POSITION ADJUSTMENT DEVICE FOR STEERING WHEEL
First Claim
1. A position adjustment device for a steering wheel comprising:
- a cylindrical outer column in which at least the inner diameter of a part in the axial direction can be expanded and contracted;
a cylindrical inner column which is fitted and supported on the inner diameter side of this outer column so as to be capable of axial displacement;
a steering shaft which is rotatably supported on the inner diameter side of this inner column, and which fixes a steering wheel on a rear end section thereof projecting to the rear side of a rear end opening section of this inner column;
a pair of supporting plate sections which is provided on a support bracket supported on a vehicle body, in a state of sandwiching, from widthwise both sides, a portion of the outer column where the inner diameter can be expanded and contracted;
a rod-shaped member arranged in the widthwise direction which is inserted through first through holes formed in positions of both of the support plates which align with each other, and through second through holes formed in portions of a part of the outer column and do not interfere with the inner column, and which, as it rotates, increases or reduces the distance between mutually opposing surfaces of both the support plates; and
an adjustment lever, a base end section of which is joined and fixed on this rod-shaped member in order to rotate this rod-shaped member,the device further comprising;
a support shaft, in a state of being arranged parallel with the rod-shaped member, supported on part of the outer column; and
a telescoping locking eccentric cam, a base section of which is supported on an intermediate section of this support shaft;
a portion of the telescoping locking eccentric cam, which opposes to an outer circumferential surface of the inner column or to a surface of a member fixed on this inner column, being of a telescoping locking convex arc edge in which the distance from the center of the support shaft becomes greater with approach to the rear side,a telescoping locking serrated section being formed on this telescoping locking convex arc edge,a spring being provided between the adjustment lever and the support shaft, andthe spring allowing, as this adjustment lever being swing displaced from a state of adjusting the position of the steering wheel to a state of fixing it, for giving the support shaft an elastic force in a direction of pressing the telescoping locking serrated section against the outer circumferential surface of the inner column, or against the surface of a member fixed on the inner column.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention realizes a structure for a tilt-telescopic steering device, capable of, without requiring particularly high accuracy, effectively preventing a steering wheel from being positionally displaced in a secondary collision. When an adjustment lever 18a is turned, tilt-locking serrated sections 54 of a pair of tilt-locking eccentric cams 23a and 23b are pressed against curved edges 53 of support plates 40. Moreover, a telescoping locking serrated section 62 of a telescoping locking eccentric cam 58 is pressed against the lower surface of an inner column. In a secondary collision, each of the serrated sections 54 and 62 engage with a mating surface thereof, to thereby prevent a steering wheel 1 from being displaced and moved.
58 Citations
13 Claims
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1. A position adjustment device for a steering wheel comprising:
- a cylindrical outer column in which at least the inner diameter of a part in the axial direction can be expanded and contracted;
a cylindrical inner column which is fitted and supported on the inner diameter side of this outer column so as to be capable of axial displacement;
a steering shaft which is rotatably supported on the inner diameter side of this inner column, and which fixes a steering wheel on a rear end section thereof projecting to the rear side of a rear end opening section of this inner column;
a pair of supporting plate sections which is provided on a support bracket supported on a vehicle body, in a state of sandwiching, from widthwise both sides, a portion of the outer column where the inner diameter can be expanded and contracted;
a rod-shaped member arranged in the widthwise direction which is inserted through first through holes formed in positions of both of the support plates which align with each other, and through second through holes formed in portions of a part of the outer column and do not interfere with the inner column, and which, as it rotates, increases or reduces the distance between mutually opposing surfaces of both the support plates; and
an adjustment lever, a base end section of which is joined and fixed on this rod-shaped member in order to rotate this rod-shaped member,the device further comprising;
a support shaft, in a state of being arranged parallel with the rod-shaped member, supported on part of the outer column; and
