JP6330725B2 - Clutch operation observation device and clutch operation observation method - Google Patents

Description

  The present invention relates to a clutch operation observation device and a clutch operation observation method, and more particularly to a technique for operating and observing a clutch inside a transmission in a sub-assembly state.

  Patent Document 1 discloses an engagement mechanism evaluation device that evaluates the performance of an engagement mechanism in a transmission in a sub-assembly state. This engagement mechanism evaluation device feeds back the detected values of torque, rotation speed and hydraulic pressure detected by a torque meter, a tachometer and a pressure transducer so that each detected value matches each preset value set in advance. The current command value is calculated in real time. Thereby, even if the clutch which is an engagement mechanism is in a part state, it is possible to reproduce the actual working behavior corresponding to the assembly state.

  Furthermore, this engagement mechanism evaluation apparatus photographs the behavior of the clutch from the outside with a high-speed camera.

JP 2009-236729 A

  Here, the clutch to be imaged by the engagement mechanism evaluation device disclosed in Patent Document 1 is rotating at high speed, so even a high-speed camera cannot accurately capture a portion to be measured in the clutch. There's a problem.

  The present invention provides a clutch operation observation apparatus and a clutch operation observation method that can observe the behavior of a clutch with higher accuracy.

  A clutch operation observation apparatus according to a first aspect of the present invention is a clutch operation observation apparatus that observes an operation by engaging an engagement mechanism of a clutch inside a transmission in a sub-assembly state, the engagement mechanism being provided from an outer peripheral surface. A clutch drum having an observation window portion, a photographing portion for photographing a part of the outer peripheral surface of the clutch drum, and a position detection portion for detecting the position of the observation window portion while the clutch drum is rotating. And the imaging unit is engaged through the observation window when the position of the observation window detected by the position detection unit is within the imaging range of the imaging unit. The mechanism is photographed.

  According to this, it is possible to perform imaging when the observation window portion that enables the internal engagement mechanism to be visually recognized from the outer peripheral surface of the clutch drum is located within the imaging range. Therefore, since the engaging mechanism in operation can be accurately photographed through the observation window, the behavior of the clutch can be observed with higher accuracy.

  Further, the above-described clutch operation observation device further includes a lubricating oil supply unit that supplies lubricating oil to the clutch drum, and supply of the lubricating oil to an oil path from the lubricating oil supply unit to the clutch drum. You may make it provide the valve which can switch interruption | blocking.

  According to this, the lubricating oil to the clutch drum can be shut off when the clutch engagement mechanism is observed. Further, when the clutch engagement mechanism is not observed, lubricating oil can be supplied to the clutch drum. Therefore, image distortion due to scattered oil can be suppressed while preventing seizure of the clutch.

  Further, in the above-described clutch operation observation device, the engagement mechanism includes a clutch plate provided on an inner periphery of the clutch drum, a friction plate provided on a clutch hub and engaged with the clutch plate, A piston that presses the clutch plate against the friction plate to engage the clutch plate and the friction plate, and each of the clutch plate, the friction plate, and the piston has a different color from each other. The paint may be applied. Furthermore, each of the clutch plate, the friction plate, and the piston may be coated with a paint other than red.

  According to this, the contrast of the components (piston, clutch plate, and friction plate) of the engagement mechanism can be improved, and the extraction of the edges of each component can be facilitated. Further, by using a paint of a color other than red, the color of each component becomes a color different from the lubricating oil supplied to the clutch, and the contrast can be further improved.

  In the above-described clutch operation observation device, the clutch drum has a magnetic body on its outer peripheral surface, and has a crest and a trough alternately on the outer peripheral surface with respect to the rotation direction. Has the observation window part in one of the peak part and the valley part, and the position detection part has a magnetic sensor for detecting a magnetic change from the outer peripheral surface of the clutch drum, Based on the change in magnetism detected by the sensor, it may be detected that the peak or valley having the observation window is located within the imaging range of the imaging unit.

