WO2007134951A1 - Dispositif de tension pour un moyen de traction, en particulier une courroie ou une chaîne - Google Patents

Dispositif de tension pour un moyen de traction, en particulier une courroie ou une chaîne Download PDF

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Publication number
WO2007134951A1
WO2007134951A1 PCT/EP2007/054179 EP2007054179W WO2007134951A1 WO 2007134951 A1 WO2007134951 A1 WO 2007134951A1 EP 2007054179 W EP2007054179 W EP 2007054179W WO 2007134951 A1 WO2007134951 A1 WO 2007134951A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction element
abutment
base plate
spring
lever
Prior art date
Application number
PCT/EP2007/054179
Other languages
German (de)
English (en)
Inventor
Thomas Mennerat
Michael Bogner
Original Assignee
Schaeffler Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2007134951A1 publication Critical patent/WO2007134951A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
    • F16H7/1218—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means of the dry friction type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
    • F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/081—Torsion springs

Definitions

  • Clamping device for a traction means in particular a belt or a chain
  • the invention relates to a tensioning device for a traction means, in particular a belt or a chain, comprising a base plate, a relative to this against the restoring force of a coil spring rotatably mounted and a traction device leading clamping element, in particular a tension roller bearing tensioning lever, and a damping element serving friction , which is pressed by the coil spring against the relative to the friction element moving clamping lever.
  • a tensioning device of the type described serves to tension a traction means, for example a belt or a chain of an internal combustion engine, continuously so as to compensate for differences in length caused by stress or aging.
  • the clamping device is attached via a base plate, for example, to an engine block, wherein the base plate is stationary and secured against rotation.
  • a tensioning lever, on which a tensioning roller or a tensioning shoe is arranged, over which the traction means runs, is rotatably coupled to the base plate via a helical spring about a central axis.
  • the helical spring is prestressed, so that a tensioning force is exerted on the traction means via the tensioning lever, wherein the tensioning lever can also be moved against the helical spring via the traction means, for example when changing the run.
  • a friction element for example in the form of a friction shoe, which serves to damp the movement of the tensioning lever relative to the base plate.
  • the friction element is coupled to the coil spring, due to the given from home bias and the case of a Lever movement optionally increased spring tension presses the friction element against the clamping lever, causing it to be damped in its rotational movement relative to the base plate.
  • a tensioning device is known, for example, from EP 0 780 597 B1.
  • the described there, consisting of several parts friction element is pivotally mounted at one end to the base plate, in the region of the other end engages the coil spring and pushes the friction radially around the pivot bearing outward against the housing of the clamping lever.
  • a bearing journal is provided on the base plate, on which a Tarsteck penbrerium having a bearing or holding portion of the multi-part friction element is attached.
  • This design is relatively complex designed after a special bearing journal, which allows a corresponding pivot bearing to be attached to the base plate either separately or form there exactly, on the other hand, the friction element itself is elaborately designed after there the special holding or bearing section with the bearing eye must be formed.
  • the invention is thus based on the problem to provide a clamping device which is simple in terms of the base plate-side mounting of the friction element.
  • the friction element is not rotatably mounted on a journal over a bearing eye pivotally, but comes in the clamping device according to the invention a simple abutment, so a suitable stop on the Base plate for use, on which the friction element either with its free end or an integrally formed on it corresponding abutment portion in the form of a projection and is pivotally supported on this bare plant, including the adjacent surface of the friction element, be it its free end face or the surface of the Projection, according rounded or curved executed.
  • the friction element is pivotable about an imaginary pivot point, that is to say a momentary pole, on the abutment surface during the rolling movement.
  • the embodiment with regard to the pivotable support of the friction element which is loaded at the other end of the spring and urged against the base plate-side abutment, be designed such that it is in a spring movement for damping against a relative to the lever axis radially further inward lever portion or is movable against a lying on the lever axis radially further outward lever portion.
  • the spring can, when it is stretched, open, so expand the radius, in which case the friction element is then pushed radially outward against a corresponding abutment portion of the Spannhe- lever, here usually in the form of an outer housing.
  • the coil spring can also close at further tension, so zoom in from the radius, in which case the friction element is primarily urged radially inwardly against a corresponding abutment portion of the pivot lever, here the bearing hollow pin.
  • the friction element may have a projection which engages behind an abutment projection forming the base plate-side abutment, wherein the helical spring on the other attached to the end of the friction element.
  • the friction element which is designed to be elongated and bent, thus at a location near its one end has a corresponding projection, with which the friction element bears against a corresponding abutment on the base plate, also here as a simple projection or as a simple edge.
  • the coil spring is arranged at the opposite end of the coil spring.
  • the friction element is pressed or pulled by the coil spring either against the base plate side abutment.
  • the helical spring is expediently suspended in a receptacle provided on the friction element for the spring end, which can be angled radially inwards or outwards.
  • the coil spring pulls the friction element with its abutment projection against the base plate-side abutment, pivots it inwards about this abutment or support point and presses it against the abutment section of the tension lever.
