• 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 release cylinder (1) for actuating a friction element, in particular a friction clutch, with an actuating piston (3) displaceably mounted in an actuation cylinder (2) and adjacent to an actuation space (4), into which actuation space (4) a flow path (5 ) for an actuating medium, in particular air, with a at least two telescopically coaxial telescoping rod parts (7, 8) having piston rod (6) and within the piston rod (6) coaxially displaceable between a locking and a release position release pin (11) for an automatic adjusting device (12) arranged inside the piston rod (6) for the length of the piston rod (6), wherein the release pin (11) adjoining the actuating space (4) in the release position on an end face (24) or a stop (25 ) of the actuating cylinder (2) and is deflectable against a restoring force. A reliable automatic length adjustment can be realized in the release cylinder (1) in that the adjusting device (12) has at least one preferably wedge-shaped clamping element (13), which operatively connected to the release pin (11) and by this within the piston rod (6) between the first and second rod part (7, 8) is axially displaceable.
    公开号:AT516355A1
    申请号:T50685/2014
    申请日:2014-09-25
    公开日:2016-04-15
    发明作者:Burkhart Breinesberger；Roland Dipl Ing Hintringer；Udo Hans Dipl Ing Kneitz
    申请人:Avl Commercial Driveline & Tractor Engineering Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a disengaging cylinder for actuating a friction element, in particular a friction clutch, with an actuation chamber delimiting in an actuating cylinder actuating piston into which actuation space opens a flow path for an actuating medium, in particular air, with a piston rod having at least zweiteleskopartig coaxially movable rod parts piston rod and within the piston rod coaxially displaceable between a locking and a release position release pin for a piston rod length adjustment device located inside the piston rod, the release pin adjacent to the actuating chamber in the release position abutting against an end face or stop of the actuating cylinder and being deflectable against a return force.
    It is known to employ an adjusting device on clutch release cylinders to compensate for clutch wear and all component tolerances.
    From WO 2012/119 612 A1 there is known a pneumatically actuated self-adjusting clutch actuator for actuating a vehicle clutch, the adjuster comprising a disc-shaped locking body disposed within the actuating piston and a first rod member formed therewith, threadedly connected to a second rod member telescopically slidable in the first rod member , The two rod parts are pushed apart by a spring. In a lock division of the lock body, rotation thereof is inhibited by pressing a brake disk of the lock body against a friction surface of the operation piston. The shut-off body has a release pin projecting into the operating space, which is supported on the end face of the actuating cylinder when the operating space is relieved of pressure. In this release position, the brake disc is lifted by the actuating piston, whereby a relative rotation of the locking body is possible. By the thread thus takes a length adjustment and an adjustment of the clutch actuator.
    Further adjusting devices for brakes and transmission linkage are known from DE 2 255 281 A or DE 29 10 421 A1. The known Nachstellinrichtung have the disadvantage that they require a high production cost, take up a lot of space and / or are not always reliable.
    The object of the invention is to allow a reliable self-length adjustment with a release cylinder with the least possible effort.
    According to the invention this is achieved in that the adjusting device has at least one preferably wedge-shaped clamping element, which is operatively connected to the release pin and axially displaceable therethrough within the piston rod between the first and second rod part.
    Preferably, the clamping element has at least one pressure side with at least one pressure surface and a clamping side with at least one, wherein the pressure side and the clamping surface are arranged on opposite sides of the clamping element and, viewed in a longitudinal section, span one another at an angle of> 0 °. The clamping element is arranged between a first counter-surface formed by a first rod part and a second counter-surface formed by a second rod part, wherein preferably the pressure side of the first counter-surface and the clamping side of the second counter-surface is turned. It can be provided that the second mating surface is arranged farther away from the piston axis than the first mating surface. This allows a very compact design.
