JPH0790779B2 - Steering wheel - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering wheel used in a vehicle that makes it possible to detect steering force.

BACKGROUND ART In power steering used in vehicles, a steering force sensor and a steering amount sensor are arranged on a steering shaft to detect the steering force and the steering amount, and the detected steering force and steering amount are used for steering. The delay is being corrected.

However, since the steering force sensor and the steering amount sensor detect distortion and displacement of the steering shaft,
Due to the inertia of the steering wheel itself, it was difficult to quickly detect the correct steering force and steering amount.

OBJECT AND PROBLEM OF THE INVENTION The purpose and problem of the present invention is to provide a steering system capable of responding quickly to a steering force, and capable of detecting the steering force during steering without being affected by the inertia of the steering wheel itself. In the provision of wheels.

Another object and problem of the present invention is to make it possible to respond to steering force quickly, to reduce the hysteresis of the sensor output without being affected by the inertia of the steering wheel itself during steering, and to detect steering force, and The purpose of the present invention is to provide a steering wheel capable of sensing steering force for accurate correction of power steering delay during steering.

Still another object and problem of the present invention is to enable quick response to steering force, improve neutral return for sensor output without being affected by inertia of the steering wheel itself during steering, and improve the sensor output. Reduce hysteresis, and
It is an object of the present invention to provide a steering wheel capable of detecting a steering force, and capable of sensing the steering force to make a quick and accurate correction of a power steering delay during steering.

SUMMARY OF THE INVENTION OBJECTS AND PROBLEMS Outline of Claimed Invention In relation to the above objects and problems, a steering wheel of the present invention is a spoke mounted on a steering shaft, and fixedly connected to the spoke, Also, a rim having an annular ball groove on its outer peripheral surface, is opposed to the outer peripheral surface at an appropriate distance from the outer peripheral surface, and is movable relative to the rim in the rotational direction so that the rim is And a plurality of ball holders arranged coaxially on the outer side of the ball and facing the ball groove and arranged on the sensing ring at predetermined intervals in the circumferential direction of the ring. ,
A plurality of balls held in the ball holder and fitted into the ball grooves, and arranged around the rim in rolling contact with the rim through the balls when a steering force is applied. The sensing ring can be moved quickly so that the sensing ring can move relative to the rim.

Further, the steering wheel of the present invention includes a spoke mounted on a steering shaft, a rim fixedly connected to the spoke, and a rim having an annular ball groove on an outer peripheral surface thereof, and an appropriate gap from the outer peripheral surface. The sensing ring, which faces the outer peripheral surface of the rim, is movable relative to the rim in the rotational direction, and is coaxially arranged on the outer side of the rim, and faces the ball groove. A plurality of ball holders arranged on the sensing ring at predetermined intervals in the circumferential direction of the sensing ring, a plurality of balls held by the ball holder and fitted in the ball groove, and a rim thereof. And means for detecting relative displacement between the sensing ring and the sensing ring, and through the ball when steering force is applied. Of the sensing ring placed around the rim in rolling contact with the rim of the rim so that the sensing ring can move relative to the rim, and The output hysteresis is reduced so that the steering force and its direction can be sensed by the detection means.

Further, the steering wheel of the present invention includes a spoke mounted on a steering shaft, a rim fixedly connected to the spoke, and a rim having an annular ball groove on an outer peripheral surface thereof, and an appropriate interval from the outer peripheral surface. Facing the outer circumferential surface of the rim and being movable relative to the rim in the direction of rotation, the sensing ring coaxially arranged outside the rim and facing the ball groove. A plurality of ball holders arranged on the sensing ring at predetermined intervals in the circumferential direction of the sensing ring, a plurality of balls held by the ball holder and fitted into the ball groove, The gauge beam that fixes the root to the steering shaft side and extends the tip to the sensing ring, and the gauge beam It is disposed on the sensing ring in relation to the distal end of the over arm and the gauge at a slight gap in the rotational direction of the sensing ring
A connector that accepts the tip of the beam and can transmit the movement of the sensing ring to the gauge beam,
A displacement detecting means attached to the gauge beam, and when steering force is applied to the sensing ring disposed around the rim in rolling contact with the rim through the ball. Responsive to allow the sensing ring to move relative to the rim, and reduce sensor output hysteresis, as well as the sensor output due to the slight gap that the connector gives to the gauge beam. Is to improve the neutral return for the sensor so that the steering force by the sensor and its direction can be sensed.

