US20010026730A1 - Device for the detachable fastening of a steering wheel on a steering shaft - Google Patents

Device for the detachable fastening of a steering wheel on a steering shaft Download PDF

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Publication number
US20010026730A1
US20010026730A1 US09/785,725 US78572501A US2001026730A1 US 20010026730 A1 US20010026730 A1 US 20010026730A1 US 78572501 A US78572501 A US 78572501A US 2001026730 A1 US2001026730 A1 US 2001026730A1
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US
United States
Prior art keywords
nut
bolt
bore
steering shaft
shaft
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.)
Granted
Application number
US09/785,725
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US6454486B2 (en
Inventor
Martin Kreuzer
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.)
ZF Automotive Safety Systems Germany GmbH
Original Assignee
TRW Automotive Safety Systems GmbH
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 TRW Automotive Safety Systems GmbH filed Critical TRW Automotive Safety Systems GmbH
Assigned to TRW AUTOMOTIVE SAFE SYSTEMS GMBH & CO. KG reassignment TRW AUTOMOTIVE SAFE SYSTEMS GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KREUZER, MARTIN
Publication of US20010026730A1 publication Critical patent/US20010026730A1/en
Application granted granted Critical
Publication of US6454486B2 publication Critical patent/US6454486B2/en
Adjusted expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B62D1/04—Hand wheels
    • B62D1/10—Hubs; Connecting hubs to steering columns, e.g. adjustable
    • 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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0894—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with other than axial keys, e.g. diametral pins, cotter pins and no other radial clamping
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7018—Interfitted members including separably interposed key
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7062—Clamped members
    • Y10T403/7064—Clamped members by wedge or cam
    • Y10T403/7066—Clamped members by wedge or cam having actuator
    • Y10T403/7067—Threaded actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7075—Interfitted members including discrete retainer
    • Y10T403/7077—Interfitted members including discrete retainer for telescoping members
    • Y10T403/7079—Transverse pin
    • Y10T403/7084—Bolt, rivet, or screw
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20732—Handles
    • Y10T74/20834—Hand wheels

Definitions

  • the invention relates to a device for the detachable fastening of a steering wheel on a steering shaft.
  • a device for the detachable fastening of a steering wheel on a steering shaft having an axis The steering wheel has a hub provided with a through-bore arranged perpendicularly to the axis of the steering shaft and the through-bore intersects a groove arranged in the steering shaft.
  • the device comprises a fastening means arranged in the through-bore.
  • the fastening means has a bolt with a head and a shaft provided at least partially with an external thread and has a nut able to be screwed onto the shaft of the bolt.
  • the nut is able to engage into the groove and the through-bore has two oppositely directed radial support surfaces arranged between the bolt head and the nut.
  • a spring element is provided which engages one of the bolt and the nut and exerts a force onto one of the bolt and the nut.
  • the force tries to increase, i.e. aims for an increase of a distance between the bolt head and the nut.
  • the fastening means consisting of bolt and nut forms a nut and bolt connection.
  • the spring element On tightening of the nut and bolt connection, the spring element is compressed and pre-stressed.
  • the energy stored in the spring provides for the bolt head and nut to be pressed apart and for the nut to leave the engagement with the groove, so that the steering wheel can be simply removed from the steering shaft.
  • the spring element is arranged between the support surface on the nut side and the nut. In this way, it is ensured that on detachment of the nut and bolt connection the nut moves outwards to the end of the through-bore on the nut side and no longer engages into the groove of the steering shaft.
  • the spring element is arranged between the support surface on the bolt head side and the bolt head. In this way, the bolt can be easily removed after the detachment of the nut and bolt connection.
  • the end of the through-bore on the nut side is secured against the nut falling out, e.g. by caulking.
  • the single FIGURE shows a device according to the invention.
  • the device shown is used for the detachable fastening of a steering wheel on a steering shaft 10 , the steering wheel having a hub 30 which is provided with a through-bore 20 .
  • This through-bore 20 intersects a groove 40 formed in the steering shaft.
  • a constriction is constructed, which forms two radial support faces 110 and 120 .
  • An essential component of the device is a fastening means 50 .
  • This fastening means 50 has a bolt 60 with a bolt head 70 and also a shaft 90 , which is provided at least partially with an external thread 80 , and has a nut 100 which is able to be screwed onto the shaft 90 and is arranged in the through-bore 20 such that the bolt head 70 and the nut 100 are separated from each other by the radial support surfaces 110 and 120 .
  • the support surface 110 here faces the bolt head 70 and the support surface 120 faces the nut 100 .
  • the nut 100 is provided with an internal thread and has at its end facing the support surface 120 on the nut side a preferably conical chamfer 102 which is constructed such that it can engage into the groove 40 of the steering shaft 10 .
  • a guide is provided for the nut 100 in order to secure it against rotation in the through-bore 20 and to prevent a co-rotation of the nut with the bolt movement during a screwing procedure.
  • a spring element 130 is arranged, preferably a spiral spring. Between the support surface 110 on the bolt head side and the bolt head 70 , a washer can be provided.
  • the end of the through-bore 20 on the nut side is secured by suitable means, e.g. by caulking 140 .
  • the steering wheel is placed onto the steering shaft.
  • Serrations (not illustrated) in hub and steering shaft provide for a torque transmission between the steering wheel and the steering shaft.
  • the nut 100 is only screwed onto the shaft 90 so far that the spring element 130 holds the nut 100 by elastic force in a position close to the opening 150 of the through-bore 20 on the nut side, so that the nut 100 does not prevent the placing of the steering wheel 30 onto the steering shaft 10 .
  • the conical chamfer 102 of the nut 100 does not engage into the groove 40 of the steering shaft 10 .
  • the nut 100 is moved along its guide toward the support surface 120 and in so doing arrives in engagement with the groove 40 and via the conical chamfer 102 locks the hub 30 of the steering wheel with the steering shaft 10 .
  • the support surfaces 110 and 120 provide for the nut to assume a defined position with respect to the groove 40 .
  • the spring element 130 is compressed and prestressed by the movement of the nut 100 in the direction of the support surface 120 .
  • the nut and bolt connection 50 is detached, in turn by rotating of the bolt head 70 .
  • the spring element 130 gradually relaxes and moves the nut 100 from the support surface 120 away toward the opening 150 on the nut side with the bolt head 70 as before lying against the support surface 110 . In this way, the engagement of the nut 100 with the groove 70 is reliably released and the steering wheel can be lifted from the steering shaft.

