DE19732631A1 - Fluid friction clutch for vehicle - Google Patents

Fluid friction clutch for vehicle

Info

Publication number
DE19732631A1
DE19732631A1 DE1997132631 DE19732631A DE19732631A1 DE 19732631 A1 DE19732631 A1 DE 19732631A1 DE 1997132631 DE1997132631 DE 1997132631 DE 19732631 A DE19732631 A DE 19732631A DE 19732631 A1 DE19732631 A1 DE 19732631A1
Authority
DE
Germany
Prior art keywords
fluid friction
friction clutch
stop collar
bearing
working chamber
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE1997132631
Other languages
German (de)
Inventor
Kurt Klein
Hans Dipl Ing Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Behr GmbH and Co KG
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
Mahle Behr GmbH and Co 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 Behr GmbH and Co KG, Mahle Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Priority to DE1997132631 priority Critical patent/DE19732631A1/en
Publication of DE19732631A1 publication Critical patent/DE19732631A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D35/00Fluid clutches in which the clutching is predominantly obtained by fluid adhesion
    • F16D35/02Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part
    • F16D35/021Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves
    • F16D35/022Fluid clutches in which the clutching is predominantly obtained by fluid adhesion with rotary working chambers and rotary reservoirs, e.g. in one coupling part actuated by valves the valve being actuated by a bimetallic strip

Abstract

A fluid friction clutch has a drive plate (7) fixed to the end of a shaft (8) resting on roller bearings (10). The drive plate (7) is surrounded by a clutch chamber (2). The chamber (2) has a recess (13) with stop collar (14) accommodating the roller bearing outer ring (12). The stop collar (14) has a recess (15) whose outer limiting face (15a) is at a radius which is at least that of the chamber (2) recess (13).

Description

The invention relates to a fluid friction clutch a rotatably arranged on a driven shaft drive pulley and rotatable with a roller bearing the shaft mounted clutch housing with a working chamber for the drive pulley, the one turn with one for Working chamber indicating circumferential stop collar for on has the bearing outer ring of the rolling bearing.

Fluid friction clutches of this type are known for example from DE 44 41 808 A1 and are also manufactured and sold by the applicant in the type shown in FIG. 4 of the present application. In these types, in which the bearing outer ring of the rolling bearing is inserted from the outside into the corresponding recess of the clutch housing and is secured in its end position on the stop collar, forms at the bottom of the recess and on the outer edge of the stop collar facing the bearing we we the Rounding the installation edge of the bearing outer ring a circumferential gap space that can fill with clutch oil that can penetrate from the working chamber over the stop collar. This oil that collects in the annular space can penetrate to the outside between the outer race of the bearing and the bottom of the recess and can lead to oil loss in particular after a long period of operation. Such an oil loss can only be avoided by very complex machining, compliance with tight tolerances and compliance with the roundness, but due to the complex machining leads to high manufacturing costs.

It is therefore the object of the present invention with a times an oil loss, which also leads to a speed loss of the clutch and a connection temperature change tion can prevent.

To solve this problem, according to the invention in a Fluid friction clutch of the type mentioned above seen that the stop collar with at least one recess is provided, the outer boundary wall on a through knife is at least the diameter of the recess corresponds. By arranging such a recess an accumulation of oil between the bearing outer ring and the housing be prevented because of a return flow for the oil to Coupling inside and to the working chamber.

In a development of the invention, the distance between the outer Boundary wall from the axis of the turn to the work chamber mer increase, so that a return flow to the working chamber is promoted. In a further development of the invention finally several Aus evenly distributed over the circumference savings are provided, the boundary wall of which Rin NEN shape. With such a configuration radiative return flow of oil, which is on the bearing outer ring accumulates on the edge of the stop collar, allows. Pressure- and the impact of flying forces lead to backflow in this case the oil into the working chamber and not into an oil outlet occurs.

