• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a pressure-medium-actuated piston-cylinder unit (1) with a piston (4) which is displaceably mounted in a cylinder (3) in the direction of a piston axis (4a) and secured against rotation about the piston axis (4a), wherein the Piston (4) with a first end (9a) of a push rod (9) and a second end (9b) of the push rod (9) with a release lever (10) is connected. In order to determine the position and the stroke of the piston (4) with low manufacturing and construction costs, it is provided that the push rod (9) with respect to a rotation about the piston axis (4a) - both with the piston (4) also with the release lever (10) is rotatably connected. According to the invention, the piston (4) is further firmly connected to a piston rod (8), which is connected to the push rod (9) preferably via a first bolt (15).
    公开号:AT512510A4
    申请号:T50143/2012
    申请日:2012-04-25
    公开日:2013-09-15
    发明作者:Mario Freidl；Burkhart Breinesberger
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    1 56371
    The invention relates to a pressure-medium-actuated piston-cylinder unit with a piston which is slidably mounted in a cylinder in the direction of a piston axis and secured against rotation about the piston axis, wherein the piston with a first end of a push rod and a second end of the push rod with a Ausrückhebei is connected.
    It is known in piston-cylinder units to equip the pistons with one or more permanent magnets in order to be able to detect the piston travel and / or the piston position. The field constructed by the magnets makes it possible to passively detect the piston position when using suitable sensors. In order to do this independently of possible piston rotations, usually ring magnets are used.
    Furthermore, it is known, especially with clutch actuator pistons, so-called " dip sensors " insert, which are arranged centrally in a clutch actuator housing and detect the position of the piston by means of a small ring magnet. However, this simple solution involves relatively large space problems.
    The use of segment magnets in place of ring magnets brings cost advantages - a segment magnet, for example, costs one-tenth of a ring magnet - and causes fewer problems in the allocation of space. However, since segment magnets are arranged only in certain peripheral regions of the piston, the piston must, however, be secured against rotation in the cylinder, which is associated with additional design effort.
    In DE 33 19 525 A, for example, a pressure-medium-operated piston-cylinder unit is proposed with a piston which carries a permanent magnet and having one or more magnet-sensitive sensors on the periphery of the cylinder. The permanent magnet is in the radial direction from the piston and is guided in a longitudinal groove of the cylinder jacket to thereby form an anti-rotation device for the piston.
    A disadvantage is that additional processing steps in the production of anti-rotation for the piston-cylinder unit are required.
    25-04 ^ 2012
    The object of the invention is to avoid these disadvantages and to determine the position and the stroke of the piston with low manufacturing and construction costs. In particular, an anti-twist device for the piston should be realized in the simplest possible way.
    According to the invention this is achieved in that the push rod - with respect to a rotation about the piston axis - is connected directly or indirectly non-rotatably with both the piston, and with the release lever.
    The fact that the rotation is done via the push rod, no further intervention in the cylinder are required. The jacket of the piston and the shell of the cylinder can be executed without protruding or re-entrant areas, which facilitates the production considerably.
    It is particularly advantageous if the connection between the push rod and the piston is effected by a first pin which is arranged in a first bore of the push rod arranged transversely to the piston axis, whereby the connection between push rod and release lever preferably takes place through a second bolt which is transverse to the longitudinal axis of the push rod Push rod is arranged in a second bore.
    The first and second bolts are designed as dowel pins, which connect the components to be secured piston and push rod or push rod and release lever so that no rotation about the piston axes is possible.
    The first bolt can be firmly pressed into a transverse bore of the piston rod.
    Furthermore, it can be provided that the piston is fixedly connected to a piston rod, which - preferably via the first bolt - rotatably in communication with the push rod, wherein preferably the first bolt is firmly pressed into a transverse bore of the piston rod. In order to avoid an unintentional displacement of the first bolt, this can be secured against movement transversely to the piston axis, preferably by the piston itself.
    In order to achieve a simple rotation between the push rod and the release lever, it is advantageous if the second pin in the second bore of the 3rd
    Push rod is firmly pressed, preferably the two ends of the second bolt protrude from the second transverse bore and - in the direction of rotation about the piston axis - are positively connected to the release lever, preferably the two ends of the second bolt arranged in substantially in the direction of the piston axis longitudinal grooves engage the release lever.
    The two ends of the push rod can thereby - at least in sections - have a spherical surface, wherein preferably the first end and / or the second end - at least in sections - has a spherical surface and in a correspondingly reciprocal spherical recess of the piston or the piston rod or is embedded in the release lever.
    The measurement of the Kobenhubes or the position of the piston can thus be carried out in a simple manner, if the distance measurement in a peripheral region of the piston at least one - is arranged magnet segment, which cooperates with a housing-fixed displacement sensor.
    The invention is explained in more detail below with reference to FIGS.
