WO2013050614A1

WO2013050614A1 - Spring mounting cone for a torsion spring having a torque-transmitting leg bent inward or outward

Info

Publication number: WO2013050614A1
Application number: PCT/EP2012/069896
Authority: WO
Inventors: Jochen Birwe
Original assignee: Brand Kg
Priority date: 2011-10-06
Filing date: 2012-10-08
Publication date: 2013-04-11
Also published as: EP2764189A1; PL2764189T3; DK2764189T3; EP2764189B1; DE202011051560U1

Abstract

The invention relates to a spring mounting cone (1) for a spring end (25) of a spiral torsion spring (24), having a bent torque-transmitting leg (26) and comprising a circumferential surface (8) for radially supporting the torsion spring at the internal circumference of the torsion spring, at least one flank (9, 10) protruding from the circumferential surface (8) and extended in the 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 (24) bent inward, and a projection (16) that points radially outward and that is axially adjacent to the circumferential surface (8). The projection (16) has a hole (15) at a radial distance from the adjacent circumferential surface (8), which hole is designed to anchor a stop (19) in the circumferential direction for a torque-transmitting leg (26) of the torsion spring (24) bent outward.

Description

SPRING COLLAR FOR A TORSION SPRING WITH A TORQUE TRANSMISSION THREADED INTO THE INSIDE OR OUTSIDE

TECHNICAL FIELD OF THE INVENTION

The invention relates to a spring receiving cone having the features of the preamble of independent claim 1.

In particular, such a spring-receiving mechanism is provided for side-by-side engagement of a sectional spring for balancing the weight of an industrial or garage sectional door. 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 having the features of the preamble of independent claim 1 is known from US 2001/0039761 A1. 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 with the spring axis and the spring cone is pressed with its peripheral surface in the spring end until the torsion spring abuts against a circumferential surface, radially outwardly facing and circumferential to the entire peripheral surface projection. In this case, two flanges, which are offset in the circumferential direction in relation to the outside, enter between the spring walls 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 a known solid cone with the features of the preamble of independent claim 1 are axially adjacent to a peripheral surface two diametrically opposite ü overlying, Rad ial outward Shen pointing checks provided in which mounting holes are provided for attaching the hard cone to 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.

In one known from DE 43 41 309 C1 spring receiving cone are adjacent to the peripheral surface, which is to be introduced into the spring end of a Torsionsfeder to be determined, two diametrically opposed, radially extending mounting holes with I nnengewinde 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 formed already in the production 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 have two retaining elements with each mounted a fastening 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 known from EP 1 331 41 5 B 1. 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 element with the abutment surface is a region 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, it proves to be costly, at least in the case of larger wire sizes and correspondingly higher stiffnesses of the torsion spring, to introduce the torque transmission leg in the recess in the fuse element, because the torque transmission legs diametrically opposed to a single axial screwing of the fuse element, vo or other 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 DE 20 2009 001 535 U1 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-transmitting leg is fixed by means of force and positive locking on or on the spring receiver. This just-performed 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 is parallel to the spring axis of the torsion spring in radial distance to a receiving socket of the spring receiving extends, 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 WO 90/15216 a multi-part spring receptacle for a torsion spring is known, 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 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 coils.

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. Preferred embodiments of the novel spring receiving cone are defined in the dependent claims.

DESCRIPTION OF THE INVENTION

In the new spring receiving cone, a hole is provided in the radially outwardly facing projection radially outward of the peripheral surface, at a radial distance from the adjoining peripheral surface, which is designed to anchor a stopper for an axially outwardly bent torque transmission leg of the torsion spring. This hole is always provided, even if a spring end of a torsion spring with an inwardly bent torque on the new spring receiving cone Transmission leg is set. 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 circumferential 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.

The hole in the projection has in the spring receiving cone according to the invention 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 hole from 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 hole for anchoring the stop. At the same time, the hole should not be too high above the peripheral surface, as this results in unfavorable leverage for the support of the torque transmission leg in the circumferential direction and a far projecting in the radial direction projection and thus requires a greater material cost for the spring receiving cone according to the invention.