The invention is based on an embodiment in the Drawing shown and described below. It shows gene:  

Fig. 1 is a longitudinal section through the upper half of a sigkeitsreibungskupplung flues according to the invention,

Fig. 2 is a view of the stop collar between Arbeitskam seen mer and bearing outer ring in the direction of line II-II,

Fig., The enlarged view of the longitudinal section beat collar 3 by a recess according to the invention at the An,

Fig. 4 shows the representation, similar to that of FIG. 1, a fluid friction clutch according to the prior art and

Fig. 5 shows the enlarged representation of a bung Flüssigkeitsrei coupling according to the prior art, in a view similar to FIG. 3.

In Figs. 1 to 3, a fluid friction clutch is showing ge consisting of a coupling housing 1 with a Arbeitskam mer 2, which is sealed by an inserted plate 3 by egg ner side. The disc 3 is adjacent to a storage room 4 before, which in turn is closed by a lid 5 to the outside. In the storage chamber 4 there is a valve lever 6 in a known manner which, depending on the temperature or other parameters, opens an overflow opening (not shown) between the storage chamber 4 and the working chamber 2 .

In the can be filled with clutch fluid working chamber 1 of the Kupp lung housing 1 rotates a traction sheave 7, the rotationally fixed to a drive shaft 8 is connected, which in turn in a manner not shown, for example, with the motor shaft connected via a coupling sleeve. 9 The hitch be housing 1 is mounted on this drive shaft 8 by a roller bearing 10 , the inner ring 11 is pressed onto a shoulder of the drive shaft 8 and the outer ring 12 is in egg ne cylindrical recess 13 of the clutch housing is inserted, which towards the working chamber by a circumferential Stop collar 14 is limited.

While now in the embodiment according to the prior art technology, as shown in FIGS. 4 and 5, in which the same reference numerals are entered for the same parts, insofar as they are relevant, this stop collar 14 is a continuous ring, this is Stop collar 14 , as shown in FIG. 2 in particular, provided with uniformly distributed on its circumference at ordered recesses 15 which have the shape of radially extending grooves with a bottom serving as an outer boundary wall 15 a. This groove-shaped boundary wall 15 a has, as shown in particular in FIG. 3, a distance a from the axis 16 of the coupling, which increases to the working chamber 2 . Therefore, the recesses 15 form uniformly on the circumference of the stop collar 15 distributed troughs, which collects in front of the outer bearing ring on the side of the working chamber 2, can flow back through Fly action of force back into the working chamber 2 in which oil.

FIGS. 4 and 5 illustrate the example of the prior Tech nik that there such an effect can not occur. The stop collar 14 'is a continuous ring there. From the Ar beitskammer 2 coming oil, which is prevented from passing through the roller bearing 10 itself by a known seal 17 , can between the bearing outer ring 12 and the inner edge of the stop collar 14 'facing this into the annular space 18 , which occurs between the rotation 13 and the outer edge of the bearing outer ring 12 forms because of its rounding. From there it is possible due to the pressure and flying force effect that oil between the recess 13 and the bearing outer ring 12 penetrates to the outside and leads to an oil loss in the clutch, which in turn can result in a speed loss and thus in a switching temperature change.

The embodiment of the invention, as shown in FIGS. 1 to 3, prevents this disadvantage with simple means. For example, it is possible to pour the hitch be housing 1 accordingly with the recesses 15 so that no additional processing costs occur. With the invention, therefore, economical manufacturing tolerances can be maintained and the function can be ensured.

Claims (4)

