JPH0357411B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for inspecting the thickness and warpage of a braking portion of a disc brake plate for a two-wheeled vehicle or the like.

Disc brakes for two-wheeled vehicles and the like are configured such that a brake portion on the outer periphery of a plate is held between both sides by calipers. Therefore, if the thickness of the brake part formed on the outer periphery of the disk increases, or if the deformation in the circumferential direction of the brake part increases, or if the brake part warps in the radial direction, etc. Due to a reduction in the contact area with the braking part, the brake may not be applied sufficiently. Therefore, by measuring the amount of deformation,
Items whose deformation amount is larger than the allowable value are excluded,
Conventionally, the plate thickness is measured using a micrometer, etc., which makes it difficult to measure the thickness of the entire circumference of the brake part, and has problems such as low measurement accuracy and low efficiency. There is. In addition, deformation in the circumferential direction of the braking part is determined by rotating the disk, expressing the vibration of a sensor in contact with one side of the disk on an analog meter, and visually observing the shaking of the pointer, which increases the error and There are problems in that it is almost impossible to analyze the shape of the entire length in the direction.

SUMMARY OF THE INVENTION An object of the present invention is to extract the deformation state of the entire brake part as a digital signal, thereby making it possible to efficiently and accurately analyze the deformation state of the entire brake part.

The method of the present invention involves changing the position in the thickness direction of the front and back surfaces of the plate in the outer periphery of the brake part of a rotated disc brake to be inspected, by contacting the probe substantially opposite both sides of the outer periphery of the brake part of the plate. and a sensor that detects the displacement value in the thickness direction of the plate surface at the inner periphery of the braking part with a probe in contact with one side of the inner periphery of the braking part. This method is characterized in that the data signal is calculated by a control device consisting of a microprocessor to measure variations in the thickness of the brake part, deformation in the circumferential direction of the brake part, warpage in the radial direction of the brake part, etc. The device for carrying out this test consists of a table on which the plate of the disk brake to be inspected is mounted and rotated, and a probe that is brought into contact with both sides of the outer periphery of the brake part of the plate to be inspected, which is attached to the table, so as to be almost opposite to both sides of the outer periphery of the brake part. A pair of sensors detecting the displacement values in the thickness direction of the front and back surfaces of the plate, and a probe is brought into contact with one side of the inner circumference of the brake part, and the displacement value of the plate surface in the thickness direction at the inner circumference of the brake part is detected. and a sensor that detects 3, which each sensor outputs.
It is equipped with a control device consisting of a microprocessor that calculates variations in the thickness of the brake part, circumferential deformation of the brake part, radial warpage of the brake part, etc. by calculating various digital data signals. Features.

Embodiments of the present invention will be explained with reference to the drawings: 1
is a table on which a disc brake plate, which is an object to be inspected, is placed, and is intermittently forced to rotate by a shaft 2 attached to its lower surface. Reference numeral 3 denotes a pressurizing body for pressing down the plate on the table 1, which is placed above the table 1, and the upper end of the rod 4 erected on the upper surface thereof can slide in the axial direction onto the end of the pipe-shaped connecting body 5. The pressure body 3 is urged toward the table 1 by a spring 6. Reference numeral 7 denotes an air cylinder provided in the vertical direction, and a connecting body 5 is rotatably attached to the rod thereof, so that the pressurizing body 3 can move up and down and can also rotate. Therefore, with the plate placed on the table 1 being pressurized by the pressurizing body 3, the plate and the pressurizing body 3 rotate together with the table 1. 8 is a fuselage to which the air cylinder 7 and the like are attached.

