WO2022253978A1 - Écrou de broche et ensemble broche/écrou de broche - Google Patents

Écrou de broche et ensemble broche/écrou de broche Download PDF

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Publication number
WO2022253978A1
WO2022253978A1 PCT/EP2022/065111 EP2022065111W WO2022253978A1 WO 2022253978 A1 WO2022253978 A1 WO 2022253978A1 EP 2022065111 W EP2022065111 W EP 2022065111W WO 2022253978 A1 WO2022253978 A1 WO 2022253978A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle
nut
spindle nut
clamping
elements
Prior art date
Application number
PCT/EP2022/065111
Other languages
German (de)
English (en)
Inventor
Gerald Baumbach
Original Assignee
Ejot Se & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ejot Se & Co. Kg filed Critical Ejot Se & Co. Kg
Publication of WO2022253978A1 publication Critical patent/WO2022253978A1/fr

Links

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
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • 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
    • 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
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H2025/2481—Special features for facilitating the manufacturing of spindles, nuts, or sleeves of screw devices
    • 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
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H2025/249—Special materials or coatings for screws or nuts

Definitions

  • the invention relates to a spindle nut according to the preamble of claim 1.
  • US Pat. No. 3,815,434 A discloses a spindle/spindle nut arrangement which has an articulated, two-part nut, with the two nut halves being locked together.
  • US 2019/0136901 A1 discloses a spindle-spindle nut assembly, which discloses a multi-part nut comprising coupling parts having internal threads, which are held pretensioned by a clamping ring so that they can be pre-fixed around a spindle.
  • a hexagonal cap which is matched to the coupling parts, is put over the coupling parts fixed to the spindle.
  • the hex cap has a through hole that is larger than the spindle OD, allowing the nut to be positioned at a desired location without rotation.
  • a spindle nut has two nut elements which together form an internal thread, each nut element having a hinge area.
  • the hinge portions of the two nut elements engage in an articulated manner, whereby in the open state the threaded portion of the nut member is outside the thread defined by the threaded portion of the other nut member.
  • the spindle nut can be mounted at a desired position on the spindle without having to turn the spindle nut along the entire length of the spindle.
  • the two hinge areas are designed in such a way that they are positively connected in the radial direction and detachably connected in the axial direction.
  • a tensioning area is arranged on the side of each nut element opposite the hinge area, with the two tensioning areas being connected via a pretensioned, spring-elastic tensioning element in such a way that the two tensioning areas are pressed towards one another under pretension.
  • the spring-elastic tensioning element presses the two nut elements against the spindle under elastic pretension, so that a spindle is accommodated in the spindle nut with largely no play, particularly in the axial direction.
  • the spring-elastic element makes it possible to compensate for deviations in terms of the dimensional, shape or positional deviations between the spindle and the spindle nut, so that a constant spindle torque is generated. Sufficient stability can be achieved by the form-fitting hinge design, so that sufficiently large prestressing forces can be realized.
  • the multi-part design of the spindle nut according to the invention enables simple assembly, since the two nut elements can be connected to one another at the point at which they are to be inserted into a spindle. They can be folded together using the hinge and connected in their clamping area using a clamping element.
  • the transmission structures required for torque transmission can preferably be part of the nut elements.
  • the plastic nut parts can thus have a wide variety of transmission structures in order to enable the relative rotation of the spindle nut to the spindle.
  • the nut elements are made of a plastic. Due to the elastic deformability of plastic compared to one made of metal, Especially steel, formed spindle is achieved that the mother under the applied prestressing force with its internal thread nestles particularly well against the thread contour of the spindle.
  • the spindle nut is designed in such a way that the sum of the partial circumferences of the internal thread of the nut elements is less than the circumference corresponding to the internal diameter of the thread. This means that the nut elements can be brought into a position relative to one another in which a prestress can be applied over a long period of time, since the nut elements cannot touch one another on the side opposite the hinge when installed.
  • the clamping area has stop elements in the axial direction, against which a fastened clamping element strikes, so that the clamping element is secured against loss in the axial direction.
  • An axial displacement of the two nut elements relative to each other is prevented by the thread of the spindle. It is provided that the distance between the stop web and the locking lug is greater, in particular approx. 1 to 2 mm greater, than the length of the tensioning element.
  • the clamping area has a stop element on both sides in the axial direction, in particular in its edge area, which is designed as a latching structure on at least one side, so that a latching connection can be established by an axial relative movement between the clamping element and the nut elements.
  • the clamping area can preferably have a groove running in the axial direction, in which the clamping element engages and is held there in a correspondingly form-fitting manner.
  • the tensioning element can advantageously be designed in the form of a spring clamp.
  • the spring clip which is in particular one-piece, preferably has an approximately V-shaped cross section, in particular with a latching curvature to ensure lateral engagement.
  • the spring clip preferably extends over at least 90% of the axial extent of the two nut elements. This allows a sufficiently large preload to be produced.
  • this relates to a spindle/spindle nut arrangement
  • a spindle nut as described above and one accommodated in the spindle nut Spindle.
  • the spindle nut and the spindle preferably have a trapezoidal thread with the same flank angle. In this way it can be achieved that the prestressing force results in a large-area contact of the two flanks, as a result of which the axial play between the spindle nut and the spindle is considerably reduced.
  • the clamping element, the plastic of the spindle nut and the spindle are matched to one another in such a way that the nut element deforms in the elastic range when it rests on the spindle.