Furthermore, the steering wheel of the present invention includes a hub attached to a steering shaft, a plurality of spokes protruding from the hub at predetermined intervals, and fixedly connected between the spokes and having an outer peripheral surface. A rim having an annular ball groove and a rim having an appropriate distance from the outer peripheral surface of the rim, which faces the outer peripheral surface, is movable relative to the rim in the rotational direction, and is coaxial with the outer side of the rim. And the plurality of ball holders that are placed on the sensing ring at predetermined intervals in the circumferential direction of the sensing ring facing the ball groove and are held by the ball holder. A plurality of balls to be fitted into the ball groove, and the root is fixed to the hub side, and the tip is extended to the sensing ring. And the gauge beam that, the cage
It is located on the sensing ring in relation to the tip of the beam, and receives the tip of the gauge beam with a slight gap in the direction of rotation of the sensing ring to allow movement of the sensing ring to the gauge. In the direction of rotation, the connector that enables transmission to the beam, the displacement detection means attached to the gauge beam,
A spoke cover that is movable relative to the spoke and rim and is connected to the sensing ring,
A centering device disposed between either one of the spokes and the spoke cover, and
When a steering force is applied, it is placed around the rim in rolling contact with the rim via the ball. The sensing ring can be moved quickly so that the sensing ring can move relative to the rim, and the hysteresis of the sensor output can be reduced.
In addition, the slight gap the connector gives to the gauge beam and its centering device positively improve the neutral return due to the sensor output so that the steering force by the sensor and its direction can be sensed. .

Description of Specific Examples Specific specific examples of the steering wheel of the present invention will be described below with reference to the drawings.

1 to 8 show a concrete example 10 of the steering wheel of the present invention used for power steering of an automobile.
Is shown.

The steering wheel 10 includes a metal hub 11 mounted on a steering shaft 60, a pair of metal spokes 12 and 13, a metal rim 14, an aluminum alloy sensing ring 15, and an aluminum alloy rim.・
A cover 16, a synthetic resin skin 17, a plurality of ball holders 18, 19, 20 and a plurality of balls 21, 22, 23 arranged between the sensing ring 15 and the ball holders 18, 19, 20.
, Gauge beam 24, connector 25, and displacement detection means
26, a synthetic resin spoke cover 27, a centering device 28, and a synthetic resin horn cover 29 are configured to be a steering force sensing type.

The pair of spokes 12 and 13 are welded to the hub 11,
It is radially projected from the hub 11 at predetermined intervals.

The rim 14 is welded to the tips of the spokes 12 and 13 and is fixedly connected between the spokes 12 and 13.

The rim 14 is also welded between the tips of the spokes 12, 13 by machining an annular ball groove 31 in the outer peripheral surface 30 which determines the wheel ring diameter, as can be seen from FIGS. 2 and 3. ing.

In that way, the rim 14 is fixedly connected between the spokes 12, 13 and constitutes the body of the steering wheel 10.

The rim 14 also has its gauge beam 24, as shown in FIGS. 4 and 5, cut out a beam relief 32 adjacent the spoke 12 and extending the tip into its sensing ring 15. It is designed so that it can be bent freely within a predetermined range.

The sensing ring 15 is, as shown in FIGS. 2 and 3, cast from an aluminum alloy into a ring having a cross section obtained by cutting the tube in half in the axial direction. Its outer peripheral surface at intervals
It is arranged coaxially outside the rim 14 so as to face the rim 30 and to be movable relative to the rim 14 in the rotation direction of the steering wheel 10.

As shown in FIG. 2, the sensing ring 15 is integrally formed with three bosses 34 radially protruding from the inner peripheral surface 33 at intervals of 120 degrees in the circumferential direction. . Of course, the bosses 34 are provided with threaded through holes 35, respectively.

