JPH11264708A - Rotation angle detector - Google Patents

Abstract

(57) [Problem] To reduce the number of parts by providing a detection unit and an axis aligning unit between a body of a device and a rotor of a rotating shaft.
Improve reliability. A rotor (16) fixed to a rotating shaft (13) is provided in a rotor-side body (9) of an accelerator operation amount detecting device (8). Further, a sensor section 19 composed of a potentiometer and the like and an axis aligning section and a hiss generating section 23 are provided between the rotor 16 and the sensor side body 11, and the axis aligning section and the hiss generating section 23 slide with respect to each other. Concave spherical body side slope 12
And a rotor-side slope 18 having a convex spherical shape. When the accelerator pedal is operated, the rotating shaft 13
Rotates together with the rotor 16 against the return spring 22, and the rotation angle is detected by the sensor unit 19. At this time, the shaft aligning portion and hiss generating portion 23 adjusts the axial direction of the rotating shaft 13 with respect to the sensor-side body 11, and generates hysteresis with respect to the operation force of the accelerator pedal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation angle detecting device suitably used for detecting a rotation angle of a rotation shaft.
In particular, the present invention relates to a rotation angle detection device configured to adjust the axial direction of a rotation shaft using a biasing force of a spring or the like.

[0002]

2. Description of the Related Art Generally, as a turning angle detecting device for detecting a turning angle of a rotating body, an accelerator operation amount detecting device for detecting an operation amount of an accelerator pedal and the like are known (for example, Japanese Patent Application Laid-Open No. 9-272360). No.).

[0003] An accelerator operation amount detecting device of this type according to the related art includes a casing mounted on a vehicle side, a rotating shaft rotatably provided on the casing and connected to an accelerator pedal via a wire or the like. It comprises a return spring that urges the rotation axis in the direction in which the accelerator pedal returns, a sensor unit that detects the rotation angle of the rotation axis as an accelerator operation amount, a hysteresis generating mechanism for the accelerator pedal, and the like. .

Here, the return spring is disposed on the outer peripheral side of the rotating shaft via a tubular spring holding member or the like. Further, the sensor unit is composed of, for example, a potentiometer, and is provided with a resistor provided together with the sensor body on the casing side, and provided with a mounting member such as a brush holder on the rotating shaft side. And a rotating sliding brush.

Further, the hysteresis generating mechanism includes sliding plates provided on the casing side and the rotating shaft side, and a pressing spring and the like for pressing these sliding plates to make sliding contact with each other. Is rotated, the sliding plates slide against each other to apply a frictional resistance to the rotating shaft.

[0006] When the driver operates the accelerator pedal, the rotation shaft rotates by a rotation angle corresponding to the accelerator operation amount against the return spring. This allows
The sensor unit detects the rotation angle of the rotation shaft as a change in the resistance value of the resistor. Further, the hysteresis generating mechanism generates hysteresis with respect to the operation force of the accelerator pedal, and stabilizes the operation feeling.

[0007]

By the way, in the above-mentioned prior art, since the sensor section and the hysteresis generating mechanism are provided in the accelerator operation amount detecting device, for example, a sensor body, a resistor, a sliding brush, a brush holder and the like are provided. The number of parts of the accelerator operation amount detecting device is increased by the sensor portion having the above-mentioned structure and the hysteresis generating mechanism having the two sliding plates, the pressing springs, etc., which not only complicates the structure of the entire device, but also assembles the device. There is a problem that work is troublesome.

Further, since the sensor section and the hysteresis generating mechanism are provided between the casing and the rotating shaft,
For example, when the relative position between the rotating shaft and the casing fluctuates due to a dimensional error of the casing or the like, the resistive element of the sensor unit and the sliding brush are displaced, and the detecting operation of the rotating angle becomes unstable. In addition, there is also a problem that the pressing force of the pressing spring acting on each sliding plate of the hysteresis generating mechanism becomes uneven, and the sliding plate is liable to be unevenly worn.

The present invention has been made in view of the above-mentioned problems of the prior art, and the present invention can surely reduce the number of components of the entire apparatus, simplify the structure, and increase the efficiency of assembly work. It is another object of the present invention to provide a rotation angle detection device capable of stably operating a sensor and the like.

[0010]

According to a first aspect of the present invention, there is provided a rotor-side body formed with an opening in a rotor accommodating chamber, and a rotor-side body in a state in which the rotor accommodating chamber is closed. A sensor-side body fixedly provided on the opening side of the side-body; and a piece rotatably supported by one of the sensor-side body and the rotor-side body and arranged with a gap between the other. A rotating shaft, which is provided on the outer peripheral side of the rotating shaft and located in the rotor accommodating chamber,
A rotor that rotates about the axis of the rotation shaft, and a rotation angle that is provided between the rotor and the sensor-side body when the rotor relatively rotates with respect to the sensor-side body. And a spring provided between the rotor and the rotor, the spring is provided between the rotor and the rotor, and is provided between the rotor and the sensor. And a shaft aligning portion that adjusts the axial direction of the rotation shaft with respect to the sensor-side body by the biasing force of a spring.