  • an adjustable steering column includes a spindle-spindle nut arrangement according to the invention as described above. Since a fluctuating torque during the adjustment of a steering column is expressed by rising and falling noises from the drive motor, fluctuations in the drive noises that occur during the adjustment of the steering column can be reduced by the spindle and spindle nut arrangement according to the invention.
  • FIG. 1 shows a perspective view of a spindle/spindle nut arrangement according to the invention
  • FIG. 2 shows a perspective view of a spindle-spindle nut arrangement according to the invention in the assembled state
  • FIG. 3 shows a perspective view of a spindle/spindle nut arrangement according to the invention in the final assembled state
  • Fig. 4 is a sectional view of Fig. 3, and
  • Fig. 5 is a sectional view of Fig. 3.
  • the spindle nut 20 comprises two nut elements 22, 24 which are connected via a tensioning element 26.
  • Each nut element 22, 24 has a partial internal thread, so that an internal thread is formed by the two nut elements 22, 24, in which a spindle 30 is guided.
  • the nut element 22 has a clamping area 32 , a threaded area 34 and a hinge area 36 .
  • the threaded area 34 lies between the hinge area 36 and the clamping area 32.
  • the nut element 24 also has a clamping area 42, a threaded area 44 and a hinge area 46.
  • the hinge area 36 is designed in such a way that it comprises a sleeve that is open at the side over a partial area.
  • the angular range in which the sleeve 38 is recessed is less than 45°, so that a hinge movement of the two nut elements 22, 24 relative to one another is possible, but stable mounting is nevertheless ensured.
  • the nut element 24 has a hinge area 46 which is in particular partially designed as a cylindrical pin 48 which can be pushed into the sleeve 38 in the axial direction.
  • connection of the pin 48 to the threaded area 44 is designed in such a way that an axial relative movement is possible in the open state with the spindle 30 lying on the inside. In this way, the spindle nut 20 can easily be mounted at any point on the spindle 30 .
  • the clamping area 42 which is designed analogously to the clamping area 32, has a stop web 50 at one end in the axial direction.
  • stop area 42 has a latching lug 52 . Since the two clamping areas 32, 42 of the two nut elements 22, 24 are designed analogously, the clamping element 26 can be pushed over this locking lug that it is securely held between the stop web 50 and the locking lug in the axial direction.
  • the clamping element 26 exerts a spring force on the clamping areas 32, 42, which acts essentially in the tangential direction, so that the two nut elements 22, 24 are pressed against the spindle 30.
  • the flanks of the nut thread are pressed between the flanks of the spindle thread, so that an axial relative movement between the spindle 30 and the spindle nut 20 can be largely prevented.
  • the spindle nut and the spindle engage in one another without play in the axial direction.
  • the spindle nut 20 can be pressed against the spindle 30 to different extents, so that the spindle Spindle nut assembly 10 can be easily adjusted in terms of different frictional torques between the spindle 30 and the spindle nut 20.
  • FIG. 2 shows a perspective view of the spindle/spindle nut arrangement 10 with nut elements 22, 24 connected in the hinge area 36, 46, the nut elements 22, 24 in the clamping area 32, 42 not yet being connected via the clamping element 26.
  • the nut elements 22 , 24 rest more or less loosely on the spindle 30 .
  • Fig. 3 shows a spindle-spindle nut assembly 10 in a final assembly step.
  • the nut elements 22, 24 are pressed against the spindle 30 under pretension.
  • 4 shows a sectional view of the spindle nut 20 and spindle 30, it being seen that the spindle 30 bears laterally against the threaded region 34, 44 of the nut elements 22, 24 as a result of the two nut elements 22, 24 being pressed together.
  • FIG. 4 shows a longitudinal section through the spindle arrangement according to FIG. 3.
  • the threaded areas 34, 44 of the two nut elements 22, 24 are pressed against the spindle 30 in such a way that the flanks of the thread come into contact.
  • the spindle 30 and the spindle nut are matched to one another in such a way that when the flanks of the thread lie against one another, there is a radial distance R between the spindle 30 and the spindle nut 20 at the crests of the thread of the spindle. This prevents the spindle and spindle nut from coming into radial contact before the flanks touch one another.
  • FIG. 5 shows a cross section through the spindle-spindle nut arrangement 10.
  • the hinge axis A of the hinge area 36 lies in a plane with the central axis M of the spindle 30. This plane intersects the clamping element 26 in particular in its middle. This achieves a contact pressure distribution that is as uniform as possible.
  • the clamping element 26 is approximately V-shaped, with it being bent inward at the end of the legs in order to bear against the clamping areas 32, 42 of the spindle nut 20.
  • the sum of the partial circumferences of the partial threads of the individual nut elements 22, 24 is less than the corresponding spindle circumference. This enables the nut elements 22, 24 to be tightened while applying a preload force to the spindle 30 can be pressed because the two nut elements cannot come into contact in the direction of the clamping force.
  • a spindle-spindle nut arrangement 10 is created that allows for easy assembly and flexible adaptation to the frictional torque in the transition between the spindle and spindle nut and allows for largely backlash-free mounting in the axial direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne un écrou (20) de broche comportant deux éléments (22, 24) d'écrou dont chacun présente une région filetée (34, 44). Les régions filetées (34, 44) forment ensemble un filetage intérieur servant à guider une broche (30). Chaque élément (22, 24) d'écrou est doté d'une région (36, 46) d'articulation, les régions (36, 46) d'articulation des deux éléments (22, 24) d'écrou s'engageant l'une dans l'autre de manière articulée de telle façon que lorsque l'écrou de broche est ouvert, la région filetée (44) d'un élément (24) d'écrou se trouve en dehors du filetage défini par la région filetée (34) de l'autre élément (22) d'écrou. L'invention est caractérisée en ce que les deux régions (36, 46) d'articulation sont conçues pour être liées par complémentarité de forme dans la direction radiale et de manière libérable dans la direction axiale. Chaque élément (22, 24) d'écrou présente une région (32, 42) de serrage du côté de la région filetée (34, 44) opposé à la région (36, 46) d'articulation, et les deux régions (32, 42) de serrage sont liées par l'intermédiaire d'un élément (26) de serrage élastique à ressort de telle façon que les deux régions (32, 42) de serrage soient plaquées l'une vers l'autre sur la base d'une pré-tension générée par l'élément (26) de serrage élastique à ressort.
PCT/EP2022/065111 2021-06-02 2022-06-02 Écrou de broche et ensemble broche/écrou de broche WO2022253978A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021114381.0 2021-06-02
DE102021114381.0A DE102021114381A1 (de) 2021-06-02 2021-06-02 Spindelmutter und Spindel-Spindelmutter-Anordnung

