How does a tiltable steering column work

EP0555627A1 - Pivoting mechanism for the steering wheel assembly of a vehicle - Google Patents

Swivel mechanism for the steering wheel arrangement of a vehicle Download PDF

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Publication number
EP0555627A1
EP0555627A1EP19930100038EP93100038AEP0555627A1EP 0555627 A1EP0555627 A1EP 0555627A1EP 19930100038 EP19930100038 EP 19930100038EP 93100038 AEP93100038 AEP 93100038AEP 0555627 A1EP0555627 A1EP 0555627 A1EP0555627 A11
Authority
EP
European Patent Office
Prior art keywords
steering column
segment
swivel
locking
pawl
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
EP19930100038
Other languages
English (en)
French (fr)
Other versions
EP0555627B1 (de
Inventor
David Joseph Easton
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.)
Deere and Co
Original assignee
Deere and Co
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
Priority to US820465priorityCritical
Priority to US07 / 820,465 priority patent / US5168768A / en
Application filed by Deere and CofiledCriticalDeere and Co
Publication of EP0555627A1publicationCriticalpatent / EP0555627A1 / de
Application granted granted Critical
Publication of EP0555627B1publicationCriticalpatent / EP0555627B1 / de
Anticipated expirationlegal-statusCritical
Expired - Lifetimelegal-statusCriticalCurrent

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  • 210000003467CheekAnatomy0.000claimsdescription15
  • 230000000875correspondingEffects0.000abstractdescription4
  • 238000010276constructionMethods0.000abstractdescription2
  • 230000018109developmental processEffects0.000description2
  • 230000000994depressedEffects0.000description1

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Classifications

    • B — PERFORMING OPERATIONS; TRANSPORTING
    • B62 — LAND VEHICLES FOR TRAVELING 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
    • 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 / 20636-Detents
    • 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 / 20636-Detents
    • Y10T74 / 20672 — Lever engaging rack
    • Y10T74 / 20684-Lever carried pawl

