EP4408723A1 - Schubgestänge für einen linearaktuator und linearaktuator mit einem schubgestänge - Google Patents
Schubgestänge für einen linearaktuator und linearaktuator mit einem schubgestängeInfo
- Publication number
- EP4408723A1 EP4408723A1 EP22789464.9A EP22789464A EP4408723A1 EP 4408723 A1 EP4408723 A1 EP 4408723A1 EP 22789464 A EP22789464 A EP 22789464A EP 4408723 A1 EP4408723 A1 EP 4408723A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spindle
- shoulder
- rod
- linkage
- securing element
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0442—Conversion of rotational into longitudinal movement
- B62D5/0445—Screw drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0421—Electric motor acting on or near steering gear
- B62D5/0424—Electric motor acting on or near steering gear the axes of motor and final driven element of steering gear, e.g. rack, being parallel
Definitions
- the invention relates to a thrust linkage for a linear actuator of an axle steering of a vehicle, comprising at least a first rod and a spindle for converting a rotary movement of a drive device into a linear movement of the thrust linkage, the spindle having a spindle shoulder and, at a first axial end, a first connecting shoulder for connection to of the first rod.
- linear actuators are known from the prior art for linear actuators.
- Such linear actuators are used, for example, in rear-axle steering systems on motor vehicles for rear-axle steering. It is usual that a shoulder with a non-round geometry or radial projections is or are formed on a rod as an anti-rotation device, which interacts with a corresponding geometry on a housing of the linear actuator to prevent rotation of the linkage.
- EP 1 911 660 A1 discloses a linear actuator with a thrust linkage, which comprises a spindle and a rod connected thereto, with an anti-twist device being formed on the rod, which secures the thrust linkage relative to a housing in the circumferential direction.
- a thrust linkage according to the invention is characterized in that the spindle has a receiving shoulder between the spindle shoulder and the first connecting shoulder with a securing element received thereon in a rotationally fixed manner to prevent the sliding linkage from rotating, the securing element being held in the axial direction between the spindle shoulder and the first rod.
- the axial direction is to be understood as meaning the longitudinal direction of the thrust linkage.
- the longitudinal direction of the push rod is a transverse direction of the motor vehicle.
- the invention now includes the teaching that a securing element which is independent of the first rod, ie manufactured as a single part, is used to prevent rotation, which is pushed onto a shoulder of the spindle and held axially between the spindle and the first rod. Since the spindle is usually made of a different material than the first rod and a two-part design of spindle and first rod is therefore essential, the connection can be cleverly used by the invention to achieve axial securing of the securing element. Forming an anti-twist device on the first rod is therefore no longer necessary.
- the securing element is also independent of the first rod as a single part and can therefore be manufactured in a simple manner. When assembling the thrust linkage, the securing element can also be slid easily onto the spindle via the first connecting shoulder.
- the securing element is held axially between the spindle and the first rod in that the spindle shoulder and the first rod each have a larger outer radius than the receiving shoulder and thus protrude radially beyond the securing element.
- the spindle, receiving shoulder and/or first rod do not have a round geometry at the joints between one another, radial projection is to be understood in such a way that the spindle and first rod project radially beyond the securing element at least over part of the circumference, in particular in sections.
- the push linkage can also have a second rod which is connected to the spindle via a second connecting shoulder of the spindle. The second connecting shoulder then lies on a second axial end of the spindle, which is opposite the first end.
- the receiving shoulder has a non-round outer geometry for the non-rotatable connection of the receiving shoulder to the securing element and the securing element has a corresponding inner geometry.
- the outer geometry is a polygon or knurling.
- the securing element has a non-round outer geometry.
- a corresponding counter-geometry can then be provided on a housing of the linear actuator, in which the securing element is secured against twisting due to its non-round geometry.
- Such a counter-geometry can also serve as an axial guide surface for the securing element when the push linkage is adjusted.
- the securing element is particularly preferably formed from a material with good sliding properties or is coated with such a material on contact surfaces which are intended for contact with such a guide surface.
- the securing element is formed in multiple parts from a radially inner retaining element and a radially outer sliding element connected in a rotationally fixed manner to the retaining element.
- the retaining element is then intended to hold the securing element on the receiving shoulder and to transmit a force between the securing element and receiving shoulder in the anti-twist device.
- the holding element is made of a correspondingly strong material, for example a metal.