Publications (1)

Publication Number Publication Date
WO2022253978A1 true WO2022253978A1 (fr) 2022-12-08

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ID=82218482

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Application Number Title Priority Date Filing Date
PCT/EP2022/065111 WO2022253978A1 (fr) 2021-06-02 2022-06-02 Écrou de broche et ensemble broche/écrou de broche

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DE (1) DE102021114381A1 (fr)
WO (1) WO2022253978A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE15112E (en) * 1921-05-24 Sectional coal-auger nut
US3669440A (en) * 1970-06-18 1972-06-13 Wilton Corp Quick engaging and disengaging nut mechanism
US3815434A (en) 1972-07-26 1974-06-11 Jackson G Quick action nut assembly for screw type jacks
US20190136901A1 (en) 2017-11-07 2019-05-09 Chun-Po Huang Quick connect nut
WO2021025132A1 (fr) * 2019-08-07 2021-02-11 テルモ株式会社 Dispositif d'entraînement et pompe médicale

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006051639A1 (de) 2006-11-02 2008-05-08 Schaeffler Kg Kugelgewindetrieb
TW201226723A (en) 2010-12-29 2012-07-01 Hon Hai Prec Ind Co Ltd Fastening member
US10465737B2 (en) 2017-12-12 2019-11-05 Chun-Po Huang Quick lock assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE15112E (en) * 1921-05-24 Sectional coal-auger nut
US3669440A (en) * 1970-06-18 1972-06-13 Wilton Corp Quick engaging and disengaging nut mechanism
US3815434A (en) 1972-07-26 1974-06-11 Jackson G Quick action nut assembly for screw type jacks
US20190136901A1 (en) 2017-11-07 2019-05-09 Chun-Po Huang Quick connect nut
WO2021025132A1 (fr) * 2019-08-07 2021-02-11 テルモ株式会社 Dispositif d'entraînement et pompe médicale

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Publication number Publication date
DE102021114381A1 (de) 2022-12-08

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