  According to this, it is possible to accurately detect when the observation window portion that enables the internal engagement mechanism to be visually recognized from the outer peripheral surface of the clutch drum is located within the photographing range by effectively using the shape of the clutch drum. .

  A clutch operation observation method according to a second aspect of the present invention is a clutch operation observation method in which an engagement mechanism of a clutch inside a transmission is operated in a sub-assembly state and is observed, and the engagement mechanism inside the clutch from an outer peripheral surface. Detecting the position of the observation window portion during rotation of the clutch drum having the observation window portion that makes it possible to visually recognize, and the detected position of the observation window portion is a part of the outer peripheral surface of the clutch drum. The engaging mechanism that is in operation is photographed through the observation window when positioned within the photographing range of the photographing part to be photographed.

  According to this, it is possible to perform imaging when the observation window portion that enables the internal engagement mechanism to be visually recognized from the outer peripheral surface of the clutch drum is located within the imaging range. Therefore, since the engaging mechanism in operation can be accurately photographed through the observation window, the behavior of the clutch can be observed with higher accuracy.

  According to the aspect of the present invention described above, it is possible to provide a clutch operation observation device and a clutch operation observation method that can observe the behavior of the clutch with higher accuracy.

It is a figure which shows the structure of the visualization system 1 which concerns on embodiment. It is a figure which shows the internal structure of the visualization unit which concerns on embodiment. It is an A direction arrow directional view of the visualization window concerning an embodiment. It is a figure which shows the structure of the synchronous circuit which concerns on embodiment. It is a figure which shows the output signal of the rotation sensor which concerns on embodiment. It is a figure which shows the output signal of the synchronous circuit which concerns on embodiment. It is a figure which shows the internal structure of the clutch which concerns on embodiment. It is a figure which shows the state before the stroke of the engagement mechanism which concerns on embodiment. It is a figure which shows the state in the stroke of the engagement mechanism which concerns on embodiment. It is a figure which shows the state after the stroke of the engagement mechanism which concerns on embodiment. It is a figure which shows the lubrication mechanism of the clutch which concerns on embodiment. It is an external view of the visualization unit which concerns on embodiment. It is a figure which shows the state before the stroke of the engagement mechanism which concerns on a comparative example. It is a figure which shows the state in the stroke of the engagement mechanism which concerns on a comparative example. It is a figure which shows the state after the stroke of the engagement mechanism which concerns on a comparative example.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Specific numerical values and the like shown in the following embodiments are merely examples for facilitating understanding of the embodiments, and are not limited thereto unless otherwise specified. In the following description and drawings, matters obvious to those skilled in the art are omitted and simplified as appropriate for the sake of clarity.

  First, with reference to FIG. 1, the structure of the visualization apparatus 1 which concerns on embodiment of this invention is demonstrated. As shown in FIG. 1, the visualization device 1 includes a visualization unit 2, a synchronization circuit 3, a high-speed camera 4, an illumination 5, a pressure sensor 6, an ECU (Electronic Control Unit) control device 7, and an ECT ( Electronic Control Transmission) -ECU 8 and trigger SW (switch) 9. Hereinafter, “ECT-ECU8” is also simply referred to as “ECU8”.

  The visualization unit 2 is a unit (subassembly) of a vehicle component. The visualization unit 2 is a unit including an engagement mechanism of a clutch to be visualized (observed). The visualization unit 2 is, for example, a transaxle case including a transmission or a transmission case. The engagement mechanism corresponds to a range including a piston, a clutch plate, and a friction plate, which will be described later, in the clutch.

  The synchronization circuit 3 is a circuit that instructs the high-speed camera 4 to shoot when the high-speed camera 4 is ready to shoot. More specifically, the synchronization circuit 3 outputs a signal instructing shooting to the high-speed camera 4 at the shooting timing of the high-speed camera 4.

  The high-speed camera 4 is a photographing device that photographs the visualization unit 2 in accordance with a photographing instruction from the synchronization circuit 3. More specifically, the high-speed camera 4 captures the visualization unit 2 when a signal for instructing capturing is input from the synchronization circuit 3. The high-speed camera 4 records captured image data indicating the captured image in a storage device inside the high-speed camera 4. The storage device is, for example, a hard disk or a memory.