- the sliding element is intended to slide along a guide surface of a housing with as little friction as possible. In particular, when a torsional load is applied to the push linkage, there is a pressure between the securing element and the guide surface, which could prevent an axial movement of the securing element if the friction is too high.
- the holding element for the non-rotatable connection of the holding element to the sliding element preferably has a non-round outer geometry and the sliding element has a corresponding inner geometry. In particular, it is a knurling. The sliding element is then held securely on the holding element.
- the holding element is held in the axial direction between the spindle shoulder and the first rod and the sliding element is held axially relative to the holding element.
- a very large radial overhang of the spindle shoulder and the first rod over the securing element is then not necessary.
- the holding element has a radially extending projection and the sliding element has a corresponding recess or the sliding element has a radially extending projection and the holding element has a corresponding recess.
- Such projections and recesses can interrupt knurling, for example.
- the securing element prefferably produced in one piece from a material that simultaneously has good strength properties and favorable friction properties. Furthermore, it is also alternatively possible for the securing element to be formed from a solid material which is coated with an anti-friction coating on the contact surfaces.
- the spindle has a thread on the first connecting shoulder, the first rod having a mating thread, and the spindle being connected to the first rod by screwing the thread to the mating thread.
- the securing element can then have an axial overhang over the receiving shoulder, so that by means of the screw connection the first rod presses the securing element with an end face against a flank of the spindle shoulder.
- the threads are designed in such a way that the screw connection is self-locking.
- the screw connection can also be additionally glued.
- the securing element is then held particularly securely in the axial direction.
- other fastening means can be provided between the spindle and the first rod, such as such as clamping means, an adhesive bond or a press fit in which the parts are thermally joined.
- the invention further relates to a linear actuator for an axle steering of a vehicle with an axially movably mounted push rod as described above, a drive device for axial adjustment of the push rod and with a gear for converting a rotary movement of the drive device into a linear movement of the push rod by means of the spindle and a spindle nut acting on it.
- the linear actuator uses the above-described advantages of the thrust linkage just like the thrust linkage or also has them.
- the linear actuator preferably has a stationary housing and the housing has a guide geometry for axially guiding the securing element, with the securing element being held in a rotationally fixed manner on the guide geometry.
- a stationary arrangement of an element is understood to mean that this element is positioned and held independently of the movement of the thrust linkage, ie when the thrust linkage is adjusted it does not move with it or its position is influenced by its movement.
- such an element can be fixed to a housing of the linear actuator or to the underbody of a motor vehicle to which the linear actuator is attached.
- the guide geometry is in particular formed from a sliding material with a low coefficient of friction or is coated with such a material.
- POM or PTFE for example, can be used as a sliding material for this application and for all other applications described above, in which a material should have favorable friction properties.
- FIG. 1 shows a simplified representation of a linear actuator
- FIG. 2 shows a thrust linkage according to the invention
- FIG. 3 shows a thrust linkage according to FIG. 2 in an exploded view
- FIG. 4 shows a spindle with a securing element arranged on it.
- FIG. 1 shows a linear actuator 1 with a housing 2 in which a push rod 7 (not shown here) is guided.
- a drive device 3 which is arranged parallel to the push rod 7 and whose drive power is transmitted to the push rod 7 via a belt drive 4 in a belt housing, acts on the push rod 7 .
- Arranged at the ends of the push linkage 7 are forks 5.1, 5.2, by means of which a linear movement of the push linkage 7 can be transmitted to the wheels of a vehicle.
- a sensor housing 6 is also arranged on the linear actuator 1 .
- FIG. 2 shows a thrust linkage 7 with a centrally arranged spindle 8 and rods 9.1, 9.2 arranged at the ends of the spindle 8.
- a securing element 10 is arranged between the spindle 8 and a first rod 9.1, which is pushed onto a receiving shoulder of the spindle 8.
- the securing element 10 has a non-round outer geometry 10.1, which is designed here as a square geometry with truncated corners. With the non-circular geometry 10.1, the securing element 10 is guided axially on a counter-geometry (not shown) in the housing 2 and held in a torsion-proof manner.
- FIG. 3 shows the thrust linkage 7 from FIG. 2 in an exploded view.
- the spindle 8 has a spindle shoulder 8.1, a first connecting shoulder 8.2 and a second connecting shoulder 8.3, the connecting shoulders 8.2, 8.3 each having an external thread for connecting the spindle 8 to the rods 9.1, 9.2.