    Reliable locking of the telescoping relative movement of the two rod members can be achieved if at least one of the group of pressure surface and clamping surface, preferably the pressure surface, and the corresponding first and second counter surfaces, respectively, when viewed in longitudinal section, subtend an angle of> 0 ° with the piston axis , The other of the two surfaces-preferably the clamping surface-as well as the corresponding second or first opposing surface may, likewise in a longitudinal section, be formed parallel to the piston axis.
    In order to enable a secure release of the two rod parts for adjustment of the same, it is provided in a preferred embodiment of the invention that between the pressure surface and the first mating surface at least one preferably spherical rolling element is arranged, wherein preferably the pressure surface and / or the first mating surface at least one pocket for receiving the Has rolling elements. Jamming of the clamping element between the two rod parts can thus be largely excluded by the rolling body. in the blocking division of the release pin, which preferably opens out into the actuating space, the pressure surface and / or the clamping surface of the clamping element is pressed against the first and second opposing surfaces by a blocking force preferably formed by a locking spring. In the release position of the release pin, however, the clamping and pressure surfaces are relieved of pressure by axially displacing the clamping element against the locking force, wherein preferably the release pin is supported against a housing-fixed stopper formed in particular by the actuating cylinder.
    Preferably, the first rod part is fixedly connected to the actuating piston and the axially spaced from the actuating piston second rod member elastically, preferably supported by a reset spring on the actuating piston or on the first rod part.
    A particularly good clamping effect can be achieved if a plurality of clamping elements are arranged between the first rod part and the second rod part, wherein preferably the clamping elements are distributed uniformly over the circumference of the first rod part.
    The blocking division is associated with the open, ie actuated, clutch and the release position of the closed clutch. When the clutch is closed, the actuating piston is decoupled from the release mechanism and can self-adjust so that there is virtually no dead volume. Only when the clutch is operated, a rigid connection is made between the actuating piston and the second rod part leading to the disengaging mechanism of the clutch, and the clutch begins to open.
    In detail, this adjusting mechanism functions so that, with the clutch engaged, the actuating piston abuts against the rear end face of the actuating cylinder facing away from the disengagement mechanism. At this time, all clamping elements are released by the central release pin. Once the clutch is opened and the actuating piston moves a distance, the clamping elements are brought by the spring-loaded release pin in locking division (clamping position). In order for the clamping or releasing of the Klemmelementereibungsarm happens, the clamping elements are roller bearings.
    The invention is explained in more detail below with reference to the non-limiting figures.
    1 shows a known release cylinder for actuating a friction clutch, FIG. 2 shows a release cylinder according to the invention for actuating a friction clutch in a longitudinal section in a first position, FIG. 3 shows the detail III from FIG. 2, FIG. 4 the release cylinders according to the invention in a second position and FIG. 5 the detail V from FIG. 4.
    Fig. 1 shows a pneumatically actuated disengagement cylinder 101 for operating a friction clutch 130 for a vehicle. The disengagement cylinder 101 has an actuation cylinder 102 with an actuation piston 103 slidably mounted therein, which adjoins an actuation space 104 spanned by the actuation cylinder 102 and the actuation piston 103. A flow path 105 for an actuating medium, for example compressed air, opens into the actuating chamber 104. When the actuating space 104 is pressurized, the actuating piston 103 in FIG. 1 is deflected to the right and the friction clutch is opened via the piston rod 106, the actuating rod 131 and the pivot lever 132 according to the arrows S, the piston rod 106 acting on the actuating rod 131 via a sliding joint 110. When depressurized, the friction clutch 130 is closed via a return spring, not shown, wherein the actuating piston 103 is pushed back in Fig. 1 to the left. With release cylinders without an adjustment mechanism, the clutch wear and component tolerances can not be compensated. For release cylinders which do not have an adjustment mechanism, both of these additional deviations must be taken into account in designing the piston stroke of the release cylinder, so the actuating piston must have more travel than would actually be required to operate the friction clutch , This means that a certain amount of dead volume or air cushion must be generated, which has a negative effect on the controllability of such a system.
