WO2005035956A1 - Device for pivotally mounting a drive element - Google Patents

Device for pivotally mounting a drive element Download PDF

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Publication number
WO2005035956A1
WO2005035956A1 PCT/EP2004/009429 EP2004009429W WO2005035956A1 WO 2005035956 A1 WO2005035956 A1 WO 2005035956A1 EP 2004009429 W EP2004009429 W EP 2004009429W WO 2005035956 A1 WO2005035956 A1 WO 2005035956A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
bearing
housing
drive member
drive
bore
Prior art date
Application number
PCT/EP2004/009429
Other languages
German (de)
French (fr)
Inventor
Ralph Painta
Michael Bogner
Original Assignee
Ina-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

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H7/10Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/14Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of a driving or driven pulley
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0802Actuators for final output members
    • F16H2007/0808Extension coil springs

Abstract

The invention relates to a pivot bearing (8) for a drive element (6) of a traction mechanism drive (1). A starter generator, which is pivotally fixed to an internal combustion engine (7) via the pivot bearing (8) and which is also supported by a spring means (9), is provided as a drive element (6).

Description

Title of invention

Apparatus for the pivotable mounting of a drive element

Field of the Invention

The present invention relates to the device for the pivotable mounting of a, a traction drive of an internal combustion engine associated with the drive member. This device comprises a rotary bearing between a spatially fixed member and the drive member. A traction mechanism of the traction mechanism connects pulleys or pulleys of a driven element, that is connected to the crankshaft of the engine pulley, with a pulley of a drive element. The pivotable in the operational state drive member simultaneously assumes the function of a tensioning device for the traction drive. For this, the pivotally mounted drive element is acted upon by a spring means, to achieve an increased bias of the traction device in the operating state.

Background of the Invention

Current internal combustion engines are provided with various individual units, such as water pump, air conditioning compressor, power steering pump or generator, which are preferably driven by means of a traction mechanism drive. By connecting the traction means, especially a belt, the individual belt pulleys of the driven units, the drive members, is connected to the pulley of the driven element, rotationally connected to the crankshaft of the internal combustion engine. The slip drive all the driven units requires a tensioning device, which ensures a sufficient prestressing of the traction device in conjunction with a spring means.

From DE 43 00 178 C1 a Spannvorrichtυng is known, the tension roller is supported with force in the installed state of the traction means. This clamping device further comprises a stationarily arranged base part, whose axis of symmetry simultaneously forms a pivot axis for the pivot arm, on the outside, the tension roller is rotatably mounted on said. In order to achieve a non-positive support of the tensioning roller on the traction mechanism is disposed the base member and the pivot arm, a torsion spring see be-.

The DE 100 57 818 A1 shows a traction mechanism drive designed as double disc drive of an internal combustion engine. The drive of the traction mechanism drive takes place via a rotationally rigidly connected to a crankshaft of the internal combustion engine driven member, which connects via a traction means, a belt, the other pulley of the drive member. A sufficient prestressing of the traction device, to achieve a slip-free drive is achieved with the pivotable driving element which is additionally subjected to a force by a spring means.

Summary of the Invention

The invention is based on the problem to realize a low-friction bearing of a pivotally arranged drive element of a traction drive.

This object is solved by the features of claim. 1 According to the invention the device for the pivotal mounting of the formed as a starter generator drive member comprises a positioned between the Antriebsor- gan and the engine rotational bearing. The construction of this rotary bearing includes two axially spaced, integrally with the starter-generator or the drive member related holders, which are to be designated as fastening tabs. Between a receiving educational Denden holders is inserted a stationary arranged on the engine housing in the installed condition, which includes a bore. A longitudinal axis of the housing bore corresponds with bores in the spaced axially mounted holders of the starter generator. The size of the bore in the housing is designed so that it can receive a hollow bolt. Wherein in the installed position a screw is inserted in the central longitudinal bore of the hollow bolt which is also passed through the bores of the axially spaced holder. Log-adjusting between the hollow bolt and the bore of the housing an annular gap is intended for receiving a sliding bearing.

The pivot bearing according to the invention, which forms an axis of rotation of the starter generator allows, in particular for large series simplified assembly, in which is mountable on the housing by means of a central screw connection of the pivot bearing of the starter generator. According to the invention the hollow pin and the sliding bearing in the bore of the housing are positioned to form a verliergesichertes, largely vorkomplettiertes rotary bearing is realized, which reduces the required assembly effort.

