JPH07239244A - Rotary shaft with code disc and formation thereof - Google Patents

Abstract

PURPOSE:To rotary drive a code disc with no shift by temporarily fixing the code disc onto a supporting flange such that the rotary eccentric error with respect to a rotary supporting part is removed regardless of the concentricity to the axis of a rotary shaft and then securing the code disc. CONSTITUTION:A rotary shaft 22 having a supporting flange 22b is inserted into a through hole of a code disc 60 and then fixed temporarily thereto by means of a press ring 66 having a resilient claw 66C. A gear 12 to be inspected is secured to the upper end of the rotary shaft 22. The code disc 60 is positioned such that the rotary eccentric error with respect to the rotary supporting part, i.e., a bearing block, is eliminated regardless of the axis of the rotary shaft 22. In other words, the image at the edge of the disc 60 is picked up by means of a microscopic camera and the disc 60 is shifted on the flange 2b such that the radial oscillation at the edge of the disc 60 due to rotation will be zero and secured through an adhesive 68 upon settling. This structure realizes rotation of the disc about the block for supporting the rotary shaft 22 with no eccentricity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary shaft with a cord disk rotatably mounted and supported on a rotary support portion, and
The present invention relates to a method of forming a rotary shaft with a code disc.

[0002]

2. Description of the Related Art In recent years, in order to inspect the state of formation of tooth surfaces of gears and the like, for example, the state of occurrence of dents, in a transmission error measuring device, for example, a gear to be inspected and a master gear are respectively attached to rotating shafts, The two are rotated in a state of being meshed with each other, the respective output rotation amounts are compared with each other, the number of surplus pulses is calculated, and based on the calculated surplus pulse,
It is considered to detect a dent formed on the tooth surface of the test gear. In detecting such a dent, it is necessary to measure the rotation amounts of the test gear and the master gear with extremely high precision. The resolution is, for example, 1 million pulses per rotation of the test gear and the master gear. It is required that the detection pulse be output in the order of. That is, there is a strong demand for means for detecting ultra-precision rotation angle in each industrial field.

In order to achieve such a resolution, a slit disk having a large number of slits formed on the outer peripheral portion thereof is coaxially attached to a rotary shaft as in the conventional case, and the rotary shaft is rotated through a photo interrupter. This is not possible if the detection disc is configured to output a detection pulse based on the slit passing through the photo interrupter due to the rotation of the slit disc. For example, a code disc is provided so as to output a detection signal of 4000 pulses per rotation. The code pattern formed on the code disk is scanned through a photoreflector using a laser beam, and the detection signal output from the photoreflector is set to a predetermined numerical value (for example, 2 ⁹
By multiplying by a vector, it is possible to obtain a detection pulse in the order of 1 million pulses.

[0004]

However, in such a fine code pattern formed on the code disk, the length along the radial direction must be set short. For this reason, when the code discs are attached to the rotary shafts to which the test gear and the master gear are attached, respectively, if the code discs are attached in an eccentric state with respect to the rotation axis, As a result, the code pattern fluctuates in the radial direction with respect to the photo reflector. As a result, it is often impossible to accurately read and scan the code pattern of the code disk by the photo reflector, and sometimes an error occurs or a state in which tooth surface detection cannot be performed occurs, and a solution is desired. ing.

In particular, when the code disc is mounted coaxially with respect to the rotary shaft, an eccentricity error which the rotary shaft itself has and an eccentricity error when the rotary shaft is mounted on the rotation support portion are always present. As a result, the center of rotation of the cord disc deviates from the actual center of rotation and eccentricity always occurs.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to ensure that when a rotary shaft to which a code disc is attached is rotationally driven, the code disc is reliably aligned with the rotation axis. It is to provide a rotary shaft with a code disk that is coaxial.

Another object of the present invention is to provide a method of forming a rotary shaft with a code disk, which can reliably manufacture the rotary shaft with a code disk described above.

[0008]

In order to solve the above-mentioned problems and achieve the object, a rotary shaft with a cord disk according to the present invention is rotatably attached to a rotary support portion according to the first aspect. A rotary shaft main body, a support flange portion integrally formed with the rotary shaft main body, a code disc mounted on the support flange portion, and the rotary shaft main body attached to the rotary support portion. With this state,
Irrespective of the coaxiality with the central axis of the rotary shaft main body, a temporary fixing means for temporarily fixing on the supporting flange portion so as to eliminate a rotational eccentricity error with respect to the rotary supporting portion, and a temporary fixing means by this temporary fixing means. Fixing means for fixing the formed cord disc on the supporting flange.