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

Furthermore, it is preferred if the hole is a through hole to take advantage of the full wall thickness of the projection for supporting the stop. In any case, the hole can already be formed 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 hole is provided with an internal thread. Then a cylinder head screw can be provided for screwing into the hole with its head as a stop. 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 hole in the projection and thus anchored therein stop for the torque transmitting leg in the circumferential direction in the same peripheral region as the protruding from the peripheral surface and engaging between spring coils of the torsion edge is provided, there is no danger that the torque transmission arm the attack 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 hole in which the hole is provided may be provided in the same peripheral 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 can be provided only locally, so that the projection with the hole, for example, only over a peripheral region of less than 90 ° by more than half the maximum wire thickness of the torsion radially over the adjacent peripheral surface rises. 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 your slipping or sliding of the spring coils from the circumferential 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 out of round 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 may be effective as an alternative or cumulatively without the advantages necessarily being achieved by embodiments according to the invention. Without thereby altering the subject matter of the appended claims, as regards the disclosure of the original application documents and the patent, further features can be found in the drawings, in particular the illustrated geometries and the relative dimensions of several components and their relative arrangement and operative connection. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be used Characteristics of different claims are combined. Likewise, in the claims listed features for further embodiments of the invention can be omitted.

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 signs contained in the patent 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

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 an inventive, designed as a clamping cone

Spring recording 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.

FIG. 3 is a front perspective view of the spring receiving cone shown in FIGS.

1 and 2.

FIG. 4 is a rear perspective view of the spring receiving cone according to FIGS

1 and 4. Fig. 5 is a rear perspective view of a spring receiving cone of the invention constructed as a solid cone. is an exploded perspective view of another designed as a clamping cone spring cone and a spring end of a torsion spring with inwardly bent torque transmission legs. is an exploded perspective view of the clamping cone of FIGS. 6 and 7, a spring end of a torsion spring with outwardly bent torque transmission legs and a cylinder screw as a stop for this torque transfer leg. is a perspective view of the assembled parts of FIG. 8.

DESCRIPTION OF THE FIGURES

The spring receiving cone 1 shown in Figs. 1 to 4 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 major axis 2 of the spring receiving cone 1 rotatably set on the spring receiving cone 1 to transmit torques between the spring and a 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 spring receiving cone 1 shown in FIGS. 1 to 4 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 spring receiving cone 1 shown in Fig. 5, however, is a solid cone 21 and has axial threaded holes 22 for (not shown here) mounting screws in an end face 23 at its rear end.

For fixing the spring end of the torsion spring to the spring receiving cone 1, the chip cone 3 according to FIGS. 1 to 4 and the solid cone 21 according to FIG. 5 are identical. 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 U mängsfläche 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 edge 9 is also two mutually circumferentially spaced partial flanks. In addition to the flank 9, a recess 11 is provided in the peripheral surface 8, which is limited in the circumferential direction by a torque-transmitting edge 12. In the recess 1 1, 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 transmission 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 hole 15 in an adjacent to the peripheral surface 8 radially outwardly facing projection 16. The head 17 of the cylinder screw 13 then forms a stop for the torque transmission leg, which is anchored to the shaft 18 of the cylinder screw 13 via the internal thread 14 in the 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 parallel to the main axis 2 through the projection 16 extending hole 15th is located above the recess 1 1, the torque transmission arm of the torsion spring is always supported in the same circumferential area around the main axis 2, regardless of whether it is bent inward or outward. 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 1 0 for the outermost spring coils four offset by 90 ° in the circumferential direction mutually offset, axially extending ridge-shaped elevations 23 of the peripheral surface. 8 intended. Opposite the recess 1 1, 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.

6 and 7 show once as an exploded view and once in the assembled state a further formed as a clamping cone 3 spring receiving cone 1 and a spring end 25 of a torsion spring 24. The spring end 25 is bent here with a radially inwardly bent rotational momentum leg kels 26 Mistake . This g matures in the recess 11. 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 FIGS. 1 to 4 by another embodiment of the cylinder liner 4, here with grooves 28 for receiving respective webs of a shaft which is elastically supported by the torsion spring 24.

