EP2764189B1 - Spring mounting cone for a torsion spring having a torque-transmitting leg bent inward or outward - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION

The invention relates to a spring receiving cone having the features of the preamble of independent claim 1, a use of such a spring receiving cone and an arrangement with such a spring receiving cone.

In particular, such a spring receiving cone for unilateral connection of a Sektionaltorfeder for weight equalization in an industrial or garage sectional door is provided. By this is meant that the spring receiving cone serves as a so-called solid cone for fixing a spring end to a non-rotatable abutment or as a clamping cone for biasing and fixing the other spring end against and on a torsionally resiliently supported by the torsion spring shaft.

STATE OF THE ART

A spring receiving cone with the features of the preamble of independent claim 1 is known from US 2001/0039761 A1 known. This spring receiving cone is provided for pressing into a spring end of a torsion spring whose spring wire terminates in a radially inwardly bent torque transmission leg. For this purpose, the torque transmission arm is first inserted into a recess of a recess in a peripheral surface of the spring receiving cone, wherein the main axis of the spring receiving cone is angled relative to the spring axis of the torsion spring. Subsequently, the main axis is aligned coaxially to the spring axis and the spring cone is pressed with its peripheral surface in the spring end until the torsion spring abuts against the peripheral surface, radially outwardly facing and rotating around the entire peripheral surface projection. In this case, two flanks offset in the circumferential direction with respect to the recess enter between the spring coils of the torsion spring. This assembly of the known spring receiving cone is powerful and only possible with comparatively small axial extent of the peripheral surface. In the formation of this known spring receiving cone as a solid cone close two diametrically opposite, radially outwardly facing projections in the axial direction of the circumferential projection in which mounting holes are provided for attaching the hard cone to a non-rotatable abutment.

Also in another known solid cone with the features of the preamble of independent claim 1, two diametrically opposite, radially outwardly facing projections are axially adjacent to a peripheral surface provided in which mounting holes for attaching the fixed cone are provided on a non-rotatable abutment. These mounting holes have no specific position relative to the peripheral surface. To set the spring end of a torsion spring on this known solid cone, it is provided to heat the end of its spring wire and then press into the recess in the peripheral surface to form an engaging in the recess torque transmission leg. Although this procedure is likewise complicated, it is extensively practiced.

At one of the DE 43 41 309 C1 known spring receiving cone are adjacent to the peripheral surface which is to be inserted into the spring end of a torsion spring to be determined, two diametrically opposed, radially extending mounting holes with internal thread provided. In this mounting holes engage screws for two holding elements. The one holding element engages from the outside between the first two turns of the torsion spring in order to support it axially. The second holding element has, parallel to a through hole for the fastening screw, a recess through which a torsion transmission leg bent radially outward from the spring wire of the torsion spring is passed in order to support the torsion spring in the circumferential direction. An outwardly facing torque-transmitting leg can be easily already be formed in the manufacture of the torsion spring and does not need to be formed at great wire thickness with great effort, after a spring receiving cone has already been introduced into the spring end. On the peripheral surface of the known spring receiving cone no flanks are provided. The peripheral surface can be easily inserted axially into the spring end. However, then two retaining elements must be mounted, each with a fixing screw. In addition, the known spring receiving cone is complicated by its multi-part in the production and storage.

Another spring receiving cone for a spring end of a helical torsion spring with a radially outwardly bent torque transmission leg is from the EP 1 331 415 B1 known. Here, a flank-free region of the peripheral surface, which serves to support the torsion spring on its inner circumference, projects over from a securing element which has a recess for receiving the torque-transmitting arm. This recess is bounded in at least one direction about the peripheral surface by a stop surface for the torque transmission leg. The securing member with the abutment surface is a portion of a one-piece molding which also forms the peripheral surface of the spring receiving cone. If the recess is limited in only one direction around the peripheral surface by a stop surface of this molded part, a locking element is attachable to the securing element, that it closes the recess in the opposite direction of the stop surface. This locking element is a locking pin which engages in a fitting bore in the securing element. When mounting this known spring receiving cone proves to be at least in the case of larger wire sizes and correspondingly higher stiffnesses of the torsion spring as consuming to introduce the torque transmission leg in the recess in the fuse element, because the torque transmitting legs diametrically opposed to a simple axial screwing a securing element, from the Peripheral surface protruding flank between the spring coils of the torsion spring with the over the peripheral surface to the recess protruding parts of the securing element collides. In addition, this known Federaufnahmekonus by the peripheral surface of the overhanging fuse element is comparatively complex in its production, although it is in one piece to the locking element in the form of a simple locking pin.