According to the second aspect of the present invention, the rotary shaft with the cord disk according to the present invention is formed integrally with the rotary shaft main body which is rotatably attached to the rotary support portion. A support flange portion, a code disc mounted on the support flange portion, and the rotary shaft main body attached to the rotary support portion, the code disc is placed at the center of the rotary shaft main body. Irrespective of the coaxiality with the axis, a temporary fixing means for temporarily fixing on the support flange portion so as to be coaxial with the rotation supporting axis of the rotation supporting portion, and a code disk provisionally determined by the temporary fixing means. Is provided on the support flange portion.

According to the third aspect of the present invention, the rotary shaft with the cord disk according to the present invention is formed integrally with the rotary shaft main body which is rotatably attached to the rotary support portion. A support flange portion, a code disc mounted on the support flange portion, and the rotary shaft main body attached to the rotary support portion, the rotary shaft at the edge of the code disc. Temporary fixing means for temporarily fixing the cord disc on the supporting flange portion so that swinging along the radial direction is taken along with rotation of the main body, and the cord disc temporarily fixed by the temporary fixing means is used for the supporting flange. It is characterized in that it is provided with a fixing means for fixing on the part.

Further, in the rotary shaft with the cord disc according to the present invention, according to the fourth aspect, the cord disc has a circular through hole through which the rotary shaft main body is inserted. However, the diameter of the through hole is set to be larger than the diameter of the rotary shaft body by a value obtained by adding at least an eccentricity error at the time of mounting the rotary shaft body and an eccentricity error of the rotary shaft body itself. Is characterized by.

According to a fifth aspect of the invention, the rotary shaft with a cord disk according to the present invention is characterized in that the fixing means is an adhesive.

According to a sixth aspect of the method for forming a rotary shaft with a cord disc according to the present invention, a circular transparent member having a cord disc formed at the center of the rotary shaft body is provided. The insertion step of inserting the hole so that the hole fits loosely, the placing step of placing the inserted code disc on the support flange portion integrally formed on the rotary shaft body, and the cord on the support flange portion. An attaching step of rotatably attaching the rotary shaft main body on which the disc is mounted to the rotary support portion, and a code disc mounted on the support flange portion are coaxial with the central axis of the rotary shaft main body. Irrespective of the above, a temporary fixing step of temporarily fixing on the supporting flange portion in a state where the rotational eccentricity error of the code disk is removed, and a fixing step of fixing the temporarily fixed code disk to the supporting flange portion. It is characterized by having it.

Further, according to a seventh aspect of the present invention, there is provided a method for forming a rotary shaft with a cord disc, wherein the rotary disc main body is provided with a circular disc having a cord disc formed at the center thereof. The insertion step of inserting the hole so that the hole fits loosely, the placing step of placing the inserted code disc on the support flange portion integrally formed on the rotary shaft body, and the cord on the support flange portion. An attaching step of rotatably attaching the rotary shaft main body on which the disc is mounted to the rotary support portion, and a code disc mounted on the support flange portion are coaxial with the central axis of the rotary shaft main body. Irrespective of the above, a temporary fixing step of temporarily fixing on the supporting flange portion so as to be coaxial with the rotation axis of the rotating shaft main body, and a fixing step of fixing the temporarily fixed code disc to the supporting flange portion. It is characterized by having.

According to the eighth aspect of the present invention, there is provided a method for forming a rotary shaft with a cord disc, wherein the rotary disc main body has a circular disc formed in the center thereof. The insertion step of inserting the hole so that the hole fits loosely, the placing step of placing the inserted code disc on the support flange portion integrally formed on the rotary shaft body, and the cord on the support flange portion. Attaching the rotary shaft body on which the disc is mounted to the rotation support portion so as to be rotatable, and accompanying the rotation of the rotary shaft body at the edge of the code disc mounted on the support flange portion. A provisional fixing step of temporarily fixing the cord disc on the support flange portion so as to be shaken in the radial direction, and a fixing step of fixing the temporarily fixed cord disc to the support flange portion. Is characterized by.

Further, in the method for forming a rotary shaft with a cord disk according to the present invention, according to claim 9, the fixing step fixes the code disk positioned by an adhesive on the support flange portion. It is characterized by doing.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of a rotary shaft with a slit according to the present invention was applied to a one-tooth-face mesh type gear test as a transmission error measuring device for detecting a dent on the tooth surface of a gear. A case will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an outline of a tooth flank dent detection device 10 by a tooth flank meshing type gear test to which an embodiment of a rotary shaft with a code disk according to the present invention is applied. . First, the configuration of the detection device 10 will be briefly described.