Reference numeral 9 denotes a rod-shaped support disposed vertically, and a support rod 10 attached horizontally to the lower end thereof and protruding toward the table 1 side is used to detect the amount of displacement in the thickness direction of the plate to be inspected. Two sensors 11 and 12 are installed facing upward in the radial direction of the table 1, and the rod-shaped probe 11
Reference numerals A and 12A are drive mechanisms (not shown), which are capable of forcibly sliding in the vertical direction and allowing each sensor to freely slide and output the amount. Reference numeral 13 denotes a mounting body that is slidably attached to the support body 9 above the support rod 10, and a support rod 14 is fixed to this in substantially parallel to the support rod 10. 15 is support rod 1
This sensor has the same configuration as the sensor 11 that is attached downward to the plate to be inspected and detects the displacement in the thickness direction of the plate to be inspected, and is arranged at a position that almost overlaps with the sensor 11. And sensors 11, 12,
Reference numeral 15 is placed at a position where these probes are in contact with both sides of the brake part of the plate placed on the table 1. Reference numeral 16 denotes a U-shaped moving body that is slidably attached to the support body 9 above the mounting body 13, and the rod of the air cylinder 17 attached to this is attached to the mounting body 13, and a screw passing through the movable body 16 is attached. A shaft 18 is provided, and the screw shaft 18 is connected to the handle 1 via a rotation transmission mechanism such as a bevel gear.
It is designed to rotate at 9. That is, when the screw shaft 18 is rotated with the handle 19, the mounting body 13 moves up and down via the moving body 16 and the air cylinder 17, and when the air cylinder 17 is operated, the sensor 15 can move up and down together with the mounting body 13. be. 2
Reference numerals 0 denote air jetting nozzles that project toward each other from the support rods 10 and 14, and the air jetted from these nozzles is sprayed onto both sides of the plate to be inspected.

21 is a bearing that supports the shaft 2; 22 is a disk fixed to the shaft 2; one contact body 23 is protruded from the outer circumference of the disk; limit switch 24
It is becoming easier to operate. The disk 22 can also be a rod.

25 is a blocking disc fixed to the shaft 2;
It has one recess 26 near the contact body 23 on its periphery, and the periphery of this disk 25 is connected to the photo sensor 2.
It is inserted into the light passing section of No.7. Since the photo sensor 27 is provided at a position slightly further forward than the limit switch 24 in the direction of rotation of the discs 24 and 25, when the cutoff disc 25 stops, the recess 26 is located in front of the photo sensor 27. Stop. 28 is an encoder attached to the lower end of the shaft 2, which outputs a signal of 200 pulses per revolution. However, the encoder 28 in one rotation
The number of output pulses can be set arbitrarily. A sprocket wheel 29 is fixed to the shaft 2, and the shaft 2 is driven by a motor 30 through this sprocket wheel.

The motor 30 is connected to a start switch (not shown)
When turned on by the user, it is activated and rotates the shaft 2, so that the recess 26 of the blocking disc 25 passes through the photo sensor 27, and the photo sensor 27 outputs an origin signal. In response to this origin signal, the control device 31 consisting of a microprocessor turns on a rotation permission signal to continue the rotation of the shaft 2, counts the rotation signals of the encoder 28, and at the same time, the sensor 11, 1
The data signals outputted by the probes 2 and 15 corresponding to the amount of movement of the respective probes are read. When the shaft 2 rotates once and the control device 31 counts the predetermined number of rotation signals output by the encoder 28, the control device 31 turns off the rotation permission signal, and then the contact body 23 of the disc 22 switches the limit switch. When 24 is operated, the motor 30 is stopped. At this time, the concave portion 26 of the blocking disc 25 is
It repeats that it is located in front of the photo sensor 27 in the rotation direction.

Note that each probe of the sensors 11, 12, and 15 is reset to zero in advance. The zero reset of each probe can be done, for example, as shown in Figures 6 and 7.
A reference bar 35 or a plate of known thickness is mounted on the table 1, and the sensor 11,
Reset with probes 12 and 15 in contact. Data regarding the thickness of the reference bar 35 and the deflection of each part of the table 1 in the circumferential direction is stored in the control device 31, and the control device 31 uses these data and each data output from the sensors 11, 12, and 15. is configured to calculate data of the plate to be inspected. The table 1 can be deflected by moving the sensor 15 along the support rod 14 and bringing its probe into contact with the top surface of the table 1. Reference numeral 32 denotes a screw shaft passing through the support rod 10 in the longitudinal direction of the support body 9. This screw shaft is rotated by a handle 33 via a rotation transmission mechanism such as a bevel gear, and the support rod 10 is connected to the sensor 1.
1 and 12.