Abstract

Description

  • The invention relates to a swivel mechanism for the steering wheel arrangement of a vehicle according to the features of the preamble of claim 1.
  • By means of this pivoting mechanism, an upper steering column part can be pivoted about a horizontal axis of rotation with respect to a lower steering column part fixed to the vehicle, so that the vehicle driver can set a comfortable steering column position. To lock the steering column in the desired position, a locking device is provided which comprises a segment part coupled to the lower steering column part with a toothing and a pawl coupled to the upper steering column part which can be manually engaged with this toothing. By actuating the pawl, it can be moved towards and away from the toothing of the segment part in order to fix the upper steering column part optionally in different pivoting positions relative to the segment part. Furthermore, a memory function is provided which enables the steering column to be swiveled far up to make it easier to get into the vehicle, and then to swivel it back into the selected locking position. It is not necessary here for the operator to select and set a comfortable locking position again.
  • A number of pivot mechanisms are known, but most of them are complex in construction and include parts that protrude from the steering column and therefore make the steering column assembly bulky. For example, US-A-4,938,093 describes a steering column arrangement with a memory function which, however, protrudes relatively far above the steering column and requires a large number of parts. The pivotable steering column arrangement which emerges from US-A-4,993,279 has a somewhat simpler structure, but has no memory function. US-A-4,527,444 describes an arrangement in which an instrument panel can be pivoted with the steering column, which only allows the setting of an angle of inclination within a range for comfortable driving, but no pivoting into an upright position which facilitates access to the driver's platform .
  • From DE-A-29 01 192 a holder for an adjustable steering handwheel for motor vehicles with the features mentioned above is known, which, however, also has a relatively complex, expansive structure using many parts.
  • The object on which the invention is based is seen in specifying a pivoting mechanism of the type mentioned at the outset, in which the disadvantages mentioned are avoided and which has a compact, simple structure using relatively fewer simple parts and can be manufactured inexpensively.
  • The object is achieved on the basis of the preamble of claim 1 by its characterizing features. Further advantageous refinements and developments of the invention emerge from the subclaims.
  • A preferred embodiment of the pivot mechanism according to the invention contains an elongated steering column with a lower and an upper steering column part. The upper part of the steering column is carried by a bracket part and can be pivoted about an axis of rotation. On the lower pivoting column part, a segment part is arranged, which on one side contains a row of teeth with a tooth pitch and can basically be moved in the pivoting direction with respect to the lower steering column part. The tooth pitch is relatively fine and allows fine adjustment of the pivot angle. On the other side opposite the toothing, the segment part has two locking recesses that are spaced apart from one another. A manually operated pawl is arranged on the upper steering column part and is pivotable with it in such a way that it can be moved towards and away from the segment part. The pawl has a row of teeth which can be brought into engagement with and released from the row of teeth of the segment part. As a result, the upper steering column part can be fixed in a large number of pivoting positions within an area specified by the length of the rows of teeth by pivoting the upper steering column part into the desired position with initially separated teeth and then bringing the teeth into engagement by moving the pawl become.
  • There is also a rod which can be moved by an operator in the direction of the segment part and away from it and the end of which can be brought into engagement with one of the locking recesses of the segment part in order to fix the segment part with respect to the lower steering column part. When the rod is pulled out of one of the locking recesses, the console can be pivoted with the upper steering column part and the pawl as a unit up to a limit position in which the rod is received by the other locking recess. If the rod is pulled out of this locking recess, the console with the upper steering column part and the pawl can be pivoted back into the starting position as a unit, in which the rod is again received by the corresponding locking recess. A spring presses the console with the upper part of the steering column and the pawl into the limit position.
  • With reference to the drawing, which shows an embodiment of the invention, the invention and further advantages and advantageous developments and embodiments of the invention are described and explained in more detail below.
  • Fig. 1
    the side view of a pivotable steering column arrangement according to the invention,
    Fig. 2
    the compared to Fig. 1 enlarged side view of the steering column assembly in a normal working position,
    Fig. 3
    a view in the direction of the arrows 3 - 3 shown in FIG. 2,
    Fig. 4
    a sectional view in the direction of the arrows 4 - 4 shown in FIG. 2,
    Fig. 5
    the compared to FIG. 1 enlarged side view of the steering column arrangement in a raised position,
    Fig. 6
    the enlarged view of a pawl and a segment element of the pivotable steering column arrangement,
    Fig. 7
    a view in the direction of the arrows 7 - 7 shown in FIG. 6,
    Fig. 8
    a cross section in the direction of the arrows 8 - 8 and shown in Fig. 6
    Fig. 9
    a cross section in the direction of the arrows 9-9 shown in FIG. 6.
  • FIGS. 1, 2, 4 and 5 show a tiltable steering column arrangement 10 which contains a steering wheel 12 which is fastened to a steering spindle 14 extending through a housing 18. The steering spindle 14 extends through a steering column part 20, which is located further down, and which is fastened to the vehicle, and through an upper steering column part 22 which can be pivoted about an axis of rotation 24. The steering shaft 14 is carried by the lower steering column part 20. The lower steering column part 20 contains a fixed pair of arms 19, 21 which extend transversely to the axis of rotation 24 and upwards beyond this.