In the detection device 10, the first drive system 14 for rotating the test gear 12 with a predetermined torque and the master gear 16 meshing with the test gear 12 rotate the test gear 12 described above. Second drive system 18 for rotating with a torque larger or smaller than a predetermined torque of
And a detection system 20 for detecting dents on the gear 12 to be inspected. Here, this first drive system 14
In order to rotatably support the first rotating shaft 22 as the rotating shaft with the code disk, which is the feature of the present invention, where the test gear 12 is coaxially attached to one end. A first bearing block 24 as a rotation support portion of the above, and a first drive mechanism 26 for rotationally driving the first rotation shaft 22.
Further, the second drive system 18 is, like the first drive system 14, the second gear as a rotary shaft with a cord disk, which is a feature of the present invention, in which the master gear 16 is coaxially attached to one end. A rotating shaft 28, a second bearing block 30 to which the second rotating shaft 28 is attached and which rotatably supports the rotating shaft 28, and a rotational drive of the second rotating shaft 28. The second drive mechanism 32 of FIG.

The above-mentioned first drive mechanism 26 has an inverter motor as the first drive motor 34 and a first drive motor 34 coaxially fixed to the rotation shaft of the first drive motor 34.
Drive pulley 36, a first driven pulley 38 fixed to the other end of the first rotating shaft 22, and a first endless belt wound around the first drive pulley 36 and the first driven pulley 38. And 40. On the other hand, the above-described second drive mechanism 32 includes an inverter motor as the second drive motor 42, a second drive pulley 44 coaxially fixed to the rotation shaft of the second drive motor 42, and a second drive pulley 44. A second driven pulley 46 fixed to the other end of the rotating shaft 28 of
It is composed of a second drive pulley 44 and a second endless belt 48 that is stretched around a second driven pulley 46.

Here, for the detection operation described later, in this embodiment, the number of teeth of the master gear 16 and the number of teeth of the test gear 12 are set to be the same. In addition, the first bearing block 24 and the second bearing block 30
Are both fixed to a frame (not shown) of the detection device 10, whereby the first rotary shaft 22 and the second rotary shaft 28 are both arranged with their center positions fixed. Will be. In other words, in this embodiment, the center-to-center distance between the first rotary shaft 22 and the second rotary shaft 28 is set to a fixed value.

On the other hand, the above-mentioned detection system 20 determines the rotation amount (angle) of the first rotary shaft 22 with a predetermined precision, for example,
The first detection encoder 50 having a resolution of 2304000 pulses / rotation in this embodiment, and the second
The rotation amount (angle) of the rotary shaft 28 is set to a predetermined precision, for example, 230400 as the resolution in this embodiment.
Second encoder 52 for detection with 0 pulses / revolution
And the detection signals of both encoders 50 and 52 are input together, a comparison calculation unit 54 that compares and calculates both, and a dent detection unit 56 that detects a dent based on the calculation result from the comparison calculation unit 54. The display unit 58 displays the dent information detected by the dent detection unit 56.

The first encoder 50 for detection will be described in detail with reference to FIG.
A code disc 60 on which a code pattern is formed so as to have a sine wave output of 500 pulses / rotation, and the code disc 60.
A photo reflector 62 that emits light to the above code pattern and receives the reflected light to output a detection signal corresponding to the code pattern, and an output signal from this photo reflector 62 is a vector multiplied by 512 (= 2 ⁹ ) times. And a multiplying unit 64 for multiplying. Since the first detection encoder 50 is configured as described above, from now on,
A detection signal of 2304000 pulses is output from the multiplication unit 64 per one rotation of the gear 12 to be inspected.

Similarly, the second detection encoder 52 is
Although not shown in detail, the second rotary shaft 28 has the same configuration as the first detection encoder 50 described above.
Fixed to, a code disk formed to have a sine wave output of 4500 pulses / rotation, a photoreflector using a laser beam, and an output signal from this photoreflector multiplied by 512 (= 2 ⁹ ) times as a vector. And a multiplying unit for multiplying. Since the second detection encoder 52 is configured in this way, a detection signal of 2304000 pulses will be output per rotation of the master gear 16 from now on.

Here, as shown in FIG. 3, a cord disc 60
The first rotating shaft 22 to which is fixed is a state in which the rotating shaft main body 22a is rotatably supported by the first bearing block 24 described above and a state in which the rotating shaft main body 22a projects radially outward from the outer periphery of the rotating shaft main body 22a. And a supporting flange portion 22b on which the cord disc 60 is placed on one end surface thereof. The cord disc 60 has a circular through hole 60 through which the rotary shaft main body 22a is inserted.
a, and the diameter A of the through hole 60a is
an eccentricity error when the rotary shaft main body 22a is attached to the first bearing block 24 rather than the diameter B of a, and
The rotation shaft body 22a itself is set to be large by a value including at least the eccentricity error.