    Show it :
    1 shows a piston-cylinder unit according to the invention in a first oblique view,
    2 shows the piston-cylinder unit in a second oblique view,
    Fig. 3, the piston-cylinder unit in a longitudinal section according to the
    Line III-III in Fig. 4,
    4 shows the piston-cylinder unit in a longitudinal section along the line IV-IV in Fig. 3,
    5 shows a release lever together push rod in an oblique view,
    Fig. 6, the piston-cylinder unit in detail corresponding to the section along the line IV-IV in Fig. 3 and 4
    Fig. 7, the piston-cylinder unit in a section along the line VII-VII in Fig. 3rd
    The figures show a piston-cylinder unit 1 according to the invention, in the present case for actuating a clutch, not shown, of a vehicle.
    The piston-cylinder unit 1 has a housing 2 with a cylinder 3, in which a piston 4 is displaceably mounted in the direction of the piston axis 4a. The piston 4 can be deflected by feeding a pressure medium, for example compressed air, via the pressure line 5 a in the pressure chamber 6. The spring 7 serves to bias the complete system. With 5b, a vent channel for the non-pressure side 6a is designated. With the piston 4, a piston rod 8 is firmly connected. The movement of the piston 4 can be transmitted via a push rod 9 to a release lever 10, for example a clutch release lever, which acts on a deflection element 11, for example for a clutch.
    On the outer jacket of the piston 4, a magnetic segment 12 is arranged, which terminates substantially with the outer circumferential surface of the piston 4, so in no case protrudes from the lateral surface. Outside the housing 2, a displacement sensor 13 is arranged, which detects the magnetic field strength of the magnetic segment 12 and thus determines the position and the stroke of the piston 4.
    The piston 4 is secured against rotation with respect to the piston axis 4a, wherein the rotation of the piston 4 via the push rod 9 and the release lever 10 takes place. The release lever 10 is pivotable about an axis of rotation 10a, wherein the virtual axis of rotation 10a of the pivoting movement and the longitudinal axis 10b of the release lever 10 span a plane ε, which extends substantially normal to the piston axis 4a.
    With respect to the piston axis 4a, the push rod 9 is rotatably connected both with the piston 4 and with the release lever 10. The first end 9a of the push rod 9 is embedded in a correspondingly shaped recess 20 of the piston rod 8, whose inner surface is designated 20a. The push rod 9 has at its first end 9 a approximately normal to the piston axis 4 a extending first bore 14 in which a first bolt 15 is arranged. The first bore 14 extends transversely to the longitudinal axis 9 'of the push rod 9 or, for the 5th
    Piston axis 4a. The longitudinal axis 9 'of the push rod 9 coincides approximately with the piston axis 4a. Trained as a dowel pin first pin 15 penetrates corresponding transverse bores of the piston rod 8 and is secured by formed by the piston 4 shoulder 16 against radial falling out. The first bolt 15 is firmly pressed into the transverse bores of the piston rod 8.
    Analogous to the first end 9a, the second end 9b has a second bore 17 normal to the piston axis 4a and longitudinal axis 9 'of the push rod 9, wherein the second bore 17 in the plane spanned by the axis of rotation 10a and the longitudinal axis 10b of the release lever 10 level ε is located. In the second bore 17, a second pin 18 is pressed firmly, wherein the ends 18a, 18b of the second pin 18 on both sides of the second transverse bore 17 protrude from the push rod 9 and in the direction of the piston axis 4a and longitudinal axis 9 'of the push rod 9 arranged lateral longitudinal grooves 19 of the release lever 10 slide. The longitudinal grooves 19 are arranged on the inner surfaces 21a of the recess 21 of the release lever 10, in which the second end 9b of the push rod 9 is embedded.
    As shown in FIGS. 3 and 4, the two ends 9a and 9b of the push rod 9 may have a spherical surface which is received by correspondingly spherical-shaped inner surfaces 20a, 21a of the piston rod 8 and the release lever 10, respectively.
    The power transmission takes place only via the spherical surfaces of the push rod 9 and the spherical inner surfaces 20a, 21a of the piston rod 8 and the release lever 10. The bolts 15, 18 serve only to prevent rotation.
    To align the push rod 9 during assembly, this has a flattening 22.
    In the described piston-cylinder unit 1 cost magnetic segments 12 can be used instead of ring magnets, the structural complexity for producing a rotation for the piston 4 can be kept to a minimum.
    权利要求:
    Claims (11)
    [1]
    6 6

    Patent claims 1. A pressure medium-operated piston-cylinder unit (1) with a piston (4) which is slidably mounted in a cylinder (3) in the direction of a piston axis (4a) and secured against rotation about the piston axis (4a), wherein the piston (4) with a first end (9 a) of a push rod (9) and a second end (9 a) of the push rod (9) with a release lever (10) is connected, characterized in that the push rod (9) - with respect to a rotation the piston axis (4a) - with both the piston (4), and with the release lever (10) is rotatably connected.
    [2]
    Second piston-cylinder unit (1) according to claim 1, characterized in that the connection between the push rod (9) and piston (4) by a first pin (15), which in a transverse to the piston axis (4a) arranged first Bore (14) of the push rod (9) is arranged.