  • A console part 26 is fastened to the upper steering column part 22 by conventional means, not shown, and is likewise pivotable about the axis of rotation 24. As can be seen from FIGS. 2 to 5, the console part 26 has a center piece which forms a central bearing bush 27 with an opening 28 which receives the steering spindle 14. On opposite sides, on both sides of the bearing bushing 27, a side cheek 30, 32 is formed, which are connected to one another by a transverse cheek 34. In the end area of ​​each of the two side cheeks 30, 32 there extends a rotation axis opening 31. Between the opening 28 and the side cheek 30, a rectangular opening 36 extends through the bearing bush 27. In the side cheek 30 there is an arcuate slot 38 with a radius of curvature, the center of which is in the axis of rotation 24 lies. A wall 40 is formed adjacent to the opening 28 and forms a channel 42 with the side cheek 30 and the bearing bush 27 which coincides with the opening 36 and extends essentially perpendicular to the axis of rotation 24. An L-shaped guide member 44 is attached to the side cheek 30 and the transverse cheek 34 in such a way that the cheeks 30 and 34 together with the guide member 44 form a guide opening 46 which is aligned with the opening 36.
  • One end 47 of a spring 48 is received by a notch 43 which is let into one edge of the side cheek 32. The second end 49 of the spring 48 is hooked into a slot 45 which is let into the arm 19. The spring 48 is biased to pivot the console part 26 and the upper steering column part 22 as shown in FIGS. 1, 2 and 5 in the clockwise direction.
  • A segment part 50 fastened to the arm 19 contains an arcuate center piece 52 with a convex side 54 and a concave side 56. A toothing 58 is attached to the convex side 54. A channel 60 extends on the concave side 56 between two locking recesses 62, 64, which are located exactly within two end walls 66, 68. The end walls 66, 68 form abutment surfaces 67, 69 spaced pin pocket bores 70 let in. Pins 72 are pressed into these bores 70. As can best be seen from FIG. 4, the segment part 50 is arranged displaceably between the wall 40 and the side cheek 30, the pins 72 being guided within the slot 38. The toothing 58 faces the guide member 44. The segment part 50 has a channel 74 which forms a free space for the arm 21.
  • A pawl 80 has an elongated body 82 which carries a toothing 84 at one end. In the body 82, a longitudinally extending groove 86, 88 and an eye 90 on one side are also formed on opposite sides. A bore 92 extends through the eye 90. As best shown in FIG. 4, the pawl 80 is arranged in the channel 42 such that it can be moved back and forth in the channel 42 and the guide opening 36 so that their teeth 84 can be engaged and disengaged in the teeth 58 of the segment 50. An intermediate member 94 connects the pawl 80 to a manually operable lever 96 so that by actuating the lever 96 the teeth 84 of the pawl 80 can be brought into and out of engagement with the teeth 58 of the segment. The lever 96 is fastened pivotably to the side cheek 30 by a screw 97 which is received in a bore 99 in the side cheek 32. A pretensioned spring 98 is arranged between the lever 96 and the console part 26 and pulls the lever 96 and thus the pawl 80 in the direction of engagement.
  • Two rod guides 104 fastened to the arm 21 have bores in which one end 102 of an elongated rod 100 is guided so as to be axially displaceable. The end 102 of the rod 100 can be received by one of the locking recesses 62, 64 of the segment part 50 so that it engages the corresponding abutment surface 67, 69. The other end of the rod 100 is coupled via a pivot bearing to a pedal 106 which can be actuated by the operator. A spring 108 engages the pedal 106 and pulls it clockwise according to FIG. 1, so that the end 102 of the rod 100 is pressed in the direction of the segment 50 into the locking recesses 62, 64.
  • The operation is carried out as follows:
    If the steering column assembly 10 is to be pivoted from the position shown in FIGS. 1 and 2 by a small amount within the range defined by the extension of the toothing 58, it is only necessary to tighten the free end of the lever 96, as it is indicated in Fig. 1 by the arrow. As a result, the pawl 80 is pulled away from the toothing 58 of the segment 50, which makes it possible to pivot the pawl 80, the console part 26, the upper steering column part 22, the upper part of the steering spindle 14 and the steering wheel 12 about the axis of rotation 24. At the same time, the rod end 102 remains in the locking recess 64, which prevents the segment 50 from pivoting about the pivot axis 24. When the new skew is set, the lever 96 is released and the spring 98 pulls the teeth 84 of the pawl 80 back into engagement with the teeth 58 of the segment 50 so that the desired inclination is maintained until a new inclination is desired and the lever 96 is tightened again.
  • If the steering column arrangement 10 is to be raised by a maximum amount, for example from the position shown in FIG. 2 to the position shown in FIG. 5, it is only necessary to press the free end of the pedal 106 down in the direction of the arrow. As a result, the rod end 102 is pulled out of the locking recess 64 of the segment 50, so that the spring 48, the steering column assembly 10 with the segment 50, the pawl 80, the console part 26, the upper part of the steering shaft 14 and the steering wheel 12 clockwise around the axis of rotation 24 pivoted. The steering column arrangement 10 pivots in this direction until the rod end 102 abuts the abutment surface 67 of the end wall 66. When the pedal 106 has been released, the rod end 102 now slides into the locking recess 62 so that the steering column assembly 10 is releasably held in its fully erected position. At the same time, the toothing 84 of the pawl 80 remains in engagement with the toothing 58 of the segment 50, so that a relative movement between the steering wheel 12 and the segment 50 is prevented. When the pedal 106 is pressed down again, the steering wheel 12 can be pivoted back by hand against the force of the spring 48 and counterclockwise until the rod end 102 strikes the abutment surface 69 of the end wall 68 and slides into the locking recess 64.In this position, the steering wheel 12 assumes its original position, since the relationship between the pawl 80 and the segment 50 has not changed. The system "remembers", as it were, of its original position.

