Ring piston seal for a hydraulically controlled disconnect system
First Claim
1. Hydraulically controlled disconnect system for a friction clutch of motor vehicles with a manually shiftable gear box, the disconnect system including a slave cylinder with a pressure housing (2) which is arranged concentrically in relation to a gear box input shaft (3) which connects an internal combustion engine with the gear box, a guiding sleeve (5) is arranged radially apart from and in a longitudinal bore of the pressure housing (2) to form a circularly configured pressure chamber (9), and a ring piston (7) is guided and axially movable in the pressure chamber (9) and includes a reinforced seal (8a, 8b) on the pressure chamber side, the reinforced seal (8a, 8b) having sealing lips (14, 15) which are arranged radially spread apart to form a V-shaped recess, the seal (8a, 8b) characterized with the following structure:
- the radially outer sealing lip (15) has a greater wall thickness in comparison with the radially inner sealing lip (14);
an axial length of the inner sealing lip (14), proceeding from a back (17a, 17b) of the seal or a plane surface of the seal (8a, 8b), exceeds an axial length of the outer sealing lip (15); and
a reinforcement (18a, 18b) connected to the seal (8a, 8b) to form-lock the seal on the piston ring (7) with an axial play "a" and a radial play ""r", wherein 0 mm >
"a">
2 mm and 0 mm>
"r">
1.5 mm.
3 Assignments
0 Petitions
Accused Products
Abstract
A hydraulically controlled disconnect system for a friction clutch of motor vehicles is provided and is constructed as a slave cylinder which includes a pressure housing (2) which is arranged concentrically in relation to a gear box input shaft (3). A guiding sleeve is arranged radially apart from the pressure housing to create a circularly configured pressure chamber (9) in which a ring piston (7) is axially guided and movable. A reinforced seal (8a) on the pressure chamber side of the ring piston (7). The seal (8a) includes sealing lips (14, 15) which are arranged radially spread apart. In accordance with the invention, the reinforcement (18a) of the seal (8a) is held form-locking on the ring piston (7) with a degree of axial and radial freedom.
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Citations
23 Claims
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1. Hydraulically controlled disconnect system for a friction clutch of motor vehicles with a manually shiftable gear box, the disconnect system including a slave cylinder with a pressure housing (2) which is arranged concentrically in relation to a gear box input shaft (3) which connects an internal combustion engine with the gear box, a guiding sleeve (5) is arranged radially apart from and in a longitudinal bore of the pressure housing (2) to form a circularly configured pressure chamber (9), and a ring piston (7) is guided and axially movable in the pressure chamber (9) and includes a reinforced seal (8a, 8b) on the pressure chamber side, the reinforced seal (8a, 8b) having sealing lips (14, 15) which are arranged radially spread apart to form a V-shaped recess, the seal (8a, 8b) characterized with the following structure:
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the radially outer sealing lip (15) has a greater wall thickness in comparison with the radially inner sealing lip (14); an axial length of the inner sealing lip (14), proceeding from a back (17a, 17b) of the seal or a plane surface of the seal (8a, 8b), exceeds an axial length of the outer sealing lip (15); and a reinforcement (18a, 18b) connected to the seal (8a, 8b) to form-lock the seal on the piston ring (7) with an axial play "a" and a radial play ""r", wherein 0 mm >
"a">
2 mm and 0 mm>
"r">
1.5 mm. - View Dependent Claims (3, 4, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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2. Hydraulically controlled disconnect system for a friction clutch of motor vehicles with a manually shiftable gear box, the disconnect system including a slave cylinder with a pressure housing (2) which is arranged concentrically in relation to a gear box input shaft (3) which connects an internal combustion engine with the gear box, a guiding sleeve (5) is arranged radially apart from and in a longitudinal bore of the pressure housing (2) to form a circularly configured pressure chamber (9), and a ring piston (7) is axially guided and movable in the pressure chamber (9) and includes a seal (8c) on the pressure chamber side, the seal (8c) having sealing lips (14, 15) which are arranged radially spread apart in a V-shape, the seal (8c) being characterized by:
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the seal having a one-piece construction with an axially projecting extension (28) from the sealing material and is fastened by form-locking on the ring piston (7) with the form-locking providing an axial play "a" and a radial play ""r", wherein 0 mm>
"a">
2 mm and 0 mm>
"r">
1.5 mm;the radial outer sealing lip (15) has a greater wall thickness in comparison with the radially inner sealing lip (14); and the inner sealing lip (14) has an axial length proceeding from a back (17c) of the seal (8c) which exceeds an axial length of the outer sealing lip (15). - View Dependent Claims (5, 12, 13)
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Specification