With this configuration, when the rotor rotates around the rotation axis, the rotation angle can be detected by the sensor unit. Also, for example, only one end of the rotating shaft can be supported by the rotor side body, and in this state, the axis aligning portion adjusts the axial direction of the rotating shaft with respect to the sensor side body by the urging force of the spring, and the rotor and the sensor The side body can be disposed at a predetermined relative position.

Further, in the invention according to claim 2, the shaft centering portion is provided on the rotor so as to surround the rotation shaft, and extends in the axial direction from the outer peripheral side of the rotor, and extends along the axis of the rotation shaft. A rotor-side slope portion inclined in a radial direction toward the rotor-side slope portion provided on the sensor-side body corresponding to the rotor-side slope portion and slidably in contact with the rotor-side slope portion by the biasing force of the spring. Make up.

Thus, the rotor side slope can be brought into sliding contact with the body side slope by using the biasing force of the spring. The biasing force at this time can be applied radially inward to the outer peripheral side of the rotor by the rotor side slope portion and the body side slope portion, and the biasing force is applied to the rotor at a position surrounding the rotation shaft. Thus, the axial direction of the rotation shaft can be adjusted.

Further, according to the third aspect of the present invention, the rotor side slope portion and the body side slope portion of the shaft centering portion provide a hysteresis for imparting a rotational resistance to the rotor by the biasing force of the spring. It constitutes a generator.

Thus, the hysteresis generating section can generate a frictional resistance between the rotor side slope and the body side slope using the biasing force of the spring, and the external force for rotating the rotor by the frictional resistance can be generated. Can be given a hysteresis.

According to the fourth aspect of the invention, one of the rotor-side slope and the body-side slope is formed in a convex spherical shape around a predetermined point on the axis of the rotation shaft. The other of the rotor-side slope and the body-side slope is formed in a concave spherical shape corresponding to the convex spherical slope.

Thus, the rotor-side slope and the body-side slope can be brought into sliding contact with each other along the same spherical surface. As a result, the center of the spherical surface of the rotor side slope and the center of the spherical surface of the body side slope can be matched with each other by the biasing force of the spring, and the axial direction of the rotation shaft can be adjusted with respect to the sensor side body.

On the other hand, according to the invention of claim 5, the rotor body is formed with the rotor housing chamber opened, and the rotor body is fixed to the opening side of the rotor body with the rotor housing chamber closed. A sensor-side body, a rotating shaft extending along a predetermined axis between the sensor-side body and the rotor-side body, and a rotating shaft located in the rotor housing chamber and provided on an outer peripheral side of the rotating shaft. A rotor that rotates about the axis of the rotation shaft, a movable body movably provided in the axial direction of the rotation shaft in a state where rotation with respect to the rotor is restricted, the sensor-side body and the rotor, A sensor unit provided between the rotor-side body and the movable body for detecting a rotation angle when the rotor is relatively rotated with respect to the sensor-side body; To the sensor-side body. A configuration including a spring and a hysteresis generating unit provided between the sensor-side body and the movable body and provided with a resistance between the sensor-side body and the movable body by the urging force of the spring is adopted. .

Thus, the movable body can be displaced with respect to the rotor so as to be inclined from the axis of the rotating shaft while being biased by the spring, and the biasing force received from the spring is made uniform between the movable body and the sensor-side body. Can be
When the rotor rotates together with the movable body, the hysteresis generating section can generate a resistance force between the movable body and the sensor-side body in the rotating direction of the rotor.

Further, in the invention according to claim 6, the movable body comprises a movable ring which is arranged on the outer peripheral side of the rotor and whose axial end side is in sliding contact with the sensor-side body. A female fitting portion is provided on the peripheral side, and a male fitting portion fitted to the female fitting portion is provided on the outer peripheral side of the rotor.

Thus, the movable ring can be mounted so as to be displaceable so as to be inclined toward the outer peripheral side of the rotor via the male fitting portion and the female fitting portion, and in this state, the movable ring is attached to the rotor. Rotation can be restricted.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rotation angle detecting device according to an embodiment of the present invention will be described in detail with reference to FIGS.

FIGS. 1 to 6 show a first embodiment according to the present invention. In this embodiment, an accelerator operation amount detecting device for an automobile or the like will be described as an example.