Here, the cord disc 60 is attached to the first rotary shaft 2
A mounting method for fixing to No. 2, in other words, a method for forming the rotary shaft with the code disk, which is a feature of the present invention, will be described with reference to FIGS.

First, before the first rotary shaft 22 is rotatably supported by the corresponding first bearing block 24,
The rotary shaft main body 22a of the first rotary shaft 22 is inserted into the through hole 60a of the code disc 60. Then, the code disk 60 is placed on one end surface of the support flange portion 22b. Thereafter, the pressing ring 66, which will be described later, is attached to the first rotating shaft 22.
It is inserted into the rotary shaft main body 22a, and the cord disc 60 is temporarily fixed in a state of being pressed onto one end surface of the support flange portion 22b through the pressing ring 66.

The pressing ring 66 is composed of the ring body 6
6a, a circular through hole 66b formed in the center of the ring main body 66a with a diameter set slightly larger than the diameter of the rotary shaft main body 22a, and an inner peripheral edge of the through hole 66b. , And a large number of elastic locking claws 66c formed so as to project inward in the radial direction. The diameter of the circle connecting the tips of the elastic locking claws 66c is equal to the diameter of the rotary shaft main body 22.
It is set to be slightly smaller than the diameter B of a. By forcibly inserting the pressing ring 66 configured as described above into the rotary shaft main body 22a, the press ring 66 is elastically held by the rotary shaft main body 22a at its stop position as shown in FIG. Will be In this way, the cord disc 60 pressed by the pressing ring 66 is attached to the support flange portion 22.
It is temporarily fixed while being pressed on one end surface of b.

After the gear 12 to be inspected is coaxially attached to the first rotary shaft 22 to which the cord disc 60 is temporarily fixed as described above,
The first rotary shaft 22 is rotatably supported by the corresponding first bearing block 24. here,
The first rotating shaft 22 is connected to the first bearing block 24.
The eccentricity error of the first rotary shaft 22 itself and the eccentricity error based on the mounting error when the first rotary shaft 22 is mounted to the first bearing block 24 are superimposed on each other while being rotatably supported by In this state, the center axis of the first rotation shaft 22 is eccentric from the regular rotation axis. When such an eccentric state occurs, the edge of the cord disc 60 attached to the first rotating shaft 22 will sway in the radial direction as the first rotating shaft 22 rotates.

Therefore, in this embodiment, when the code disc 60 is fixed to the first rotary shaft 22, the rotary disc is used as the rotary support portion regardless of the coaxiality with the central axis of the rotary shaft body 22a. Is set so that the rotational eccentricity error with respect to the first bearing block 24 is removed. In other words, when the code disc 60 is fixed to the first rotary shaft 22, it is coaxial with the rotary support axis of the first bearing block 24 regardless of the coaxiality with the central axis of the rotary shaft main body 22a. It is set so that it will be positioned.

Therefore, the edge of the cord disc 60 is photographed by a well-known microscope camera (not shown), and based on the photographed result, the edge of the cord disc 60 is radially moved in accordance with the rotation of the rotary shaft body 22a. The supporting member 22b supports the cord disc 60 so that the swaying along it becomes zero, that is, the swaying is removed.
Adjust and move on one end face of. And the code disc 60
In a state in which the end edge of the sway is swayed in the radial direction to be zero, an adhesive 68 serving as a fixing means is provided between the outer peripheral edge of the pressing ring 66 and the surface of the code disc 60 and the pressing ring 6.
The elastic locking claw 66c of 6 and the outer peripheral surface of the rotary shaft main body 22a are fixed to each other. In this way, the cord disc 60
Is fixed to the rotary shaft body 22a.

In this way, according to this embodiment, even if the rotary shaft main body 22a itself is eccentric, the rotary shaft main body 22a has the first bearing block 24.
Even if it is attached in an eccentric state to the cord disc 60, the cord disc 60 is in a state completely unrelated to these eccentric states.
With the rotation of the rotary shaft 22, the rotary shaft 22 is rotated without being eccentric to the rotary axis. As a result, as described above, even if the code pattern is finely formed so as to have a sine wave output of 4500 pulses / rotation, this code pattern can be reliably detected by the photo reflector 62.

Next, the detecting device 10 configured as described above.
The detection operation for detecting the dent formed on the tooth surface of the test gear 12 by the dent detection unit 56 will be described in detail with reference to FIG.

