• 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 an actuator comprising a planetary rolling drive (VRP) screw, in particular for actuating a clutch of a vehicle, a plurality of planetary rollers (2) engaged with a profiling of a spindle (1), which intermesh, in a first longitudinal zone (L1), a ring gear (3) encircling the planetary rollers (2), the planetary rollers (2) extending axially parallel with respect to the axis longitudinally (A) and being mounted at both ends in a first and a second planet roll carrier (4, 5) so as to be freely rotatable about their own longitudinal axis, and the planet roller carriers ( 4, 5) being supported in a sleeve (6) encircling the ring gear (3) integrally in rotation and a friction element (7) being arranged between the ring (3) and the sleeve (6).
    公开号:FR3035465A1
    申请号:FR1653535
    申请日:2016-04-21
    公开日:2016-10-28
    发明作者:Lars Schumann；Laszlo Man；Peter Greb；Alexander Dreher
    申请人:Schaeffler Technologies AG and Co KG；
    IPC主号:
    专利说明:

    [0001] The present invention relates to an actuator comprising a planetary rolling drive (VRP) screw, which is used in particular for actuating a clutch of a vehicle. .
    [0002] Actuators can convert the rotational movement of one component into an axial movement of another component. The actuator itself can be in this context any type of linear actuator, for example a VRP actuator (VRP = planetary roller drive screw), a hydraulic slave cylinder, etc. A planetary roller drive (VRP) or planetary roller drive screws are formed from a spindle, a spindle nut and between said planetary rolling bodies disposed on the periphery, received in a planetary support. In this case, the spindle, the spindle nut and the planetary rolling bodies have profilings in order to transfer a rotational movement between the spindle and the spindle nut, one of the components - the spindle or the nut of the spindle. spindle - being rotated and the other component being moved, in case of an integral arrangement in rotation along the longitudinal axis of the spindle, of an axial path corresponding to a set gear ratio. In the present case, the planetary rolling bodies have two different profiled sections that mesh with the spindle and with the spindle nut and with profiled sections on the planetary rolling body. a groove shape and the other profiled sections on the planetary rolling body generally having a groove shape and, according to the embodiment, a complementary threaded section being disposed on the spindle or the spindle nut and, according to the groove section, on the other component. It is known from EP 320 621 A1 for example a VRP, for which the spindle has a thread and the spindle nut has grooves, on which planetary rolling bodies roll by means of profiled sections made of corresponding way, in a complementary manner. In the present case, the spindle axially fixedly mounted and rotated for example by an electric motor rotates relative to the screw nut rotatably arranged so that the screw nut is moved so that axial force and frictional rolling of the planetary bodies in the grooves of the spindle nut. In this case, there is a displacement proportional to the rotational speed of the spindle in the axial path of the spindle nut.
    [0003] Optimized efficiency drive screws (or VRPs) driven for example by means of an electric motor, particularly in actuators, such as hydrostatic clutch actions (Hydrostatic Clutch Actuator - abbreviated HCA) ), which operate against a load, for example a clutch characteristic curve, have a problem that, for a required holding of a position, a holding current, and therefore a torque are required in the E-motor, the drive screw (for example for a VRP) not being self-locking. For a VRP in an HCA having a rotationally integral crown nut for driven spindles, on which the axial displacement (relative to the spindle) is raised, further reduction of the spindle pitch occurs for an ideal unwind motion (As in a toothed planetary drive / no slip), said gear ratio can be freely selected by varying the spindle and / or planetary roller diameters within given limits. A major disadvantage of actuators of this type is that said actuators require a permanent holding current or that the position can not be maintained in the presence of a power failure / malfunction (for example cable, a plug drop).
    [0004] A clutch pressurized by the actuator then presents the great risk that the clutch closes involuntarily. Furthermore, the use of coiled springs for example for clutches is known.