The invention enables the manufacturer of starter generators in coordination with the vehicle or engine manufacturer a standardized arrangement of the holder to the starter-generator in combination with the stationary housing arranged to implement. With the single receiving profile of these components an advantageously enlarged component matching can be achieved. Thus, it lends itself to provide different starter generators each having a same fastening or with a coincident designed rotary bearing, regardless of the size, performance, or other constraints.

Further advantageous embodiments are subject of the dependent claims 2 to 12. A preferred embodiment of the invention provides that the hollow pin at both ends in each case one is assigned as the washer to be designated shroud. The shroud has währleisten to overall to the holders of the starter generator, the task of a larger support surface of the hollow bolt. This measure significantly reduces the surface pressure in the contact area between the hollow pin and the holders.

For centering of the cover discs, the hollow bolt advantageously at both ends forming a step formed as a recording. A verliergesicherte arrangement of the cover plates on the hollow bolt can be achieved by means of a defined dimensional coordination between the inner diameter of the cover discs and the outer diameter of the hollow pin in the region of the receptacle. For this example, is a transition fit or a press fit, so that the cover disks is captively with the hollow pins and also of the hollow pin relative to the housing. To achieve this position control, which prevents an axial outlet of the hollow pin from the bore of the housing effective, the outer diameter of the cover discs exceeds an outer diameter of the hollow bolt.

The design of the cover plates in combination with the hollow pin further provides that the wall thickness of the cover discs exceeds an axial depth of the receptacle. This raises an axial projection and an axial Ü supernatant liquid of the cover discs against the end faces of the hollow pin a, whereby a direct support of the hollow pin is suppressed on the holders of the starter generator.

A further advantageous design of the device according to the invention refers to the guide of the housing over the hollow pin and the associated shields. In order to avoid a direct support of the housing on the cover plates, thrust washers are provided, which are inserted in a rotationally rigid in a front-side open installation space of the housing, and which protrude axially with respect to the end face of the housing. The thrust washer assumes the role of a thrust bearing, whereby upon pivoting the thrust washer movement of the drive element or of the starter generator a contact region, forming contact surfaces with the corresponding cover plates. Preferably, there is set a fitting clearance between the respective stop disc and the cover disc. The thrust washer is preferably made of a wear-resistant and friction-reducing material. Alternatively, is a thrust washer made of steel, wherein at least the surface facing the cover disc surface of the thrust washer is a friction-reducing, for example, has a Teflon coating.

In order to achieve a defined mounting position of the thrust washer is preferably an end, positive reception of the thrust washer in a recess open at the end of the housing offers. The axial depth of the recess is less than the wall thickness of case of i to see BE egg, thereby setting in the installed position, an axial projection of the thrust washer to the Stirnsei- te of the housing. This arrangement of the stop disc at the same time ensures an advantageous substantially completely outside cover of the thrust washer.

The invention constructed in accordance with rotational bearing can be provided means that an efficient seal further, to prevent the ingress of contaminants such as dust or moisture into the slide bearing. Advantageously, a resilient seal, such as a round rubber ring which is inserted positively into an inner annular groove of the thrust washer, is sealingly supported on the inside on a lateral surface of the hollow bolt is suitable to do so.

As a sliding bearing for the inventive device, it is advisable to use two axially spaced bearing bushes arranged in the limited radially outwardly from the housing and radially inwardly of the hollow bolt annular gap. The installation position of the plain bearing bushes is defined by radially inwardly directed lugs of the housing. Preferably, this is a radially pre-stressed, inserted in an annular groove of the housing locking ring. Alternatively, the invention includes a sliding bearing having a film thickness. Such cost-friction bearing optimize also the required radial space of the sliding bearing. Another alternative space-optimized sleeve bearing provides for at least a contact surface of the pivot bearing, that is to provide the lateral surface of the hollow bolt and / or the inner bore of the housing with a permanently fixed, a friction lining-forming coating. For this example, is a Teflon coating.

