JP3466464B2 - Rotation angle detector - Google Patents

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 preferably used for detecting a rotation angle of a rotating body,
In particular, for example, the present invention relates to a rotation angle detection device configured to detect an operation amount of an accelerator pedal or the like provided in a vehicle as a rotation angle of a rotor or the like and give hysteresis to the operation force.

[0002]

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

An accelerator operation amount detecting device according to the prior art of this kind is a casing mounted on a vehicle side, and a pivoting member provided rotatably on the casing and connected to an accelerator pedal via a wire, a wire drum or the like. Shaft, a return spring for urging the rotation shaft in the return direction of the accelerator pedal, a sensor unit for detecting the rotation angle of the rotation shaft as an accelerator operation amount, and hysteresis for the operation force of the accelerator pedal. It is composed of a hysteresis generation mechanism and the like.

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

Further, the hysteresis generating mechanism comprises a sliding plate provided on each of the casing side and the rotating shaft side, and a pressing spring for pressing these sliding plates into sliding contact with each other. When is rotated, the sliding plates slide with each other to give a frictional resistance force to the rotating shaft.

When the driver operates the accelerator pedal, the rotating shaft is pulled through a wire or the like, and at this time, the rotating shaft rotates against the return spring by a rotating angle corresponding to the accelerator operation amount. Move. As a result, the sensor unit detects the rotation angle of the rotation shaft as a change in the resistance value of the resistor,
A detection signal corresponding to the accelerator operation amount is output to a control unit or the like for engine control.

Further, when the accelerator pedal is operated, a hysteresis resistance mechanism gives a frictional resistance force to the rotating shaft, and this frictional resistance force releases the operation force and the accelerator operation when the accelerator pedal is depressed. A hysteresis is generated with the operating force (reaction force from the accelerator pedal) at that time. As a result, the driver can stably operate the accelerator pedal.

[0008]

By the way, in the above-mentioned prior art, since the accelerator operation amount detecting device is provided with the sensor portion and the hysteresis generating mechanism, for example, the sensor body, the resistor, the sliding brush, and the brush holder. And the like, and the hysteresis generation mechanism having two sliding plates, pressure springs, etc., increase the number of parts of the accelerator operation amount detection device, complicating the structure of the entire device and assembling it. There is a problem that the work is troublesome.

Further, since the sensor section and the hysteresis generating mechanism are provided between the casing and the rotating shaft,
The sensor unit and the hysteresis generating mechanism have to be arranged at different axial positions with respect to the rotating shaft, which poses a problem that it is difficult to reduce the axial size of the entire apparatus.

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 parts related to the sensor section and the hysteresis generating section, simplify the structure thereof, and at the same time, provide the device. It is an object of the present invention to provide a rotation angle detecting device which can be downsized in the entire axial direction and can be efficiently assembled.

[0011]

In order to solve the above-mentioned problems, the invention of claim 1 is directed to a rotor-side body formed by opening a rotor accommodating chamber, and the rotor accommodating chamber with the rotor accommodating chamber closed. a sensor-side body provided fixedly on the opening side of the side body, the housed rotatably in the rotor housing chamber of the rotor-side body, and b <br/> over data that will be rotated by the rotation shaft, A sensor unit provided between the rotor and the sensor-side body for detecting a rotation angle when the rotor rotates relative to the sensor-side body; and a rotor-side body and a rotor. is provided between a spring for biasing said rotor to said sensor-side body, said sensor
A hysteresis generating portion that is located radially outward of the sensor portion and is provided between the sensor-side body and the rotor, and that applies a resistance force between the sensor-side body and the rotor by the biasing force of the spring. Has been adopted.

With this structure, the sensor portion and the hysteresis generating portion can be arranged between the rotor and the sensor side body. When the rotor rotates, the rotation angle can be detected by the sensor unit, and at this time, the hysteresis generating unit can apply a resistance force in the rotation direction to the rotor by the biasing force of the spring.

Further, in the invention of claim 2, an annular spring accommodating space is formed between an outer peripheral surface of the rotor accommodating chamber of the body on the rotor side and an outer peripheral surface of the rotor, and the spring is formed in the spring accommodating space. And a coil spring disposed between the rotor-side body and the rotor.

Thus, the coil spring can be housed in the spring housing space, and the rotor can be axially biased by the coil spring from the rotor side body toward the sensor side body. Further, by using this coil spring, for example, the rotor can be biased also in the rotating direction.

Further, in the invention of claim 3, the rotating shaft is rotatably supported on one or both sides of the rotor side body and the sensor side body, and the rotor is the rotating shaft. It is configured to be attached so as to rotate integrally with.