An accelerator device 1 is provided on a vehicle such as an automobile. The accelerator device 1 includes a mounting bracket 3 mounted on a vehicle body 2 and a mounting bracket 3 having a connecting pin 4 at a middle portion in a longitudinal direction. 3, a pedal stay 5 rotatably mounted on the upper end side of the pedal stay 5, which is engaged with a rotating lever 14 via a roller 15 described below, an accelerator pedal 6 fixed to a lower end side of the pedal stay 5, and a mounting bracket 3. And a later-described accelerator operation amount detection device 8 fixed via a bolt 7 or the like.

Then, the driver of the vehicle operates the accelerator pedal 6.
1 is depressed in the direction of arrow A in FIG.
The operation angle of the rotation shaft 13 is detected by the accelerator operation amount detection device 8 as the operation amount of the accelerator pedal 6 (accelerator operation amount).

Reference numeral 8 denotes an accelerator operation amount detection device as a rotation angle detection device according to the present embodiment. The accelerator operation amount detection device 8 includes, as shown in FIG. , A rotary shaft 13, a rotor 16, a sensor unit 19, a return spring 22, an axis aligning unit and a hiss generating unit 23, and the like.

Reference numeral 9 denotes a rotor-side body formed into a bottomed cylindrical shape with, for example, a resin material.
As shown in FIG. 2, the rotor comprises a cylindrical portion 9A, a bottom portion 9B, and the like. On the bottom 9B of the rotor-side body 9, a cylindrical support 9C for supporting the rotating shaft 13 and a spring holding cylinder 9D are formed.

Reference numeral 11 denotes a resin-made sensor-side body fixed to the cylindrical portion 9A of the rotor-side body 9. The sensor-side body 11 has a substantially disc-shaped lid for closing the opening side of the cylindrical portion 9A. An annular sliding projection that projects into the rotor housing 10 from the outer periphery of the lid part 11A, facing the sliding part 16A of the rotor 16 and the sliding projection 16C of the rotor 16; 11B, and a connector 21 and the like described later.

Here, the outer periphery of the sliding projection 11B is fixed to the opening side of the cylindrical portion 9A over the entire circumference by fixing means such as caulking, welding, bonding or the like.
In the center of the lid 11A, an insertion hole 11 for the rotating shaft 13 is provided.
C is formed.

Reference numeral 12 denotes a concave spherical body-side slope portion constituting the axis aligning portion and hissing portion 23. The body-side slope portion 12
As shown in FIG. 2, is formed along the same spherical surface as the later-described rotor-side slope portion 18, and is provided over the entire periphery on the tip side of the sliding protrusion 11 </ b> B of the sensor-side body 11.

Numeral 13 denotes a cantilever type rotating shaft extending in the axial direction inside the rotor accommodating chamber 10, and the rotating shaft 13 is provided in FIGS.
As shown in the figure, one side in the axial direction is rotatably supported by the support portion 9C of the rotor side body 9, the other end side is inserted into the insertion hole 11C of the sensor side body 11 with a gap S1, and the axis O1-O1. And the rotor 16 is rotated integrally with the rotor 16. One end of the rotating shaft 13 protrudes outside the rotor-side body 9, and a rotating lever 14 is fixed to the protruding end side together with the roller 15 so as not to rotate.

Reference numeral 16 denotes a resin rotor rotatably accommodated in the rotor accommodating chamber 10.
3 and a cylindrical flange 1A radially protruding from the outer periphery of the other end of the body 16A.
6B, and an annular sliding projection 16C surrounding the sensor section 19 and protruding from the outer periphery on the distal end side of the flange section 16B toward the sensor-side body 11.

The body 16A and the flange 16B form an annular spring accommodating space 17 between the cylinder 9A, the bottom 9B, and the spring holding cylinder 9D of the rotor side body 9. The flange 16B of the rotor 16 and the sliding protrusion 16
A radial gap S2 is formed between C and the cylindrical portion 9A of the rotor side body 9.

Reference numeral 18 denotes a rotor-side slope having a convex spherical shape which constitutes the shaft centering portion and the hiss generator 23.
As shown in FIG. 2, is provided over the entire circumference on the tip side of the sliding protrusion 16C of the rotor 16. Further, the rotor side slope portion 18 is formed along a spherical surface C having a predetermined point on the axis O1 -O1 of the rotating shaft 13 as a center O2. It is arranged within a range L in the axial direction where the support portion 9C of the side body 9 abuts.

Then, the rotor side slope portion 18 is
6 extends in the axial direction from the outer peripheral side in the biasing direction of the return spring 22 and inclines in the radial direction toward the axis O1 -O1 of the rotating shaft 13, and the biasing force of the return spring 22 causes the body-side slope 12 and Is in sliding contact.