First, the number of teeth of the master gear 16 and the number of teeth of the test gear 12 are set to be the same, and the driving torque applied to the first rotating shaft 22 by the first driving mechanism 26 is set to, for example, 6
The gear 12 to be inspected as kgm is rotated in the same direction as the rotation direction when the gear 12 is actually mounted and used in the device (for example,
Drive clockwise. On the other hand, the second drive mechanism 32
Thus, the drive torque applied to the second rotary shaft 28 is set to, for example, 4 kgm, and the master gear 16 is rotationally driven in the direction opposite to the rotational direction of the test gear 12 meshing with the master gear 16 (eg, counterclockwise direction). As a result, the tooth faces on the clockwise side of each tooth of the test gear 12 and the tooth faces on the clockwise side of the corresponding teeth of the master gear 16 come into contact with each other. In other words, the tooth surface on the clockwise side of each tooth of the test gear 12 is detected by the master gear 16.

In such a rotating state, when the master gear 16 is rotated by an angle of θa = 1.00 degrees, ideally, the test gear 12 is also rotated by an angle of θb = 1.
It will rotate only 00 degrees. However, since a transmission error has actually occurred, θa≈θb. On the other hand, when the master gear 16 makes one rotation (360 degrees), the test gear 12 also makes one rotation (360 degrees),
It will return to the original contact position. That is, the angle deviation that occurs during rotation is 3 when the rotation start time is "0".
It will return to "0" again when it rotates 60 degrees. Such a fluctuation component of the rotation deviation is represented as a pseudo sine curve as shown in FIG.

The fluctuation component of the angular deviation represented by this waveform is called a cumulative pitch error, and in the case of an automobile, it mainly contributes to the in-vehicle noise as low frequency noise of 100 Hz or less. That is, when the rotation speed of the gear is 3000 rpm, 3000/60 = 50 (Hz).

On the other hand, in detecting a dent on the tooth surface of each tooth of the gear to be tested 12 on the clockwise side, assuming that the pitch circle diameters (R) of the master gear 16 and the gear to be tested 12 are 100 mm, respectively. The number of surplus pulses, which is the difference between the output pulses of the encoders 50 and 52, can be expressed as it is as an angle deviation. This will be described in detail below.

That is, the actual change in the number of surplus pulses as the difference between the output pulses of the encoders 50 and 52 appears as shown in FIG. Here, the pitch circumference length (L) of each of the master gear 16 and the test gear 12 = πR = 314
mm. As a result, the circumferential length of the pitch circle per pulse is L / 2,304,000 = 0.000136m.
It becomes m = 0.136 μm. In other words, the angular deviation represented by one extra pulse is 0.314 μm. As a result, assuming that the sudden change in the number of surplus pulses is 100 pulses in the comparison calculation unit 54, the angular deviation in this case is 0.136 × 100 in the dent detection unit 56.
= 13.6 μm. In this way
In the dent detection unit 56, the contact angular position of the gear 12 to be inspected with the master gear 16 is 13.6 μm from the true angular position.
You can see that you are either ahead or behind by m. Therefore, the height of the dent detected by the occurrence of the sudden surplus pulse is calculated straight as 13.6 μm. Such dent detection information is displayed on the display unit 58 such as a CRT, for example.

Further, by differentiating the change in the number of surplus pulses, the angular velocity ω (= Δ in the rotation of the gear 12 under test)
θb / Δt rad / sec, where t is time), and by further differentiating this angular velocity ω, the angular acceleration ω ′ (= Δω / Δt rad / sec ² ) can be obtained. It will be a matter. By thus obtaining the angular velocity ω and the angular acceleration ω ′, it is possible to directly obtain the magnitude of the meshing fluctuation that directly affects the driving noise.

On the other hand, when the counterclockwise tooth surface of each tooth of the gear 12 to be inspected is to be inspected, the state of attachment of the gear 12 to be inspected and the master gear 16 to the respective rotary shafts 22, 28 is maintained. The first drive mechanism 26 keeps the first
The drive torque applied to the rotary shaft 22 of, for example, 6 kgm
As a result, the test gear 12 is maintained in a state of being rotationally driven in the same direction (for example, clockwise direction) as the rotation direction when the gear 12 is actually mounted and used in the apparatus. On the other hand, the drive torque applied to the second rotary shaft 28 by the second drive mechanism 32 is set to, for example, 8 kgm, and the master gear 16 is rotated in a direction opposite to the rotation direction of the test gear 12 meshed with the master gear 16 (for example,
Drive counterclockwise). As a result, the test gear 12
The tooth surface on the counterclockwise side of each tooth and the tooth surface on the counterclockwise side of the corresponding tooth of the master gear 16 come into contact with each other. In other words, the counterclockwise tooth surface of each tooth of the test gear 12 is detected by the master gear 16.