    [0005] In a technical solution of the applicant which has not yet been published, a subassembly comprising a friction device provided with at least two components rotatable relative to each other is proposed in particular for actuation. of a vehicle clutch, in which a helical spring influencing, upon a relative rotation of the components, the degree of efficiency / friction is disposed between the relatively rotatable components relative to one another. to others. In this context, the coil spring forms at least in places a coiled spring, which may be a single spiral wound spring, a double spiral wound spring, or a coiled torsion spring. The double spiral wound spring described herein has two active zones, which are arranged one behind the other axially. The known solutions according to the state of the art have in common that the wound spring is surrounded by a VRP bush and has respectively a friction surface with respect to said bush and with respect to the crown of the VRP. Because of their function, both the crown and the socket are made of steel. Because of the steel-to-steel frictional pairing for frictional locations having a high frictional torque, it is to be expected, also in combination with a lubricant, to "attack" (cold seals) and resulting in high wear and abrasion, which can impair functionality or even lead to malfunction of the subset.
    [0006] It is an object of the present invention to overcome the disadvantages described by suitable friction matching and functional integration. Said object is achieved by means of an actuator 30 comprising a planetary rolling drive (VRP) screw, in particular for the actuation of a clutch of a vehicle, a plurality of planetary rollers being engaged with a rolling profile. a pin, which meshes, in a first longitudinal zone with a ring encircling the planetary rollers, the planetary rollers extending axially parallel to the longitudinal axis of the spindle and being mounted at the two ends, in a first and a second planet roll carrier so as to be freely rotatable about their own longitudinal axis, and the planet roller bearings being supported in a bushing circling the crown integrally in rotation relative to to the bushing and a friction element being disposed between the ring and the bushing, characterized in that the second The planetary roller support is in operative connection with the friction element in a second longitudinal region extending axially through a friction surface.
    [0007] Advantageous configurations are apparent from the detailed description hereinafter. The invention relates to an actuator comprising a planetary rolling drive (VRP) screw, in particular for actuating a clutch of a vehicle, a plurality of planetary rollers being engaged with a profiling of a spindle, which meshes, in a first longitudinal zone, with a crown encircling the planetary rollers. The planetary rollers extend axially parallel to the spindle and are mounted at two ends in a first and a second planetary roll holder so as to be freely rotatable about their proper longitudinal axis. The planetary roller supports are supported in a sleeve encircling the ring 5 firmly in rotation relative to the sleeve, a friction element being disposed between the ring and the sleeve. According to the invention, the second planetary roller support is in operative connection with the friction element in a second longitudinal zone extending axially through a friction surface. In this context, the second planetary roller support has an axially extending zone which is surrounded, in the area of the friction surface, at least in part with the sleeve. The second planetary roller support has, at its outer diameter, preferably a centering surface with respect to the bush, through which it is at least partially connected to the intermediate diameter of the bushing. the socket. As a result, the axial rigidity is advantageously improved. In a variant, the sleeve and the second planetary roller support are made in one part.
    [0008] The friction element is in particular a wound spring, preferably a wound spring with two spirals. The wound spring serves in particular to influence the degree of efficiency depending on the direction of rotation.
    [0009] In a preferred embodiment, the second planetary roller support is made from a material for a sliding bearing, preferably from a plastic material. As a result, the mass inertia of the rotating parts is advantageously maintained at a low level.
    [0010] In order to improve the wear behavior of the second planetary roller support with respect to the wound spring and to avoid insufficient lubrication, the second planetary roller support has at least one solid lubricant material. Advantageously, the wear behavior with respect to the planetary rollers is improved. For support in the socket, the second sun roller support has at least one stop. In addition, the second planetary roller support can be axially fixed on the front side with an axially locking plate. The moderate or rarely occurring axial force in the opposite direction to the direction of the main force is applied in said front end axial locking plate by the planetary roller supports. The axially locking plate is preferably made of metal. The second planetary roller support has mounting locations for positioning the planet rollers in the circumferential direction about the spindle, which ensure positioning of the planet members in the circumferential direction about the spindle. Advantageously, the friction contacts are in the system lubricated with grease or a comparable lubricant.
    [0011] The present invention is explained below in more detail using an embodiment and associated figures, but not limited thereto.