Numeral 19 denotes a sensor section comprising a potentiometer and the like provided between the rotor 16 and the sensor-side body 11, and the sensor section 19 is, as shown in FIGS. 19B, which is provided via a substrate 19A and extends in the rotation direction of the rotor 16.
And a conductive sliding brush 19C or the like fixed to the body 16A of the rotor 16, and the resistor 19B is connected to the terminal 21A of the connector 21 via the bonding wire 20 and the like.

When the rotor 16 rotates,
At a position corresponding to the rotation angle, the sliding brush 19 </ b> C
9B, the sensor unit 19 detects a change in the resistance value of the resistor 19B on the connector 21 side as the rotation angle of the rotor 16.

Reference numeral 22 denotes a return spring disposed between the bottom 9B of the rotor side body 9 and the flange 16B of the rotor 16. The return spring 22 is housed in the spring housing space 17 as shown in FIG. Have been. Then, the return spring 22 urges the rotor 16 in a direction opposite to the direction of arrow B in FIG. 1 with respect to the rotation direction, and slides the sliding protrusion 16C across the flange 16B of the rotor 16 on the sensor side body. 11 sliding protrusion 11B.

Numeral 23 denotes an axis aligning portion and a hysteresis generating portion (hereinafter, referred to as a “hysteresis generating portion”) provided between the rotor side body 9 and the rotor 16.
As shown in FIG. 3, the shaft aligning portion and hiss generating portion 23 includes a body-side slope 12 and a rotor-side slope 18.

The axis aligning portion and hiss generating portion 23 radially urges the outer peripheral side of the rotor 16 toward the center O 2 of the rotor side slope portion 18 by the urging force of the return spring 22, and rotates the rotating shaft. 13 is adjusted with respect to the sensor-side body 11 as described later. The axis aligning portion and hiss generating portion 23 gives a frictional resistance in the rotating direction of the rotor 16 by the urging force of the return spring 22, and
Hysteresis is generated with respect to the operation force.

The accelerator device 1 according to the present embodiment has the above-described configuration, and its operation will be described next.

First, in FIG. 1, when the driver depresses the accelerator pedal 6, when the pedal stay 5 is turned around the connecting pin 4 in the direction of arrow A, the turning lever 14 is moved to the return spring 22. It turns in the direction of arrow B in opposition. Accordingly, in FIG. 2, the rotation shaft 13 of the accelerator operation amount detection device 8 rotates together with the rotor 16, and the rotation angle is detected by the sensor unit 19 as the accelerator operation amount.

When the driver releases the operation of the accelerator pedal 6, the turning lever 14 is turned in the direction opposite to the direction of arrow B by the urging force of the return spring 22, and the pedal stay 5 is moved together with the accelerator pedal 6. It turns in the direction opposite to the arrow A direction.

Here, the urging force of the return spring 22 which urges the shaft aligning portion and the hissing portion 23 in the axial direction is shown in FIG.
As shown in the figure, a part of the central force F acts radially inward toward the center O2 of the spherical surface C by the body-side slope portion 12 and the rotor-side slope portion 18, and this center force F is applied to the outer periphery of the rotor. It occurs over the entire circumference.

Thus, the direction of the axis O 1 -O 1 of the rotating shaft 13 is adjusted so that the center O 2 of the rotor side slope portion 18 coincides with the center of the body side slope portion 12. That is, if the rotating shaft 13 is slightly inclined with respect to the sensor-side body 11 and the like, the rotating shaft 13 is supported on one side in the axial direction by the rotor-side body 9 and on the other side in the axial direction. Due to the central force F, the rotor 16 is slightly displaced in the radial direction together with the rotor 16. As a result, the rotor 16 maintains a predetermined relative position with respect to the sensor-side body 11.

The body-side slope 12 and the rotor-side slope 18 slide while being pressed by the return spring 22 when the rotating shaft 13 rotates. 13, a frictional resistance is generated in the rotating direction. The frictional resistance generates a hysteresis with respect to the operation force of the accelerator pedal 6.

On the other hand, if the resistor 19B
When the sliding brush 19C and the sliding brush 19C are retracted, the sliding protrusions 11B and 16C are almost similarly worn, and the rotor 16 is slightly displaced toward the sensor-side body 11 by the urging force of the return spring 22. . This allows
The resistor 19B of the sensor section 19 and the sliding brush 19C are relatively close to each other by the size of the retreated wear, and their contact state (pressure) is maintained substantially constant by the return spring 22.

Thus, in the present embodiment, the accelerator operation amount detecting device 8 is combined with the rotor-side body 9, the sensor-side body 11, the rotating shaft 13, the rotor 16, the sensor unit 19, the return spring 22, and the shaft aligning unit. Since it is constituted by the hysteresis section 23 and the like, it is not necessary to separately provide a sensor body for the sensor section, a brush holder, and each sliding plate of the hysteresis generation mechanism as in the prior art. , And the return spring of the prior art and the pressing spring of the hysteresis generating mechanism can be shared.