These through holes 35 are, of course, screwed ball holder
The boss 34 is pierced so that the 18, 19 and 20 faces the annular ball groove 31 of the rim 14.

The rim cover 16, similar to the sensing ring 15, is cast from aluminum alloy into a ring of axial cross section cut in half the tube as shown in FIGS. 2 and 3. , Is arranged around the rim 14 at appropriate intervals outside the rim 14, and is butt-connected to the sensing ring 15 and cooperates with the sensing ring 15 to form a hollow ring. .

Further, two spoke relief openings 36 are formed in the rim cover 16 at intervals of 120 degrees in the circumferential direction.
Avoid hitting the cover 16 and its spokes 12, 13.

The outer skin 17 is a skin layer of the steering wheel 10, which is made of synthetic resin, and includes the hub 11, the spokes 12, 13, the rim 14, the sensing ring 15, and the rim.
After the cover 16, the ball holders 18,19,20, the balls 21,22,23 and the gauge beam 24 are assembled, they are integrally formed on the outer surface of the sensing ring 15 and the rim cover 16. .

In particular, the outer skin 17 is preferably made of a hard synthetic resin in terms of handle operation.

The three ball holders 18, 19, 20 consist of a stem 37 threaded on the outer peripheral surface and a pushing end 38 extended at the tip of the stem 37.
A driver groove 39 is formed in the head of 37 and a ball pocket 40 is formed in the pushing end 38 thereof. Of course, the screw formed on the outer peripheral surface of the stem 37 may be continuously formed on the outer peripheral surface of the pushing end 38.

The ball holder 18,19, manufactured in such a structure
20 is screwed into a through hole 35 of a boss 34 formed in the sensing ring 15.

As such, the ball holders 18, 19, 20 screwed into the through holes 35 of the boss 34 are exposed to the annular ball groove 31 of the rim 14 and are provided in a predetermined circumferential direction of the sensing ring 15. The sensing at intervals of 120 degrees
Attached to ring 15.

As such, the ball holders 18, 19, 20 located on the sensing ring 15 hold the balls 21, 22, 23 in engagement with the annular ball groove 31 of the rim 14 and roll. The sensing ring 15 is assembled to the rim 14 in a contact state, the sensing ring 15 is movable relative to the rim 14, and the hysteresis of the sensor output is reduced.

The three balls 21,22,23 are the ball holders 18,1
It is fitted into the ball pocket 40 of 9,20 and is held in its ball holder 18,19,20.
The 9, 20 are screwed into the through holes 35 of the boss 34 so that they are fitted into the annular ball groove 31 of the rim 14.

So that ball 21,22,23 is its ball holder
In collaboration with 18,19,20, its rim 14 and its sensing
Form a rolling contact with the ring 15.

The gauge beam 24 is made of a leaf spring material, and as shown in FIG. 1, the roots are screwed to the brackets 43 welded to the spokes 12 and fixed to the hub 11 side,
Also, through the beam escape 32 of the rim 14, the rim 14
Of the sensing ring by protruding to the outside of the outer peripheral surface 30
The tip is extended to 15, and the tip is fitted to the connector 25. Of course, when the steering force is not applied,
As shown in FIGS. 4, 5, and 7, the gauge
The beam 24, due to its centering device 28,
In the circumferential direction of the rim 14 and the sensing ring 15, it is located in the center of the beam escape 32 and the connector 25, and in the beam escape 32, large gaps S are formed on both sides of the beam, and the connector At 25, a slight gap δ is formed on each side of the beam.

The gauge beam 24 so positioned is bent and distorted within the beam relief 32 when a steering force is applied.

The connector 25 is adjacent to the spoke 12 and is associated with the tip of the gauge beam 24 and the beam relief 32 of the sensing ring 15 as can be seen from FIGS. 4, 6 and 7. It is positioned on the inner peripheral surface 33 and arranged on the sensing ring 15.

The connector 25 is formed into a socket at a boss 44 that faces the outer peripheral surface 30 of the rim 14 and projects from the inner peripheral surface 33 of the sensing ring 15, and the gauge 25
Accepts the tip of beam 24 and its sensing ring 15
The movement of the can be transmitted to the gauge beam 24.