  The illumination 5 is an illumination device that illuminates the imaging range of the high-speed camera 4 in the visualization unit 2. The illumination device is, for example, an incandescent lamp or an LED (Light Emitting Diode).

  The pressure sensor 6 detects the hydraulic pressure related to the clutch in the visualization unit 2 and notifies the ECU control device 7 of the detected hydraulic pressure. More specifically, the pressure sensor 6 detects the hydraulic pressure related to the clutch in the visualization unit 2, generates a hydraulic pressure signal indicating the detected hydraulic pressure, and outputs the hydraulic pressure signal to the ECU control device 7. The pressure sensor 6 detects, for example, the original pressure of an oil pump that supplies hydraulic oil to the hydraulic chamber of the clutch, the hydraulic pressure of the hydraulic chamber of the clutch, or the like as the hydraulic pressure related to the clutch. Further, the visualization device 1 includes a plurality of pressure sensors 6, and each of the plurality of pressure sensors 6 is configured to respectively control the original pressure of the oil pump and the hydraulic pressures of the plurality of clutch hydraulic chambers of the visualization unit 2. You may make it detect.

  The ECU control device 7 controls the ECU 8 and records the hydraulic pressure notified from the pressure sensor 6. More specifically, the ECU control device 7 outputs an instruction signal for instructing the start of control of the visualization unit 2 to the ECU 8 when the visualization device 1 starts observing the clutch engagement mechanism. Further, the ECU control device 7 acquires the hydraulic pressure data output from the pressure sensor 6 and records it in a storage device inside the ECU control device 7. The ECU control device 7 is, for example, a personal computer that executes various processes such as the above-described control of the ECU 8 and recording of hydraulic pressure, and various types of communication between the personal computer and other devices (pressure sensor 6, ECU 8, trigger SW9). An IO-BOX or the like for enabling transmission / reception of information (various signals and various data) is included. The above-described storage device in the ECU control device 7 is, for example, a hard disk or a memory included in a personal computer.

  The ECU 8 operates the visualization unit 2 in accordance with control from the ECU control device 7. The ECU 8 starts control of the visualization unit 2 in response to an instruction signal instructing start of control of the visualization unit 2 from the ECU control device 7. More specifically, the ECU 8 operates a torque converter connected to the visualization unit 2. Thereby, the input shaft in the visualization unit 2 rotates. The ECU 8 controls the hydraulic pressure of the clutch in the visualization unit 2 and operates the clutch engagement mechanism. This operation may be performed only once by engaging and releasing the engaging mechanism, and may be performed only once by engaging and releasing the engaging mechanism. The opening may be repeated. By photographing the engaging mechanism in operation with the high-speed camera 4, the engaging mechanism can be observed.

  The trigger SW 9 is an input device that receives an input instructing the start of observation of the clutch engagement mechanism from the user and notifies the input to the high-speed camera 4 and the ECU control device 7. More specifically, the user presses the trigger SW 9 when instructing the start of observation of the clutch engagement mechanism. The trigger SW 9 outputs an instruction signal for instructing the start of observation of the clutch engagement mechanism to the high-speed camera 4 and the ECU control device 7 in response to a press from the user. The ECU control device 7 starts acquiring hydraulic pressure data in response to the instruction signal from the trigger SW9. The high-speed camera 4 starts imaging of the visualization unit 2 in response to an instruction signal from the trigger SW 9.

  Thus, by aligning the timing of recording the captured image data and the hydraulic pressure data, each of the captured image data and the hydraulic pressure data is separately recorded in the high-speed camera 4 and the ECU control device 7, respectively. Also, it is easy to associate the captured image data with the hydraulic pressure data indicating the hydraulic pressure at the time of capturing the captured image indicated by the captured image data.