As a result, the number of parts of the entire apparatus can be reliably reduced, the structure can be simplified, and the assembling work of the accelerator device 1 and the accelerator operation amount detecting device 8 can be performed efficiently.

The rotating shaft 13 is supported only on one side in the axial direction by the support portion 9C of the rotor side body 9, and the shaft aligning portion and hissing portion 23 are formed on the concave spherical body side slope 12 and the convex spherical surface. And the rotor-side slope portion 18,
The outer peripheral side of the inner surface 6 has a spherical surface C from the body-side slope 12 and the rotor-side slope 18 by the urging force of the return spring 22.
A central force F acting inward in the radial direction toward the center O2.

The axis O is adjusted so that the center O 2 of the rotor side slope 18 coincides with the center of the body side slope 12.
The direction of 1-O1 can be appropriately adjusted with respect to the sensor-side body 11, and the rotor 16 can be stably held at a predetermined relative position with respect to the sensor-side body 11.

As a result, as compared with a configuration in which the rotating shaft 13 is supported on both axial sides by the rotor-side body 9 and the sensor-side body 11, for example,
The axial alignment and hiss generating portion 23 can reliably prevent the axial direction of the rotation shaft 13 from being displaced so as to be inclined due to a dimensional error of the sensor-side body 11 or the like.

Therefore, the resistor 19B of the sensor section 19 and the sliding brush 19C can be abutted with high accuracy, and these can be stably brought into sliding contact with each other.
It is not necessary to provide a support portion or the like for the rotating shaft 13 in 1,
Durability and reliability can be improved.

In this case, the center O2 of the rotor side slope 18 is
Is set within the axial range L where the rotating shaft 13 and the supporting portion 9C of the rotor side body 9 abut, so that the central force F by the return spring 22 acts on the supporting portion of the rotating shaft 13. Accordingly, even when the central force F is applied, the rotating shaft 13 can be stably supported by the support portion 9C of the rotor side body 9.

The axis aligning portion for adjusting the axial direction of the rotating shaft 13 and a hysteresis generating portion for giving a hysteresis to the operation force of the accelerator pedal 6 are shared by the axis aligning portion and the hysteresis generating portion 23. These can be urged by a single return spring 22, and the structure of the shaft aligning portion and hiss generating portion 23 can be further simplified.

Further, the shaft aligning portion and hiss generating portion 23 can slide the body side slope portion 12 and the rotor side slope portion 18 in a stable state by adjusting the axial direction of the rotating shaft 13. Thus, the urging force of the return spring 22 can be made uniform over the entire sliding surface.
Thereby, the body side slope 12 and the rotor side slope 18
Can be reliably prevented from being unevenly worn, and a stable hysteresis can be generated with respect to the operating force of the accelerator pedal 6 by the shaft aligning portion and the hysteresis generating portion 23.

Further, since the annular spring accommodating space 17 is formed between the rotor side body 9 and the rotor 16, the return spring 22 can be stably accommodated in the spring accommodating space 17, and the return spring 22 can be bent and positioned. Displacement and the like can be reliably prevented, and the conventional spring holding member and the like can be omitted.

Further, the lid 11A of the sensor side body 11
The sliding protrusion 11 is provided between the rotor 16 and the body 16A of the rotor 16.
Since the sensor section 19 is disposed at a position surrounded by B and 16C, the sensor section 19 and the axis aligning section and hiss generating section 23 can be disposed at substantially the same position in the axial direction. 8 can surely be downsized.

Further, since the urging force of the return spring 22 is also applied to the sensor portion 19, even if the resistor 19B and the sliding brush 19C of the sensor portion 19 are worn and receded, they are slid. The protrusions 11B and 16C can be relatively approached by using wear. Thus, the contact pressure between the resistor 19B and the sliding brush 19C can be maintained at a substantially constant level by the return spring 22, and the detection operation of the sensor unit 19 can be stabilized for a long period of time.

On the other hand, since the annular sliding projection 11B is provided on the sensor side body 11, when the accelerator operation amount detecting device 8 is assembled, the sliding projection 11B is fitted into the cylindrical portion 9A of the rotor side body 9. , Sensor side body 1
1 can be accurately positioned with respect to the rotor-side body 9, and it is possible to reliably prevent the resistor 19B of the sensor unit 19 and the sliding brush 19C from being displaced in the radial direction during assembly.

Next, FIGS. 7 and 8 show a second embodiment according to the present invention.
In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. However, the feature of the accelerator operation amount detection device 31 according to the present embodiment is that
4 has a movable ring 35.