From the DE 20 2009 001 535 U1 is a spring receptacle for a torsion spring, which is associated with a shaft of a door, in particular a sectional door or the like known. Here a straight torque transmission leg is fixed by means of force and form fit on or on the spring receiver. This just-executed torque-transmitting leg is tangent to the adjacent last turn of the torsion spring. It is encompassed by a clamping element and thus fixed to a flange of the spring receiver. For this purpose, a bore is provided in the flange, which runs parallel to the spring axis of the torsion spring at a radial distance from a receiving socket of the spring receiver, which supports the torsion spring in its inner circumference. The receiving socket is provided in a region shortly before the point at which the spring end of the remaining torsion spring, with an engaging between the two last spring turns flank.

From the WO 90/15216 a multi-part spring retainer 5 is known for a torsion spring, which has adjacent to a receiving socket a flange with radially extending to the receiving neck bores. The holes are provided on the one hand for connecting the flange with a rotatably mounted on a shaft to be supported counterpart in a desired rotational position. The screws 10 used in this case, on the other hand, secure an axial retaining element for a final turn of the torsion spring on the receiving socket or serve as a stop in the circumferential direction for a torque transmission leg projecting radially beyond the adjacent spring windings.

OBJECT OF THE INVENTION

The invention has for its object to ertüchtigten a spring receiving cone with the features of the preamble of independent claim 1 with the least possible effort for use with torsion springs having an outwardly bent torque transmission leg at its spring end.

SOLUTION

The object of the invention is achieved by a spring receiving cone having the features of independent claim 1, a use of such a spring receiving cone according to claim 13 and an arrangement with such a spring receiving cone according to claim 14. Preferred embodiments of the spring receiving cone according to the invention and the arrangement according to the invention are defined in the dependent claims.

DESCRIPTION OF THE INVENTION

In the case of the spring receiving cone according to the invention, a stop anchoring hole is provided in a radially outward-pointing projection radially spaced from the peripheral surface and designed to anchor a stop for an outwardly bent torque transmission leg of the torsion spring. This Anschlagverankerungsloch is always provided, even if a spring end of a torsion spring is fixed with an inwardly bent torque transmission leg on the spring receiving cone according to the invention. The unnecessarily operated in this case in the production of the new spring receiving cone overhead is more than offset by the simplified storage when using the new spring absorption cone for torsion springs both inwardly and outwardly bent torque transmission leg at its spring end. This is true in the reverse direction as well for the additional effort that is operated for the recess in the peripheral surface, if the new spring receiving cone is used together with the stop for fixing a spring end of a torsion spring with an outwardly bent torque transmission legs. Preferably, the stop anchoring hole in the projection in the spring receiving cone according to the invention has a minimum radial distance to the adjacent peripheral surface, which is as large as a maximum wire thickness of the torsion spring to be determined. A maximum radial distance of the stop anchor hole to the adjacent peripheral surface is typically twice the maximum wire thickness of the torsion spring. The maximum wire thickness of the torsion spring determines the minimum height of the stop for an outwardly bent torque transmission leg of the torsion spring over the peripheral surface and thus also the reasonable minimum height of the Anschlagverankerungslochs for anchoring the stop. At the same time the Anschlagverankerungsloch should not be too high above the peripheral surface, as this results in unfavorable leverage for the support of the torque transmission arm in the circumferential direction and requires a widely projecting in the radial direction projection and thus a greater material cost for the spring receiving cone according to the invention.

Preferably, the abutment anchoring hole in the protrusion for anchoring the stop is aligned parallel to the major axis of the spring receiving cone. This is regardless of the pitch direction of the torsion spring given optimal conditions for supporting the stop in the circumferential direction.