  Then, with reference to FIG. 2, the internal structure of the visualization unit 2 which concerns on embodiment of this invention is demonstrated. As shown in FIG. 2, the visualization unit 2 includes a visualization window 10, a clutch drum 11, and a rotation sensor 12. The clutch drum 11 has a plurality of peak portions 13 and a plurality of valley portions 14 on the outer peripheral surface thereof. Each of the plurality of valleys 14 has a through hole 15.

  The visualization window 10 is a window provided by performing additional processing on the case of the visualization unit 2. The visualization window 10 is a window that allows the inside of the case of the visualization unit 2 to be visually recognized while preventing scattering of the lubricating oil inside the case of the visualization unit 2. The visualization window 10 is made of a transparent material so that the inside of the case of the visualization unit 2 can be visually recognized. The material used for the visualization window 10 is, for example, quartz glass. The gap between the case of the visualization unit 2 and the visualization window 10 is molded with, for example, an aluminum plate and a sealing material.

  The clutch drum 11 constitutes a part of a clutch provided in the visualization unit 2. The clutch drum 11 has crests 13 and troughs 14 alternately on the outer circumferential surface thereof in the rotational direction. The through hole 15 is a through hole penetrating from the outer peripheral surface of the clutch drum 11 toward the inside. Therefore, the engagement mechanism inside the clutch can be visually recognized from the outer peripheral surface of the clutch drum 11 through the through hole 15.

  Here, the high-speed camera 4 and the illumination 5 are installed above the visualization window 10. The high speed camera 4 can photograph a part of the clutch drum 11 through the visualization window 10. In other words, the high-speed camera 4 includes a part of the clutch drum 11 in its shooting range. The illumination 5 illuminates the imaging range of the high-speed camera 4 on the clutch drum 11 through the visualization window 10.

  That is, as shown in FIG. 3, a part of the outer peripheral surface of the clutch drum 11 can be visually recognized from the visualization window 10. Further, as shown in FIG. 3, a part of the outer peripheral surface of the clutch drum 11 is included in the shooting range 16 of the high-speed camera 4. For example, as shown in FIG. 3, the shooting range 16 of the high-speed camera 4 is large enough to include at least one through-hole 15.

  The rotation sensor 12 is a device that detects the position of the through hole 15. The rotation sensor 12 is installed above the imaging range 16 of the clutch drum 11 and below the visualization window 10. The rotation sensor 12 detects whether or not the through hole 15 is located in the imaging range 16 located below the rotation sensor 12. The rotation sensor 12 outputs a signal indicating whether or not the through hole 15 is located within the imaging range 16 to the synchronization circuit 3 according to the detection result. Based on this signal, the synchronization circuit 3 outputs a signal for instructing shooting to the high-speed camera 4 when the through-hole 15 is located within the shooting range 16. Thus, the high-speed camera 4 can take an image when the through hole 15 is located in the imaging range 16.

  Next, the configuration of the synchronization circuit 3 according to the embodiment of the present invention will be described with reference to FIG. As shown in FIG. 4, an operational amplifier OP, a first resistor R1, a second resistor R2, a first variable resistor (resistance voltage dividing circuit) VR1, and a second variable resistor VR2 are included.

  As a signal indicating whether or not the above-described through hole 15 is located within the imaging range 16, a current IN having a current value corresponding to whether or not the through hole 15 is located within the imaging range 16 is input to the synchronization circuit 3. The One end of the second resistor R2 and the non-inverting input terminal of the operational amplifier OP are connected to the input (voltage source) of the current IN from the rotation sensor 12. The output terminal of the operational amplifier OP is connected to one end of the second variable resistor VR2. The other end of the second variable resistor VR2 is connected to one end of the first resistor R1. One end of the first variable resistor VR1 is connected to the voltage source described above. The other end of the second resistor R2, the other end of the first resistor R1, and the other end of the first variable resistor VR1 are connected to the ground.