Thus, the rotating shaft can be rotatably supported by the rotor side body or the sensor side body. For example, by rotating the rotating shaft from the outside of the rotor side body, the rotor in the rotor accommodating chamber is rotated. It can be rotated integrally with the shaft.

Further, in the invention of claim 4, the hysteresis generating portion is a body side sliding portion provided on the sensor side body, and a rotor provided on the rotor so as to face the body side sliding portion. Side sliding parts, and these sliding parts are in sliding contact with each other by the urging force of the spring.

As a result, when the rotor rotates, the rotor-side sliding portion and the body-side sliding portion are slid by the biasing force of the spring, and a frictional resistance force in the rotation direction is applied to the rotor. You can By this frictional resistance force, hysteresis can be generated with respect to external force or the like that rotates the rotor.

Further, in the invention of claim 5, the rotor has an insertion hole axially formed therein for inserting the rotation shaft, and a spring is arranged on the outer peripheral side in the rotor accommodating chamber. A body portion provided, a collar portion that projects radially from the outer peripheral side of the body portion, and an end portion side of the spring contacts, and an opposite side of the spring portion from the collar portion toward the sensor side body in the axial direction. It constitutes a project, the rotor-side sliding portion in sliding contact with the said sensor-side body at a position surrounding the sensor portion from the radially outer side forming the hysteresis generating portion.

Thus, the spring can be disposed between the collar portion of the rotor and the rotor side body, and the rotor side sliding portion can be pressed against the sensor side body with the collar portion of the rotor sandwiched by the spring. Further, the sensor unit can be disposed between the body of the rotor and the sensor-side body at a position surrounded by the rotor-side sliding portion.

According to a sixth aspect of the present invention , the sensor-side body closes the opening side of the rotor-side body and faces the rotor, and the rotation is located at the center of the lid. a support for supporting a shaft rotatably protrudes from the outer periphery of the lid in the axial direction towards the rotor side in the body, in sliding contact with the rotor at a position surrounding the sensor portion from the radially outer side It is composed of a body side sliding portion forming the hysteresis generating portion.

Thus, the rotation shaft can be rotatably supported by the support portion of the sensor side body. Also,
The body-side sliding portion can be projected into the rotor housing chamber from the opening side of the rotor-side body, and the tip portion thereof can be brought into sliding contact with the rotor. Further, the sensor unit can be disposed between the lid of the sensor side body and the rotor side body at a position surrounded by the body side sliding unit.

Further, in the invention of claim 7, the rotor-side body is formed as a bottomed tubular body by a tubular portion and a bottom portion, and the rotor accommodating chamber is formed between the tubular portion and the bottom portion. A support portion that rotatably supports the rotation shaft is provided on the bottom portion.

Thus, the rotating shaft can be rotatably supported by the supporting portion of the rotor side body, and in this state, the rotating shaft can be axially extended from the bottom of the rotor side body toward the sensor side body. Then, for example, a rotor is provided in the middle of the rotating shaft, and a spring is arranged between the rotor and the bottom of the rotor side body at a position opposite to the sensor side body in the axial direction with the rotor interposed therebetween. can do.

Further, in the invention of claim 8, the sensor portion is provided on either one of the rotor and the sensor side body, and a resistor extending in a rotation direction of the rotor, the rotor and the sensor side body are provided. Is provided on the other side of
And a sliding brush that is in sliding contact with the resistor at a position corresponding to the rotation angle of the rotor.

As a result, when the rotor rotates,
The sliding brush can be brought into sliding contact with the resistor at a position corresponding to the rotation angle, and the rotation angle of the rotor can be detected by the sensor unit as a change in the resistance value of the resistor.

Further, in the invention of claim 9, it is applied as an accelerator operation amount detecting device for connecting the rotating shaft to an accelerator pedal provided on a vehicle and detecting a rotating angle of the rotating shaft as an accelerator operation amount. is doing.

Thus, when the accelerator pedal is operated, the rotating shaft is rotated in accordance with the operation amount, and the rotation angle at this time can be detected as the accelerator operation amount by the sensor portion, and the accelerator is generated by the hysteresis generating portion. Hysteresis can be generated with respect to the pedal operation force.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a rotation angle detecting device according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6 as an example in which it is applied to an accelerator device of an automobile or the like. .

Reference numeral 1 denotes an accelerator device provided in a vehicle such as an automobile. The accelerator device 1 includes a mounting bracket 3 mounted on a vehicle body 2 and a connecting pin 4 at an intermediate portion in the longitudinal direction. 3, a pedal stay 5 rotatably attached to the upper end of the pedal stay 5, which engages with a turning lever 14 via a roller 15 described later, an accelerator pedal 6 fixed to the lower end of the pedal stay 5, and a mounting bracket 3 It is composed of an accelerator operation amount detection device 8 and the like which will be described later and is fixed to the shaft via bolts 7 and the like.