In particular, this connector 25 receives the tip of the gauge beam 24 in the center by its centering device 28, as shown in FIG.・ Ring 15
The gauge beam 24 receives the tip of the gauge beam 24 with a slight gap δ on either side of the beam in the direction of rotation.
Of course, the connector 25 may be formed in the notch or groove in the boss 42, and may have a deformed structure.

The displacement detecting means 26 is a strain gauge,
The strain gauge 26 is an electric resistance strain wire unit 45 attached to the left and right plate surfaces 41, 42 of the gauge beam 24,
46, and is electrically connected to a controller (not shown) that controls a pressure oil injection valve (not shown) arranged in the hydraulic circuit of the power steering.

As can be seen from FIG. 1, the spoke cover 27 is made of a synthetic resin half-molded product.
3, gauge beam 24, and centering device 2
8 from above and below, butted against each other and welded at the butted parts, and both ends were butted against the rim cover 16 and fixed to the rim cover 16 with its skin 17 It is attached to the spokes 12, 13 and the rim cover 16.

The centering device 28 is arranged between the spoke 13 and the spoke cover 27 so that when the steering force is not exerted, the gauge beam 24 causes the rim 14 to move.
It is located in the center of the beam relief 32 and the connector 25, that is to say that the gauge beam 24 is left free.

To further elaborate, the centering device 28
As shown in FIG. 8, a casing 47 arranged at the tip of the spoke 13, a pair of pistons 48, 49 fitted in the casing 47 so as to be reciprocally slidable, and the pistons 48, 49. Between the compression spring 50 arranged in the casing 47 and a pair of pins 51, 52 arranged in the spoke cover 27 in relation to the pistons 48, 49 in the casing 47. There is.

The casing 47 is made into a cylinder from a cylindrical casing body 53 and end plates 54, 55 attached to both ends of the casing body 53, and the casing body 53 is welded to the tip portions of the spokes 13. , Attached to its spoke 13.

In addition, the end plates 54 and 55 have bores 5 respectively.
6 is formed, its bore 56 has its spoke cover 27
As they are moved relative to their spokes 12,13, causing their pins 51,52 to push and pull their compression springs 50 through their pistons 48,49. It is possible.

The pair of pins 51, 52 are connected to the bores 56, 56 of the casing 47.
The spoke cover 27 is integrally molded with the spoke cover 27 so that the spoke cover 27 can be moved in and out. Therefore, when the steering force is not applied, the pins 51 and 52 are
In the state shown in the figure, the compression spring 50 exerts a spring force via its pistons 48, 49,
As a result, the centering device 28 keeps the steering wheel 10 in the neutral position.

The horn cover 29 is a molded product of synthetic resin and is arranged on the hub 11. Of course, this horn cover 29
Is shaped into a triangle that is related to the shape of the spoke cover 27, which improves the appearance of the steering wheel 10 in relation to the spoke cover 27.

Next, the steering wheel configured as described above
Referring to the operation of 10, if steering force is now applied to the steering wheel 10 that causes it to rotate in either the left or right direction, the steering force is first applied to the rim wheel.
It acts on a sensing ring 15 integrated into the cover 16 and the skin 17, which sensing ring 15 is rotated relative to its rim 14 in rolling contact in either the left or right direction, such that Nano Sensing Ring
With the rotation of 15, its connector 25 is also rotated relative to its rim 14 in the same direction as its sensing ring 15.

As such, because its steering force is transmitted, its gauge beam 24 is bent in either the left or right direction by its connector 25 with its sensing ring 15 being rotated relatively, A strain is generated and the strain gauge 26 detects the bending strain of the cage beam 24.

As such, the steering force and its direction are sensed by the strain gauge 26 and converted into a signal which is provided to the controller which controls the current flowing through the pressure oil injection valve. Then, the pressure oil injection valve is opened, the pressure oil is sent to the directional control valve (not shown) of the power steering, and the pressure oil is quickly supplied to the power cylinder of the power steering. , Its power steering prevents delay.

Further, as described above, the sensing ring 15 in which the rim cover 16 and the skin 17 are integrated is rotated relative to the rim 14, and the gauge beam 24 is cut out in the rim 14. The inner surface of one of the beam escapes 32 is momentarily hit.