8 and 9 show the same formed as a clamping cone 3 spring receiving cone 1 as shown in FIGS. 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. REFERENCE LIST Federaufnahmekonus

main axis

Spannkonus

cylinder liner

wall

threaded hole

blind

peripheral surface

flank

recess

Torque transmission edge

cylinder head screw

inner thread

hole

head Start

head

shaft

attack

fixing screw

fixed cone

threaded hole

survey

torsion spring

spring end

Torque transmission leg

spring coil

groove

Claims

PATENT CLAIMS 1. Spring receiving cone (1) for a spring end (25) of a helical torsion spring (24) with a bent torque transmission arm (26),

wherein the spring receiving cone (1):

- A peripheral surface (8) for radial support of the torsion spring (24) on the inner circumference,

- At least one of the peripheral surface (8) projecting, circumferentially elongated edge (9, 10) for engagement between spring coils (27) of the torsion spring (24),

- A circumferentially by a torque transmitting edge (12) limited recess (1 1) in the peripheral surface (8) for receiving and supporting an inwardly bent torque transmission arm (26) of the torsion spring (24) and

- an axially on the peripheral surface (8) adjacent radially outwardly facing projection (16)

having,

characterized in that the projection (16) at a radial distance to the adjacent peripheral surface (8) has a hole (15) for anchoring a stop (19) in the circumferential direction for an outwardly bent torque transmission leg (26) of the torsion spring (24). is trained.

Second spring receiving cone (1) according to claim 1, characterized in that the hole (15) arranged at a minimum radial distance from the maximum wire thickness and a maximum radial distance of twice the maximum wire thickness of the torsion spring (24) to the adjacent peripheral surface (8) is.

3. spring receiving cone (1) according to claim 1 or 2, characterized in that the hole (15) is aligned parallel to a main axis (2) of the spring receiving cone (1).

4. spring receiving cone (1) according to one of claims 1 to 3, characterized in that the hole (15) is a through hole.

5. spring receiving cone (1) according to one of claims 1 to 4, characterized in that the hole (15) is provided with an internal thread (14), wherein a cylinder screw (13) for screwing into the hole (15) with her head ( 17) is provided as a stop (19).

6. spring receiving cone (1) according to one of claims 1 to 5, characterized in that the hole (15) in the same circumferential region as the at least one flank (9) is provided.

7. spring receiving cone (1) according to one of claims 1 to 6, characterized in that a further flank (10) in one of the m i ndesten ei NEN flan ke (9) diametrically opposite peripheral portion of the peripheral surface (8) protrudes.

8. spring receiving cone (1) according to one of claims 1 to 7, characterized in that the hole (15) in the same circumferential region as the recess (1 1) is provided.

9. spring receiving cone (1) according to one of claims 1 to 8, characterized in that the projection (16) with the hole (15) radially over only a peripheral region of less than 90 ° by more than half the maximum wire thickness of the torsion spring rises above the adjacent peripheral surface (8).

10. spring receiving cone (1) according to one of claims 1 to 9, characterized in that a Meh rzah l of web-shaped axial elevations (23) protrudes from the conical peripheral surface (8).

1 1. Spring receiving cone (1) according to any one of claims 1 to 10, characterized in that four protrude by 90 ° in the circumferential direction offset from each other protrusions of the conical peripheral surface (8).

12. spring receiving cone (1) according to one of claims 1 to 1 1, characterized in that further holes (6, 7, 22) in the spring receiving cone (1) for rotating the spring receiving cone (1) with the spring end of the torsion spring against a extending shaft mounted by the torsion spring, and for fixing the spring receiving cone (1) to the spring end of the torsion spring (24) on the shaft or to the shaft Setting the spring receiving cone (1) are provided with the spring end of the torsion spring on a non-rotatable abutment.