Then, the driver of the vehicle pushes the accelerator pedal 6
When the pedal is depressed in the direction of arrow A in FIG. 1, the rotation lever 14 is moved by the upper end of the pedal stay 5 as indicated by arrow B.
The rotation 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 detecting device as a rotation angle detecting device according to the present embodiment. As shown in FIG. 2, the accelerator operation amount detecting device 8 has a rotor side body 9 and a sensor side body 11 which will be described later. The rotary shaft 13, the rotor 16, the sensor unit 20, the return spring 23, the hysteresis generating unit 24, and the like.

Reference numeral 9 denotes a rotor-side body formed of, for example, a resin material as a bottomed tubular body, and the rotor-side body 9 has a tubular portion formed in a substantially cylindrical shape as shown in FIGS. 9A and a bottom portion 9B provided on one axial end of the tubular portion 9A, and the like, and a rotor housing 10 is formed in the rotor-side body 9 and opens toward the other axial end of the tubular portion 9A. ing.

Further, the rotor side body 9 has a cylindrical support portion 9C which protrudes from the center of the bottom portion 9B into the cylinder portion 9A and has an inner peripheral side serving as an insertion hole for the rotating shaft 13, and the support portion. A spring holding cylinder 9 that surrounds 9C and projects from the bottom 9B into the cylinder 9A with an annular gap between the cylinder 9A and the cylinder 9A.
D and are formed. Then, as shown in FIG. 6, the spring holding cylinder 9D is provided with a notch 9E for the return spring 23.

Reference numeral 11 denotes a resin sensor-side body fixed to the opening side of the cylindrical portion 9A of the rotor-side body 9. The sensor-side body 11 has a lid portion 11A formed in a substantially disc shape, and the lid portion. 11A, which is formed by integrally forming a bottomed cylindrical support portion 11B that is provided at the center of 11A and rotatably supports the other end side of the rotation shaft 13, and a sliding protrusion 12 and a connector 21 described later. Has been done.

An annular groove 11C is formed on the outer peripheral side of the sliding projection 12 on the sensor side body 11 over the entire circumference. Then, the tip of the tubular portion 9A of the rotor-side body 9 is fitted into the annular groove 11C, and in this state, the tip of the tubular portion 9A and the annular groove 11C are fixed by using a fixing means such as caulking, welding, or adhesion. ing.

[0037] 12 in the annular slide projection as <br/> body side slide portion constituting the hysteresis generating section 24, the sliding projection 12, as shown in FIGS. 3 and 4, the sensor-side body 1
The substrate 20A of the sensor unit 20 formed on the lid portion 11A
Etc. are axially projected toward the inside of the rotor housing chamber 10 from the outer peripheral side of the lid portion 11A at a position surrounding the above from the outside in the radial direction .
The sliding protrusion 12 is fitted in the cylindrical portion 9A of the rotor-side body 9 to position the sensor-side body 11 with respect to the rotor-side body 9 in the radial direction.

Reference numeral 13 is a rotary shaft formed of, for example, a metal material. The rotary shaft 13 is rotatably supported at one side in the axial direction in the support portion 9C of the rotor side body 9 and at the other end side. It is rotatably supported in the support portion 11B of the sensor-side body 11 and extends in the rotor housing chamber 10 in the axial direction.

Here, as shown in an enlarged view in FIG. 3, a slight gap ΔL is formed between the other end of the rotary shaft 13 and the bottom side of the support portion 11B, and this gap ΔL is slid. Moving protrusion 1
When 2 and 19 are worn and retracted as described later, the rotating shaft 13
Is allowed to be slightly displaced together with the rotor 16 toward the sensor side body 11.

One end of the rotary shaft 13 projects outside the rotor-side body 9, and the rotary lever 1 is located on the projecting end side.
4 is projected in the radial direction and is fixed in a rotation stop state. Further, a roller 15 engaged with the upper end side of the pedal stay 5 shown in FIG. 1 is rotatably attached to the tip end side of the turning lever 14.

Reference numeral 16 denotes a resin rotor rotatably accommodated in the rotor accommodating chamber 10. The rotor 16 has a substantially cylindrical body portion 16A which axially faces the lid portion 11A of the sensor side body 11. And a ring-shaped collar portion 16B that radially projects from the outer periphery of the body portion 16A on the other end side, and a sliding protrusion 19 and the like, which will be described later, are integrally formed.

The insertion hole 16 is provided at the center of the body 16A.
C is formed in the axial direction, and in the insertion hole 16C, an intermediate portion in the lengthwise direction of the rotary shaft 13 is fixed by a means such as insert molding so as to be prevented from being pulled out and prevented from rotating. As a result, the rotor 16 is supported by the rotating shaft 13 and rotates integrally with the rotating shaft 13.