Claims (9)

  1. Swivel mechanism for the steering wheel assembly of a vehicle
    - With a steering column which has a lower steering column part (20) fixed to the vehicle and an upper steering column part (22) which can be pivoted about a horizontal axis of rotation (24) fixed on the lower steering column part (20),
    - With a locking device which comprises a segment part (50) coupled to the lower steering column part (20) with a toothing (58) and a pawl (80) coupled to the upper steering column part (22) which can be manually engaged with this toothing (58) , in such a way that by actuating the pawl (80) it can be moved towards and away from the toothing (58) of the segment part (50) in order to fix the upper steering column part (22) optionally in different pivoting positions relative to the segment part (50),
    - and with a locking device, by means of which the upper steering column part (22) can be releasably fixed in at least one pivot position and when unlocked, the upper steering column part (22) can be pivoted relative to the lower steering column part (20) within a defined pivoting range, even with the locking device engaged ,
    characterized,
    - That the segment part (50) has a first abutment (69) and a second abutment (67) spaced apart from this in the pivoting direction as well as at least one locking recess (64) which is arranged adjacent to the first abutment (69),
    - That the locking device contains a locking part (100) which can be moved towards and away from the segment part (50) by an operator and which cooperates with the abutments (67, 69) and the locking recess (64) in order to move the segment part ( 50) within the defined swivel range and in selected swivel positions, and
    - That spring means (48) are provided, which the segment part (50) and the upper steering column part (20) locked with this by the latching device from a normal position in which the locking part (100) engages in the locking recess (64) into a Push the limit position in which the locking part (100) pulled out of the locking recess (64) rests against the second abutment (67).
  2. Pivoting mechanism according to Claim 1, characterized in that the upper steering column part (22) contains an essentially U-shaped console part (26) which is oriented essentially perpendicular to the axis of rotation (24) and is attached to the guide means for the pawl (80) are.
  3. Pivoting mechanism according to claim 1 or 2, characterized in that the pawl (80) carries a toothing (84) on the steering column side and is guided by guide means on the upper steering column part (22) or the console part (26) so that it can be displaced parallel to the steering column and by a handle (96 ) can be actuated against the force of a spring (98) in such a way that the toothing (84) on the steering column side lifts off from the toothing (58) on the vehicle body side.
  4. Swivel mechanism according to one of Claims 1 to 3, characterized in that the surface of the segment part (50) in which the locking recess (64) is located lies opposite the surface which carries the toothing (58).
  5. Swivel mechanism according to one of Claims 1 to 4, characterized in that the segment part (50) has a further locking recess (62) which is arranged adjacent to the second abutment (67) and into which the locking part (100) engages when the upper steering column part (22 ), the segment part (50) and optionally the console part (26) are in their upper limit position.
  6. Swivel mechanism according to one of Claims 1 to 5, characterized in that the console part (26) or the segment part (50) has at least one arcuate slot (38) and that of the other of the two parts (26, 50) at least one pin (72 ) which is slidably received in the slot (38) and which, with the ends of the slot (38), limits the relative movement between the console part (26) and the segment part (50).
  7. Pivoting mechanism according to Claim 6, characterized in that two pins (72) protrude from the other of the two parts (26, 50) which are slidably received by the slot (38) and each with one of the ends of the slot (38) the relative Limit movement between the console part (26) and the segment part (50).
  8. Swivel mechanism according to one of Claims 2 to 7, characterized in that the bracket (26) contains a bearing bush (27) through which the steering spindle (14) extends, and two side cheeks (30, 32), that the two side cheeks (30 , 32) are arranged on both sides of the bearing bush (27) and extend essentially parallel to the steering spindle axis, that each of the side cheeks (30, 32) has support means for the rotatable mounting of the console (26) about the axis of rotation (24) and that the bearing bush ( 27) and one of the side cheeks (30) form a channel (42) in which the segment part (50) is arranged displaceably.
  9. Pivoting mechanism according to one of Claims 2 to 8, characterized in that the bracket (26) contains a bearing bush (27) which has a first opening (28) which receives part of the steering spindle (14) and one to the first opening (28) ) has adjacent second opening (36) and that the pawl (80) and the segment part (50) can be brought into engagement with one another through the second opening (36).
EP199301000381992-01-141993-01-05Swiveling mechanism for the steering wheel arrangement of a vehicle Expired - LifetimeEP0555627B1 (de)

Priority Applications (2)