    Figures 2 to 4 show a pneumatically actuable disengaging cylinder 1 for actuating a friction element, for example a friction clutch for a vehicle. The disengagement cylinder 1 has an actuating piston 3, which is displaceably mounted in an actuating cylinder 2 and which delimits an actuating space 4. In the operating space 4, a flow path 5 opens for an actuating medium, for example air. The piston rod 6 has a first rod part and a second rod part 8, wherein the first rod part 7 is fixedly connected to the actuating piston 3. The first and second rod members 7, 8 are telescopically coaxially slidable in each other along the piston axis 3a, and the first rod member 7 can be partially inserted into the tubular second rod member 8. First and second rod part 7, 8 are biased by an adjusting spring 9, wherein the spring force of the actuating piston 3 and the second rod part 8 supporting Nachstellfeder 9 pushes the rod parts 7, 8 apart in the axial direction. The second rod part 8 engages via a sliding joint 10 on a not shown actuating rod.
    Within the first rod part 8 there is arranged coaxially a release pin 11 displaceable between a locking and releasing position for a piston rod 6 automatic adjusting device 12 arranged inside the piston rod 6, the release pin 11 penetrating and abutting at its first end 11a the piston surface 3b of the actuating piston 3 the control room 4 is adjacent. The first end 11a facing away from the second end 11b of the release pin 11 is operatively connected to a plurality of wedge-shaped clamping elements 13, which can be moved axially with this. Each clamping element 13 has a pressure side 14 and a clamping side 15 with a clamping surface 16, wherein the pressure side 14 and the clamping side 15 are arranged on opposite sides of the clamping element 13 and, viewed in longitudinal section, span an angle α> 0 ° with one another. The clamping elements 13 are axially displaceable in an annular cavity 19 spanned by the two rod parts 7, 8 and distributed uniformly around the circumference of the first rod part 7 between a first mating surface 17 formed by a first rod part 7 and a second mating surface 18 formed by the second rod part 8 Pressure side 14 of the first counter-surface 17 and the clamping side 15 of the second mating surface 18 are zugeeded. Since the second rod part 8 surrounds the first rod part 7, the second one is
    Counter surface 18 of the piston axis 3a further away than the first mating surface 17. The pressure side 14, as well as the corresponding first mating surface 17 span - viewed in longitudinal section - with the piston axis 3a at an angle β> 0 °. The clamping surface 16 and the corresponding second mating surface 18 are formed parallel to the piston axis 3a.
    In each embodiment, both the pressure side 14 and the first counter surface 17 each have a pocket 21, 22 for receiving the roller body 20.
    Figs. 2 and 3 show the release pin 11 in a locking pitch during an operation of the friction clutch.
    The piston rod 6 acts according to the arrow F on the not shown actuating rod to open the friction clutch. The release pin 11 is biased by a locking spring 23 relative to the first rod part 7 in the direction of the arrow P, wherein in the locking pitch of the release pin 11, the pressure side 14 and / or the clamping surface 15 of the clamping member 13 by the locking pin 23 acting on the release pin 11 against the first and second opposite surface 17, 18 is pressed. The pressure surface 14a of the pressure side 14 is thereby pressed against the first counter-surface 17 via the rolling body 20, as can be seen in FIG. The clamping element 13 rolls on the rolling elements 20 from.
    By the rolling elements 20 a low-friction clamping and releasing the clamping elements 13 is ensured.
    In FIGS. 4 and 5, the release pin 11 is shown in its release position associated with the closed friction clutch. In the release position, the release pin 11 abuts against the end face 24 or a fixed stop 25 of the actuating cylinder 2, as shown in FIG. The release pin 11 is thereby pressed against the force of the locking spring 23 in the first rod portion 7, whereby the pressure side 14 and the clamping side 15 are relieved of pressure by axially displacing the clamping elements 11 firmly connected to the release pin 11, wherein a gap 26 between the clamping surface 15 a of the clamping element 13 and the second mating surface 18 of the second rod part 8 is formed. As a result, the clamping connection between the first and second rod part 7, 8 is released and the rod parts 7, 8 are now coaxially displaceable, wherein the two rod parts 7, 8 are pushed apart by the Nachstellfeder 9. As soon as the friction clutch is reopened and the release pin 11 is again pushed out of the actuating piston 3 into the actuating space 4 by the locking spring 23, the clamping elements 13 are brought back into the clamping position by the spring-loaded release pin 11.