Landscapes

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

Abstract

The invention relates to a device for the detachable fastening of a steering wheel on a steering shaft having an axis. The steering wheel has a hub provided with a through-bore arranged perpendicularly to the axis of the steering shaft and the through-bore intersects a groove arranged in the steering shaft. The device comprises a fastening means arranged in the through-bore. The fastening means has a bolt with a head and a shaft provided at least partially with an external thread and has a nut able to be screwed onto the shaft of the bolt. The nut is able to engage into the groove and the through-bore has two oppositely directed radial support surfaces arranged between the bolt head and the nut. One support surface is arranged on the bolt head side and the other support surface is arranged on the nut side. A spring element is provided which engages one of the bolt and the nut and exerts a force onto one of the bolt and the nut. The force aims for an increase of a distance between the bolt head and the nut.

Description

    TECHNICAL FIELD
  • The invention relates to a device for the detachable fastening of a steering wheel on a steering shaft. [0001]
    • BACKGROUND OF THE INVENTION
  • The use of steering wheels provided with gas bags in automobiles requires new techniques for the installation of the steering wheel on the steering shaft, because the interior of the steering wheel is no longer accessible from above. [0002]
  • It is known for example from the DE 41 06 096, to provide the steering shaft with a groove and to provide the hub with a through-bore which intersects this groove, and in this through-bore to arrange a fastening means consisting of a bolt and a nut screwed onto this bolt, a part of the bolt and/or of the nut engaging into the groove of the steering shaft on tightening of the nut and bolt connection and in this way locking the hub and the steering shaft with each other. As also in the use of nuts screwed from above onto the steering shaft, the torques occurring during traveling are transferred via force-fitting serrations in the steering shaft and the hub. [0003]
    • BRIEF SUMMARY OF THE INVENTION
  • In order to be able to separate the steering wheel from the steering shaft without difficulty, for example for changing the steering wheel or the gas bag module, it is necessary that the nut and bolt connection can be detached simply and reliably. [0004]
  • This is achieved in a device for the detachable fastening of a steering wheel on a steering shaft having an axis. The steering wheel has a hub provided with a through-bore arranged perpendicularly to the axis of the steering shaft and the through-bore intersects a groove arranged in the steering shaft. The device comprises a fastening means arranged in the through-bore. The fastening means has a bolt with a head and a shaft provided at least partially with an external thread and has a nut able to be screwed onto the shaft of the bolt. The nut is able to engage into the groove and the through-bore has two oppositely directed radial support surfaces arranged between the bolt head and the nut. One support surface is arranged on the bolt head side and the other support surface is arranged on the nut side. A spring element is provided which engages one of the bolt and the nut and exerts a force onto one of the bolt and the nut. The force tries to increase, i.e. aims for an increase of a distance between the bolt head and the nut. The fastening means consisting of bolt and nut forms a nut and bolt connection. On tightening of the nut and bolt connection, the spring element is compressed and pre-stressed. On detaching of the nut and bolt connection, the energy stored in the spring provides for the bolt head and nut to be pressed apart and for the nut to leave the engagement with the groove, so that the steering wheel can be simply removed from the steering shaft. [0005]
  • In a preferred embodiment of the invention, the spring element is arranged between the support surface on the nut side and the nut. In this way, it is ensured that on detachment of the nut and bolt connection the nut moves outwards to the end of the through-bore on the nut side and no longer engages into the groove of the steering shaft. [0006]