After the gauge beam 24 hits the inner surface of one of the beam escapes 32, the rim 14 is rotated with the sensing ring 15 in either the left or right direction,
As a result, through its spokes 12, 13 and hub 11,
The steering shaft 60 is rotated, and the control valve of the power steering is switched according to the rotation of the steering shaft 60.

Therefore, in this power steering the inertia is made very small, and its gauge beam 24 is bent by its connector 25, which is accompanied by its sensing ring 15 in rolling contact with its rim 14,
When the strain gauge 26 is distorted, the strain gauge 26 detects the bending strain of the gauge beam 24, the steering force and its direction are sensed, and the steering force sensed by the strain gauge 26 and its direction are detected. The rim 14 and steering shaft 60 are converted into an electrical signal, which causes the controller to control the pressure oil injection valve located in the hydraulic circuit of the power steering.
The steering force and the direction of the steering force are detected substantially without delay, and the hysteresis of the sensor output is made very small to be accurately detected, and the delay of the power steering is delayed. Certainly blocked.

Further, when the steering force is removed and the steering wheel 10 is returned, the centering device 28 causes the gauge beam 24 to move to the state shown in FIG. The connector 25 is returned to the state shown in FIG.

As such, in this steering wheel 10, its sensing ring 15 makes its inertia very small,
And, because it is assembled into the rim 14 in a rolling contact state, the hysteresis of the sensor output is reduced to a very small value, the dead zone for the sensor output is improved, and the gauge beam 24 and its connector 25 are Since the centering device 28 is provided in addition to the slight gaps δ, δ provided therebetween, the neutral return failure is improved.

In the steering wheel 10 described above, the strain gauge is used as the means 26 for detecting the relative displacement between the rim 14 and the centering ring 15.
The displacement detecting means 26 can be appropriately selected and used from a Hall element, a Hall IC, a magnetoresistive element, a strained semiconductor element and the like.

As will be apparent from the characterized embodiments of the present invention described above with reference to the drawings, those of ordinary skill in the art to which the present invention pertains,
The subject matter of this invention is readily embodied in alternative forms which are derived from the nature and substance of the invention and which are objectively admitted to incorporate them. Of course, the contents of the present invention are commensurate with the subject of the invention and are essential to the establishment of the invention.

Benefits of the Invention As can be seen from the above, the steering wheel of the invention
The wheel is fixedly connected to the spoke, which is attached to the steering shaft, and
A rim having an annular ball groove on the outer peripheral surface and facing the outer peripheral surface at an appropriate distance from the outer peripheral surface,
In addition, the sensing ring, which is movable relative to the rim in the direction of rotation and is coaxially arranged outside the rim, and the ball groove facing the sensing ring, is arranged in the circumferential direction of the sensing ring. Since the plurality of ball holders arranged on the sensing ring at a predetermined interval and the plurality of balls held by the ball holder and fitted in the ball groove are included, the steering wheel according to the present invention includes: When a steering force is applied, the inertia is reduced and then quickly responded to the sensing ring, which is placed around the rim in rolling contact with the rim via the ball, and the sensing The ring is moved relative to its rim, which, during steering, affects the large inertia of the rim and steering shaft. Steering force is to be detected without being,
As a result, it is very useful and practical for power steering used in vehicles.

Further, the steering wheel of the present invention includes a spoke mounted on a steering shaft, a rim fixedly connected to the spoke, and a rim having an annular ball groove on an outer peripheral surface thereof, and an appropriate gap from the outer peripheral surface. The sensing ring, which faces the outer peripheral surface of the rim, is movable relative to the rim in the rotational direction, and is coaxially arranged on the outer side of the rim, and faces the ball groove. A plurality of ball holders arranged on the sensing ring at predetermined intervals in the circumferential direction of the sensing ring, a plurality of balls held by the ball holder and fitted in the ball groove, and a rim thereof. And a means for detecting the relative displacement between the sensing ring and the sensing ring, the steering wheel of the present invention includes a steering force. When added, the inertia is small,
The ball is then rolled into contact with the rim through the ball and is quickly responded to by the sensing ring being placed around the rim, and the sensing ring moves relative to the rim. Therefore, during steering, the hysteresis of the output of the detection means is reduced without being affected by the large inertia of the rim and the steering shaft, and the steering force can be detected, that is, the power steering during steering is turned off. The steering force and its direction, which makes the delay correction accurate, are perceptible, and as a result are very useful and practical for power steering used in vehicles.