An annular spring accommodating space 17 is provided between the outer peripheral surface of the body portion 16A and the inner peripheral surface of the rotor accommodating chamber 10.
And the spring accommodating space 17 is
It is defined by the body portion 16A and the collar portion 16B, the cylinder portion 9A of the rotor side body 9, the bottom portion 9B, and the spring holding cylinder 9D. Further, between the body portion 16A of the rotor 16 and the lid portion 11A of the sensor side body 11 shown in FIGS.
Sensor housing space 18 surrounded on to as slide projection 12, 19 Thus the radially outward is formed. Further, as shown in FIG. 6, the return spring 2 is provided on the body portion 16A.
A notch 16D for 3 is provided.

Reference numeral 19 denotes an annular sliding protrusion as a rotor-side sliding portion which constitutes the hysteresis generating portion 24. The sliding protrusion 19 is, as shown in FIGS.
1 is formed on the flange portion 16B of the rotor 16 so as to face the sliding protrusion 12 of the rotor 16, and at a position surrounding the sliding brush 20C and the like of the sensor portion 20 from the tip end side (outer peripheral side) of the flange portion 16B to the sensor side body 11. The tip end side is in sliding contact with the sliding protrusion 12 by the urging force of the return spring 23.

Here, the rotor 16 and the sensor side body 11
Is the resistor 20B of the sensor unit 20 and the sliding brush 20C.
And the like, and the sliding projections 12 and 19 are substantially the same as those when the resistor 20B of the sensor portion 20 and the sliding brush 20C wear and retract as described later. It is configured such that the wear recedes according to the wear amount (ratio).

Reference numeral 20 denotes a sensor portion including a potentiometer and the like provided between the rotor 16 and the sensor side body 11. The sensor portion 20 is a lid portion 11A of the sensor side body 11, as shown in FIGS. Board 20A fixed to
And a plurality of resistors 20B provided on the substrate 20A and extending in the rotation direction of the rotor 16, and fixing means such as heat staking and insert molding are used for the body portion 16 of the rotor 16.
It is composed of conductive sliding brushes 20C, 20C, etc., which are fixed to A and are in sliding contact with the resistor 20B, and these are housed in the sensor housing space 18.

A connector 21 is integrally formed on the sensor side body 11 in the sensor portion 20, and its terminal 21A is provided with a resistor 20 via a bonding wire 22 or the like.
Connected to B. When the rotor 16 rotates, the sliding brush 20C slides on the resistor 20B and changes the resistance value of the resistor 20B detected on the connector 21 side. As a result, the sensor unit 20 is
Is detected as a change in resistance value, and a detection signal is output from the connector 21.

Reference numeral 23 is a return spring composed of a coil spring or the like.
As shown in FIGS. 2 and 6, is disposed between the bottom portion 9B of the rotor-side body 9 and the flange portion 16B of the rotor 16, and is accommodated in the spring accommodating space 17. Further, the spring 23 is mounted on the outer peripheral side of the spring holding cylinder 9D and the body portion 16A, and both ends thereof are hooked in the notches 9E and 16D.

The return spring 23 biases the rotor 16 (rotating shaft 13) in the direction opposite to the arrow B direction in FIG.
The sliding protrusion 19 is pressed against the sliding protrusion 12 of the sensor side body 11 with B sandwiched.

As a result, the return spring 23 is
A frictional resistance force is applied between the sliding protrusions 12 and 19 of the hysteresis generating unit 24 to keep the contact state (pressure) between the resistor 20B of the sensor unit 20 and the sliding brush 20C substantially constant as described later, and to operate When the person releases the operation of the accelerator pedal 6, the pedal stay 5 is rotated in the direction opposite to the direction A shown by the arrow in FIG.

Reference numeral 24 denotes a hysteresis generating portion provided between the rotor side body 9 and the rotor 16, and the hysteresis generating portion 24 is, as shown in FIG. 3, the sliding protrusion 19 of the rotor 16 and the sensor side body 11. Of the rotor 16 by the urging force of the return spring 23.
A frictional resistance force in the rotating direction is given to the.

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

First, in FIG. 1, when the driver depresses the accelerator pedal 6, the pedal stay 5 is rotated around the connecting pin 4 in the direction of the arrow A, and the upper end thereof is engaged with the roller 15. The rotation lever 14 is rotated in the direction of arrow B against the return spring 23. As a result, in FIG. 2, the rotation shaft 13 of the accelerator operation amount detection device 8 rotates together with the rotor 16 relative to the rotor side body 9 and the like, and the rotation angle is detected by the sensor unit 20 as the accelerator operation amount. To be done.