As described above in detail, in this embodiment, the distance between the center of rotation of the master gear 16 and the center of rotation of the gear 12 to be inspected is set to a predetermined value, and a predetermined back gear is set. Since the master gear 16 is rotationally driven by applying a predetermined torque (load) in a state in which the two are meshed with each other with a lash, the test gear 12 is in a state substantially similar to the actual mounted state. It will be possible to inspect the dents while also considering the distortion and bending of the teeth. As a result, it is possible to accurately detect and measure the position and the height (amount) of the dent that causes the transmission error of the tooth that constitutes the driving noise that is one of the factors that obstruct the amenity in the vehicle interior. Therefore, it is possible to surely determine from the dent information displayed on the display unit 58 whether the occurrence of dents in the tested gear 12 that is tested requires correction or is not necessary.

As described above, according to this embodiment, in consideration of the actual gear meshing state, a flaw unrelated to the dent may be determined as a dent, and a practical use may be made. In this state, there is no risk of underestimating a problematic dent or profile mistake, and more reliable dent detection can be achieved.

Further, in this embodiment, the test gear 12 can be tested and the state of dents can be detected by rotating the master gear 16 once. Even if each of the manufactured gears is inspected by using this dent detection device 10, the time required for this inspection is extremely short, and the operation is performed without any hindrance to the productivity. It is possible to reliably detect a dent that causes noise and in a short time.

Needless to say, the present invention is not limited to the configuration of the above-described embodiment, and can be variously modified without departing from the scope of the present invention.

For example, in the above-described embodiment, the master gear 16 and the gear to be inspected 12 are rotated once in a state of being meshed with each other to detect a dent formed on the tooth surface of the gear to be inspected 12. However, the present invention is not limited to such a configuration, and may be configured to detect a dent by rotating the both a few times, for example, to the extent that productivity is not hindered. good.

Further, in the above-described embodiment, the torque applied to the first rotary shaft 22 to which the test gear 12 is attached is constant, and the torque is applied to the second rotary shaft 28 to which the master gear 16 is attached. Although it has been described that the applied torque is variable, the present invention is not limited to such an aspect, the torque applied to the second rotating shaft 28 to which the master gear 16 is attached is constant, and the test is performed. Gear 12
The torque applied to the first rotary shaft 22 to which is attached may be variable.

[0047]

As described above in detail, according to the first aspect of the present invention, the rotary shaft with the cord disk according to the present invention includes the rotary shaft body rotatably mounted on the rotary support portion and the rotary shaft. A support flange portion integrally formed on the main body, a code disc placed on the support flange portion, and the rotary shaft main body attached to the rotary support portion,
Temporary fixing means for temporarily fixing the code disc on the support flange portion so as to eliminate the rotational eccentricity error with respect to the rotation support portion, regardless of the coaxiality with the central axis of the rotation shaft body. Fixing means for fixing the cord disc temporarily fixed by the temporary fixing means on the support flange portion.

According to the second aspect of the present invention, the rotary shaft with the cord disk according to the present invention is formed integrally with the rotary shaft main body rotatably attached to the rotary support portion. A support flange portion, a code disc mounted on the support flange portion, and the rotary shaft main body attached to the rotary support portion, the code disc is placed at the center of the rotary shaft main body. Irrespective of the coaxiality with the axis, a temporary fixing means for temporarily fixing on the support flange portion so as to be coaxial with the rotation supporting axis of the rotation supporting portion, and a code disc temporarily fixed by the temporary fixing means. Is provided on the support flange portion.

According to the third aspect of the present invention, the rotary shaft with the cord disk according to the present invention is formed integrally with the rotary shaft main body rotatably attached to the rotary support portion. A support flange portion, a code disc mounted on the support flange portion, and the rotary shaft main body attached to the rotary support portion, the rotary shaft at the edge of the code disc. Temporary fixing means for temporarily fixing the cord disc on the supporting flange portion so that swinging along the radial direction is taken along with rotation of the main body, and the cord disc temporarily fixed by the temporary fixing means is used for the supporting flange. It is characterized in that it is provided with a fixing means for fixing on the part.

Further, in the rotary shaft with the cord disc according to the present invention, according to the fourth aspect, the cord disc has a circular through hole through which the rotary shaft main body is inserted. However, the diameter of the through hole is set to be larger than the diameter of the rotary shaft body by a value obtained by adding at least an eccentricity error at the time of mounting the rotary shaft body and an eccentricity error of the rotary shaft body itself. Is characterized by.