Further, the steering wheel of the present invention includes a spoke mounted on a steering shaft, a rim fixedly connected to the spoke, and a rim having an annular ball groove on an outer peripheral surface thereof, and an appropriate interval from the outer peripheral surface. The sensing ring, which faces the outer peripheral surface of the rim, is movable relative to the rim in the rotational direction, and is coaxially arranged on the outer side of the rim, and faces the ball groove. A plurality of ball holders arranged on the sensing ring at predetermined intervals in the circumferential direction of the sensing ring, and a plurality of balls held by the ball holder and fitted into the ball groove;
The root is fixed to the steering shaft side, the gauge beam that extends the tip to the sensing ring and the sensing ring is arranged in relation to the tip of the gauge beam, and the sensing ring Includes a connector for receiving the tip of the gauge beam with a slight gap in the rotational direction and transmitting the movement of the sensing ring to the gauge beam, and a displacement detection means attached to the gauge beam Thus, in the steering wheel of the present invention, the inertia of the steering wheel is reduced when steering force is applied, and its sensing ring is placed around the rim in rolling contact with the rim via the ball. The sensing ring is moved relative to the rim. The sensor beam hysteresis is reduced to a very small value when it is steered, without being influenced by the large inertia of its rim and steering shaft, and its gauge beam and displacement detection The means make it possible to detect the steering force and its direction, i.e. the steering force and its direction to make the steering delay correction of the power steering accurate during steering, and the steering force. Is removed, the slight gap that the connector gives to the gauge beam improves the neutral return for the sensor output and improves the dead zone for the sensor output, so that it can be used in vehicles. Very useful and practical for power steering.

Furthermore, the steering wheel of the present invention includes a hub attached to a steering shaft, a plurality of spokes protruding from the hub at predetermined intervals, and fixedly connected between the spokes and having an outer peripheral surface. A rim having an annular ball groove and a rim having an appropriate distance from the outer peripheral surface of the rim, which faces the outer peripheral surface, is movable relative to the rim in the rotational direction, and is coaxial with the outer side of the rim. And a plurality of ball holders that are arranged on the sensing ring at predetermined intervals in the circumferential direction of the sensing ring facing the ball groove. A plurality of balls that are held and fit into the ball groove, the root is fixed to the hub side, and the tip is extended to the sensing ring. And the gauge beam that, gauge the
It is located on the sensing ring in relation to the tip of the beam, and receives the tip of the gauge beam with a slight gap in the direction of rotation of the sensing ring to allow movement of the sensing ring to the gauge. In the direction of rotation, the connector that enables transmission to the beam, the displacement detection means attached to the gauge beam,
A spoke cover that is movable relative to the spoke and rim and is connected to the sensing ring,
Since the steering wheel of the present invention includes either one of its spokes and a centering device disposed between the spoke covers, the steering wheel has reduced inertia when a steering force is applied, and through the ball. The sensing ring, which is placed around the rim in rolling contact with the rim, is quickly responded to, and the sensing ring is moved relative to the rim and, when steering, The hysteresis of the sensor output is reduced to a very small value, unaffected by the large inertia of the rim and steering shaft, and its gauge beam and displacement detection means enable the steering force and its direction to be detected substantially without delay. It becomes possible to detect, that is, correct the power steering cut-off delay correction during steering. Steering force and its direction are made sensitive, and when the steering force is removed, the slight gap the connector gives to the gauge beam and its centering device provide a neutral for its sensor output. The return is positively improved, the neutral return failure is improved, and the dead zone for its sensor output is improved, which makes it very useful and practical for power steering used in vehicles.

