with respect to the ring body. These two possibilities of movement set the bearing ring repaired, radially slightly to deform "The plastic material of the bearing ring preferably has a sufficient degree of elasticity that the wall 2 after Y / egnahme the deforming" Radial forces returns to ensure ₉ in their Uormalstellung.

In the second embodiment of a bearing ring shown in Pig · 4, the wall 2 is similar to that in Pig. 1 formed as one piece, but in this example it is split as shown at the point indicated by 11. The gap 11 runs radially from the inner 3 to the outer bearing surface 4 and axially over the entire length of the bearing ring. Because of this complete split, the V / And of the Hinges can be opened by a pivoting movement about the web 10, which is diametrically opposite the gap 11; Such a bending open of the bearing ring may be necessary in order to facilitate its mounting on a shaft. As can be seen from Fig. 4, 'the gap 11 is at a point where a slot 9 would otherwise be, and the bearing ring naoh Pig. 4 accordingly also arises from the bearing ring shown in Pig · 1 in that one of the

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Slots 9 are extended and so the web 10 on the radially outside lying end of this slot is cut.

The one in Pig. 5 shown embodiment is the wall 2 of the bearing ring by joining two separate ones Wall parts 2a and 2b formed. These parts have a substantially semicircular cross-section and result, when they are opposite each other, a bearing ring with aligned diametrical gaps 11 and 12. The bearing ring according to Hg. 5 accordingly arises from the bearing ring shown in Fig. 1 daduroh that the plastic webs 10 cut through at the radially outer ends of two diametrically opposite slots 9 will. The bearing ring according to the embodiment of FIG. 5 is intended to be placed around a Y / elle and can be used, for example, in cases in which the material of the bearing ring or the available assembly space requires the application of one of the in Do not allow the bearing rings shown in Fig. 1 or 4 on the shaft *

It should be noted that in each of the FIGS. 1, 4 and 5 shown embodiments of bearing rings the slots 8 and 9 symmetrically about the axis of the bearing ring are arranged, with two slots 9 and two each Slots 8 form a diametrical line. In the examples according to FIGS. 4 and 5, the column 11 and 12 occur in this respect in place of the slots 9. Although such a symmetrical arrangement is not essential for the invention is, it is preferable because it causes the inner and / or outer bearing surface 3, 4 an im undergoes substantial symmetrical enlargement or reduction of the Durohmesser when it is radially outward or is subjected to forces directed radially inward,

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those on the inner or outer bearing surface are symmetrical attack.

In the following, applications of the devices shown in FIGS bearing rings shown :: considered in the context of bearing arrangements, those shown as parts of those shown in FIGS Rack drives are installed. Each of the rack and pinion drives contains a pinion 13 ″, which is in with a mutual axially spaced bearing assemblies 14 and 15 is rotatably mounted in a housing 16. The ones shown Rack and pinion drives are specifically designed for use in a vehicle steering gear. A cylindrical one Shaft part 17 of the pinion protrudes from the housing. It is for non-rotatable coupling with a steering wheel or the like. same provided with a spline. The teeth 13a of the pinion mesh in a known manner with the teeth of a Toothed rack 18 which can be longitudinally displaced through the housing 16 is. It is held in engagement with the pinion 13 by means of a spring-loaded yoke 19 » which is displaceable in a bore of the housing and held in this by means of a threaded plug 20.

The bearing assembly 15 is a conventional phosphor bronze or plastic bearing in which the pinion rotates and that, as shown, gives only radial support to the shaft part 17 of the pinion.

The bearing arrangement H contains the bearing ring 1 according to the invention and serves to limit the radial movement as Support bearings for the axial localization and, if necessary, for the radial localization of the pinion 13 in the housing 16.

According to FIG. 6, the bearing arrangement 14 contains three annular collars 21 to 23 which are mounted on a cylindrical shaft stub 24 of the pinion are arranged. The three ring collars are on

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the stub shaft 24 held together by means of a nut 25 acting via a washer 26, which the ring collar presses against a shoulder 24a of the pinion. The annular collar 22 causes a certain axial distance between the annular collars 21 and 23, which axially opposed conical running surfaces 21a and 23a, respectively have, which are arranged coaxially to the pinion axis and the ends of which are smaller in diameter facing each other. The two ring collars 21 and 23 are common Rotation with the stub shaft 24 fixed on this in that the nut 25 exerts a clamping effect. she . but can, if necessary, also be positively locked against rotation on the stub shaft.

