EP1610997A1 - Dispositif de serrage pour bloquer la position d'une colonne de direction - Google Patents

Dispositif de serrage pour bloquer la position d'une colonne de direction

Info

Publication number
EP1610997A1
EP1610997A1 EP04716585A EP04716585A EP1610997A1 EP 1610997 A1 EP1610997 A1 EP 1610997A1 EP 04716585 A EP04716585 A EP 04716585A EP 04716585 A EP04716585 A EP 04716585A EP 1610997 A1 EP1610997 A1 EP 1610997A1
Authority
EP
European Patent Office
Prior art keywords
clamping
ramp
guide cage
steering column
ramps
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.)
Withdrawn
Application number
EP04716585A
Other languages
German (de)
English (en)
Inventor
Harald Hochmuth
Bernhard Wiesneth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler KG
Schaeffler 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 INA Schaeffler KG, Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1610997A1 publication Critical patent/EP1610997A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/16—Steering columns
    • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
    • B62D1/184—Mechanisms for locking columns at selected positions

Definitions

  • Oemrr device for fixing the position of a steering column
  • the invention relates to a clamping device for fixing the position of a vehicle steering column which is adjustable in length and / or inclination, which is guided in the support arms of a stationary console and comprises a tension bolt which extends at right angles to the steering column between the support arms, with a tension ramp provided on the tension bolt Ramp disc is arranged coaxially, the clamping ramps each have a contour that changes continuously in the circumferential direction from a release position to a clamping position, and rolling elements are supported on the clamping ramps in the clamping direction of the ramp disc, which are guided on a guide cage rotatably arranged on the draw bolt, which can be rotated by means of a manually operated hand lever, the support arms approaching one another when the guide cage rotates in one direction of rotation for clamping the steering column and in the other direction of rotation for releasing the steering column.
  • the invention has for its object to provide a clamping device in which there is always rolling friction of the rolling elements during actuation, so that only small actuation forces are present. This enables a greater preload of the overall system and thus a higher clamping force, which at the same time means that the holding force of the system is increased. Furthermore, this rolling system is intended to save the thrust bearing previously used for reducing the actuating force.
  • the unit according to the invention should have variable interfaces for connection to the steering column and for lever adaptation so that it can be used multiple times.
  • a further ramp disk which is provided with clamping ramps and is arranged in the opposite direction to the first ramp disk, is arranged coaxially on the tension bolt, on the clamping ramps of which the rolling elements are also supported, with the corresponding clamping ramps of the two for each rolling body Ramp disks have the same geometric shape.
  • a lever adapter in which the hand lever is inserted and locked, can be rotatably arranged on the draw bolt.
  • the lever adapter can be a plastic part. It can have a propeller-like geometry with pins that are axially parallel to the draw bolt, with which it engages in a form-fitting manner in the adjacent first ramp disk and is immersed in a receiving geometry of the guide cage, the pins being extended in the direction of the further ramp disk.
  • a radial groove can be arranged in the guide cage, in which there is a detent ball and a helical compression spring acting on it.
  • a pin of the lever adapter located in the area of the receiving geometry of the guide cage can have a rounded end with which it rests on the side of the locking ball facing away from the helical compression spring.
  • the guide box fig can have radial rims with which it positively engages in corresponding recesses in the further ramp disk.
  • the clamping device according to the invention is a unit which has internal stops which simultaneously act as a detent. This ensures that the system is secured against unintentional opening or closing. Due to the internal arrangement of the stops, such a system is protected against damage when mounted on an assembly. When running as a closed system, e.g. B. Dust and dirt do not impair its function.
  • Figure 1 is an exploded perspective view of parts of a clamping device according to the invention
  • Figure 2 is a perspective view of a draw bolt and a lever adapter with an assembled guide cage according to the invention with ramp disks, partially cut away;
  • FIG. 3 shows the ramp disks with a rolling element arranged between them, but without a guide cage, in a first position, in section;
  • Figure 4 shows the ramp disks according to Figure 3 in a second position, in section
  • FIG. 5 shows a known clamping device according to the prior art, in section. Detailed description of the drawing
  • a previously known clamping device shown in FIG. 5 comprises a pot-shaped housing 2 made of sheet steel without cutting, which encloses all gill means.
  • the housing is supported by a base 3 on a support arm 4 which, together with a further support arm 5 arranged in parallel, serves as a bracket for holding a steering column 6.
  • a rotation lock 21 is provided between these components to fix the position of the housing on the support arm 4.
  • the clamping device 1 a is arranged on a draw bolt 7, which, connecting the support arms 4, 5, is simultaneously guided through a transverse opening in the steering column 6. At one end, the tension bolt 7 is supported on the support arm 5 by means of a stop 8.
  • the further end of the tension bolt 7 protruding beyond the clamping device 1 a is provided with a thread on which a fastening nut 9 is arranged.
  • a disc spring 10 bears against this, which on the other hand is supported on an axial disk 11a, which closes the end face of the housing 2.
  • the plate spring 10 can be omitted if, for example, the springs of the internal stress of the support arms 4, 5 in the longitudinal direction of the draw bolt 7 are sufficient to release the spreading dimension when the clamping device is released, in order to enable an adjustment of the steering column 6.
  • an inward-facing locking device 20 is provided at the end of the housing 2.
  • a clamping disk 12a which is provided with clamping ramps 13a and on which rolling elements 14a are supported, serves as the clamping means of the clamping device 1a.
  • An anti-rotation device 28 is provided between the clamping disk 12a and the base 3.