  More specifically, the first variable resistor VR1 is a resistance voltage dividing circuit, and has one end connected to the voltage source and the other end connected to the voltage output end (not shown), and one end connected to the voltage output end. A resistor (not shown) connected to the voltage output terminal and connected to the ground at the other end is included. This voltage output terminal is connected to the inverting input terminal of the operational amplifier OP.

  Then, a voltage between one end and the other end of the first resistor R <b> 1 is output to the high speed camera 4 as a signal for the high speed camera 4.

  According to the synchronization circuit 3, as shown in FIG. 5, when a current from the rotation sensor 12 is inputted, a voltage is outputted to the high-speed camera 4 as shown in FIG. As shown in FIG. 5, when the rotation sensor 12 detects the valley portion 14 of the clutch drum 11 at the detection position below itself, the rotation sensor 12 outputs a current of the first current value, When the peak portion 13 of the clutch drum 11 is detected at the detection position, a current having a second current value higher than the first current value is output.

  The detection of the valley portion 14 and the peak portion 13 is realized by having a magnetic body so as to make a round without being interrupted on the outer peripheral surface of the clutch drum 11. The rotation sensor 12 is a magnetic sensor that detects magnetism generated by the magnetic body on the outer peripheral surface of the clutch drum 11, generates a current corresponding to the magnitude of the detected magnetism, and supplies the current to the synchronization circuit 3. That is, when the distance between the outer peripheral surface of the clutch drum 11 and the rotation sensor 12 is increased as in the valley portion 14 of the clutch drum 11, the magnetism detected by the rotation sensor 12 is also reduced. While such a small magnetism is detected, the rotation sensor 12 outputs a current having a first current value according to the magnetism. On the other hand, when the distance between the outer peripheral surface of the clutch drum 11 and the rotation sensor 12 is close like the peak portion 13 of the clutch drum 11, the rotation sensor 12 detects it compared to the valley portion 14 of the clutch drum 11. The magnetism to be increased. While such a large magnetism is detected, the rotation sensor 12 outputs a current having a second current value larger than the first current value in accordance with the magnetism.

  In this manner, when a current as shown in FIG. 5 is input to the synchronization circuit 3, the synchronization circuit 3 is set to 0 V (0V (during the period when the current of the first current value is input) as shown in FIG. The voltage of the first voltage value is output, and during the period in which the current of the second current value is input, a voltage of a predetermined voltage value (second voltage value) higher than that is output. That is, the synchronization circuit 3 functions as a comparator. Therefore, the resistance value of the first variable resistor VR1 (the two resistance values included in the first variable resistor VR1) is equal to the reference voltage at which the voltage corresponding to the first current value is 0 V in the operational amplifier OP. Is input in advance to the inverting input terminal. The resistance value of the second variable resistor VR2 is determined in advance so that the period corresponding to the second current value becomes a voltage having a desired voltage value. Thereby, the synchronizing circuit 3 outputs a pulse signal as shown in FIG. 6 to the high-speed camera 4.

  For example, the resistance value of the first resistor R1 is 1 kΩ, and the resistance value of the second resistor R2 is 300Ω. Further, for example, the resistance value of the first variable resistor VR1 is 1 kΩ, and the resistance value of the second tail variable resistor VR2 is 5 kΩ.

  As shown in FIG. 6, the high-speed camera 4 uses the input timing of the falling edge of the pulse signal input from the synchronization circuit 3 as the imaging timing. That is, the high-speed camera 4 performs imaging when the falling edge of the pulse signal is input. According to this, it is possible to perform shooting when the peak portion 13 of the clutch drum 11 comes out of the shooting range 16 and the valley portion 14 having the through hole 15 enters the shooting range 16. Therefore, the engagement mechanism inside the clutch can be photographed through the through hole 15.

  Then, with reference to FIG. 7, the internal structure of the clutch 20 which concerns on embodiment of this invention is demonstrated. As shown in FIG. 7, the clutch 20 includes a clutch drum 11, a clutch hub 17, a piston 21, a clutch plate 22, a friction plate 23, a spring retainer 24, a return spring 25, and a hydraulic chamber 26. Have.