As a fitting for the pivot bearing, with which the holder of the drive member or of the starter-generator be attached to the housing, a machine screw is provided according to the invention. The screw backlash inserted into a hole of the first holder is screwed in the other holder. For this purpose, the second holder is provided with an internal thread, thus eliminating the need for a separate nut. For fixing of or to secure the screw connection in the end position a locking fluid offers to the applied to the threads after a power hardening process ensures an effective securing of the screw.

Brief Description of Drawings

An imaged in several drawings embodiment will be described below. Show it:

Figure 1 is a schematic representation of a erfindungsge- MAESSEN traction mechanism;

Figure 2 is a pivotally mounted drive element, which makes the function of a tensioning device for the traction mechanism at the same time;

3 shows an enlarged view of the pivot bearing of the pivotally mounted drive element. Detailed Description of the Drawings

In Figure 1, a built-up as a two-wheel drive traction mechanism 1 is abgebil- det. A pulling means 2, in particular a belt, thereby connecting a first pulley 3 a driven member 4 with the second pulley 5 of the drive member 6. The driven member 4 stands directly to a crankshaft of an internal combustion engine 7 in conjunction. As a drive member 6 is a belt-driven starter generator is provided which is arranged pivotally reasonable, at the same time carries out the function of a tensioning device for the traction drive. 1 For this purpose, the drive member 6 is arranged via a rotary bearing 8 pivot with respect to the internal combustion engine. 7 Due to the location of the pivot bearing 8, the own weight of the drive member 6 is available, in order to obtain a bias voltage of the traction means 2. An additional between the Brennkraftmaschi- ne 7 and the drive member 6 inserted spring means 9 amplifies the bias of the tension means. 2

In Figure 2 the mounting of the drive member 6 is illustrated, on the one hand via the spring means 9, in conjunction with a lever 10 and the other hand fixed to the internal combustion engine 7 via the pivot bearing 8 in conjunction with a housing. 11 The pivot bearing 8 comprises two integrally with the drive member 6 is connected, axially spaced holders 12a, 12b. In this case, the holder 12a is provided with a bore 13, whose position corresponds with a threaded bore 14 in the holder 12b. The holders 12a, 12b form an up would take 15 for the housing 11. A securing the housing 11 to the drive member 6 is effected by means of a formed as a machine screw threaded connection 16 which both holders 12a, connects 12b and in the mounted position in the threaded bore 14 the holder is screwed 12b. The screw 16 is also guided in a longitudinal bore 31 of a hollow pin inserted in the housing 11 eighteenth Log-adjusting annular gap 19, which radially outer 11 and is delimited radially inwardly from an outer surface 21 of the hollow bolt 18, is used by the bore 17 of the housing for receiving a slide bearing 20. Figure 3 shows an enlarged view of the pivot bearing 8 and illustrates so more details. In the installed state, the screw 16 causes a force-locking contact of the hollow pin 18 on deck discs 24a, 24b on the holders 12a, 12b. This measure has the effect upon pivotal movement of the drive element 6, a relative movement between the rotationally rigidly connected to the drive member 6 hollow pin 18 and the housing 11. In order to achieve a low-friction movement in the radially outward from the bore 17 of the housing 11 and radially inwardly from the outer - surface 21 of the hollow pin 18 limited annular gap 19, the plain bearing 20 is inserted which, according to figure 3, two spaced axially disposed slide bearing bushes 22a, 22b comprises.

A defined installation position of the slide bearing bushes 22a, 22b by means of fuse rings 23a, 23b secured, which are preferably arranged in an annular groove of the housing 11 in the region of the bore 17th In order to achieve a defined support of the hollow pin 18 on the holders 12a, 12b are cover plates 24a, 24b which are respectively inserted in an end receptacle 25a, 25b of the hollow bolt 18th The respective wall thickness of the cover plates 25a, 25b exceeds the axial length of the receptacle 25a, 25b, so that an axial overhang is established, a direct support of the hollow pin 18 on the holders 12a, 12b under binds.