1. Fluid friction clutch with a non-rotatably arranged on a driven shaft ( 8 ) drive pulley ( 7 ) and with a roller bearing ( 10 ) rotatably on the shaft gela gered clutch housing ( 1 ) with a working chamber ( 2 ) for the drive pulley, the one turn ( 13 ) with a circumferential stop collar ( 14 ) facing the working chamber for receiving the bearing outer ring ( 12 ) of the roller bearing, characterized in that the stop collar ( 14 ) is provided with at least one recess ( 15 ) whose outer boundary wall ( 15 a) lies on a diameter which corresponds at least to the diameter of the extension ( 13 ).
2. Fluid friction clutch according to claim 1, characterized in that the distance (a) of the outer boundary wall ( 15 a) from the axis ( 16 ) of the clutch from the bearing outer ring ( 12 ) to the working chamber ( 2 ) increases.
3. Fluid friction clutch according to claim 1 or 2, characterized in that several evenly distributed on the circumference of the stop collar ( 14 ) arranged recesses ( 15 ) are provided.
4. Fluid friction clutch according to one of the preceding claims, characterized in that the recesses ( 15 ) have the shape of radially extending grooves with a wall serving as a boundary ( 15 a) serving as a channel-shaped bottom.
DE1997132631 1997-07-30 1997-07-30 Fluid friction clutch for vehicle Withdrawn DE19732631A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997132631 DE19732631A1 (en) 1997-07-30 1997-07-30 Fluid friction clutch for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997132631 DE19732631A1 (en) 1997-07-30 1997-07-30 Fluid friction clutch for vehicle

Publications (1)

Publication Number Publication Date
DE19732631A1 true DE19732631A1 (en) 1999-02-04

Family

ID=7837250

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997132631 Withdrawn DE19732631A1 (en) 1997-07-30 1997-07-30 Fluid friction clutch for vehicle

Country Status (1)

Country Link
DE (1) DE19732631A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912963A (en) * 1957-06-26 1959-11-17 Applic Ind Commerciales Et Imm Fan and water pump unit for cooling an internal combustion engine
US2948268A (en) * 1957-08-26 1960-08-09 Eaton Mfg Co Engine accessory and drive mechanism therefor
DE1216036B (en) * 1962-08-31 1966-05-05 Schwitzer Corp Fluessigkeitsreibungskupplung with temperaturabhaengig controlled Fuellungsregelung
US3262528A (en) * 1964-03-18 1966-07-26 Schwitzer Corp Variable fluid torque coupling
EP0106532A1 (en) * 1982-09-30 1984-04-25 Household Manufacturing, Inc. Fluid shear coupling apparatus
DE3605443A1 (en) * 1986-02-20 1987-08-27 Fichtel & Sachs Ag Temperature-stabilized bearing in a visco coupling
DE3717773A1 (en) * 1986-05-27 1987-12-03 Household Mfg Viscose clutch
DE3739564C2 (en) * 1986-11-21 1989-10-26 Usui Kokusai Sangyo K.K., Shizuoka, Jp
DE4441808A1 (en) * 1994-11-24 1996-05-30 Behr Gmbh & Co Hydraulic friction clutch for automobile cooling fan

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2912963A (en) * 1957-06-26 1959-11-17 Applic Ind Commerciales Et Imm Fan and water pump unit for cooling an internal combustion engine
US2948268A (en) * 1957-08-26 1960-08-09 Eaton Mfg Co Engine accessory and drive mechanism therefor
DE1216036B (en) * 1962-08-31 1966-05-05 Schwitzer Corp Fluessigkeitsreibungskupplung with temperaturabhaengig controlled Fuellungsregelung
US3262528A (en) * 1964-03-18 1966-07-26 Schwitzer Corp Variable fluid torque coupling
EP0106532A1 (en) * 1982-09-30 1984-04-25 Household Manufacturing, Inc. Fluid shear coupling apparatus
DE3605443A1 (en) * 1986-02-20 1987-08-27 Fichtel & Sachs Ag Temperature-stabilized bearing in a visco coupling
DE3717773A1 (en) * 1986-05-27 1987-12-03 Household Mfg Viscose clutch
DE3739564C2 (en) * 1986-11-21 1989-10-26 Usui Kokusai Sangyo K.K., Shizuoka, Jp
DE4441808A1 (en) * 1994-11-24 1996-05-30 Behr Gmbh & Co Hydraulic friction clutch for automobile cooling fan

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MARTIN,Hans: Elektronisch geregelte elektromagnetische Visco-Lüfterkupplungen für Nutzfahrzeuge. In: ATZ Automobiltechnische Zeitschrift 95, 1993, 5, S.240-247 *

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Legal Events

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OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
8139 Disposal/non-payment of the annual fee