  • the coil spring opens under further load, so expanded radially, presses the free end of the coil spring against the friction element, this presses with its abutment projection against the corresponding projection on the base plate and pivots it radially outward against the clamping lever.
  • An alternative embodiment of the invention in contrast, provides that the abutment is formed by a base plate-side abutment projection, against which the friction element is supported with its one end or an abutment projection, wherein the angled spring element engages behind the free other end of the friction element frictionally.
  • the spring end of the coil spring is not mounted in a corresponding provided on the friction element recording, but rather engages behind the spring end the free end of the friction element only non-positively.
  • a further embodiment of the invention provides to form the abutment of a base plate-side abutment projection, against which the friction element is supported with its one end or an abutment projection, wherein the spring element is superimposed with its end face at the other end of the friction element, the spring end either directly on End of the friction element or the local front side rests or in a recording provided there.
  • This embodiment of the invention is suitable for an opening helical spring, which abuts with its end-side end edge directly against a corresponding abutment surface at the end of the friction element and presses this with its other free, slightly rounded end against the abutment projection.
  • FIG. 1 is a schematic diagram of a clamping device for explaining the basic construction principle thereof
  • Fig. 2 is a schematic representation of the support of the friction element and the
  • Fig. 3 is an enlarged view showing the support of the coil spring
  • FIG. 4 is a representation corresponding to FIG. 2, but with different coil spring guide
  • Fig. 5 shows another embodiment of the invention a support of a friction element and coupling with the coil spring
  • FIG. 6 shows a fourth embodiment according to the invention of a friction element support and coupling with the helical spring.
  • Fig. 1 shows in the form of a schematic diagram of a clamping device 1 according to the invention comprising a base plate 2, which is not shown here in more detail via a fastening screw, and the z. B. on the base plate 2 provided sleeve 3 passes through, for example, is bolted to an engine block. About a pin 4, which engages in a motor block-side recess, the base plate 2 is secured against rotation. Further, a clamping lever 5 is provided, comprising a bearing portion 6 for a tension roller not shown in detail, and a housing-like lever portion 7. Further provided is a sliding bearing 8, which causes the mounting of the clamping lever 5 on the sleeve 3.
  • the helical spring 9 is tensioned further, with the helical spring 9 opening in this embodiment, that is to say radially increased slightly in diameter.
  • the friction element is pressed against the friction surface 20 of the housing-like lever portion 7, about which its relative movement to the base part 2 is attenuated.
  • the pressing force is reinforced by the increasing spring tension at a corresponding Hebelverschwenkung.
  • Fig. 2 shows a plan view of the base plate 2, on which the friction element 10, which is shown here as a curved friction shoe, is pivotally supported.
  • a projection 16 is provided on the base plate 2, which, as shown in phantom in Fig. 2, because concealed by the friction element 10, has a slightly curved shape.
  • This projection 16 forms the abutment for the friction element 10, which has a corresponding abutment in the form of a projection 17, see Fig. 3, wherein the end edge of this projection 17 also, see the dashed line in Fig. 2, slightly rounded.
  • this results in a pivotable support that is, the friction element 10 can be easily pivoted on the abutment support as a result of the rounded abutting surfaces.
  • a receptacle 18 is provided, which can be configured as desired, and in which the angled end 19 of the coil spring 9 is mounted.
  • the coil spring 9 winds out of the plane of the drawing out to the clamping lever 5, which is not shown here in detail is, and is connected to this. If the coil spring 9 is further tensioned as a result of the lever movement, then it closes slightly, that is, it exerts a tensile force F in the direction of the arrow shown on the friction element 10. This is pressed with its friction surface 20 against the sleeve 3, which is part of the clamping lever 5 here.
  • FIG. 4 A similar embodiment is shown in FIG. 4, the support of the friction element 10 is realized here in the same manner as in the embodiment of Figures 2 and 3, only the leadership of the coil spring and its coupling with the friction element 10 is slightly different. While in Fig. 2, the coil spring coming from the outside with its free end 19 angled inward and hooked from the outside into the receptacle 18, the coil spring 9 in Fig. 4 is quasi coming from the inside, ie adjacent to the sleeve 3 lying to the friction element 10th guided and the free spring end 19 angled outwardly and hooked into the receptacle 18.
  • FIG. 5 A further embodiment is shown in FIG. 5.
  • the friction element 10 with its free end or its local front edge 21, which is rounded here is directly supported by a corresponding abutment projection 22 of the base plate 2.
  • the abutment projection 22 has a slightly rounded shape, as clearly shown in Fig. 5.
  • the friction surface 20 of the abutment 10 acts here for the sleeve-like housing 7 of the clamping lever, thus, to the outside.
  • the coil spring 9 runs adjacent to the friction element 10 and is located on the side thereof and engages with its free end 19, the end 23 of the friction element 10, which here slightly curved decreases in diameter. This results in a frictional connection between the spring end 19 and the friction element 10.
  • the inherent spring preload or the additional spring tension generated as a result of the lever movement generates a force F on the friction element 10, which on the one hand firmly against the abutment projection 22nd presses, on the other hand but also the friction surface 20 presses against the sleeve-like housing 7 for damping the lever movement.
  • FIG. 6 also shows an embodiment which makes it possible to increase the damping when the helical spring opens due to the movement of the lever.
  • an abutment projection 22 with slightly rounded abutment surface is provided on which the end face 21 of the free end of the friction element 10 which is in FIG this area is also rounded, is directly swivel due to the rounded superimposed.
  • a receptacle 24 is provided, in which the free end 19 of the coil spring 9 is received. This presses with its end edge 25 directly to a corresponding abutment surface of the receptacle 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