When the driver releases the operation of the accelerator pedal 6, the rotating lever 14 is rotated in the direction opposite to the arrow B direction by the urging force of the return spring 23. As a result, the pedal stay 5 rotates in the direction opposite to the arrow A direction, and the accelerator pedal 6 moves toward the position before the depression operation.

In this case, the sliding protrusions 12 and 19 of the hysteresis generating portion 24 slide while being pressed against each other by the return spring 23 when the rotary shaft 13 rotates, and thus the slide protrusions 12 and 19 with respect to the rotary shaft 13. Provides frictional resistance in the direction of rotation. The frictional resistance force is a hysteresis between the operating force when the driver depresses the accelerator pedal 6 and the operating force when the driver releases the operation of the accelerator pedal 6 (a reaction force from the accelerator pedal 6). Generate. Thereby, the operation feeling of the accelerator pedal 6 can be stabilized.

Further, tentatively, the resistor 20B of the sensor section 20 is assumed.
If the sliding brush 20C and the sliding brush 20C slide away from each other while sliding over a long period of time, the contact pressure between them tends to decrease. However, in this case, since the sliding protrusions 12 and 19 of the hysteresis generating portion 24 are also in a state of being worn and retracted with substantially the same amount of wear, the body portion 1 of the rotor 16 is
6A is slightly displaced toward the sensor side body 11 by the amount of wear of the sliding protrusions 12 and 19 by the urging force of the return spring 23.

As a result, the resistor 20B of the sensor section 20 and the sliding brush 20C relatively come closer to each other by the displacement of the rotor 16 by the dimension of the wear and receding, so that the contact pressure between them is almost equalized by the return spring 23. It is kept at a certain size.

When the accelerator operation amount detecting device 8 is assembled, the rotary shaft 13 is attached to the rotor 16, and the rotor 16 is arranged in the rotor side body 9 together with the return spring 23. Rotating shaft 13
Install on. Then, the sliding protrusion 12 of the sensor-side body 11 is fitted into the cylindrical portion 9A of the rotor-side body 9, and the rotor-side body 9 and the sensor-side body 11 are fixed in this state.

Thus, in the present embodiment, the accelerator operation amount detecting device 8 includes the rotor side body 9, the sensor side body 11, the rotating shaft 13, the rotor 16, the sensor portion 20, the return spring 23, the hysteresis generating portion 24 and the like. Since it is configured by, it is possible to reduce the number of parts of the entire device
The structure can be simplified and the assembling work of the accelerator operation amount detection device 8 can be efficiently performed.

That is, the sensor section 20 and the hysteresis generating section 24 can be arranged between the rotor 16 and the sensor side body 11, whereby the sliding brush 20C and the sliding protrusion 19 can be arranged on the rotor 16. Sensor side body 11
The resistor 20B and the sliding protrusion 12 can be disposed on the.

As a result, it is not necessary to separately provide the sensor body for the sensor portion, the brush holder, and the sliding plates of the hysteresis generating mechanism as in the prior art.
These can be shared by the rotor 16 and the sensor side body 11.

Further, a return spring 23 for the accelerator pedal 6 is provided inside the rotor side body 9, and the hysteresis generator 2 is driven by the urging force of the return spring 23.
Since the frictional resistance is applied between the sliding projections 12 and 19 of 4, the return spring of the prior art and the pressing spring of the hysteresis generating mechanism can be shared, and the accelerator device 1 as a whole can be simplified. it can.

In this case, the rotor side body 9
Since the annular spring accommodating space 17 is formed between the cylindrical portion 9A, the bottom portion 9B, the spring retaining cylinder 9D, and the body portion 16A and the collar portion 16B of the rotor 16, the return spring 23 is stabilized in the spring accommodating space 17. Can be accommodated,
In this state, it is possible to reliably prevent the return spring 23 from flexing and being displaced.

Therefore, the return spring 23 sandwiches the flange portion 16B of the rotor 16 and the hysteresis generating portion 24.
The sliding projections 12 and 19 can be stably biased, and the spring holding member of the prior art can be omitted.

Further, the hysteresis generator 24 is connected to the rotor 1
6 and the annular sliding protrusions 12 and 19 formed on the sensor side body 11, respectively, the sliding protrusions 12 and 19 can be surely slidably contacted with each other by using the biasing force of the return spring 23. It is possible to apply a frictional resistance force to the above and to generate a stable hysteresis with respect to the operating force of the accelerator pedal 6.