According to a fifth aspect of the invention, in the rotary shaft with a cord disc according to the present invention, the fixing means is an adhesive.

Further, according to a sixth aspect of the present invention, there is provided a method for forming a rotary shaft with a cord disc, wherein the rotary disc main body is provided with a circular disc having a cord disc formed at the center thereof. The insertion step of inserting the hole so that the hole fits loosely, the placing step of placing the inserted code disc on the support flange portion integrally formed on the rotary shaft body, and the cord on the support flange portion. An attaching step of rotatably attaching the rotary shaft main body on which the disc is mounted to the rotary support portion, and a code disc mounted on the support flange portion are coaxial with the central axis of the rotary shaft main body. Irrespective of the above, a temporary fixing step of temporarily fixing on the supporting flange portion in a state where the rotational eccentricity error of the code disk is removed, and a fixing step of fixing the temporarily fixed code disk to the supporting flange portion. It is characterized by having it.

Further, according to a seventh aspect of the present invention, there is provided a method for forming a rotary shaft with a cord disc, wherein the rotary disc main body is provided with a circular disc having a cord disc formed at the center thereof. The insertion step of inserting the hole so that the hole fits loosely, the placing step of placing the inserted code disc on the support flange portion integrally formed on the rotary shaft body, and the cord on the support flange portion. An attaching step of rotatably attaching the rotary shaft main body on which the disc is mounted to the rotary support portion, and a code disc mounted on the support flange portion are coaxial with the central axis of the rotary shaft main body. Irrespective of the above, a temporary fixing step of temporarily fixing on the supporting flange portion so as to be coaxial with the rotation axis of the rotating shaft main body, and a fixing step of fixing the temporarily fixed code disc to the supporting flange portion. It is characterized by having.

Further, according to the eighth aspect of the present invention, there is provided a method for forming a rotary shaft with a cord disc, wherein the rotary disc main body has a circular disc having a cord disc formed at the center thereof. The insertion step of inserting the hole so that the hole fits loosely, the placing step of placing the inserted code disc on the support flange portion integrally formed on the rotary shaft body, and the cord on the support flange portion. Attaching the rotary shaft body on which the disc is mounted to the rotation support portion so as to be rotatable, and accompanying the rotation of the rotary shaft body at the edge of the code disc mounted on the support flange portion. A provisional fixing step of temporarily fixing the cord disc on the support flange portion so as to be shaken in the radial direction, and a fixing step of fixing the temporarily fixed cord disc to the support flange portion. Is characterized by.

Further, in the method for forming a rotary shaft with a cord disk according to the present invention, according to the ninth aspect, the fixing step is performed by fixing the code disk temporarily fixed with an adhesive onto the support flange portion. Characterized by sticking.

Therefore, according to the present invention, when the rotary shaft to which the code disc is attached is rotationally driven, the rotary disc with the cord disc is surely coaxial with the rotary axis. Will be provided.

Further, according to the present invention, there is provided a method of forming a rotary shaft with a code disk, which can reliably manufacture the rotary shaft with a code disk described above.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a configuration of a dent detection device to which a configuration of an embodiment of a rotary shaft according to the present invention is applied.

FIG. 2 is a perspective view schematically showing a first detection encoder for detecting a rotation amount of a gear to be inspected.

FIG. 3 is an exploded perspective view showing a state before the cord disc is attached to the rotary shaft.

FIG. 4 is a front view showing a state in which a code disc is placed on a support flange portion of a rotary shaft.

FIG. 5 is a perspective view showing a state in which the cord disc is temporarily fixed onto the support flange portion via a holding ring.

FIG. 6 is a diagram schematically showing a change state of a fluctuation component of a rotation deviation when a tooth flank dent detection method is performed.

FIG. 7 is a diagram showing an actual change state of the number of surplus pulses as a difference between output pulses of both encoders.

[Explanation of symbols]

 10 Detection Device 12 Test Gear 14 First Drive System 16 Master Gear 18 Second Drive System 20 Detection System 22 First Rotating Shaft 22a Rotating Shaft Main Body 22b Support Flange 24 First Bearing Block 26 First Driving Mechanism 28 Second rotary shaft 30 Second bearing block 32 Second drive mechanism 34 First drive motor 36 First drive pulley 38 First driven pulley 40 First endless belt 42 Second drive motor 44 2nd drive pulley 46 2nd driven pulley 48 2nd endless belt 50 1st detection encoder 52 2nd detection encoder 54 Comparison calculation part 56 Scratch detection part 58 Display part 60 Code disk 60a Through hole 62 photoreflector 64 multiplication part 66 pressing ring 66a ring body 66b through hole 66c elastic locking claw 68 It is wearing agent.