Furthermore, it is preferable if the abutment anchoring hole is a through hole to take advantage of the full wall thickness of the protrusion for supporting the abutment. In any case, the abutment anchoring hole can be formed already in the production of the spring receiving cone, for example, in a casting process. Alternatively, it can be drilled later.

Furthermore, it is preferred if the stop anchoring hole is provided with an internal thread. Then, a cap screw for screwing into the stop anchor hole may be provided with its head as a stopper. That is, the stopper for the outward torque-transmitting leg can be provided with the new spring-receiving cone by a simple cap screw if necessary. This is extremely cost-effective with regard to storage, especially as such a cylinder head screw is a standard component. The attachment of the stop in the form of the head of the cylinder screw is connected with minimal effort. In particular, the stop when screwing insertion of the peripheral surface of the spring receiving cone in the spring end is not in the way of the outwardly facing torque transmitting leg, but it is attached later by screwing the cylinder screw.

At least when the Anschlagverankerungsloch is provided in the projection and thus anchored therein a stop for the torque transmission leg in the circumferential direction in the same peripheral region as the protruding from the peripheral surface and engaging spring coils of the torsion flank, there is no risk that the torque transmission arm the stop in the axial Dodge direction away from the lead.

Preferably, the new spring receiving cone also has a further edge in one of the at least one flank diametrically opposite circumferential region, which also protrudes away from the peripheral surface between spring coils of the respective torsion spring or is screwed when attaching the spring receiving cone between these spring coils.

In the new spring receiving cone, the abutment anchoring hole or the projection in which the abutment anchoring hole is provided may be provided in the same circumferential area as the recess in the peripheral surface. In this case, the stop is above the recess. This has no negative impact on its function. However, the additional material of the projection can be used to reinforce the locally absorbed by the recess in the peripheral surface spring receiving cone.

In any case, the projection in the new spring receiving cone may be provided only locally, so that the protrusion with the abutment anchoring hole, for example, rises radially over the adjacent circumferential surface by more than half the maximum wire thickness of the torsion spring only over a circumferential region of less than 90 °. In other words, the projection in the new spring receiving cone is normally not intended as an axial stop for the spring end.

In order to prevent slippage or slipping of the spring coils from the peripheral surface of the spring receiving cone according to the invention, a plurality of web-shaped axial elevations project from the conical peripheral surface. The elevations may be a few millimeters high and leak towards the inner end of the peripheral surface. They make the peripheral surface non-circular and thus provide the under the torsional stress of the spring constricting spring coils hold. Preferably, four evenly distributed over the Unfangsfläche surveys are provided.

In the spring receiving cone according to the invention further holes for rotating the spring receiving cone with the spring end of the torsion spring against a extending through the torsion spring, rotatably mounted shaft and to set the spring receiving cone with the spring end of the torsion spring may be provided on the shaft. That is, the spring receiving cone can be formed directly as a clamping cone. Alternatively, further holes may be provided in the spring receiving cone for securing the spring receiving cone to the spring end of the torsion spring on a non-rotatable abutment. This corresponds to the design of the spring receiving cone according to the invention as a solid cone. Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and combinations of several features mentioned in the description are merely exemplary and can alternatively or cumulatively come to effect, without the advantages of compelling embodiments of the invention must be achieved.

The features mentioned in the patent claims and the description are to be understood in terms of their number that exactly this number or a greater number than the said number is present, without requiring an explicit use of the adverb "at least". For example, when talking about an element, it should be understood that there is exactly one element, two elements or more elements. These features may be supplemented by other features or be the only characteristics that make up the product in question.

The reference numerals contained in the claims do not limit the scope of the objects protected by the claims. They are for the sole purpose of making the claims easier to understand.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1

ist eine Seitenansicht eines erfindungsgemäßen, als Spannkonus ausgebildeten Federaufnahmekonus, in der einige verdeckte Linien gestrichelt wiedergegeben sind.

Fig. 2

ist ein Axialschnitt durch den Federaufnahmekonus gemäß Fig. 1.

Fig. 3

ist eine perspektivische Vorderansicht des Federaufnahmekonus gemäß den Fig. 1 und 2.

Fig. 4

ist eine perspektivische Rückansicht des Federaufnahmekonus gemäß den Fig. 1 und 4.