The bearing ring 1 according to the invention shown in FIGS. 1 to 3 lies between the annular collars 21 and 23 and extends around the stub shaft 24. The bearing ring is placed on the stub shaft 24 before the annular collar 21 j attaches the washer 26 and the nut 25. ^ inserts, and its inner bearing surfaces 3a and 3b are in sliding contact with the complementary conical running surfaces 21a and 23a, respectively, of the ring collar. When assembling the bearing arrangement 14, the bearing ring 1 is received by a bearing seat which is formed by an essentially cylindrical bore 27 in the housing 16. At the beginning of the inner area of the bore 27 in the axial direction, the diameter protrudes radially inward relative to the outer area provided with a thread. The bearing ring 1 is held against axial movement in the bore 27 between a radial shoulder 29 of the bearing seat and the inner end of a screw cap 30. The screw cap 30 engages with the thread 28 and is screwed into the housing 16; axial movement with respect to the housing 16, the bearing ring 1 is thus through

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the clamping effect between the cap 30 and the shoulder secured, and when sioh the pinion 13 rotates, then slide its running surfaces 21a and 23a on the inner bearing surface of the bearing ring, which is formed by the surfaces 3a and 3b will.

The foregoing description shows _s that if there are with reference to the Figures 1 to 3 any minor irregularities in the profile of serving as a bearing seat bore 27 or to the shaft stub 24 ₉ the wall of the bearing ring, in particular the Manschette.6, during assembly of the bearing assembly 14 can expand, contract or bend in order to adapt to the profile of the seat surfaces of the bearing ring within a wide tolerance range.

If it is al & necessary prove ₉ the play of the bearing 1 and so as to adjust its axial and radial lührungswirkung to the pinion 13 ₉ then it is only necessary to replace the distancing ring collar 22 having such different length _β Thus, the collars are caused 21 and 23 to move asial towards or away from each other and thus move the wall 2 of the bearing ring 1 radially outwards or inwards, the structure of the bearing ring 1 making it possible to adapt to the new dimensions, although a spacing ring collar 22 is to be preferred, such a collar is not decisive, since the ring collars 21 and 23 can also be held in their axially distant position simply by resting on the bearing ring 1 © and changed dec ⁵ Iteeaxaesser of the bearing ring 1.

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The exemplary embodiment according to FIG. 7 differs from that shown in Mg. 6 primarily in that the ring collars 21 to 23 replace a single collar 31 are whose profile on the outer circumference essentially coincides with the profile that the axially distanced represent conical running surfaces 21a and 23a in FIG. The collar 31 is for common rotary movement with the stub shaft 24 attached to this "and can, for example, be pressed onto the shaft stub, welded or glued to it. or be positively connected »Alternatively, the profile of the radially outer, represented by the collar 31 Surface also incorporated into the pinion 13 and thus form a piece with it.

It is unlikely that the one shown in FIGS Bearing ring 1 consists of such an elastic material that it extends its diameter 2 over the collar 31 is pulled and between the opposing conical running surfaces can be inserted. the end For this reason, the bearing ring 1 shown in FIG. 7 is designed similarly to that shown in FIG. 5. The two wall parts 2a and 2b are joined together around the collar 31 before the pinion 13 is installed in the housing 16. That Pinion and the assembled bearing ring 1 are then inserted axially through the bore 27 into the housing until the outer bearing surface 4 "of the bearing ring is the desired one Location at the end of the bore 27 is located. Then the screw cap 30 screwed into the housing to the two wall parts 2a, 2b of the bearing ring 1 against the shoulder 29 in the Press housing.

With the prerequisite that the material of the bearing ring in FIG. 4 has sufficient elasticity to make it possible; to expand the wall 2 so far ₉ that they over the

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Collar 31 can be pulled and inserted between the opposing bearing surfaces without impairing the bearing properties _? the two-part bearing ring 1 j as described above and used in the arrangement according to FIG. 7, by means of a bearing ring accordingly
that shown in Pig, 4 can be replaced.