Claims (9)

[Claims] 1. A rotary shaft main body rotatably attached to a rotary support part, a support flange part integrally formed on the rotary shaft main body, and a code disc mounted on the support flange part. In the state where the rotary shaft main body is attached to the rotary support part, the code disc is removed from the rotation eccentricity error with respect to the rotary support part regardless of the coaxiality with the central axis of the rotary shaft main body. A cord circle characterized by comprising: a temporary fixing means for temporarily fixing on the supporting flange portion; and a fixing means for fixing the cord disc temporarily fixed by the temporary fixing means on the supporting flange portion. Rotating shaft with plate. 2. A rotary shaft main body rotatably attached to a rotary support portion, a support flange portion integrally formed with the rotary shaft main body, and a code disc mounted on the support flange portion. In the state where the rotary shaft main body is attached to the rotary support part, the code disc is coaxial with the rotary support axis line of the rotary support part, regardless of the coaxiality with the central axis line of the rotary shaft main body. And a fixing means for fixing the cord disc, which is temporarily fixed by the temporary fixing means, on the supporting flange portion. Rotating shaft with disk. 3. A rotary shaft main body rotatably attached to a rotary support part, a support flange part integrally formed on the rotary shaft main body, and a code disc mounted on the support flange part. With the rotary shaft main body attached to the rotary support portion, the cord disc is fixed so that the edge of the code circular disc is shaken along the radial direction as the rotary shaft main body rotates. Rotation with a code disc, characterized by comprising: temporary fixing means for temporarily fixing on the support flange portion; and fixing means for fixing the code disc temporarily fixed by the temporary fixing means on the support flange portion. axis. 4. The cord disc has a circular through hole at the center thereof through which the rotary shaft main body is inserted, and the diameter of the through hole is larger than the diameter of the rotary shaft main body. 4. The cord disc according to claim 1, wherein the eccentricity error at the time of mounting the main body and the eccentricity error of the rotating shaft body itself are set to be large by a value added at least. Axis of rotation. 5. The rotary shaft with a cord disk according to claim 1, wherein the fixing means is an adhesive. 6. An inserting step of inserting a cord disc into a rotary shaft main body so that a circular through hole formed in a central portion of the cord disc is loosely fitted, and the inserted cord disc is inserted into the rotary shaft main body. A mounting step of mounting on a support flange portion integrally formed in the, and a mounting step of rotatably mounting the rotary shaft main body having the code disk mounted on the support flange portion to the rotary support portion, The code disc mounted on the support flange portion is irrespective of the coaxiality with the central axis of the rotary shaft main body, and is placed on the support flange portion with the rotation eccentricity error of the code disc removed. A method of forming a rotary shaft with a code disk, comprising: a temporary fixing step of temporarily fixing, and a fixing step of fixing the temporarily fixed code disk to the support flange portion. 7. An inserting step of inserting a cord disc into a rotary shaft main body so that a circular through hole formed in a central portion of the rotary shaft main body is loosely fitted, and the inserted cord disc is inserted into the rotary shaft main body. A mounting step of mounting on a support flange portion integrally formed in the, and a mounting step of rotatably mounting the rotary shaft main body having the code disk mounted on the support flange portion to the rotary support portion, The code disc mounted on the support flange portion is provided on the support flange portion so as to be coaxial with the rotation axis line of the rotary shaft body regardless of the coaxiality with the central axis line of the rotation shaft body. A method of forming a rotary shaft with a code disk, comprising: a temporary fixing step of temporarily fixing, and a fixing step of fixing the temporarily fixed code disk to the support flange portion. 8. An inserting step of inserting a cord disc into a rotary shaft main body so that a circular through hole formed in a central portion of the cord disc is loosely fitted, and the inserted cord disc is inserted into the rotary shaft main body. A mounting step of mounting on a support flange portion integrally formed in the, and a mounting step of rotatably mounting the rotary shaft main body having the code disk mounted on the support flange portion to the rotary support portion, Temporarily fixing the cord disc on the support flange portion so that the edge of the cord disc placed on the support flange portion is shaken in the radial direction due to the rotation of the rotary shaft body. A method for forming a rotary shaft with a code disk, comprising: a temporary fixing step; and a fixing step of fixing the temporarily fixed code disk to the support flange portion. 9. The cord disc according to claim 6, wherein in the fixing step, the cord disc temporarily fixed with an adhesive is fixed on the support flange portion. Method of forming rotating shaft.