Le dispositif de tension pour un moyen de traction, en particulier une courroie ou une chaîne, comprend une plaque de base, un élément de tension monté de façon à pouvoir tourner par rapport au dispositif, contre la force de rappel d'un ressort hélicoïdal, et guidant le moyen de traction, en particulier un levier de tension portant un rouleau de tension, ainsi qu'un élément de friction servant à l'amortissement, qui est pressé par le ressort hélicoïdal contre le levier de tension déplacé par rapport à l'élément de friction. Selon ce dispositif, l'élément de friction (10) est appuyé de manière orientable contre une butée (14, 16, 22) conçue directement sur la plaque de base (2) et il est pressé par le ressort hélicoïdal (9) contre la butée (14, 16, 22) et le levier de tension.
PCT/EP2007/054179 2006-05-19 2007-04-27 Dispositif de tension pour un moyen de traction, en particulier une courroie ou une chaîne WO2007134951A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610023565 DE102006023565A1 (de) 2006-05-19 2006-05-19 Spanneinrichtung für ein Zugmittel, insbesondere einen Riemen oder eine Kette
DE102006023565.7 2006-05-19

Publications (1)

Publication Number Publication Date
WO2007134951A1 true WO2007134951A1 (fr) 2007-11-29

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ID=38458455

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Application Number Title Priority Date Filing Date
PCT/EP2007/054179 WO2007134951A1 (fr) 2006-05-19 2007-04-27 Dispositif de tension pour un moyen de traction, en particulier une courroie ou une chaîne

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DE (1) DE102006023565A1 (fr)
WO (1) WO2007134951A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2580877R1 (es) * 2015-02-26 2016-09-08 Vazgen PATATANIAN BAGUMIAN Casquillo de resorte giratorio

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007015676A1 (de) 2007-03-31 2008-10-02 Schaeffler Kg Spannvorrichtung eines Zugmitteltriebs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632697A (en) * 1995-12-18 1997-05-27 The Gates Corporation Damping mechanism for a tensioner
WO2001046603A1 (fr) * 1999-12-21 2001-06-28 The Gates Corporation Tendeur a mecanisme amortisseur
JP2003254399A (ja) * 2002-02-28 2003-09-10 Mitsuboshi Belting Ltd オートテンショナ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4557707A (en) * 1984-04-09 1985-12-10 Dyneer Corporation Belt tensioner
DE4220879A1 (de) * 1992-06-25 1994-01-05 Litens Automotive Gmbh Riemenspannvorrichtung
US5647813A (en) * 1995-12-18 1997-07-15 The Gates Corporation Tensioner with damping mechanism and belt drive system
DE102004047422A1 (de) * 2004-09-28 2006-04-13 Muhr Und Bender Kg Riemenspannvorrichtung mit hoher Dämpfung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5632697A (en) * 1995-12-18 1997-05-27 The Gates Corporation Damping mechanism for a tensioner
WO2001046603A1 (fr) * 1999-12-21 2001-06-28 The Gates Corporation Tendeur a mecanisme amortisseur
JP2003254399A (ja) * 2002-02-28 2003-09-10 Mitsuboshi Belting Ltd オートテンショナ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2580877R1 (es) * 2015-02-26 2016-09-08 Vazgen PATATANIAN BAGUMIAN Casquillo de resorte giratorio

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DE102006023565A1 (de) 2007-11-22

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