- a receiving shoulder 8.4 is provided between the spindle shoulder 8.1 and the first connecting shoulder 8.2, onto which the securing element 10 is pushed.
- the receiving shoulder 8.4 has a non-round geometry, which interacts with knurling 10.2 of the securing element 10, so that the securing element 10 is held on the receiving shoulder 8.4 in a twist-proof manner.
- the securing element 10 lies axially against the spindle shoulder 8.1, with the first rod 9.1 assembled linkage 7 also rests axially on the securing element 10, so that the securing element 10 is held axially between the spindle 8 and the first rod 9.1.
- the spindle 8 also has a tool shoulder 8.5, which is used to engage a tool when assembling the linkage 7 and has a corresponding tool geometry.
- the rods 9.1, 9.2 have shoulders with non-round geometries on the ends facing away from the spindle 8 for the non-rotatable connection of the rods 9.1, 9.2 to the forks 5.1, 5.2.
- FIG. 4 shows the spindle 8 with a securing element 10 arranged thereon in detail, with the spindle 8 being shown here without a tool shoulder 8.5.
- the securing element 10 is formed from a radially inner retaining element 10.3 and a radially outer sliding element 10.4.
- the holding element 10.3 is formed from a material with a high level of strength, so that there is a secure connection between the securing element 10 and the spindle 8.
- the sliding element 10.4 is made of a material with favorable sliding properties, so that there is a low coefficient of friction between the securing element 10 and an axial guide in the housing 2.
- the holding element 10.3 and the sliding element 10.4 are connected to one another in a rotationally fixed manner via knurling.
- the knurling between holding element 10.3 and sliding element 10.4 is interrupted in the axial direction by at least one radially extending tongue and groove connection, which in particular extends around the entire circumference of the lateral surfaces of holding element 10.3 and sliding element 10.4.
- the retaining element 10.3 and the sliding element 10.4 are held together in the axial direction by the tongue and groove connection.
- the spindle paragraph 8.1 and the first rod 9.1 then only hold the holding element 10.3 in the axial direction.
- the securing element 10 has a hexagonal geometry 10.5 on its inner lateral surface instead of knurling 10.2, via which it is held on the receiving shoulder 8.4 in a torsion-proof manner.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Power Steering Mechanism (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021125484.1A DE102021125484B4 (de) | 2021-10-01 | 2021-10-01 | Schubgestänge für einen Linearaktuator und Linearaktuator mit einem Schubgestänge |
| PCT/DE2022/100617 WO2023051860A1 (de) | 2021-10-01 | 2022-08-19 | Schubgestänge für einen linearaktuator und linearaktuator mit einem schubgestänge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4408723A1 true EP4408723A1 (de) | 2024-08-07 |
Family
ID=83691494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22789464.9A Pending EP4408723A1 (de) | 2021-10-01 | 2022-08-19 | Schubgestänge für einen linearaktuator und linearaktuator mit einem schubgestänge |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250121874A1 (de) |
| EP (1) | EP4408723A1 (de) |
| CN (1) | CN117881591A (de) |
| DE (1) | DE102021125484B4 (de) |
| WO (1) | WO2023051860A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230313869A1 (en) * | 2022-03-31 | 2023-10-05 | Steering Solutions Ip Holding Corporation | Anti-rotation device for vehicle steering system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2118813A1 (de) * | 1971-04-19 | 1972-11-02 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Lenkgetriebe |
| JP2001030930A (ja) * | 1999-07-23 | 2001-02-06 | Koyo Seiko Co Ltd | 舵取装置 |
| DE102006048614A1 (de) | 2006-10-13 | 2008-04-17 | Magna Powertrain Ag & Co Kg | Hinterradlenkungs-Aktuator |