Here, the accelerator operation amount detecting device 31
Accelerator operation amount detecting device 8 according to the first embodiment
The rotor side body 9 and the sensor side body 3
2. It comprises a rotating shaft 13, a rotor 34, a sensor unit 19, a return spring 22, and the like.

The sensor-side body 32 includes a substantially disk-shaped lid 32A, an annular sliding protrusion 32B, a connector 33, and the like, in substantially the same manner as the sensor-side body 11 according to the first embodiment. It is configured. However, in the center of the lid portion 32A, a bottomed cylindrical support portion 32C that rotatably supports the other end of the rotation shaft 13 is formed. The distal end surface of the sliding protrusion 32B is a flat sliding surface for the movable ring 35.

Further, the rotor 34 is formed in a stepped cylindrical shape having a large diameter portion 34A with which the return spring 22 abuts and a small diameter portion 34B on which the sliding brush 19C of the sensor portion 19 is provided. 13 is fixed to the outer peripheral side. As shown in FIG. 8, on the outer peripheral side of the small diameter portion 34B, a male spline groove 34C as a male fitting portion extending in the axial direction is formed at intervals in the circumferential direction.

A movable ring 35 as a movable body is provided on the outer peripheral side of the small diameter portion 34B. On the inner peripheral side of the movable ring 35, a female fitting portion which meshes with the male spline groove 34C of the rotor 34 is provided. Female spline groove 35A is provided. Here, a constant gap is formed between the male spline groove 34C and the female spline groove 35A in the circumferential direction and the radial direction, and the gap is formed between the rotor 34 and the movable ring 3A.
5 to provide play in the circumferential and radial directions.

As a result, the movable ring 35 is
4 is disposed so as to be displaceable so as to be inclined from the axis O1-O1 of the rotating shaft 13, and the rotation with respect to the rotor 34 is restricted.

Further, the other side surface of the movable ring 35 in the axial direction is in sliding contact with the distal end surface of the sliding protrusion 32 B of the sensor side body 32 by the urging force of the return spring 22.
These sliding surfaces constitute a hysteresis generating section 36 that applies a frictional resistance to the rotating shaft 13 in the rotating direction.

Further, between the bottom 9B of the rotor side body 9 and the large diameter portion 34A of the rotor 34, the contact pressure between the resistor 19B of the sensor 19 and the sliding brush 19C is maintained at a substantially constant level. A holding spring 37 is provided.

Thus, also in the present embodiment having such a configuration, it is possible to obtain substantially the same operation and effect as in the first embodiment. And especially in this embodiment,
Since the movable ring 35 is provided on the outer peripheral side of the rotor 34, even if the rotating shaft 13 is slightly inclined with respect to the sensor-side body 11, the movable ring 35 is moved along the axis O1 of the rotating shaft 13. It can be displaced with respect to the rotor 34 so as to be inclined from -O1, whereby the inclination of the rotating shaft 13 can be compensated.

Therefore, the entire sliding surface between the movable ring 35 and the sensor-side body 32 can always be stably brought into sliding contact with each other, and these contact pressures can be maintained uniformly, and the operating force of the accelerator pedal 6 can be reduced. Thus, the hysteresis generation section 36 can generate stable hysteresis.

In the first embodiment, the shaft centering portion and hissing portion 23 are constituted by the body-side slope 12 and the rotor-side slope 18. However, the present invention is not limited to this.
The axis aligning portion and the hiss generating portion 23 are connected to the axis O1-O of the rotating shaft 13.
1 It may be configured to be formed in a tapered shape along a conical surface having a vertex on the top.

In the first embodiment, the cantilever type rotating shaft 13 is supported by the supporting portion 9C of the rotor side body 9, but the present invention is not limited to this. 13 may be supported by a support portion or the like provided on the sensor-side body 11.

Further, in each of the above embodiments, the return spring 22 is accommodated in the rotor side body 9. However, the present invention is not limited to this. For example, the return spring for the accelerator pedal 6 may be replaced with the accelerator device 1. The rotor 1 is provided on the mounting bracket 3 and the like.
6. Another spring may be provided to urge the movable ring 35 toward the sensor-side bodies 11, 32.

In each of the above embodiments, the sensor unit 1
9 is provided on the sensor-side bodies 11 and 32,
Although the sliding brush 19C is provided on the rotors 16 and 34, the present invention is not limited to this.
6 and 34, and the sliding brush 19C is attached to the sensor side body 1
It is good also as composition provided in 1,32.

Further, in each of the above embodiments, the contact type sensor unit 19 composed of a potentiometer or the like is provided in the accelerator operation amount detecting devices 8 and 31, but the present invention is not limited to this. Alternatively, a non-contact type sensor unit may be configured by an electromagnetic pickup using a Hall element or the like or an optical pickup using a photocoupler or the like, and the sensor unit may be provided in the accelerator operation amount detection devices 8 and 31.