Expectations

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Claims (1)

r ü ο h e 1J bearing ring, "consisting of an approximately tubular wall of essentially annular cross-section and with a radially inner and a radially outer bearing _{surface 9,} characterized in that a number of slots (8j9) are provided, which extend axially over the Length of the wall (2) extend. That the slots are arranged alternately in the outer bearing surface (4) and in the inner bearing surface (3), the slots (8) in the outer bearing surface essentially extending radially inward from this the inner bearing surface and the slots (9) la of the inner bearing surface extend essentially from this radially outward to the outer bearing _{surface 9} so that the bearing ring (1) is capable of minor radial deformations o 2 _a bearing ring according to claim .1 _s characterized in that the wall consists of an annular body (.5) and an approximately tubular sleeve (6) molded onto it _? the annular body opposite radially deformable and one of the two bearing surfaces bear _s and that the collar substantially concentrically disposed about the annular body ", extending in the longitudinal direction and the ring body at a radial distance überdeckt.- 3. Bearing ring according to claim 2, characterized in ₉ that the sleeve (6) surrounds the ring body (5) on the outside and carries the outer bearing surface (4), 4. Bearing ring according to one of claims 2 or 3 _9, characterized in that the sleeve (β) has an on 3098A8 / 0B63 free end or near the free end Has bead (7), which runs about over the entire circumference of the cuff and the bearing surface (4) or at least formed part of the bearing surface on the cuff 5 _e bearing ring according to one of the claims _s . characterized _s that said outer bearing surface conically shaped · = 6. Bearing ring according to one of the preceding claims, characterized in that the inner bearing surface (3) has at least one conical surface (3 a _{9 3 b} ) _? that is with a substantially complementary conical surface (21a ₉ 23a) of a shaft (24) _s gusammenpaßt on which the bearing ring (1) mounted " Ye bearing ring _{according to claim β 9,} characterized in that the inner bearing surface (3) is formed by two coaxial ₉ axially opposite conical surfaces (3a _s 3b). 8. Bearing ring according to claim 7 _S, characterized in that the ends of smaller diameter of the two conical surfaces (3a _s 3b) facing each other © ind " 9. bearing ring according to one of the preceding claims ,. characterized; that the slots (8 _P 9) are distributed essentially symmetrically over the circumference of the wall (2). 10. Bearing ring according to claim 9 _S, characterized in "that; each slot in the land" (2) is diametrically opposite to another slot of the same Tj $ b (8 or _o 9) « 30 9848/0 56 3 11. Bearing ring according to one of the preceding claims, characterized in that the wall (2) is formed in one piece and separated at one point by a gap (11) running from the inner (3) to the outer surface (4) is. 12 «bearing ring according to claim 10 and 11, characterized in that that the wall (2) is separated at one point, -an which would otherwise be a slot (9) extending radially outward from the inner bearing surface " 13 «. Bearing ring according to any one of claims 1 to 1O _S characterized in that the wall of at least two discrete wall parts (2a, 2b) is composed of ₉ have a substantially annular-sector-shaped cross-section _o 14. Bearing ring according to claim 13 _S, characterized in ₉ that the wall (2) is formed from two wall parts (2a, 2b),. 'Whose gaps (11, 12) lie essentially on a diameter line of the wall. 15. Bearing ring according to claim 1O ₅₁ 13 and 14 »characterized in that the gaps (.11, 12) are at points where otherwise two diametrically opposed slots (9) of the same type would be. 16. Bearing ring according to one of the preceding claims, characterized in that it consists of a plastic. 17. Bearing arrangement with a journal part and a housing which are intended to rotate relative to one another about a common axis ^ characterized in that a bearing ring (1) according to one of the preceding An = 8/0563 Proverbs is provided on a shaft (24) of the trunnion part mounted and arranged coaxially between the shaft and the housing (16) » 18 «, bearing arrangement according to claim 17 _S characterized in that an adjusting device (21 ₉ 25) is provided for the radial adjustment of the viand (2) of the bearing ring, the diameter of at least one of its bearing surfaces being opposite to the axis of the - Wave is changed ₀ 19o bearing arrangement according to claim 18 ", characterized in that the adjusting device comprises an axially adjustable member (21) _P which has a conical surface (21; γ, is essentially concentric to the shaft axis and with an essentially complementary conical surface (Yes) of the bearing ring is in sliding _{engagement 9} in such a way9 that with an axial adjustment movement of this member the conical surfaces slide on one another ₉ where · = the wall of the bearing ring was displaced radially through itself 2Oo bearing arrangement according to claim 19 »characterized in that the journal part (13) is the axially adjustable Member (21) carries and its conical © surface (21a) with an inner conical surface of the bearing = ring (3a) is in sliding engagement " 21. Bearing arrangement according to claim 1S ₂ ¹ characterized = characterized ₉ that the housing (16) carries the axially adjustable member (21) and that its conical surface (21a) with an outer conical Oberfläoh © (3a) of the bearing ** ring in Sliding engagement 309848/0563 22. Rack and pinion drive arrangement with a drive pinion, daduroh characterized in that a bearing arrangement (H) according to one of claims 17 to 21 is provided is. 309848/0563 Blank page