    With the friction clutch closed, the actuating piston 6 is decoupled from the disengaging mechanism of the friction clutch and thus allows for self-adjustment by means of the described adjuster 12 so that there is practically no dead volume. Only upon actuation - ie opening - of the friction clutch is a rigid connection established between the actuating piston 6 and the disengagement mechanism and the friction clutch begins to open. This allows in every release position a perfect play compensation, whereby a play-free operation is ensured when opening the friction clutch.
    权利要求:
    Claims (11)
    [1]
    CLAIMS 1. A release cylinder (1) for actuating a friction element, in particular a friction clutch, with an actuating piston (3) displaceably mounted in an actuating cylinder (2) and adjacent to an actuating space (4), into which actuating space (4) a flow path (5) for Actuation medium, in particular air, opens, with a at least two telescopically coaxial telescoping rod parts (7, 8) having piston rod (6) and within the piston rod (6) coaxially displaceable between a locking and a release position release pin (11) for one within the piston rod (6) automatic piston length (6) adjusting means (12), the release pin (11) adjacent the operating space (4) abutting against an end face (24) or stop (25) of the actuating cylinder (2) in the release position and is deflectable against a restoring force, characterized in that d in that the adjusting device (12) has at least one preferably wedge-shaped clamping element (13) which is operatively connected to the release pin (11) and axially displaceable therethrough within the piston rod (6) between the first and second rod parts (7, 8).
    [2]
    2. disengaging cylinder (1) according to claim 1, characterized in that the clamping element (13) has a pressure side (14) with at least one pressure surface (14a) and a clamping side (15) with at least one clamping surface (15a), wherein the pressure side (14 ) and the clamping side (16) are arranged on opposite sides of the clamping element (13) and, viewed in a longitudinal section, span an angle (a)> 0 ° with each other.
    [3]
    3. disengaging cylinder (1) according to claim 1 or 2, characterized in that the clamping element (13) between a first rod member (7) formed by a first mating surface (17) and a second rod member (8) formed by a second mating surface (18) Preferably, the pressure side (14) of the clamping element (13) of the first counter-surface (17) and the clamping side (15) of the clamping element (13) of the second counter-surface (18) are preferably turned.
    [4]
    The release cylinder (1) according to claim 3, characterized in that the second mating surface (18) is located farther from the piston axis (3a) than the first mating surface (17).
    [5]
    5. release cylinder (1) according to one of claims 3 to 4, characterized in that at least one surface of the group pressure surface (14a) and clamping surface (15a) - preferably the pressure surface (14a) -, and the corresponding first and second counter-surface (17 18), viewed in a longitudinal section, with the piston axis (3a) an angle (ß)> 0 ° spans.
    [6]
    A disengaging cylinder (1) according to claim 5, characterized in that the other of the two surfaces - preferably the clamping surface (15a) - and the corresponding second or first mating surface (18; 17), viewed in a longitudinal section, are parallel to the piston axis (3a). is trained.
    [7]
    7. disengaging cylinder (1) according to one of claims 3 to 6, characterized in that between the pressure surface (14a) and the first counter-surface (17) at least one preferably spherical rolling body (20) is arranged, wherein preferably the pressure surface (14a) and / or the first counter-surface (17) has at least one pocket (21, 22)) for receiving the rolling body (20).