[Brief description of drawings]

FIG. 1 is a front view showing a partial section of a specific example of a steering wheel of the present invention used for power steering of an automobile, and FIG. 2 is taken along line 2-2 of FIG. 3 is a sectional view taken along line 3-3 of FIG. 1, FIG. 4 is a partially enlarged view of the steering wheel shown in FIG. 1, and FIG. 1 and 4 are sectional views taken along line 5-5, FIG. 6 is a sectional view taken along line 6-6 of FIGS. 1 and 4, and FIG. 7 is sectional views 1 and 4. FIG. 7 is a sectional view taken along line 7-7 in FIG. 8 and FIG. 8 is a sectional view taken along line 8-8 in FIG. 14 …… Rim, 15 …… Sensing ring, 18,19,20 ……
Ball holder, 21,22,23 …… Ball, 24 …… Gauge ・
Beam, 25 ... Connector, 28 ... Centering device, 30 ... Outer surface, 31 ... Annular ball groove, 32 ... Beam escape.

Claims (4)

[Claims] 1. A spoke mounted on a steering shaft, a rim fixedly connected to the spoke and having an annular ball groove on an outer peripheral surface thereof, and an outer peripheral surface thereof at an appropriate distance from the outer peripheral surface. And a sensing ring that is arranged coaxially outside the rim so as to be movable relative to the rim in the rotational direction, and the sensing ring facing the ball groove. A steering wheel including a plurality of ball holders arranged on the sensing ring at predetermined intervals in the circumferential direction of the vehicle and a plurality of balls held by the ball holder and fitted in the ball grooves. 2. A spoke attached to a steering shaft, a rim fixedly connected to the spoke, and having an annular ball groove on an outer peripheral surface, and an outer peripheral surface provided with an appropriate interval from the outer peripheral surface. The sensing ring, which faces each other and is movable relative to the rim in the rotational direction, is coaxially arranged outside the rim, and the sensing ring facing the ball groove. A plurality of ball holders arranged on the sensing ring at predetermined intervals in the circumferential direction, a plurality of balls held by the ball holder and fitted in the ball groove, a rim thereof and the sensing ring. And a steering wheel including means for detecting relative displacement with respect to the steering wheel. 3. A spoke attached to a steering shaft, a rim fixedly connected to the spoke and having an annular ball groove on an outer peripheral surface, and an outer peripheral surface provided at an appropriate interval from the outer peripheral surface. The sensing ring, which faces each other and is movable relative to the rim in the rotational direction, is coaxially arranged outside the rim, and the sensing ring facing the ball groove. A plurality of ball holders arranged on the sensing ring at predetermined intervals in the circumferential direction, a plurality of balls held by the ball holder and fitted into the ball groove, and a base on the steering shaft side. The cage beam and extending the tip to its sensing ring, and its sensor in relation to the tip of the cage beam. Packaging -
A connector disposed on the ring and adapted to receive the tip of the gauge beam with a slight gap in the direction of rotation of the sensing ring and to transmit the movement of the sensing ring to the gauge beam; A steering wheel including displacement detection means attached to the gauge beam. 4. A rim having a hub attached to a steering shaft, a plurality of spokes protruding from the hub at predetermined intervals, fixedly connected between the spokes, and having an annular ball groove on an outer peripheral surface. And a sensing sensor which is opposed to the outer peripheral surface at an appropriate distance from the outer peripheral surface, is movable relative to the rim in the rotational direction, and is coaxially arranged on the outer side of the rim. A ring, a plurality of ball holders facing the ball groove and arranged on the sensing ring at predetermined intervals in the circumferential direction of the sensing ring, and the ball groove held by the ball holder. , A plurality of balls to be fitted to the hub, a gauge beam that fixes the root to the hub side, and extends the tip to the sensing ring, and the gauge・ Sensing related to the tip of the beam ・
A connector disposed on the ring and adapted to receive the tip of the gauge beam with a slight gap in the direction of rotation of the sensing ring and to transmit the movement of the sensing ring to the gauge beam; Displacement detecting means attached to the gauge beam, a spoke cover movably connected to the spoke and the rim in the rotational direction and connected to the sensing ring, and either one of the spokes and the spoke cover. A steering wheel including a centering device disposed therebetween.