Fig. 5

ist eine perspektivische Rückansicht eines erfindungsgemäßen, als Festkonus ausgebildeten Federaufnahmekonus.

Fig. 6

ist eine perspektivische Explosionszeichnung eines weiteren erfindungsgemäßen, als Spannkonus ausgebildeten Federkonus und eines Federendes einer Torsionsfeder mit nach innen abgebogenem Drehmomentübertragungsschenkel.

Fig. 7

zeigt in einer perspektivischen Ansicht das Federende gemäß Fig. 6 festgelegt auf dem Spannkonus gemäß Fig. 6.

Fig. 8

ist eine perspektivische Explosionszeichnung des Spannkonus gemäß den Fig. 6 und 7, eines Federendes einer Torsionsfeder mit nach außen abgebogenem Drehmomentübertragungsschenkel und einer Zylinderschraube als Anschlag für diesen Drehmomentübertragungsschenkels.

Fig. 9

ist eine perspektivische Ansicht der zusammengebauten Teile gemäß Fig. 8.

In the following the invention will be further explained and described with reference to preferred embodiments shown in the figures.

Fig. 1

is a side view of a spring cone according to the invention, designed as a clamping cone, in which some hidden lines are shown in dashed lines.

Fig. 2

is an axial section through the spring receiving cone according to Fig. 1 ,

Fig. 3

is a front perspective view of the spring receiving cone according to the Fig. 1 and 2 ,

Fig. 4

is a rear perspective view of the spring receiving cone according to the Fig. 1 and 4 ,

Fig. 5

is a perspective rear view of an inventive, trained as a solid cone spring receiving cone.

Fig. 6

is an exploded perspective view of another invention, designed as a clamping cone spring cone and a spring end of a torsion spring with inwardly bent torque transmission legs.

Fig. 7

shows in a perspective view of the spring end according to Fig. 6 determined on the clamping cone according to Fig. 6 ,

Fig. 8

is an exploded perspective view of the clamping cone according to the Fig. 6 and 7 , a spring end of a torsion spring with outwardly bent torque transmission leg and a cylinder screw as a stop for this torque transmission leg.

Fig. 9

is a perspective view of the assembled parts according to Fig. 8 ,

DESCRIPTION OF THE FIGURES

The in the Fig. 1 to 4 shown spring receiving cone 1 is provided for a spring end of a helical torsion spring, which is not shown here itself. It is about the spring end in the direction of a main axis 2 of the spring receiving cone 1 rotatably set on the spring receiving cone 1, to torques between the spring and a Transfer structure on which the spring receiving cone 1 is fixed. This structure, which is not shown in the figures, may be a rotationally fixed abutment or a torsionally resilient supported by means of the torsion spring, rotatably mounted shaft.

The in the Fig. 1 to 4 illustrated spring receiving cone 1 is provided for the latter purpose and is therefore also referred to as a clamping cone 3. In this case, a coaxial to the main axis 2 cylinder bore 4 is provided for the shaft, in the wall 5 threaded holes 6 are formed for mounting screws 20. In addition, radially extending to the main axis 2 cylindrical blind holes 7 are provided for the insertion of clamping tools to rotate the spring receiving cone 1 with a spring end fixed thereto relative to the respective shaft. This serves to apply a biasing force to the shaft before setting the spring receiving cone 1.

The in Fig. 5 On the other hand, the spring receiving cone 1 shown is a fixed cone 21 and has axial threaded bores 22 for fixing screws (not shown here) in an end face 23 at its rear end.