The housing 11 is provided on both sides with thrust washers 26a, 26b, through which the housing is guided on the cover plates 24a, 24b 11, wherein the thrust washers 26a, 26b at the same time perform the function of a thrust bearing. The end-side recesses 27a, 27b of the housing 11 are designed so that this outside the thrust washers 26a, 26b largely enclose, to obtain a protected installed position. The thrust washers 26a, 26b are preferably sealed in the recess 27a, pressed 27b, so that a relative movement between the cover plates 24a, 24b and the thrust washers 24a, 24b is carried out during a pivoting movement of the drive element 6 in the region of the contact surfaces 29a, 29b. In order to achieve an effective seal of the particular for receiving the slide bearing 20 annular gap 19, each stop disk 26a, 26b respectively, a sealing ring 28a associated, 28b, the inserted form-fit in an associated annular groove 30a, 30b, sealingly against the mantle surface 21 of the hollow pin 18 abuts , The construction of the pivot bearing 8 allows a low-friction pivoting movement of the drive member 6 relative to the housing 11. For this purpose, an intended non-positive support of the holder 12a, 12b of the drive member 6 to the hollow pin 18 and the intermediate cover plates 24a, 24b, which by the screw 16 is ensured.

The screw is designed as a machine screw 16 is guided in the holder 12a in the bore 13 and further screwed into the threaded bore 14 of the holder 12b as well as with play in a longitudinal bore 31 of the hollow bolt out 18th The fitting tolerances of the rotary bearing 8 are chosen such that in the region of the contact surfaces 29a, 29b sets a defined installation clearance between the cover plates 24a, 24b and the thrust washers 26a, 26b, to obtain a friction-free adjustment movement of the drive member. 6

LIST OF REFERENCE NUMBERS

Traction drive 21 mantle surface tension means 22 a sliding bearing bush pulley 22 b plain bearing bushing driven member 23 a locking ring pulley 23 b circlip drive member 24 a cover disc internal combustion engine 24 b cover disc rotary bearing 25 a take-up spring means 25 b-up lever 26 a thrust washer housing 26 b Anlaufscheibea holder 27 a Aussparungb holder 27 b recess 28 a bore seal threaded bore 28 b 29 a sealing ring receiving contact surface 29 b fitting contact face bore 30 a ring groove hollow pin 30 b annular ring gap 31 longitudinal bore bearings

Claims

claims
associated 1. A device for the pivotable mounting of a, a traction drive (1) of an internal combustion engine (7) drive element (6), comprehensively a rotary bearing (8) between a stationary member and the drive member (6), a traction means (2) of the traction means drive (1) running wheels or pulleys (3, 5) of the drive member (6) and a driven element (4) connects, and the drive member (6) is simultaneously provided as a tensioning device, wherein a the drive member (6) loading slamming spring means (9) the bias of the tension means (2) ensures, characterized by a rotary bearing (8) between the constructed as a starter generator drive member (6) and the internal combustion engine (7) in that: - two axially spaced, integrally with the drive member (6) connected to the holder (12a , 12b) includes;
- a between the holders (12a, 12b) run, stationary arranged housing (11) having a bore (17);
- the bore (17) is determined of the housing (11) for receiving a hollow bolt (18);
- to fix the position of the hollow pin (18) and the housing (11), the holder (12a, 12b) is provided connecting screw (16) simultaneously into a longitudinal bore (31) of said hollow bolt (18) is inserted;
- in a radially of the housing (11) and the hollow pin (18) limited annular gap (19) a sleeve bearing (20) is inserted.
2. Device according to claim 1, wherein in the installed state of the hollow bolt (18) at both end faces each have a cover plate (24a, 24b) non-positively on the holders (12a, 12b) of the drive member (6) is supported.
3. Device according to claim 2, wherein for centering the cover plates (24a, 24b) of the hollow bolt (18) a stepped one step forming receptacle (25a, 25b).
4. Apparatus according to claim 2, wherein an outer diameter of the cover plate (24a, 24b) has an outer diameter of the hollow bolt (18) surpasses Ü.
5. Device according to claim 1 wherein the shields (24a, 24b) form an axial projection or supernatant to the end faces of the hollow pin (18) in the mounting position.
6. The apparatus of claim 1, wherein the housing (11) rotationally rigid with the thrust washers (26a, 26b) is connected which together with the deck plates (24a, 24b) contact surfaces (29a, 29b) form.
7. The apparatus of claim 6, wherein the thrust washers (29a, 29b) are made of a friction-reducing material, or at least in the region of the contact surfaces (29a, 29b) have a friction-reducing loading stratification.
8. The device according to claim 1, intended for the sealing of the sliding bearing (20) annular gap (19) sealing rings (28a, 28b) includes that the thrust washers (26a, 26b) are associated.
9. Device according to claim 1, wherein in the annular gap (19) two axially spaced bearing bushes (22a, 22b) are used which form (20) together the sliding bearing, wherein to determine the installation position of the slide bearing bushes (22a, 22b) retaining rings (23a , 23b are associated).
10. The apparatus of claim 1, wherein the rotary bearing (8) includes a wall thickness in a lien Fo formed sliding bearing (20).
11. The apparatus of claim 1, wherein at least one contact surface of the housing (11) or the hollow pin (18) which are supported to form the plain bearing (20) directly to one another, having a de reibungsmindem- coating.
12. The device is screwed to Claim 1, the rotary bearing (8) comprises a screw (16) a machine screw guided in a bore (13) of the holder (12a) and into a threaded bore (14) of the holder (12b) and a having stop position lock.
PCT/EP2004/009429 2003-09-25 2004-08-24 Device for pivotally mounting a drive element WO2005035956A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE2003144670 DE10344670A1 (en) 2003-09-25 2003-09-25 Apparatus for the pivotable mounting of a drive element
DE10344670.2 2003-09-25

