Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
  • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
  • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
  • F16H25/2266—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers arranged substantially in parallel to the screw shaft axis
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
  • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
  • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/20—Screw mechanisms
  • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
  • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
  • F16H25/2252—Planetary rollers between nut and screw
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D13/00—Friction clutches
  • F16D13/08—Friction clutches with a helical band or equivalent member, which may be built up from linked parts, with more than one turn embracing a drum or the like, with or without an additional clutch actuating the end of the band
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
  • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
  • F16D2023/123—Clutch actuation by cams, ramps or ball-screw mechanisms

Definitions

• the invention relates to a Planetenskylzgewindetrieb (PWG) of an actuator according to the preamble of the first claim and an actuator with a Planetenskylzgewinderios.
• Planetary rolling screw drives (PWG) also referred to as planetary roller screw drives or as planetary roller screw spindles
• PWG Planetary rolling screw drives
• a planetary roller screw drive is known which is contained in a hydrostatic actuator in the form of a hydrostatic clutch actuator in order to convert a rotational movement generated by means of an electric motor into an axial movement.
• a Planetenskylzgewindetrieb with a threaded spindle, and arranged with a threaded spindle on the nut, and with a plurality of circumferentially distributed between the threaded spindle and the nut arranged planetary, which are arranged abradably on the inner circumference of the nut and on the outer circumference of the threaded spindle, is Publication DE 10 2010 01 1 820 A1.
• a biasing means for the planet is provided, wherein the nut has two mutually axially movable male parts, and wherein the biasing means comprises a spring member urged against the one nut member.
• the nut takes on two functions: on the one hand, it is gear part and on the other hand, it is part of the pretensioner.
• DE 10 2014 202 1 18 A1 describes an actuator with Planetenxxlzgewindetrieb in which the axial stroke of the spindle is induced by a rotatably connected with sleeve and planetary roller carriers in connection rotor.
• a PWG is proposed with such asymmetric planetary rollers that they mesh in exactly one length range with a ring gear.
• the bearing of the planetary rollers takes place on both sides at the ends of the planetary rollers formed bearing journals, which are mounted in planetary roller carriers.
• the object of the invention is to develop a Planetenskylzgewinderios with mainly one-sided loading direction, in which a reduced axial length is made possible, and to provide an actuator with a corresponding Planetenskylzgewinderios. This object is achieved with the characterizing features of the first and eighth claim.
• the planetary roller screw drive is provided in particular for the actuation of a clutch of a vehicle, the planets having a planetary geometry for a particular unilateral force introduction, such that with a profiling of a spindle in a first length range, several planetary rollers are engaged with their profiles and the profiles of the planetary rollers in a second length range with a profiling of a ring gear surrounding the planetary rollers, the profiles are formed like a winding with projections and extending therebetween grooves and the planetary rollers axially parallel to the spindle and freely rotatable at both ends in planetary roller carriers are positioned about their own longitudinal axis, and wherein the planetary roller supports are rotatably supported.
• the planetary rollers at only one first end in the vicinity of the second length range on a bearing journal, with welhern they are stored in the first planetary roller carrier, while the planetary rollers are supported at their second end with their profiles in the second planetary roller carrier.
• the planetary rollers themselves are thus formed asymmetrically.
• the first length range (L- 1 ) is different from the second length range (L 2 ).
• the planetary rollers and the ring gear surrounding the planetary rollers are surrounded by an outer sleeve, which is formed in two parts, wherein a part receives the first planetary roller carrier and a second part forms the second planetary roller carrier.
• a friction device in the form of a wrap spring is preferably arranged between the outer sleeve and the ring gear.
• the radial support of the planetary rollers is proportional to the profi Herten ring gear area, as well as a first planetary roller carrier, in which the bearing journal is mounted at the first end of the planetary rollers.