  • In a further preferred embodiment of the invention, the spring element is arranged between the support surface on the bolt head side and the bolt head. In this way, the bolt can be easily removed after the detachment of the nut and bolt connection. [0007]
  • It is necessary to secure the nut against rotation in the through-bore, in order to avoid a co-rotation of the nut with the bolt during the tightening movement or during the detachment of the connection. [0008]
  • Advantageously the end of the through-bore on the nut side is secured against the nut falling out, e.g. by caulking.[0009]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The single FIGURE shows a device according to the invention.[0010]
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • The device shown is used for the detachable fastening of a steering wheel on a [0011] steering shaft 10, the steering wheel having a hub 30 which is provided with a through-bore 20. This through-bore 20 intersects a groove 40 formed in the steering shaft. In the through-bore 20 a constriction is constructed, which forms two radial support faces 110 and 120.
  • An essential component of the device is a fastening means [0012] 50. This fastening means 50 has a bolt 60 with a bolt head 70 and also a shaft 90, which is provided at least partially with an external thread 80, and has a nut 100 which is able to be screwed onto the shaft 90 and is arranged in the through-bore 20 such that the bolt head 70 and the nut 100 are separated from each other by the radial support surfaces 110 and 120. The support surface 110 here faces the bolt head 70 and the support surface 120 faces the nut 100. The nut 100 is provided with an internal thread and has at its end facing the support surface 120 on the nut side a preferably conical chamfer 102 which is constructed such that it can engage into the groove 40 of the steering shaft 10.
  • In the through-bore [0013] 20 a guide is provided for the nut 100 in order to secure it against rotation in the through-bore 20 and to prevent a co-rotation of the nut with the bolt movement during a screwing procedure.
  • Between the [0014] nut 100 and the support surface 120 on the nut side a spring element 130 is arranged, preferably a spiral spring. Between the support surface 110 on the bolt head side and the bolt head 70, a washer can be provided.
  • In order to prevent the [0015] nut 100 from falling out from the through-bore 20 with a detached nut and bolt connection 50, the end of the through-bore 20 on the nut side is secured by suitable means, e.g. by caulking 140.
  • To connect the steering wheel with the steering shaft, with a detached nut and [0016] bolt connection 50, the steering wheel is placed onto the steering shaft. Serrations (not illustrated) in hub and steering shaft provide for a torque transmission between the steering wheel and the steering shaft. The nut 100 is only screwed onto the shaft 90 so far that the spring element 130 holds the nut 100 by elastic force in a position close to the opening 150 of the through-bore 20 on the nut side, so that the nut 100 does not prevent the placing of the steering wheel 30 onto the steering shaft 10.
  • After placing the steering wheel onto the steering shaft, therefore firstly the [0017] conical chamfer 102 of the nut 100 does not engage into the groove 40 of the steering shaft 10. By a tightening of the nut and bolt connection by rotation of the bolt head 70, the nut 100 is moved along its guide toward the support surface 120 and in so doing arrives in engagement with the groove 40 and via the conical chamfer 102 locks the hub 30 of the steering wheel with the steering shaft 10. The support surfaces 110 and 120 provide for the nut to assume a defined position with respect to the groove 40. After the tightening of the nut and bolt connection 50, the steering wheel is secured on the steering shaft.
  • The [0018] spring element 130 is compressed and prestressed by the movement of the nut 100 in the direction of the support surface 120.
  • To detach the connection between the [0019] hub 30 of the steering wheel and the steering shaft 10, the nut and bolt connection 50 is detached, in turn by rotating of the bolt head 70. The spring element 130 gradually relaxes and moves the nut 100 from the support surface 120 away toward the opening 150 on the nut side with the bolt head 70 as before lying against the support surface 110. In this way, the engagement of the nut 100 with the groove 70 is reliably released and the steering wheel can be lifted from the steering shaft.