    [3]
    3. piston-cylinder unit (1) according to claim 1 or 2, characterized in that the connection between the push rod (9) and release lever (10) by a second pin (18) which transverse to the longitudinal axis (9 ') of the push rod (9) in a second bore (17) is arranged.
    [4]
    4. piston-cylinder unit (1) according to one of claims 1 to 3, characterized in that the piston (4) is fixedly connected to a piston rod (8), which - preferably on the first pin (15) - rotatably with the push rod (9) is in communication.
    [5]
    5. piston-cylinder unit (1) according to one of claims 1 to 4, characterized in that the first bolt (15) by a captive against displacement transverse to the piston axis (4a) is secured, preferably the captive by shoulders ( 16) of the piston (4) is formed.
    [6]
    6. piston-cylinder unit (1) according to one of claims 1 to 5, characterized in that the first bolt (15) in at least one transverse bore of the piston rod (8) is firmly pressed.




    [7]
    7. piston-cylinder unit (1) according to one of claims 3 to 6, characterized in that the second bolt (18) in the second bore (17) of the push rod (9) is firmly pressed, wherein preferably the two ends ( 18a, 18b) of the second bolt (18) protrude from the second bore (17) and - with respect to a rotation about the Koibenachse (4a) -form-locking manner with the release lever (10) are connected.
    [8]
    8. piston-cylinder unit (1) according to claim 7, characterized in that the two ends (18a, 18b) of the second bolt (18) in substantially in the direction of the piston axis (4a) arranged longitudinal grooves (19) of the release lever ( 10) intervene.
    [9]
    9. piston-cylinder unit (1) according to claim 8, characterized in that the longitudinal grooves (19) on the inner surfaces (21 a) of a recess (21) of the release lever (10) are arranged, in which recess (21) the second End (9b) of the push rod (9) engages.
    [10]
    10. piston-cylinder unit (1) according to one of claims 1 to 9, characterized in that the first end (9 a) and / or the second end (9 b) of the push rod (9) - at least in sections - has a spherical surface and in a correspondingly reciprocal spherical recess (20; 21) of the piston (4) or the piston rod (8) and the release lever (10) is embedded.
    [11]
    11. Piston-cylinder unit (1) according to one of claims 1 to 10, characterized in that for the travel measurement in a jacket region of the piston (1) at least one - preferably exactly one - magnet segment (12) is arranged, which is fixed to the housing Displacement sensor (13) cooperates. 2012 04 25 Fu / Bt
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    同族专利:
    公开号 | 公开日
    AT512510B1|2013-09-15|
    DE112013001069A5|2014-11-06|
    WO2013160237A1|2013-10-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2223424A|1938-04-18|1940-12-03|Kelsey Hayes Wheel Co|Master cylinder|
    GB2105880A|1981-09-11|1983-03-30|Automotive Prod Co Ltd|Improvements in clutch servo mechanisms|
    EP1602543A1|2004-06-04|2005-12-07|ZF Friedrichshafen AG|Master cylinder|
    WO2007069955A1|2005-12-15|2007-06-21|Volvo Lastvagnar Ab|Method for detecting clutch cylinder leakage|
    DE3319522C2|1983-05-28|1985-08-29|Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen|Pressure fluid operated piston-cylinder unit|
    DE10238402A1|2002-08-22|2004-03-04|Zf Sachs Ag|Piston-cylinder unit|
    DE102004053913B3|2004-11-05|2006-06-14|Fte Automotive Gmbh|Piston arrangement of a hydraulic actuator on motor vehicles|
    DE102009005828A1|2009-01-22|2010-07-29|Fte Automotive Gmbh|Slave cylinder for a vibration-damped hydraulic power transmission system, in particular a hydraulic clutch control for motor vehicles|
    DE102010054291A1|2009-12-22|2011-06-30|Schaeffler Technologies GmbH & Co. KG, 91074|Master cylinder device for hydraulic system of motor vehicle, has piston movable to and fro in master cylinder, and joint socket provided at piston rod that is hinged at piston using socket, where joint head is provided at piston|FR3051856B1|2016-05-27|2018-05-25|Valeo Embrayages|HYDRAULIC TRANSMITTER CYLINDER FOR A HYDRAULIC CONTROL DEVICE|
    FR3054272B1|2016-07-25|2018-09-07|Valeo Embrayages|HYDRAULIC CYLINDER RECEIVER, IN PARTICULAR FOR A HYDRAULIC CONTROL SYSTEM OF A CLUTCH|
    法律状态:
    2018-12-15| MM01| Lapse because of not paying annual fees|Effective date: 20180425 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50143/2012A|AT512510B1|2012-04-25|2012-04-25|Pressure-medium-operated piston-cylinder unit|ATA50143/2012A| AT512510B1|2012-04-25|2012-04-25|Pressure-medium-operated piston-cylinder unit|
    PCT/EP2013/058276| WO2013160237A1|2012-04-25|2013-04-22|Piston-cylinder unit actuated by a pressure medium|
    DE112013001069.0T| DE112013001069A5|2012-04-25|2013-04-22|Pressure-medium-operated piston-cylinder unit|
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