  • the rolling elements 14a which are arranged in a circumferentially distributed manner and are inserted in a holding disk 15a, are supported on the one hand on the clamping disk 12a and on the other hand on a running disk 16a.
  • the clamping device 1a comprises an axial bearing 17a, which is arranged between the running disk 16a and the axial disk 11a.
  • the holding disc 15a which is rotatably arranged on the tension bolt 7, is in one piece with an in order to achieve an exact guidance or avoidance of an angular movement occurring with respect to the longitudinal axis of the tension bolt 7
  • the clamping device 1 a serves the purpose of being able to continuously adjust the steering column 6 arranged between the support arms 4 and 5, both in inclination and in length.
  • the adjustment is made possible by turning the holding disc 15a.
  • a hand lever 19 is used, which is guided through a radial opening in the housing 2 and is connected in one piece to the holding disc 15a.
  • a housing wall 24 is provided to limit the pivoting range of the hand lever 19.
  • the steering column 6 is shown in the clamping position.
  • a rotation of the holding disc 15a is required, which causes an axial displacement of the rolling elements 14a in the direction of the arrow on the clamping ramp 13a.
  • the non-positively engaging components on the rolling elements 14a such as the running disc 16a, the axial bearing 17a and the axial disc 11a, are displaced, supported by the spring force of the plate spring 10. Due to the changing, ie. H. reducing the amount of spread, the preload exerted by the plate spring 10 on the gill means of the clamping device 1 a is reduced, as a result of which the support arms 4, 5 inserted under preload axially move away from one another, thereby establishing a release position of the steering column 6. To clamp the steering column 6, it is necessary to turn the holding disc 15 in the opposite direction of rotation by means of a hand lever 19, so that a maximum spreading dimension of the clamping means is achieved.
  • a clamping device as shown in FIGS. 1 to 4, has a draw bolt 30, on which, in addition to a guide cage 31 for rolling elements 32 and a first ramp disk 33, a further ramp disk 34 is arranged such that the guide cage 31 is located between the two Ramp disks and the rolling elements 32 are supported both on clamping ramps 35 of the first ramp disk 33 and on clamping ramps 36 of the further ramp disk 34.
  • three rolling elements 32 designed as rollers are used, which are arranged one behind the other in the circumferential direction in the guide cage 31, each at 120 ° to one another sets, are arranged.
  • balls can also be used as rolling elements.
  • the clamping ramps 35 and 36 must be identical in their geometry and arranged in opposite directions when installed be, as shown in Figures 3 and 4.
  • the rolling elements 32 tip over corner edges, which are shown as ramp rising points 37 and 38, and each rolling element 32 with the diameter d rotates, as a result of which there is rolling friction and therefore a lower actuating force F is required, than for sliding friction of the rolling elements 32.
  • the actuating force should not increase.
  • the ramp geometry is therefore selected as follows: From the base of the ramp, the clamping ramp 35 or 36 rises steeply, since in this position the system has little force, ie the steep ramp increase does not yet have a strong influence on the actuating force. After each rolling element has overcome the steep rise, a higher preload acts in the system due to the stroke performed.
  • the ramp contour now changes into a flat ramp section, which has a value of 0 ° to the end of the ramp shown in Figure 4, the inclination of the respective clamp ramp 35 and 36 relative to the horizontal characteristic angle ⁇ .
  • the conditions of the force relationships on the clamping ramps 35 and 36 can be seen in FIGS. 3 and 4.
  • the actuating force F generates a clamping force Fi at the ramp rise point 37 or 38.
  • the ramp rise point 37 or 38 is offset by the lever arm fi for rolling friction with respect to the vertical center line of the rolling element 32, which here lies against a concave section of the clamping ramp 35 or 36.
  • F R roll
  • ⁇ f is the rolling resistance number. Due to the increasing tension in the system, a force F N occurs, the line of action of which extends normally to the respective clamping ramp 35 or 38. It causes the rolling resistance F w , which results from the force F N by multiplication by the coefficient of friction. By implementing the rolling adjustment, the axial bearing previously required can be omitted and costs can thus be saved.
  • the clamping device has a lever adapter 40 which is arranged on the draw bolt 30 and can be made of a plastic. Any hand lever, for example the hand lever 39 shown in FIG. 1, can be inserted into the lever adapter 40 and locked there.
  • the lever adapter 40 engages with a propeller-like geometry with radial pins 41 in a form-fitting manner in the first ramp disk 33.
  • the pins 41 immerse in a receiving geometry 42 of the guide cage 31 and are extended in the direction of the further ramp disk 34.
  • the guide cage 31 is positively connected to the first ramp disk 33 in order to absorb stop forces. to be able to take.
  • the likewise designed propeller-like receiving geometry 42 of the guide cage 31 has boundary walls which act as end stops 43 and 44 for the pin 41.
  • the pin 41 abuts either on the end stop 43 or on the end stop 44 within the receiving geometry 42 of the guide cage 31.
  • a locking function is integrated in the guide cage 31.
  • a radial groove 45 extending from the receiving geometry 42 is arranged, in which a helical compression spring 46 and a detent ball 47 are inserted.
  • a locking device is thus formed together with a rounded end 48 of the pin 41 of the lever adapter 40.
  • at least one rounded end 48 of a pin 41 snaps past the locking ball 47 preloaded by the screw compression spring 46.
  • the cogging torque can be set depending on the spring preload and the number of cogging elements. The principle of operation is similar to that of a circuit lock.
  • a closed unit is formed by the arrangement in the guide cage 31.
  • the guide cage 31 is provided with radial rims 49 which engage in corresponding recesses in the further ramp disk 34. This creates a closed system with a nested structure.
  • the further ramp disc 34 has cams 50, which serve as positive locking of the lamella disc of the clamping device relative to the steering column holder.
  • the cams 50 are located in a guide, which are arranged tangentially to the pivot point of the adjustable part of the steering column.
  • the lamella disc can be moved along the guide and still remains fixed about the axis of rotation of the hand lever 39.
  • Support arm 41 pins
  • Support arm 42 receiving geometry
  • Rolling element first ramp disc further ramp disc clamping ramp clamping ramp ramp rise point