    [0012] FIG. 1 shows a longitudinal section of a planetary rolling drive screw according to the state of the art; FIG. 2 is a longitudinal section of a planetary rolling drive screw according to the invention; Figure 3: a planetary roller support according to the invention. Figures 1 and 2 respectively show a longitudinal section of a planetary rolling drive screw (VRP) according to the state of the art and a VRP according to the invention. In both variants, several planetary rollers 2 are engaged with a profiling of a spindle 1, which extend axially parallel to the longitudinal axis A of the spindle 1 and engage with a ring The planet rollers 2 are mounted at two ends in a first planetary roller holder 4 and a second planetary roller holder 5 so as to be freely rotatable about their longitudinal axis. The planetary roller supports 4 and 5 are integrally rotatably supported in a bushing 6 encircling the ring gear 3. A friction element 7 is disposed between the ring gear 3 and the bushing 6.
    [0013] In the planetary rolling drive screw according to the state of the art, as reproduced in FIG. 1, the friction element 7 is in active connection directly with the internal diameter 5 (without reference number). of the bush 6 via a friction surface 8.1. On the other hand, a planetary rolling drive screw is illustrated in Fig. 2, which is distinguished in that the second sun roller carrier 5 is constructed in such a manner that it is disposed in a second longitudinal zone L2. extending axially between the friction element 7 and the bushing 6 and thus is in active connection itself via a friction surface 8.2 at the inner diameter with the friction element 7. In the illustrated embodiment, the ring gear 3 engages only in a first longitudinal zone L1 with the planetary rollers 2. The second planetary roller support 5 is axially supported in the bush 6 by the intermediate of a stop 9. An additional axial support of the second sun roller support 5 is via an axially locking plate 11.
    [0014] The friction element 7 is made in the manner of a wound spring, which is in active connection via the second longitudinal zone L2 with the inner diameter of the second sun roller support 5 and in its region. axially connected thereto, by its inside diameter, with the outer diameter of the ring 3.
    [0015] FIG. 3 illustrates a second planetary roller support 5 according to the invention. The latter has, at its outer diameter, a friction surface 8.2, through which it is in active connection with the friction element not shown here a VRP. The second planetary roller support 5 has a centering surface at its outer diameter, through which it is in active connection at least in part with the inner diameter of the bushing. The second sun roller support 5 has, radially outwardly, at its outer diameter, a plurality of raised areas 12, which have an axial stop 9 for axial support in the socket and a rotatable support 12 serving blocking against rotation of the second planetary roller support 5 in the sleeve not shown here. The mounting of the planetary rollers in the sun roller support 5 takes place via the mounting locations 10. The second sun roller support 5 being preferably manufactured from a material for a plain bearing, the contact of Steel-steel friction is advantageously avoided at the outer radius of the friction element as known from the state of the art. The wear and abrasion are minimized and thus significantly improve both the good working condition and the life of the subassembly.
    [0016] Of course, the invention is not limited to the embodiments described above and shown by 3035465, from which we can provide other modes and other embodiments, without departing from the scope of the present invention. the invention.
    [0017] 3035465 12 Part Numbers 1 Spindle 2 Planetary Roller 3 Crown 4 First Planetary Roller Holder 5 5 Second Planetary Roller Holder 6 Bushing 7 Friction Element / Coiled Spring 8.1 Friction Surface (state of the art) 8.2 Friction Surface 10 9 Axial stop 10 Installation location 11 Axially locked plate 12 Raised part / rotary support 13 Centering surface 15 L1 First longitudinal zone L2 Second longitudinal zone A Longitudinal axis
    权利要求:
    Claims (8)
    [0001]
    REVENDICATIONS1. Actuator comprising a planetary rolling drive (VRP) screw, in particular for actuating a clutch of a vehicle, a plurality of planetary rollers (2) engaged with a profiling of a spindle (1), which meshes with a first longitudinal zone (LI) with a ring gear (3) encircling the planet rollers (2), the planet rollers (2) extending axially parallel with respect to the longitudinal axis (A) of the spindle (1) and being mounted at both ends in a first and a second planet roll carrier (4, 5) so as to freely rotate about their own longitudinal axis, and the roller supports planetary gears (4, 5) resting in a bushing (6) encircling the ring gear (3) integrally in rotation with respect to the bushing (6) and a friction element (7) being arranged between the ring gear (3) and the sleeve (6), characterized in that e second planetary roller support (5) is in operative connection with the friction element (7) in a second longitudinal region (L2) extending axially through a friction surface (8.2) .