a telescoping locking eccentric cam, a base section of which is supported on an intermediate section of this support shaft;a portion of the telescoping locking eccentric cam, which opposes to an outer circumferential surface of the inner column or to a surface of a member fixed on this inner column, being of a telescoping locking convex arc edge in which the distance from the center of the support shaft becomes greater with approach to the rear side, a telescoping locking serrated section being formed on this telescoping locking convex arc edge, a spring being provided between the adjustment lever and the support shaft, and the spring allowing, as this adjustment lever being swing displaced from a state of adjusting the position of the steering wheel to a state of fixing it, for giving the support shaft an elastic force in a direction of pressing the telescoping locking serrated section against the outer circumferential surface of the inner column, or against the surface of a member fixed on the inner column. - View Dependent Claims (9)
- a cylindrical outer column in which at least the inner diameter of a part in the axial direction can be expanded and contracted;
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2. A position adjustment device for a steering wheel provided with:
- a cylindrical outer column in which a front section thereof is supported, directly or through another member, on a portion to be fixed on a vehicle body, so as to be capable of swing displacement about a pivot shaft installed in the widthwise direction, and at least the inner diameter of a part in the axial direction can be expanded and contracted;
a cylindrical inner column which is fitted and supported on the inner diameter side of this outer column so as to be capable of axial displacement;
a steering shaft which is rotatably supported on the inner diameter side of this inner column, and which fixes a steering wheel on a rear end section thereof projecting to the rear side of a rear end opening section of this inner column;
a pair of supporting plate sections which is provided on a support bracket supported on a vehicle body, in a state of sandwiching, from widthwise both sides, a portion of the outer column where the inner diameter can be expanded and contracted;
a rod-shaped member arranged in the widthwise direction, which is inserted through long holes which are formed in a position of both of the support plates which align with each other and which are long in a direction of an arc about the pivot shaft, and through through holes formed in a portion of the outer column and do not interfere with the inner column, and which, as it rotates, increases or reduces the distance between mutually opposing surfaces of both the support plates; and
an adjustment lever, the base end section of which is joined and fixed on this rod-shaped member,the device further comprising;
a curved edge in the shape of an arc about the pivot shaft, which is provided at least on a part of the rear end edge of the support plates;
a support shaft supported, in a state of being arranged parallel with the rod-shaped member, on a part of the outer column;
a tilt-locking eccentric cams supported on this support shaft; and
a telescoping locking eccentric cam supported on this support shaft,a portion of the tilt-locking eccentric cams, which opposes to the curved edge, being of a tilt-locking convex arc edge in which the distance from the center of the support shaft becomes greater with approach to the rear side, and a tilt-locking serrated section being formed on this tilt-locking convex arc edge, a portion of the telescoping locking eccentric cam, which opposes to the outer circumferential surface of the inner column or to the surface of a member fixed on this inner column, being of a telescoping locking convex arc edge, in which the distance from the center of the support shaft becomes greater with approach to the rear side, and a telescoping locking serrated section being formed on this telescoping locking convex arc edge, the base section of one of the tilt-locking eccentric cam and telescoping locking eccentric cam, being fixed on the support shaft so as to rotate together with this support shaft, the base section of the other eccentric cam being supported on this support shaft so as to be capable of swing displacement with respect to this support shaft by a predetermined angle, between the other eccentric cam and support shaft, there being provided a first spring having an elastic force in a direction of pressing a locking serrated section provided in the other eccentric cam, against a mating portion thereof, between the adjustment lever and the support shaft, there being provided a second spring allowing for giving the support shaft an elastic force in a direction of pressing the locking serrated section provided on each of the eccentric cams, against the mating portion thereof, as the adjustment lever being swing-displaced from a state of adjusting the position of the steering wheel, to a state of fixing it. - View Dependent Claims (3, 4, 5, 6, 7, 8, 10, 11, 12, 13)
- a cylindrical outer column in which a front section thereof is supported, directly or through another member, on a portion to be fixed on a vehicle body, so as to be capable of swing displacement about a pivot shaft installed in the widthwise direction, and at least the inner diameter of a part in the axial direction can be expanded and contracted;
Specification