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Controls (AREA)

Abstract

L'invention concerne un dispositif de serrage servant à bloquer la position d'une colonne de direction de véhicule réglable qui est guidée dans des bras supports d'une console fixe et qui comprend un boulon d'assemblage (30) sur lequel est disposé coaxialement un disque à rampes (33) pourvu de rampes de serrage, lesquelles présentent chacune un contour qui varie dans le sens circonférentiel de façon continue d'une position de desserrage à une position de serrage. Des éléments de roulement (32) prennent appui sur les rampes de serrage dans le sens de serrage du disque à rampes (33), ces éléments étant guidés dans une cage de guidage (31) disposée rotative sur le boulon d'assemblage (30). Selon l'invention, un deuxième disque à rampes (34) pourvu de rampes de serrage et disposé en sens contraire par rapport au premier disque à rampes (33) est placé coaxialement sur le boulon d'assemblage (30), les éléments de roulement (32) prenant également appui sur les rampes de serrage de ce deuxième disque. Pour chaque élément de roulement (32), les rampes de serrage des deux disques à rampes (33, 34) qui sont associées à cet élément de roulement présentent le même profil géométrique.
EP04716585A 2003-04-09 2004-03-03 Dispositif de serrage pour bloquer la position d'une colonne de direction Withdrawn EP1610997A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003116190 DE10316190A1 (de) 2003-04-09 2003-04-09 Klemmvorrichtung zur Lagefixierung einer Lenksäule
PCT/EP2004/002103 WO2004089722A1 (fr) 2003-04-09 2004-03-03 Dispositif de serrage pour bloquer la position d'une colonne de direction