Further, the rotor 16 and the sensor side body 11
Only set the sliding protrusions 12 and 19 is between these Surido突
The sensor housing space 18 surrounded by more radially outward force 12 and 19 can be formed between the cover portion 11A of the body portion 16A and the sensor-side body 11 of the rotor 16, housing the sensor unit 20 inside thereof can do. As a result, the sensor section 20 and the hysteresis generating section 24 can be arranged to face each other in the radial direction at substantially the same position in the axial direction, and the axial dimension of the accelerator operation amount detection device 8 can be surely reduced in size. You can

Then, in this state, the return spring 2
Since the urging force of No. 3 is also applied to the sensor unit 20, the resistance 20B of the sensor unit 20 and the sliding brush 2 are temporarily assumed.
Even when 0C and wear recede, the sliding projections 12 and 19 wear with a wear amount almost the same as
The resistor 20B of the sensor unit 20 and the sliding brush 20C can be brought relatively close to each other by the dimension that is worn and receded.

As a result, the resistor 20B and the sliding brush 2
These contact pressures can be maintained at a substantially constant magnitude by the return spring 23 without newly providing an adjusting spring or the like for adjusting the contact pressure with 0C, and the rotation angle of the rotation shaft 13 can be increased by the sensor unit 20. It is possible to stably detect over a period of time, and it is possible to reliably improve its durability and reliability.

Further, by providing the sensor-side body 11 with the annular sliding protrusion 12, when the accelerator operation amount detecting device 8 is assembled, the sliding protrusion 12 is fitted into the cylindrical portion 9A of the rotor-side body 9. As a result, the sensor side body 11 can be accurately positioned with respect to the rotor side body 9. Therefore, when these are assembled, the resistor 20B of the sensor unit 20 and the sliding brush 20C can be reliably prevented from being displaced in the radial direction by the sliding projection 12, and the assembling accuracy can be improved.

Further, both sides in the axial direction of the rotary shaft 13 are supported by the support portions 9C and 11B of the rotor side body 9 and the sensor side body 11, so that the rotor 16 is rotated integrally with the rotary shaft 13. From the rotation shaft 13 to the support portions 9C and 11
B can be supported in a stable state, and the rotation angle can be reliably detected by the sensor unit 20 via the rotor 16.

Although the return spring 23 is housed in the rotor side body 9 in the above-mentioned embodiment, the present invention is not limited to this, and the return spring for the accelerator pedal 6 may be a mounting bracket for the accelerator device 1. Another spring may be provided on the third side, and another spring for urging the rotor 16 toward the sensor side body 11 may be provided in the rotor side body 9.

In addition, in the above-described embodiment, both sides in the axial direction of the rotary shaft 13 are supported by the support portions 9C and 11B of the rotor side body 9 and the sensor side body 11, and one end side thereof is supported by the rotor side body 9. Although the configuration is such that it is projected from the portion 9C to the outside, the present invention is not limited to this, and the rotation shaft 13 may be supported by only one of the support portions 9C and 11B. The end side may be configured to project from the support portion 11B of the sensor side body 11 to the outside.

On the other hand, in the above embodiment, the sensor section 20
The resistor 20B is provided on the sensor side body 11 and the sliding brush 20C is provided on the rotor 16. However, the present invention is not limited to this, and the resistor 20B is provided on the rotor 16 and the sliding brush 20C is provided on the sensor side. It may be provided on the body 11.

Further, in the above-described embodiment, the contact type sensor portion 20 including a potentiometer is provided in the sensor housing space 18, but the present invention is not limited to this, and, for example, a magnetoresistive element, a hall element or the like may be used. A non-contact type sensor unit may be configured by the used electromagnetic pickup or an optical pickup using a photo coupler or the like, and this may be provided in the sensor housing space 18.

Further, in the above-described embodiment, the sliding protrusions 12 and 19 of the hysteresis generating portion 24 are provided on both the rotor 16 and the sensor side body 11, but the present invention is not limited to this, and the rotor 16 and A configuration may be adopted in which a sliding protrusion is provided only on one of the sensor-side body 11 and is in sliding contact with the other surface side.

Further, in the above-described embodiment, the rotary shaft 13 is connected to the pedal stay 5 of the accelerator pedal 6 by using the rotary lever 14 or the like, but the present invention is not limited to this, and the rotary lever is not limited thereto. Instead of 14, a wire drum or the like is provided on the rotating shaft 13, and the wire drum and the pedal stay 5 are connected by a wire or the like, and the rotating shaft 13 is rotated by the wire according to the operation amount of the accelerator pedal 6. It may be configured to move.

Further, in the above-mentioned embodiment, the case where the rotation angle detecting device is used as the accelerator operation amount detecting device 8 has been described as an example, but the present invention is not limited to this, and rotation of an arbitrary rotating body is performed. You may apply to the rotation angle detection apparatus which detects an angle.