| EP2981740A1 (de) * | 2013-04-03 | 2016-02-10 | Thomson Industries Inc. | Verdrehsichere vorrichtung für ein linearstellglied und linearstellglied damit |
| DE102016200102B4 (de) | 2016-01-07 | 2018-05-30 | Zf Friedrichshafen Ag | Aktuator, insbesondere für eine Hinterachslenkung eines Kraftfahrzeuges |
| DE102016200101A1 (de) | 2016-01-07 | 2017-07-13 | Zf Friedrichshafen Ag | Aktuator, insbesondere für die Hinterachslenkung eines Kraftfahrzeuges |
| DE102016206576B3 (de) | 2016-04-19 | 2017-10-12 | Zf Friedrichshafen Ag | Spindelantrieb und Aktuator mit Spindelantrieb |
| DE102016210227A1 (de) | 2016-06-09 | 2017-12-14 | Zf Friedrichshafen Ag | Aktuator für eine Hinterachslenkung |
| DE102016210221B4 (de) | 2016-06-09 | 2018-07-26 | Zf Friedrichshafen Ag | Aktuator mit einem Schublager für eine Spindel sowie Aktuator für eine Hinterachslenkung |
| KR102106287B1 (ko) * | 2018-09-04 | 2020-05-04 | 주식회사 만도 | 스티어 바이 와이어식 동력 보조 조향장치 |
-
2021
- 2021-10-01 DE DE102021125484.1A patent/DE102021125484B4/de active Active
-
2022
- 2022-08-19 EP EP22789464.9A patent/EP4408723A1/de active Pending
- 2022-08-19 WO PCT/DE2022/100617 patent/WO2023051860A1/de not_active Ceased
- 2022-08-19 CN CN202280051747.2A patent/CN117881591A/zh active Pending
- 2022-08-19 US US18/696,024 patent/US20250121874A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021125484B4 (de) | 2025-05-22 |
| CN117881591A (zh) | 2024-04-12 |
| US20250121874A1 (en) | 2025-04-17 |
| WO2023051860A1 (de) | 2023-04-06 |
| DE102021125484A1 (de) | 2023-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2019076595A1 (de) | Toleranzausgleichsanordnung | |
| DE102016213865B4 (de) | Antriebseinrichtung für einen Komfortantrieb eines Kraftfahrzeugs und Komfortantrieb | |
| EP2467289B1 (de) | Verstellbare lenksäule für ein kraftfahrzeug | |
| WO2012022310A2 (de) | Vorrichtung zum andrücken einer zahnstange | |
| EP2735088B1 (de) | Getriebe-antriebseinrichtung | |
| DE102012007329B4 (de) | Welle-Nabe-Verbindung | |
| WO2009046792A1 (de) | Kugelgewindetrieb mit angefedertem lager | |
| WO2015124466A1 (de) | Zahnstangenlenkung sowie endanschlag-dämpfungsbaugruppe für eine solche zahnstangenlenkung | |
| EP3573851B1 (de) | Gelenkgabel und aktuator mit gelenkgabel | |
| DE19945255A1 (de) | Radlagerung, insbesondere für nichtangetriebene Fahrzeugachsen | |
| EP4408723A1 (de) | Schubgestänge für einen linearaktuator und linearaktuator mit einem schubgestänge | |
| EP4043319B1 (de) | Lenksystem für ein kraftfahrzeug und verfahren zum montieren eines lenksystems für ein kraftfahrzeug | |
| DE102012103857A1 (de) | Vorrichtung zum Andrücken einer Schnecke oder eines Schraubritzels an ein Schneckenrad oder an ein Schraubrad | |
| WO2015172968A1 (de) | Vorrichtung zum sichern eines spannelements gegen ungewolltes lösen | |
| DE102010024619B4 (de) | Vorgespanntes Differentialgetriebe ohne Zahnflankenwechsel | |
| DE102012013964B4 (de) | Vorrichtung zum Andrücken einer Zahnstange an ein Ritzel | |
| DE19643798A1 (de) | Klemmvorrichtung für eine verstellbare Lenksäule | |
| WO2018001726A1 (de) | Achsenend-baugruppe mit einer radnabeneinheit und einer radbremse | |
| EP2276653B1 (de) | Scheibenwischervorrichtung | |
| EP1493648A2 (de) | Lenkvorrichtung für ein Kraftfahrzeug | |
| DE102019200858B4 (de) | Spindelantrieb einer steer-by-wire-Lenkung für ein Kraftfahrzeug, Aktuator mit einem Spindelantrieb sowie steer-by-wire-Lenkung für ein Kraftfahrzeug | |
| DE102017214320B4 (de) | Aktuator einer Hinterachslenkung für ein Kraftfahrzeug | |
| DE102018115937B4 (de) | Lenkradeinheit zur Erfassung einer Lenkbewegung eines Lenkrades für ein elektromechanisches Lenksystem | |
| EP2447559A2 (de) | Axial gesicherte Welle-Nabe-Verbindung | |
| DE10231746A1 (de) | Getriebe-Antriebseinheit mit einem Adapter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20240502 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20251223 |