The photo sensor 27 can be replaced with a proximity switch, a reed switch, or any other switch, and the table 1 can also be oriented vertically, so that the sensor changes its direction depending on the table 1.

Inspection of disc brake plates using this device is carried out on a table 1, as shown by the chain line in Figure 1.
A plate 34 is placed on top, and a braking portion on the outer periphery is placed between the sensor 11 and the sensors 12 and 15. At this time, since each probe of the sensors 11, 12, and 15 is moved up and down, the plate 34 can be placed on the table 1 without hitting each probe. When the plate 32 is placed on the table 1, the air cylinder 7 is activated and the pressurizing body 3 presses and fixes the plate 34. On the other hand, sensor 1
Each of the probes 1, 12, and 15 moves and comes into contact with the outer circumference and inner circumference of the lower surface of the brake part as shown in FIG. Remove dust etc. that has adhered to the surface of the

Then, when the user operates a switch to operate the motor 30, the motor 30 rotates the shaft 2 and rotates the plate 34 and the discs 22, 25.
Rotate. When the blocking disc 25 rotates and its recess 26 passes the photo sensor 27, the origin signal is input to the control device 31, the control device 31 turns on the rotation permission signal, and counts the rotation signal of the encoder 28. , the data in the circumferential direction of each part of the plate to be inspected 34 output by the sensors 11, 12, 15 for each rotation signal is sent to the control device 3.
1 and the data about the deflection of the reference bar 35 and the table 1 held by the control device 31 for each position, and calculate the data of each part in the circumferential direction regarding the plate 34 to be inspected. It is stored in the storage unit of the control device 31, and is processed by presenting it as necessary.

Based on the data from the sensors 11, 12, and 15, the plate thickness of the plate 34 to be inspected, variations in the plate thickness in the circumferential direction of the brake part, deflection of the brake part in the circumferential direction, and warpage of the brake part are determined. As shown in Fig. 5, if the plate 34 to be inspected has a step in the thickness direction between the braking part and the center part,
It is also possible to determine the step difference.

The plate thickness in the above inspection items can be determined by subtracting the measured values A and C of the sensors 11 and 15 from the thickness of the reference bar 35 shown in FIGS. 6 and 7. In this example,
Measure at 200 locations. Then, variations in the thickness of the braking portion in the circumferential direction, that is, the difference between the maximum thickness and the minimum thickness in the circumferential direction, are determined from the thickness measurement values described above. The deflection of the brake part in the circumferential direction, that is, the bending state of the brake part in the circumferential direction, is detected by the sensor 1.
By subtracting the deflection of the table 1 from the measured value A of 1, the bending state of the braking portion of the plate 34 in the circumferential direction can be determined. Next, the warpage of the brake part, that is, the deflection in the thickness direction of the outer peripheral end with respect to the inner peripheral end of the brake part, is determined by subtracting the measured value B of the sensor 12 from the measured value A of the sensor 11. and which direction the warpage is.

The control device 31 determines whether each test result obtained in this way is within the pass range for each test item stored in the control device 31 in advance, and if it fails, the buzzer or lamp is turned off. Announcement by flashing etc.

This device stops the shaft 2, in other words:
The table 1 is stopped by operating a limit switch 24 using a contact body 23 provided on a disc 22, so that the table 1 is always stopped at a fixed position. The output signals of the sensors 11, 12, and 15 are pulse signals. Therefore, for example, by providing a protrusion on the top surface of the table 1 that fits into a mounting hole provided on the plate of a disc brake,
If the plate 32 to be inspected is set in a constant state with respect to the table 1, the counting of pulse symbols output by the encoder 28 can always be started from the fixed position of the plate 34, so that the braking part of the plate 34 can be When there is a concave groove 36 as shown in FIGS. 7 and 8 and the probe of the sensor contacts it, for example, when a predetermined number of pulse signals from the encoder 28 or output signals from the sensor are counted,
By moving each probe up and down, it is possible to obtain data from each sensor without the groove 36 being a hindrance.