Publications (1)

Publication Number Publication Date
EP1610997A1 true EP1610997A1 (fr) 2006-01-04

Family

ID=33038956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04716585A Withdrawn EP1610997A1 (fr) 2003-04-09 2004-03-03 Dispositif de serrage pour bloquer la position d'une colonne de direction

Country Status (3)

Country Link
EP (1) EP1610997A1 (fr)
DE (1) DE10316190A1 (fr)
WO (1) WO2004089722A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005002620A1 (de) * 2005-01-20 2006-08-03 Schaeffler Kg Klemmvorrichtung, insbesondere für eine Lenksäule
DE102005031594A1 (de) * 2005-07-06 2007-01-11 Schaeffler Kg Klemmvorrichtung für eine Lenksäule
GB0525850D0 (en) 2005-09-01 2006-02-01 Trw Lucasvarity Electric Steer A Steering Column Assembly
WO2007026118A2 (fr) * 2005-09-01 2007-03-08 Trw Limited Ensemble colonne de direction
US7878543B2 (en) 2008-02-25 2011-02-01 Nexteer (Beijing) Technology Co., Ltd. Ball ramp clamping mechanism
DE102008029247A1 (de) 2008-06-19 2009-12-24 Schaeffler Kg Klemmvorrichtung zur Lagefixierung einer verstellbaren Fahrzeuglenksäule
DE102009052823A1 (de) 2009-11-13 2011-05-19 Lemo Maschinenbau Gmbh Verfahren zum Positionieren von einem Stempel zu einer Matrize einer Stanzvorrichtung
GB201110277D0 (en) 2011-06-17 2011-08-03 Trw Ltd A clamp assembly for a steering column assembly
JP6103303B2 (ja) * 2013-07-05 2017-03-29 株式会社ジェイテクト ステアリング装置
DE202016104513U1 (de) * 2016-08-16 2017-11-17 Rollax Gmbh & Co. Kg Klemmvorrichtung für eine Lenksäulenbaugruppe
US11498604B2 (en) * 2020-03-10 2022-11-15 Kubota Corporation Work vehicle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654058B1 (fr) * 1989-11-09 1992-02-21 Ecia Equip Composants Ind Auto Dispositif de maintien d'un organe tubulaire en particulier d'une colonne de direction de vehicule automobile.
US5301567A (en) * 1992-09-23 1994-04-12 Chrysler Corporation Low pivot tilt steering column clamping mechanism
FR2696403B1 (fr) * 1992-10-06 1995-01-06 Ecia Equip Composants Ind Auto Dispositif de blocage en position d'une colonne de direction réglable par exemple de véhicule automobile et ensemble de colonne comportant un tel dispositif.
DE9300387U1 (fr) * 1993-01-14 1993-03-11 Lemfoerder Metallwaren Ag, 2844 Lemfoerde, De
DE19640196C1 (de) * 1996-09-30 1998-04-23 Schaeffler Waelzlager Ohg Klemmvorrichtung für eine Lenksäule
US5941129A (en) * 1997-07-21 1999-08-24 General Motors Corporation Clamp for motor vehicle steering column
EP1180466B1 (fr) * 2000-08-11 2005-02-09 Koyo Seiko Co., Ltd. Appareil de direction à inclinaison réglable
US7010996B2 (en) * 2002-03-08 2006-03-14 Timken Us Corporation Steering column clamping device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004089722A1 *

Also Published As

Publication number Publication date
WO2004089722A1 (fr) 2004-10-21
DE10316190A1 (de) 2004-10-28

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