On the other hand, in the second embodiment, a male spline groove 34C is provided on the outer peripheral side of the rotor 34 as a male fitting portion, and a female spline groove 35A is provided on the inner peripheral side of the movable ring 35 as a female fitting portion. Although the present invention is not limited to this, the present invention is not limited to this. For example, the male fitting portion and the female fitting portion may be configured to use a key groove, an intaglio fitting, or the like.
The outer peripheral side shape of the movable ring 35 and the inner peripheral side shape of the movable ring 35 may be formed in a non-circular shape such as a D-shape.

In each of the above embodiments, the rotating shaft 13
Is connected to the pedal stay 5 of the accelerator pedal 6 using the rotating lever 14 or the like. However, the present invention is not limited to this. For example, a wire drum or the like is provided on the rotating shaft 13 instead of the rotating lever 14. The wire drum and the pedal stay 5 may be connected by a wire or the like, and the rotating shaft 13 may be rotated by the wire in accordance with the operation amount of the accelerator pedal 6.

Further, in each of the above embodiments, the case where the rotation angle detecting device is used as the accelerator operation amount detecting device 8 has been described as an example. However, the present invention is not limited to this, and the rotation of any rotating body is You may apply to the rotation angle detection apparatus which detects a moving angle.

[0079]

As described in detail above, according to the first aspect of the present invention, the rotation angle detecting device is constituted by the rotor side body, the sensor side body, the rotation shaft, the rotor, the sensor section, the spring, and the shaft centering section. With this configuration, the sensor section and the shaft centering section can be arranged between the rotor and the sensor-side body, and these mounting members and the like can be shared by the sensor-side body and the rotor. As a result, the number of components can be reliably reduced as compared with the related art, the structure can be simplified, the entire apparatus can be reduced in size, and the assembling operation can be performed efficiently. In addition, by using the cantilevered rotation shaft, the axial direction can be appropriately adjusted with respect to the sensor side body by the shaft centering portion, and the rotor can be held at a predetermined relative position with respect to the sensor side body. In addition, the sensor section and the like provided between them can be operated stably, and the reliability can be reliably improved.

According to the second aspect of the present invention, since the shaft centering portion is constituted by the rotor-side slope portion and the body-side slope portion which are in sliding contact with each other, the biasing force of the spring is controlled by the shaft centering portion. It can be made to act radially inward on the side, and the axial direction of the rotation shaft can be reliably adjusted with respect to the sensor-side body by the biasing force.

Further, according to the third aspect of the present invention, since the rotor side slope portion and the body side slope portion of the shaft centering portion constitute the hysteresis generating portion, the shaft centering portion and the hysteresis generating portion are shared. It is possible to further simplify these structures. In addition, the contact pressure between the rotor-side slope and the body-side slope due to the biasing force of the spring can be made uniform over the entire sliding surface, and stable hysteresis can be generated against external rotating power and the like. .

According to the fourth aspect of the present invention, since the rotor-side slope and the body-side slope are formed in a convex spherical shape and a concave spherical shape, the spring biasing force is applied to the outer peripheral side of the rotor. Thus, for example, a central force acting radially inward toward the center of the spherical surface of the rotor-side slope can be given.
Thus, the axial direction of the rotation shaft can be appropriately adjusted with respect to the sensor-side body so that the spherical centers of the rotor-side slope portion and the body-side slope portion coincide.

Further, according to the fifth aspect of the present invention, the rotation angle detecting device includes a rotor side body, a sensor side body, a rotation shaft,
Since the rotor, the movable body, the sensor section, the spring, and the hysteresis generating section are configured, even if the rotation axis is slightly inclined with respect to the sensor-side body, the movable body is inclined from the axis of the rotation axis. At the same time, the inclination of the rotating shaft can be compensated. Therefore, the movable body and the sensor-side body can always be in sliding contact with each other stably, and the contact pressure can be uniformly maintained over the entire sliding surface, and hysteresis is generated with respect to external rotating power and the like. A stable hysteresis can be generated by the portion.

According to the sixth aspect of the present invention, since the movable ring is provided on the outer peripheral side of the rotor via the male fitting portion and the female fitting portion, for example, the inclination of the rotating shaft is compensated. Therefore, the movable ring can be displaced so as to be inclined with respect to the rotor. In this state, the movable ring can be slid with the sensor-side body while being rotated together with the rotor by the spline. Thereby, a resistance for hysteresis can be stably generated between the movable ring and the sensor-side body.

[Brief description of the drawings]

FIG. 1 is an external view showing an accelerator device to which an accelerator operation amount detection device according to a first embodiment of the present invention is applied.