    [8]
    8. disengaging cylinder (1) according to one of claims 3 to 7, characterized in that in the locking division of the - preferably opening into the actuating space - release pin (11) the pressure surface (14a) and / or the clamping surface (15a) of the clamping element (13) a preferably formed by a locking spring (23) blocking force against the erstebzw. second mating surface (17, 18) is pressed.
    [9]
    9. disengaging cylinder (1) according to claim 8, characterized in that in the release position of the release pin (11) the pressure surface (14a) and / or the clamping surface (15a) are relieved of pressure by axially displacing the clamping element (13) against the blocking force, preferably the release pin (11) is supported against a fixed housing stop (25) formed in particular by an end face (24) of the actuating cylinder (2).
    [10]
    10. disengaging cylinder (1) according to one of claims 1 to 9, characterized in that a plurality, preferably at least three, clamping elements (13) between the first rod part (7) and the second rod part (8) are arranged, wherein preferably the clamping elements (13) evenly distributed over the circumference of the first rod part (7).
    [11]
    Release cylinder (1) according to any one of claims 1 to 9, characterized in that the first rod part (7) is fixedly connected to the actuating piston (3) and the second rod part (8) axially spaced from the actuating piston (3) is resilient, preferably by a follower spring (8). 9) is supported on the actuating piston (2) or on the first rod part (7).
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3198163A1|2017-08-02|
    WO2016046126A1|2016-03-31|
    AT516355B1|2016-08-15|
    CN107076221A|2017-08-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2500454B1|1975-01-08|1976-06-16|Daikin Mfg Co Ltd|Device with adjusting mechanism for actuating a friction clutch|
    DE3719399A1|1987-06-11|1988-12-29|Wabco Westinghouse Fahrzeug|Device for operating a friction clutch disengageable counter to a spring force|
    DE10059375A1|2000-11-30|2002-06-06|Zf Sachs Ag|Operating unit for friction clutch in motor vehicle has compensating device with adjusting mechanism which with positioning mechanism is accommodated on one of two modules and movable relative to it|
    WO2005024262A1|2003-09-09|2005-03-17|Kongsberg Automotive As|Automatic reduction of the distance between the ends of a device for transferring a pressure force|
    EP1703160A1|2005-03-17|2006-09-20|Zf Friedrichshafen Ag|Release mechanism for a friction clutch of a motor vehicle|DE102017215582A1|2017-09-05|2019-03-07|Zf Friedrichshafen Ag|Pneumatic actuator with wear compensation|US3946845A|1974-12-31|1976-03-30|Kabushiki Kaisha Daikin Seisakusho|Clutch release clearance adjuster|
    JPH0110502Y2|1982-11-15|1989-03-27|
    WO2012119612A1|2011-03-07|2012-09-13|Kongsberg Automotive As|Self-adjusting clutch actuator for operating a vehicle clutch|
    CN202451659U|2011-11-21|2012-09-26|北汽福田汽车股份有限公司|Vacuum booster pump and clutch main pump|
    CN203157978U|2013-04-11|2013-08-28|温州市东启汽车零部件制造有限公司|Piston assembly with guide ring|DE102017205925A1|2017-04-06|2018-10-11|Zf Friedrichshafen Ag|Actuating device, in particular for a friction clutch|
    DE102017208603A1|2017-05-22|2018-11-22|Zf Friedrichshafen Ag|Actuating device, in particular for a friction clutch|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50685/2014A|AT516355B1|2014-09-25|2014-09-25|RELEASE CYLINDER FOR OPERATING A FRICTION ELEMENT|ATA50685/2014A| AT516355B1|2014-09-25|2014-09-25|RELEASE CYLINDER FOR OPERATING A FRICTION ELEMENT|
    CN201580051810.2A| CN107076221A|2014-09-25|2015-09-21|Extrusion cylinder for actuating friction element|
    EP15766822.9A| EP3198163A1|2014-09-25|2015-09-21|Release cylinder for actuating a friction element|
    PCT/EP2015/071591| WO2016046126A1|2014-09-25|2015-09-21|Release cylinder for actuating a friction element|
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