DE7129822U - Release device for clutches - Google Patents

Description

D: ', e innovation concerns a hydraulic release device for motor vehicles - Couplings or the like "consisting of one on the actuating element" the clutch acting AusrUoklager and one on a bearing ring dee Release bearing acting piston.

Hydraulic release devices for motor vehicle clutches »where a acted upon with pressure medium acting piston on the release bearing, are known. In the known constructions, however, the piston is made massive, so that the entire device is relatively heavy. aside from that In the known devices, the piston is provided with shoulders and recesses, so that for its production a laborious machining process is necessary. The manufacturing cost of this known Pistons are increased by the fact that the sliding surfaces to avoid Pressure losses must be processed very precisely.

The innovation is based on the task of a hydraulic release device for motor vehicle clutches or the like that is lightweight and simple in construction, so that cheap production is possible.

In the case of a hydraulic release device, this task is performed at the beginning mentioned type solved in that the on a bearing ring of the AuerUoklagers Acting piston consists of one or more thin-walled sheet metal parts.

This solution has the advantage over known constructions that it is simple and cheap to manufacture and is extremely economical. After further

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SKF KUQELLAaF ₁ RFAHFlIKEN * G ^ iEH '■

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Characteristics of the innovation consists of the piston au3 and an outer sleeve arranged pressure transducer, whereby two-shaped wolae the outer sleeve on at least part of its outer surface by a cap made of plastic or the like

is included. Through this MsSnshss --rden in advantageous wsIsä ή ± & demands for largely noise-damped external devices for clutches which cannot always be met with the equipment of conventional constructions.

Further features and advantages of the innovation can be found in the description of execution examples shown in the drawings. These show in:

Figure 1 shows a longitudinal section through a hydraulic release device according to the innovation and

FIG. 2 a · variant * of FIG.

The AusrUoklager 1 shown in Figure 1 is axially versohleblioh on a housing 2. A shaft 3, which carries a coupling (not shown), is guided through the housing 2. Of this clutch, only the release levers 4 are indicated, on which the bearing ring 5 of the release bearing 1 acts on the inner raceway. With its outer race bearing supporting ring € the release bearing 1 in the housing 2 is axially displaceable. The bearing ring 6 is encompassed by a Z-shaped angled outer sleeve 7 in which a pressure transducer 8 which is angled essentially in a stepped manner is arranged. Both the outer sleeve 7 and the pressure transducer 8, which both form the piston 19, consist of thin-walled shaped sheet metal parts that are manufactured without cutting. A seal Io is arranged in a shoulder 9 of the pressure transducer 8, which seals the pressure chamber 11 against the housing 2 on the side facing away from the coupling. The housing 2 has a shoulder 12 at this point, through which an axially directed bore 13, which is connected to a pressure medium supply line 14, leads into the pressure chamber 11. Between the bearing ring 6,

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SKF KUGELLAGEHFAERIKEN 'GMBH:

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the outer sleeve 7 and the radially directed flange of the pressure transducer 8 a ring 15 made of plastic or the like is used, which receives a seal 16 that seals the pressure chamber 11 from the release bearing 1. The outer sleeve 7 is encased on part of its outer surface by a cap 17, which is also made of plastic or the like * Via the cap 17 and the outer sleeve 7 acts on the bearing ring 6 of the AusrUoklager 1 a Compression spring l6, which ensures constant pretensioning of the release bearing 1.

As soon as a pressure builds up in the pressure chamber 11, which is greater than that exerted by the compression spring l8, the piston 19 acted on by the pressure medium moves the release bearing 1 to the left, which actuates the release lever k of the clutch with its bearing ring 5. Thanks to the cap 17 and the ring 15 *, both of which are made of plastic or the like, the release device develops very little noise during operation.

The structure of the release device shown in Figure 2 is fundamental the same as that shown in FIG. The bearing ring 6 of the Ausrücklagöfe 1 is not, for example, the »iem · l. essentially u-shaped angled, but provided with an axially geriohteten approach 2o, the OUTER SLEEVE 7 is inserted. In this approach 2o a substantially Z-shaped sliding ring 21 is pressed, which with its directed towards the coupling, axially extending legs on the housing 2 1st. Between the gloit ring 21 and the radially inwardly aligned flange of the pressure transducer 8 a seal 16 is arranged which, as in the example of FIG. 1, seals the pressure chamber 11 from the Ausrüoklager 1.

The two described and illustrated innovations according to the invention are of course no · exemplary embodiments. So it is also within the framework the idea of using a solid thrust bearing instead of the release bearing made from molded lead parts.

Claims (5)

SKP KUGELLAGEHFABRIKEN (3VSi Schweinfurt, 2.8.1971 claims for protection 1. Hydraulic release device for motor vehicle clutches or the like « Consists of a release bearing acting on the clutch actuation elements and one on a bearing ring of the release bearing acting piston, characterized in that the piston (19) consists of a or -> - consists of several thin-walled BLeohform parts (7, 8). 2. Hydraulic release device according to claim 1, characterized in that that the piston (19) is formed in at least two parts, one in the Cross-section essentially Z-shaped angled outer sleeve (7) one Bearing ring (6) of the release bearing (l) includes, while a cross-section in essential stepped angled pressure transducer (8) in the bore the outer sleeve (7) is arranged. J. Hydraulic release device according to claim 1 or 2 _S, characterized in that the outer sleeve (7) is encased at least on part of its outer surface by a cap (17) made of plastic or the like. 4. Hydraulic release device according to one of claims 1 to 5, characterized in that between the bearing ring (6) encompassed by the AtuSenhUlse (7), the outer sleeve (7) and a radially directed plan of the pressure transducer (8) a seal (l6 ) receiving ring (17) made of plastic or the like is used. 5. Hydraulic release device according to one of claims 1 to 4, characterized characterized in that a seal (lo) sealing against a stationary housing (2) or the like is inserted into the pressure sensor (8).