FIG. 2 is a longitudinal sectional view showing an accelerator operation amount detection device according to the first embodiment.

FIG. 3 is an enlarged view of a main part in FIG. 2 showing a sensor unit, an axis aligning unit and a hiss generating unit, etc. of the accelerator operation amount detecting device.

FIG. 4 is an enlarged front view showing a body-side slope portion, a resistor, and the like provided on a sensor-side body.

FIG. 5 is an enlarged front view showing a rotor-side slope portion, a sliding brush, and the like provided on the rotor.

FIG. 6 is an exploded perspective view showing the accelerator operation amount detection device in an enlarged manner.

FIG. 7 is a longitudinal sectional view showing an accelerator operation amount detection device according to a second embodiment.

FIG. 8 is an exploded perspective view showing the rotor and the movable ring in FIG. 7 in an enlarged manner.

[Explanation of symbols]

8, 31 Accelerator operation amount detection device (rotation angle detection device) 9 Rotor side body 10 Rotor accommodation chamber 11, 32 Sensor side body 12 Body side slope 13 Rotation shaft 16, 34 Rotor 18 Rotor side slope 19 Sensor 19B Resistor 19C Sliding brush 22 Return spring (spring) 23 Axis aligning portion and hissing portion (axial aligning portion, hysteresis generating portion) 34C Male spline groove (male fitting portion) 35 Movable ring (movable body) 35A Female spline groove (female fitting part) 36 Hysteresis generating part O1-O1 axis

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaaki Aoki 1370 Onna, Atsugi-shi, Kanagawa Pref.

Claims (6)

[Claims] A rotor-side body formed with an opening in a rotor housing; a sensor-side body fixedly provided on an opening side of the rotor-side body in a state in which the rotor housing is closed; A cantilevered rotation shaft rotatably supported by one of the side body and the rotor side body and disposed with a gap between the other side body and the rotor side body; A rotor provided on an outer peripheral side of a shaft and rotating about an axis of the rotating shaft; and a rotor provided between the rotor and the sensor-side body, the rotor being relatively to the sensor-side body. A sensor unit for detecting a rotation angle at the time of rotation; a spring provided between the rotor-side body and the rotor, for urging the rotor toward the sensor-side body; and a sensor-side body and a rotor. And is provided between A rotation angle detecting device comprising: a shaft aligning portion that adjusts an axial direction of the rotation shaft with respect to the sensor-side body by a biasing force of a spring. 2. The shaft centering portion is provided on the rotor so as to surround the rotation shaft, and extends in the axial direction from the outer peripheral side of the rotor and is inclined in the radial direction toward the axis of the rotation shaft. 2. A rotor-side slope portion, and a body-side slope portion provided on the sensor-side body corresponding to the rotor-side slope portion and slidably contacting the rotor-side slope portion by the biasing force of the spring. 3. The rotation angle detection device according to 1. 3. The rotor-side slope portion and the body-side slope portion of the shaft centering portion constitute a hysteresis generating portion that applies a resistance in a rotating direction to the rotor by the biasing force of the spring. The rotation angle detection device according to claim 1. 4. One of the rotor-side slope portion and the body-side slope portion is formed in a convex spherical shape around a predetermined point on the axis of the rotating shaft, and the rotor-side slope portion is formed. 4. The rotation angle detecting device according to claim 3, wherein one of the other and the body-side slope portion is formed in a concave spherical shape corresponding to the convex spherical slope portion. 5. A rotor-side body formed by opening a rotor housing chamber, a sensor-side body fixed to an opening side of the rotor-side body in a state where the rotor housing chamber is closed, and the sensor A rotating shaft extending along a predetermined axis between a side body and the rotor-side body; an axial line of the rotating shaft provided in an outer peripheral side of the rotating shaft and located in the rotor accommodating chamber. A rotor that rotates about the same; a movable body that is movably provided in the axial direction of the rotation shaft in a state in which rotation with respect to the rotor is regulated; a rotor that is provided between the sensor-side body and the rotor; A sensor unit for detecting a rotation angle when the rotor relatively rotates with respect to the sensor-side body; and a sensor unit provided between the rotor-side body and the movable body, with the movable body facing the sensor-side body. A spring that biases the It is provided between the capacitors side body and the movable body, the hysteresis generator to become configured from rotational angle detecting device which gives resistance between the sensor-side body and the movable body by the biasing force of the spring. 6. The movable body comprises a movable ring disposed on the outer peripheral side of the rotor and having an axial end slidably contacting the sensor-side body, and a female fitting on an inner peripheral side of the movable ring. The rotation angle detecting device according to claim 5, wherein a portion is provided, and a male fitting portion fitted to the female fitting portion is provided on an outer peripheral side of the rotor.