Publications (1)

Publication Number Publication Date
WO2005035956A1 true true WO2005035956A1 (en) 2005-04-21

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Application Number Title Priority Date Filing Date
PCT/EP2004/009429 WO2005035956A1 (en) 2003-09-25 2004-08-24 Device for pivotally mounting a drive element

Country Status (2)

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WO (1) WO2005035956A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006081853A1 (en) * 2005-01-31 2006-08-10 Schaeffler Kg Device for fixing a member rotatable by a belt drive

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104786195B (en) * 2015-03-02 2017-05-10 中国北方车辆研究所 A motor mounting assembly and installation methods
FR3058772A1 (en) * 2016-11-16 2018-05-18 Renault Sas Engine fitted with an elastic link for tensioning the transmission belt

Citations (5)

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Publication number Priority date Publication date Assignee Title
US4904230A (en) * 1988-07-22 1990-02-27 Ntn Toyo Bearing Co., Ltd. Belt autotensioner
DE4300178C1 (en) * 1993-01-07 1994-04-28 Muhr & Bender Damped tensioner mounting for drive belt - has conical damping insert with axial spring to compensate for insert wear, damping system being protected by seal
US5938169A (en) * 1996-11-26 1999-08-17 Suzuki Motor Corporation Engine mounting for engine accessory
US6360712B1 (en) * 2000-05-01 2002-03-26 Daimlerchrysler Corporation Self-aligning and locking mount for engine accessory
DE10057818A1 (en) * 2000-11-21 2002-05-23 Ina Schaeffler Kg Tension element (belt) drive for internal combustion engine accessories, especially starter generator, has at least two pulleys with a tension element or belt connecting all pulleys

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8915249U1 (en) * 1989-12-29 1991-04-25 Robert Bosch Gmbh, 7000 Stuttgart, De
DE10045143A1 (en) * 2000-07-27 2002-02-07 Schaeffler Waelzlager Ohg Tensioning system for a belt-driven starter generator
DE10225268A1 (en) * 2002-06-07 2003-12-18 Ina Schaeffler Kg Tensioning device for a starter generator drive belt for a combustion engine, operates exclusively through an electronically regulated actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904230A (en) * 1988-07-22 1990-02-27 Ntn Toyo Bearing Co., Ltd. Belt autotensioner
DE4300178C1 (en) * 1993-01-07 1994-04-28 Muhr & Bender Damped tensioner mounting for drive belt - has conical damping insert with axial spring to compensate for insert wear, damping system being protected by seal
US5938169A (en) * 1996-11-26 1999-08-17 Suzuki Motor Corporation Engine mounting for engine accessory
US6360712B1 (en) * 2000-05-01 2002-03-26 Daimlerchrysler Corporation Self-aligning and locking mount for engine accessory
DE10057818A1 (en) * 2000-11-21 2002-05-23 Ina Schaeffler Kg Tension element (belt) drive for internal combustion engine accessories, especially starter generator, has at least two pulleys with a tension element or belt connecting all pulleys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006081853A1 (en) * 2005-01-31 2006-08-10 Schaeffler Kg Device for fixing a member rotatable by a belt drive

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