    [0002]
    An actuator according to claim 1, characterized in that the second sun roller support (5) has an axially extending zone which is at least partly surrounded by the sleeve (6) in the area of the surface. friction (8.2). 3035465 14
    [0003]
    3. Actuator according to any one of claims 1 or 2, characterized in that the friction element (7) is a wound spring, in particular a coil spring with double spiral. 5
    [0004]
    Actuator according to one of Claims 1 to 3, characterized in that the second sun roller support (5) is made from a material for a plain bearing, in particular from a plastic material. 10
    [0005]
    5. Actuator according to any one of claims 1 to 4, characterized in that the second planetary roller support (5) has at least one solid lubricant material.
    [0006]
    6. Actuator according to any one of claims 1 to 5, characterized in that the second sun roller support (5) has at least one stop (9) for axial support in the sleeve (6).
    [0007]
    An actuator according to any of claims 1 to 6, characterized in that the second sun roller support (5) has mounting locations (10) for positioning the planet rollers (2) in the peripheral direction around the spindle (1).
    [0008]
    An actuator according to any one of claims 1 to 7, characterized in that the second sun roller support (5) is axially fixed on the front side with an axially locking plate (11).
    类似技术:
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    EP3963234A1|2022-03-09|Epicyclic step-down gear comprising at least one axial force transmission component which forms a radially eccentric force path
    同族专利:
    公开号 | 公开日
    DE102015207391B4|2016-11-10|
    DE102015207391A1|2016-10-27|
    CN106065927A|2016-11-02|
    CN106065927B|2020-08-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2015048961A2|2013-10-01|2015-04-09|Schaeffler Technologies AG & Co. KG|Assembly with friction arrangement|
    WO2017080548A1|2015-11-13|2017-05-18|Schaeffler Technologies AG & Co. KG|Actuator|
    US3003362A|1959-02-04|1961-10-10|Anderson Co|Motion-transmitting device|
    DE3739059A1|1987-11-17|1989-05-24|Deutsche Forsch Luft Raumfahrt|DEVICE FOR CONVERTING A ROTATIONAL MOVEMENT INTO AN AXIAL MOVEMENT|
    DE19540634C1|1995-10-31|1997-03-13|Deutsche Forsch Luft Raumfahrt|Mechanism converting rotary movement to axial|
    JP4786240B2|2005-07-27|2011-10-05|Ｎｔｎ株式会社|Electric linear actuator and electric brake device|
    JP5282998B2|2008-10-07|2013-09-04|Ｎｔｎ株式会社|Electric linear actuator and electric brake device|
    DE102011087560A1|2011-12-01|2013-06-06|Schaeffler Technologies AG & Co. KG|Planetenwälzgewindetrieb|DE102015205717B4|2015-03-30|2016-11-10|Schaeffler Technologies AG & Co. KG|Actuator with a planetary roller screw drive |
    CN109210164A|2017-07-03|2019-01-15|上海汽车集团股份有限公司|Planet roller screw mechanism, automobile hydraulic separation system and automobile|
    DE102018104095A1|2017-12-12|2019-06-13|Schaeffler Technologies AG & Co. KG|Planetary roller screw, actuator and release system|
    CN108799435A|2018-07-06|2018-11-13|杭州新剑机器人技术股份有限公司|planetary roller screw|
    法律状态:
    2017-04-28| PLFP| Fee payment|Year of fee payment: 2 |
    2018-05-02| PLFP| Fee payment|Year of fee payment: 3 |
    2019-04-29| PLFP| Fee payment|Year of fee payment: 4 |
    2020-04-29| PLFP| Fee payment|Year of fee payment: 5 |
    2021-04-23| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015207391.2A|DE102015207391B4|2015-04-23|2015-04-23|Actuator with a planetary roller screw drive |
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