Claims (6)

1. A device for the detachable fastening of a steering wheel on a steering shaft having an axis, said steering wheel having a hub provided with a through-bore arranged perpendicularly to said axis of said steering shaft, and said through-bore intersecting a groove arranged in said steering shaft, said device comprising a fastening means arranged in said through-bore, said fastening means having a bolt with a head and a shaft provided at least partially with an external thread and having a nut able to be screwed onto said shaft of said bolt, said nut being able to engage into said groove, said through-bore having two oppositely directed radial support surfaces arranged between said bolt head and said nut, one support surface being arranged on the bolt head side and said other support surface being arranged on the nut side, and a spring element being provided which engages one of said bolt and said nut and exerts a force onto one of said bolt and said nut, said force aiming for an increase of a distance between said bolt head and said nut.
2. The device according to
claim 1
, wherein said spring element is arranged between said support surface on said nut side and said nut and exerts a force onto said nut in a direction of said bolt head toward said nut.
3. The device according to
claim 1
, wherein said spring element is arranged between said support surface on said bolt head side and said bolt head.
4. The device according to
claim 1
, wherein said nut is secured against rotation in said through-bore.
5. The device according to
claim 1
, wherein said end of said through-bore on said nut side is secured against said nut falling out.
6. The device according to
claim 1
, wherein said nut has a conical chamfer with which it engages into said groove.
US09/785,725 2000-03-30 2001-02-16 Device for the detachable fastening of a steering wheel on a steering shaft Expired - Fee Related US6454486B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20005884 2000-03-30
DE20005884U DE20005884U1 (en) 2000-03-30 2000-03-30 Device for releasably attaching a steering wheel to a steering shaft
DE20005884.3 2000-03-30

Publications (2)

Publication Number Publication Date
US20010026730A1 true US20010026730A1 (en) 2001-10-04
US6454486B2 US6454486B2 (en) 2002-09-24

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US09/785,725 Expired - Fee Related US6454486B2 (en) 2000-03-30 2001-02-16 Device for the detachable fastening of a steering wheel on a steering shaft

Country Status (4)

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US (1) US6454486B2 (en)
EP (1) EP1138575B1 (en)
DE (2) DE20005884U1 (en)
ES (1) ES2256094T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2518870A (en) * 2013-10-03 2015-04-08 Broadland Design And Engineering 2008 Ltd Steering wheel mounting

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ES2240277T3 (en) 2000-06-14 2005-10-16 Trw Automotive Safety Systems Gmbh FIXING FOR VEHICLE WHEEL.
US6688645B2 (en) * 2002-03-28 2004-02-10 Visteon Global Technologies, Inc. Turn-limited column assembly
US6676328B2 (en) * 2002-05-14 2004-01-13 Shyh-Jen Wang Simplified fastening means
DE102006010228B3 (en) 2006-03-02 2007-11-22 Thyssenkrupp Presta Ag Method for producing a steering spindle part
DE102009038316A1 (en) 2009-08-21 2011-02-24 Thyssenkrupp Presta Ag Method for producing a steering spindle part forming a section of a steering spindle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2518870A (en) * 2013-10-03 2015-04-08 Broadland Design And Engineering 2008 Ltd Steering wheel mounting
GB2518870B (en) * 2013-10-03 2020-02-12 Broadland Design And Engineering 2008 Ltd Steering wheel mounting

Also Published As

Publication number Publication date
DE20005884U1 (en) 2000-08-10
EP1138575A2 (en) 2001-10-04
DE50108501D1 (en) 2006-02-02
ES2256094T3 (en) 2006-07-16
EP1138575B1 (en) 2005-12-28
EP1138575A3 (en) 2004-03-24
US6454486B2 (en) 2002-09-24

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