• the planetary roller carrier is at least partially radially adjacent to the planetary rollers at the second end of the planetary rollers opposite the first end of the planetary rollers.
• the elevations of the profiles of the planetary rollers in the first length range are flattened. This embodiment leads to a surface load in the bearing, which has proven to be advantageous over rounded elevations of the profiles of the planetary roles.
• the flattening can be done for example via a turning and / or grinding process.
• the first end opposite the second end of the planetary rollers is preferably in operative connection with an axial securing plate.
• the small or rarely occurring axial force in the opposite direction to the main force direction is introduced from the front side of the planetary rollers in this axial locking plate.
• the axial securing plate is preferably metallic and can be made significantly thinner than the planet carrier with journal bearing on the opposite side.
• the planetary rollers and / or the axial securing plate are preferably rounded at their contact surface. This advantageously ensures a reduced drilling friction at the contact surface.
• Also according to the invention is an actuator, in particular for actuating a clutch in the drive train of a vehicle with a Planetenskylzgewindetrieb invention.
• Figure 1 a longitudinal section through a PWG according to the prior art with both sides
• Figure 2 a longitudinal section through an inventive PWG.
• the planetary rollers 3 engage in a first length range L- 1 with a first region of their profile P 3 1 in the profiling P 2 of the spindle 2 a.
• the planetary rollers 3 engage with a second area of their profiling P 3 2 in the profiling P 4 of the ring gear 4 encircling the planetary rollers 3.
• the planetary rollers 3 have at both ends bearing journals 7, with which they are in planetary roller carriers 5, 6 axially and radially are supported.
• the planetary rollers 3 and the planetary rollers 3 surrounding ring gear 4 are surrounded by an outer sleeve 9, which is formed in two parts, wherein a part receives the first planetary roller 5 and a second part forms the second planetary roller carrier 6. Between the outer sleeve 9 and the ring gear 4, a friction device in the form of a wrap spring 10 is arranged.
• FIG. 2 shows a longitudinal section through a PWG 1 according to the invention.
• the planetary rollers 3 engage in a first length range L- 1 with a first region of their profile P 3 1 in the profiling P 2 of the spindle 2 a.
• the planetary rollers 3 engage with a second region of their profiling P 3 2 in the profiling P 4 of the ring gear 4 encircling the planetary rollers 3.
• a bearing pin 7 is formed only at the first end of the planetary rollers 3. This is supported for the axial and radial mounting of the planetary rollers 3 in the main force direction in a first planetary roller carrier 5.
• a part of the radial support of the planetary rollers 3 in the main force direction is also realized via the ring gear 4 in the second length range L 2 .
• At the opposite end no bearing pin is formed.
• the radial support in the direction opposite to the main force direction force direction via the surveys of the profiles P 3 1 of the planetary rollers 3 in a first part of the first length range Lu Li.
• Lu of the first length range L-1 a second planetary roller carrier 6 is arranged radially adjacent to the planetary rollers 3, via which the radial support takes place.
• the elevations of the profilings of the planetary rollers 3 are flattened, which leads to a surface load in the bearing point.
• both the planetary rollers 3 and the axial securing plate 8 at the point of contact of the planetary rollers 3 to the axial securing plate 8 are flat educated.
• the planetary rollers 3 and the planetary rollers 3 surrounding ring gear 4 are surrounded by an outer sleeve 9, which is formed in two parts, wherein a part receives the first planetary roller 5 and a second part forms the second planetary roller carrier 6.
• an outer sleeve 9 and the ring gear 4 a friction device in the form of a wrap spring 10 is arranged.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Transmission Devices (AREA)
• Retarders (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=55701653

Family Applications (1)

Country Status (4)

Cited By (1)

Citations (5)

Family Cites Families (4)

• 2015
  • 2015-04-01 DE DE102015205963.4A patent/DE102015205963B3/de active Active
• 2016
  • 2016-03-15 KR KR1020177030790A patent/KR102594443B1/ko active IP Right Grant
  • 2016-03-15 CN CN201680019451.7A patent/CN107407343B/zh active Active
  • 2016-03-15 DE DE112016001577.1T patent/DE112016001577A5/de not_active Withdrawn
  • 2016-03-15 WO PCT/DE2016/200139 patent/WO2016155724A1/de active Application Filing

Patent Citations (5)

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