[0078]

As described above in detail, according to the first aspect of the invention, the rotation angle detecting device is constituted by the rotor side body, the sensor side body, the rotor, the sensor section, the spring and the hysteresis generating section. Between the rotor and the sensor side body in the radial direction.
They can be arranged facing each other . This eliminates the need to separately provide a mounting member for the sensor unit and a sliding plate or the like of the hysteresis generating mechanism as in the prior art,
These members can be shared by the rotor and the sensor side body. Therefore, the number of parts of the entire device can be surely reduced, the structure thereof can be simplified, and the assembling work of the rotation angle detecting device can be efficiently performed. Also,
The sensor part and the hysteresis generation part are paired in the radial direction of the rotating shaft .
And direction, can be disposed at a position substantially equal to the axial direction, it is possible to reliably reduce the size of the axial dimension of the entire apparatus.

Further, according to the invention of claim 2, since the annular spring accommodating space for accommodating the coil spring is formed between the rotor side body and the rotor, the coil spring is stabilized in the spring accommodating space. Thus, it is possible to reliably prevent the coil spring from flexing and being displaced in this state. Therefore, the hysteresis generating portion can be stably biased by the coil spring, and the spring holding member of the prior art can be omitted. Further, for example, the rotor can be biased also in the rotating direction by using this coil spring, so that even when a return spring for the rotor is provided, this return spring can be shared with the coil spring, and the number of parts can be reduced. Can be reduced.

Further, according to the third aspect of the invention, since the rotating shaft is rotatably supported by the rotor side body or the sensor side body and is rotated integrally with the rotor, the rotating shaft is the rotor. It can be supported in a stable state by the side body or the sensor side body, and the rotation angle can be reliably detected by the sensor section via the rotor.

Further, according to the invention of claim 4, the rotor-side sliding portion and the body-side sliding portion of the hysteresis generating portion are brought into sliding contact with each other by the biasing force of the spring. A frictional resistance force can be reliably applied to the rotor by the moving portion and the body side sliding portion, and stable hysteresis can be generated against an external force or the like that rotates the rotor.

Further, according to the invention of claim 5, since the rotor is constituted by the body portion, the flange portion and the rotor side sliding portion, the spring is stably accommodated between the body portion of the rotor and the rotor side body. With this spring, the hysteresis generating portion can be stably urged across the flange portion of the rotor, and the urging force of the spring can surely generate hysteresis with respect to the rotating shaft. Further, the sensor section and the hysteresis generating section can be arranged at substantially the same position in the axial direction between the body of the rotor and the sensor side body, and the axial size of the entire apparatus can be reduced.

Further, according to the invention of claim 6, since the sensor side body is constituted by the lid portion, the support portion and the body side sliding portion, the sensor portion and the hysteresis generating portion are provided on the lid portion of the sensor side body and the rotor. Between them can be arranged at substantially the same position in the axial direction, the axial size of the entire apparatus can be reduced, and hysteresis can be reliably generated with respect to the rotating shaft by the biasing force of the spring. Further, when assembling the rotation angle detecting device, the sensor side body can be accurately positioned with respect to the rotor side body by the body side sliding portion, the positional deviation of the sensor portion can be prevented, and the operating state thereof can be stabilized. You can

Further, according to the invention of claim 7, since the rotor side body is constituted by the cylindrical portion, the bottom portion and the supporting portion, the spring is stably provided between the outer peripheral side of the rotor and the cylindrical portion of the rotor side body. It can be accommodated, hysteresis can be generated on the rotating shaft by the biasing force of the spring, and in this state, the rotating shaft can be reliably supported by the support portion of the rotor side body.

Further, according to the invention of claim 8, since the sensor portion is composed of the resistor and the sliding brush, these can be arranged in the rotor and the sensor side body together with the hysteresis generating portion, and the number of parts can be reduced. Can be achieved. Even if the resistor and the sliding brush wear back with respect to each other, the hysteresis generating portion wears back with an amount of wear similar to these, so that the resistor and the sliding brush wear back. It is possible to make the springs relatively close to each other by the urging force of the springs, and the contact pressures of these can be maintained at a substantially constant magnitude by the springs. Therefore, the rotation angle of the rotor can be stably detected by the sensor unit for a long period of time, and its durability and reliability can be reliably improved.

Further, according to the invention of claim 9, since it is configured to be applied to the accelerator operation amount detecting device, the rotation angle of the rotating shaft can be surely detected as the accelerator operation amount by the sensor portion, and the hysteresis generating portion. Thus, hysteresis can be generated with respect to the operation force of the accelerator pedal, and the operation feeling of the accelerator pedal can be stabilized.

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional view showing an accelerator operation amount detection device according to an embodiment of the present invention.

FIG. 3 is an enlarged view of a main part in FIG. 2, showing a sensor unit, a hysteresis generation unit, and the like of the accelerator operation amount detection device.