To set the spring end of the torsion spring to the spring receiving cone 1 of the chip cone 3 according to the Fig. 1 to 4 and the solid cone 21 according to Fig. 5 the same education. Thus, a peripheral surface 8 is provided in each case, which is inserted into the spring end and this is supported on the inner circumference of the torsion spring. Due to the slightly conical shape of the peripheral surface 8, which does not have to circulate over the entire arc around the main axis 2, the spring receiving cone 1 has its name. From the peripheral surface 8 are flanks 9 and 10 from which are screwed when inserting the peripheral surface 8 in the spring end between the spring coils of the torsion spring. The flanks 9 and 10 are diametrically opposite each other across the main axis 2, and the flank 9 has an interruption. That is, the flank 9 consists of two mutually circumferentially spaced partial flanks. In addition to the flank 9, a recess 11 is provided in the circumferential surface 8, which is limited in the circumferential direction by a torque transmission edge 12. In the recess 11 of the spring wire can be bent at the spring end of the torsion spring to form a torque transmitting leg, which is supported on the torque transmitting edge. However, the spring receiving cone 1 is also suitable for use with torsion springs, which have at their spring end an outwardly bent torque transmission leg. For such a torque transmission leg, a cylinder screw 13 is screwed into an internal thread 14 after the application of the spring end on the spring receiving cone 1, which is provided above the peripheral surface 8 in a Anschlagverankerungsloch 15 in an adjacent to the peripheral surface 8 radially outwardly facing projection 16. The head 17 of the cylinder head screw 13 then forms a stop for the torque transmission arm, which is anchored to the shaft 18 of the cylinder head screw 13 via the internal thread 14 in the stop anchoring hole 15. This stop comes only in the way of outwardly bent torque transmission arm, when the spring receiving cone 1 is already screwed with the flanks 9 and 10 in the spring end. Dodging of the torque transmitting leg before the stop 19 in the form of the head 17 of the screw 13 is prevented by the adjacent edge 9. The projection 16 is only locally, ie over a limited area of the circumference about the main axis 2 on the peripheral surface 8 via. By the abutment anchoring hole 15 extending parallel to the main axis 2 through the projection 16 is located above the recess 11, the torque transmission leg of the torsion spring is always supported in the same circumferential area about the main axis 2, regardless of whether it is bent inwards or outwards. In order to avoid an axial sliding of the contracting under torsional stress spring coils of the peripheral surface 8, in addition to the circumferentially extending flanks 9 and 10 for the outermost spring coils four mutually offset by 90 ° in the circumferential direction, axially extending ridge-shaped elevations 23 of the peripheral surface 8 are provided , Opposite the recess 11, the adjacent elevations 23 are offset by 45 ° about the main axis 2. These projections 23 make the peripheral surface non-circular, so that the spring wire of the contracting spring coils despite its conical shape, which is not eliminated by the elevations 23, finds support on the peripheral surface.

The Fig. 6 and 7 show once as an exploded view and once in the assembled state another than tensioning cone 3 formed spring receiving cone 1 and a spring end 25 of a torsion spring 24. The spring end 25 is here provided with a radially inwardly bent torque transmission legs 26. This engages in the recess 11 a. In this case, the last turn 27 is held by the flanks 9 and 10 in the axial direction on the peripheral surface 8, so that the torque transmitting leg 26 actually only serves to transmit the torque from the torsion spring 24 via the torque transmitting edge on the spring receiving cone 1. The embodiment of the formed as a clamping cone 3 spring receiving cone 1 differs from that of Fig. 1 to 4 by another embodiment of the cylinder liner 4, here with grooves 28 for receiving corresponding webs of a shaft which is elastically supported by the torsion spring 24.

The Fig. 8 and 9 show the same designed as a clamping cone 3 spring receiving cone 1 as the Fig. 6 and 7 , but here in conjunction with a spring end 25 of a torsion spring 24, the torque transmission arm 26 is bent radially outward. In this case, the cylinder head screw 13 with its head 17 serves as a stop 19 for the torque transmission leg 26. The last turn 27 of the torsion spring 24 is again held by the flanks 9 and 10 in the axial direction on the peripheral surface 8, so that here too the torque transmission leg for pure torque transmission between the torsion spring 24 and the spring receiving cone 1 is used.

LIST OF REFERENCE NUMBERS

1

Spring receiving cone

2

main axis

3

Spannkonus

4

cylinder liner

5

wall

6

threaded hole

7

blind

8th

peripheral surface

9

flank

10

flank

11

recess

12

Torque transmission edge

13

cylinder head screw

14

inner thread

15

Stop anchoring hole

16

head Start

17

head

18

shaft

19

attack

20

fixing screw

21

fixed cone

22

threaded hole

23

survey

24

torsion spring

25

spring end

26

Torque transmission leg

27

spring coil

28

groove

Claims (15)

1. Spring mounting cone (1) for a spring end (25) of a spiral-shaped torsion spring (24) having a bent torque-transmitting leg,
   wherein the spring mounting cone (1) comprises:

   - a circumferential surface (8) for radially supporting the torsion spring at its internal circumference,

   - at least one flank (9, 10) protruding from the circumferential surface (8) and extended in circumferential direction for engaging between spring windings (27) of the torsion spring (24),

   - an opening (11) in the circumferential surface (8) bounded by a torque-transmitting edge (12) for accommodating and supporting a torque-transmitting leg (26) of the torsion spring bent inward, and

   - a projection (16) that points radially outward and that is axially adjacent to the circumferential surface (8),

   characterised in that the projection (16) has a stop anchoring hole (15) at a radial distance from the adjacent circumferential surface (8), which is designed to anchor a stop (19) in circumferential direction for a torque-transmitting leg (26) of the torsion spring (24) bent outward.
2. Spring mounting cone (1) of claim 1, characterised in that the stop anchoring hole (15), with regard to the adjacent circumferential surface (8), is arranged at a radial minimum distance of the maximum wire size and at a radial maximum distance of twice the maximum wire size of the torsion spring (24).
3. Spring mounting cone (1) of claim 1 or 2, characterised in that the stop anchoring hole (15) is oriented parallel to a main axis (2) of the spring mounting cone (1).
4. Spring mounting cone (1) of any of the claims 1 to 3, characterised in that the stop anchoring hole (15) is a through hole.
5. Spring mounting cone (1) of any of the claims 1 to 4, characterised in that the stop anchoring hole (15) is provided with an internal thread (14), wherein a cylinder screw (13) is provided for being screwed in the stop anchoring hole (15), its head (17) serving as the stop (19).
6. Spring mounting cone (1) of any of the claims 1 to 5, characterised in that the stop anchoring hole (15) is provided in a same circumferential area as the at least one flank (9).
7. Spring mounting cone (1) of any of the claims 1 to 6, characterised in that a further flank (10) protrudes from the circumferential surface (8) in a circumferential area diametrally opposing the at least one flank (9).
8. Spring mounting cone (1) of any of the claims 1 to 7, characterised in that the stop anchoring hole (15) is provided in a same circumferential area as the opening (11).
9. Spring mounting cone (1) of any of the claims 1 to 8, characterised in that the projection (16) with the stop anchoring hole (15) only rises above the adjacent circumferential surface (8) by more than half the maximum wire size of the torsion spring over a circumferential area of less than 90°.
10. Spring mounting cone (1) of any of the claims 1 to 9, characterised in that a plurality of web-shaped axial protrusions protrude from the conical circumferential surface (8).
11. Spring mounting cone (1) of any of the claims 1 to 10, characterised in that four protrusions (23) arranged at an offset of 90° in circumferential direction protrude from the conical circumferential surface (8).
12. Spring mounting cone (1) of any of the claims 1 to 11, characterised in that further holes (6, 7, 22) are provided in the spring mounting cone (1) for rotating the spring mounting cone (1) with the spring end of the torsion spring with regard to a rotary mounted shaft extending through the torsions spring, and for fixing the spring mounting cone (1) with the spring end of the torsion spring (24) to the shaft or for fixing the spring mounting cone (1) with the spring end of the torsion spring to a rotationally fixed support.
13. Use of a spring mounting cone (1) of any of the claims 1 to 12, characterised in that the circumferential surface (8) of the spring mounting cone (1) is inserted in a spring end (25) of a torsion spring (24) having a torque-transmitting leg (26) bent outward in a screwing movement, and that, afterwards, a stop (19) for the torque-transmitting leg (26) is anchored in the stop anchoring hole (15).
14. Arrangement comprising a spring mounting cone (1) of any of the claims 1 to 12 and a torsion spring (24) having a torque-transmitting leg (26) bent outward at one spring end (25), wherein the circumferential surface (8) of the spring mounting cone (1) is inserted in the spring end (25) of the torsion spring (24), characterised in that a stop (19) for the torque-transmitting leg (26) is anchored in the stop anchoring hole (15) of the spring mounting cone (1).
15. Arrangement of claim 14, characterised in that the flanks (9 and 10), in axial direction, hold an endmost winding (27) of the torsion spring (24) on the circumferential surface (8).

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