The rotating shaft 2 is configured to stop when the rotation permission signal output from the control device 31 is turned OFF and the limit switch 24 is operated, so even if the limit switch 24 is operated unnecessarily. Shaft 2 does not stop. Therefore, as in this example, if the limit switch 24 and the photo sensor 27 are placed close to each other in the circumferential direction of the shaft 2, with the photo sensor 27 slightly advanced in the rotating direction of the shaft 2, The blocking disk 25 can be stopped with its recess 26 located close to the front side of the photo sensor 27 in the direction of rotation. Therefore, almost immediately after rotating the shaft 2 for measurement, it is possible to cause the photo sensor 27 to output an origin signal and start counting pulses, thereby increasing inspection efficiency.

As described above, the present invention rotates the disk plate to be inspected, and measures the displacement in the thickness direction of the front and back surfaces of the plate at the outer periphery of the brake part, which is arranged substantially opposite both sides of the outer periphery of the brake part. A pair of sensors for detecting and a sensor for detecting a displacement value in the thickness direction of the plate surface at the inner circumferential part of the braking part disposed on one side of the inner circumferential part of the braking part output 3.
By processing various types of digital data, the plate thickness or warpage of the brake part is measured over the entire circumferential length of the brake part, so variations in plate thickness and circumferential plate thickness can be measured. Furthermore, since the bending state in the circumferential direction and the radial inclination of the brake part are measured and obtained as numerical values, inspections can be carried out efficiently and measurements can be made with high accuracy. can. Since data can be obtained over the entire length of the brake part in the circumferential direction, it is also possible to analyze the entire shape of the brake part. Moreover, if the data of the inspection pass range is stored in the control device, it is possible to efficiently and accurately determine whether the inspected plate passes or fails by comparing the data with each measured value.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view excluding the drive section, FIG. 2 is a front view of the drive section, and FIG. 3 is a front view of the drive section.
The figure is a side view, FIG. 4 is a sectional plan view of the disc part, FIG. 5 is a sectional plan view of the blocking disc, FIGS. 6 and 7 are enlarged front views of the probe part of each sensor, and The figure is a plan view of the plate to be inspected, and FIG. 9 is an enlarged sectional view of the plate to be inspected. 1: table, 2: shaft, 3: pressure body,
7: Air cylinder, 11, 12, 15: Sensor,
11A, 12A, 15A: Probe, 22: Disc, 23: Contact body, 24: Limit switch, 2
5: Blocking disc, 26: Recess, 27: Photo sensor, 28: Encoder, 31: Control device, 34:
Plate to be inspected.

Claims (1)

[Scope of Claims] 1. Displacement in the thickness direction of the front and back surfaces of the plate of a rotating disc brake to be inspected at the outer periphery of the brake part in which a probe is brought into contact with both surfaces of the outer periphery of the brake part of the plate substantially opposite to each other. and a sensor that detects the displacement value in the thickness direction of the plate surface at the inner periphery of the braking part with a probe in contact with one side of the inner periphery of the braking part. A disc brake plate inspection method that calculates data signals using a control device consisting of a microprocessor to measure variations in the thickness of the brake part, deformation in the circumferential direction of the brake part, warpage in the radial direction of the brake part, etc. . 2. A table on which the plate of the disc brake to be inspected is attached and rotated, and a probe is brought into contact with both sides of the outer periphery of the brake part of the plate to be inspected, which is attached to the table, and the front and back surfaces of the plate at the outer periphery of the brake part are brought into contact. a pair of sensors for detecting a displacement value in the thickness direction of the plate surface, and a sensor for detecting a displacement value in the thickness direction of the plate surface at the inner circumference of the brake part by bringing a probe into contact with one side of the inner circumference of the brake part. and a microprocessor that calculates variations in the thickness of the brake part, circumferential deformation of the brake part, radial warpage of the brake part, etc. by calculating the three types of digital data signals output by each of the sensors. A disc brake plate inspection device equipped with a control device. 3. According to claim 2, the deflection of the surface of the table on which the plate to be inspected is attached is stored in the control device as data measured in advance by a sensor that detects the displacement value of the plate surface in the thickness direction. Inspection device for disc brake plates.