FIG. 4 is an enlarged front view showing a sliding protrusion, a resistor and the like of a sensor side body.

FIG. 5 is an enlarged front view showing a sliding protrusion, a sliding brush and the like of the rotor.

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

[Explanation of symbols]

6 accelerator pedal 8 Accelerator operation amount detector (rotation angle detector) 9 Rotor side body 9A tube 9B bottom 9C support 10 Rotor chamber 11 Sensor side body 11A lid 11B support 12 Sliding protrusion (sliding part on the body side) 13 rotation axis 16 rotor 16A body 16B collar part 16C insertion hole 17 Spring accommodation space 19 Sliding protrusion (rotor side sliding part) 20 sensor 20B resistor 20C sliding brush 23 Return Spring (Spring) 24 Hysteresis generator

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-299874 (JP, A) JP-A-7-305721 (JP, A) Actually published Shou 63-195654 (JP, U) Special Table 4- 504238 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01B ⁷ /00-7/30 G01D 5/16 F02D 9/00-11/10 G05G 1/00-25/04

Claims (9)

(57) [Claims] 1. A rotor-side body formed by opening a rotor housing chamber, a sensor-side body fixedly provided on the opening side of the rotor-side body in a state of closing the rotor housing chamber, and the rotor. housed rotatably in the rotor housing chamber side body, a rotor that will be rotated by the rotation shaft, is provided between the sensor-side body and the rotor, the relative said rotor relative to said sensor-side body Of the sensor unit for detecting a rotation angle when the rotor rotates, a spring provided between the rotor-side body and the rotor for urging the rotor toward the sensor-side body, and a sensor unit of the sensor unit. positioned radially outwardly provided between the sensor-side body and the rotor, and composed of a hysteresis generating section that gives the resistance between the sensor-side body and the rotor by the biasing force of the spring Become rotation angle detection device. Wherein said between rotor-side rotor housing chamber peripheral surface of the body and the outer peripheral surface of the rotor to form an annular spring accommodation space, the spring, the rotor is positioned in the spring housing space The rotation angle detecting device according to claim 1, wherein the rotation angle detecting device comprises a coil spring arranged between the side body and the rotor. 3. The rotating shaft is rotatably supported on one or both sides of the rotor-side body and the sensor-side body, and the rotor rotates integrally with the rotating shaft. The rotation angle detecting device according to claim 1 or 2, wherein the rotation angle detecting device is attached to the. 4. The hysteresis generating section includes a body side sliding section provided on the sensor side body, and a rotor side sliding section provided on the rotor facing the body side sliding section. The rotation angle detecting device according to claim 1, 2 or 3, wherein each of these sliding portions is in sliding contact with the urging force of the spring. 5. A body portion in which an insertion hole for inserting the rotation shaft is axially formed in a central portion of the rotor, and the spring is arranged on an outer peripheral side of the rotor, the insertion hole being located in the rotor accommodating chamber. A flange portion that radially projects from the outer peripheral side of the body portion, and an end portion side of the spring contacts, and a flange portion that protrudes from the collar portion toward the sensor side body in the opposite axial direction to the spring, rotation angle detection according parts to claim 1, 2 or 3 formed by composed of a rotor-side sliding portion forming the hysteresis generating portion in sliding contact with the said sensor-side body at a position surrounding the the radially outer side apparatus. 6. The sensor-side body closes an opening side of the rotor-side body to face the rotor, and a lid located at the center of the lid to rotatably support the rotary shaft. a supporting portion protrudes from an outer peripheral side of said lid portion in the axial direction towards the rotor side in the body, radially or outside the sensor portion
Rotation angle detecting apparatus according to claim 1, 2 or 3 formed by composed of a body side slide portion in sliding contact with the said rotor et surrounding position forming the hysteresis generating section. Wherein said rotor-side body and a cylindrical portion and a bottom portion
And a support portion that rotatably supports the rotation shaft is provided on the bottom portion, and the rotor storage chamber is formed between the cylinder portion and the bottom portion. The rotation angle detection device according to item 1, 2, 3, 4, 5 or 6. 8. The sensor unit is provided on either one of the rotor and the sensor side body, and is provided on the other of the resistor and the resistor extending in the rotation direction of the rotor. The rotation angle detection according to claim 1, 2, 3, 4, 5, 6 or 7, further comprising a sliding brush that is in sliding contact with the resistor at a position corresponding to the rotation angle of the rotor. apparatus. 9. The accelerator operation amount detection device, wherein the rotation shaft is connected to an accelerator pedal provided on a vehicle and the rotation angle of the rotation shaft is detected as an accelerator operation amount. The rotation angle detection device according to 2, 3, 4, 5, 6, 7 or 8.