  The piston 21 frictionally engages the plurality of clutch plates 22 and the plurality of friction plates 23 by pressing them in the direction of the rotation axis (right direction in FIG. 7). The plurality of clutch plates 22 are fitted (spline fitted) to the inner peripheral portion of the clutch drum 11 and are supported by the clutch drum 11 so as to be movable in the rotation axis direction (left and right direction in FIG. 7). The plurality of friction plates 23 are fitted (spline fitted) to the outer periphery of the clutch hub 17 and are supported by the clutch hub 17 so as to be movable in the direction of the rotation axis. The clutch plates 22 and the friction plates 23 are alternately arranged with respect to the rotation axis direction.

  The spring retainer 24 is disposed so as to face the piston 21. The return spring 25 is installed on the surface of the spring retainer 24 that faces the piston 21 and biases the piston 21 toward the hydraulic chamber 26 (leftward in FIG. 7). The hydraulic chamber 26 is formed as a space between the clutch drum 11 and the piston 21 inside the clutch drum 11.

  When the clutch 20 is engaged, the ECU 8 supplies hydraulic oil to the hydraulic chamber 26 to increase the hydraulic pressure in the hydraulic chamber 26. The piston 21 is pushed toward the clutch plate 22 and the friction plate 23 (right direction in FIG. 7) by the hydraulic pressure from the hydraulic chamber 26, and the return spring 25 is compressed. Thereby, the piston 21 moves to the clutch plate 22 and the friction plate 23 side, and the plurality of clutch plates 22 and the plurality of friction plates 23 are engaged. That is, the clutch 20 is engaged.

  On the other hand, when releasing the clutch 20, the ECU 8 stops supplying hydraulic oil to the hydraulic chamber 26 and reduces the hydraulic pressure in the hydraulic chamber 26. The piston 21 is pushed back to the hydraulic chamber 26 side (left direction in FIG. 7) by the elastic force of the return spring 25 that has been compressed. Thereby, the piston 21 moves to the hydraulic chamber 26 side, and the plurality of clutch plates 22 and the plurality of friction plates 23 are opened. That is, the clutch 20 is released.

  Subsequently, an operation of the engagement mechanism of the clutch 20 according to the embodiment of the present invention and an example of a captured image in the operation will be described with reference to FIGS. Each of FIGS. 8 to 10 shows a state during operation of the engagement mechanism of the clutch 20 as an upper diagram, and a schematic diagram of a photographed image in that state as a lower diagram. The lower diagrams of FIGS. 8 to 10 illustrate the contents of the 0th, 750th, and 1800th frames of the captured images that are the results of the actual visualization experiment (operation result of the visualization apparatus 1). FIG.

  Hereinafter, in FIGS. 8 to 10, the four clutch plates 22 are referred to as the first, second, third, and fourth in order from the leftmost to the right. In addition, the three friction plates 23 are referred to as the first, second, and third in order from the leftmost to the right.

  FIG. 8 shows the state of the engagement mechanism before the stroke of the piston 21. As shown in the upper diagram of FIG. 8, the pressing of the clutch plate 22 by the piston 21 is not started, and in the engagement mechanism, the piston 21, the clutch plate 22, and the friction plate 23 are separated from each other. . At this time, a photographed image as shown in the lower diagram of FIG.

  FIG. 9 shows the state of the engagement mechanism during the stroke of the piston 21. As shown in the upper diagram of FIG. 9, the pressing of the clutch plate 22 by the piston 21 is started. When the first clutch plate 22 is pressed by the piston 21, it moves in the direction of the rotation axis (right direction in FIG. 9), and is engaged with the first friction plate 23 located next to it. Further, when the first friction plate 23 is pressed by the piston 21 via the first clutch plate 22, the first friction plate 23 moves in the rotation axis direction (right direction in FIG. 9), and two adjacent to it The eye clutch plate 22 is engaged. The third and fourth clutch plates 22 are not yet engaged with the other clutch plates 22, and the second and third friction plates 23 are still not engaged with the other friction plates 23. Not matched. At this time, a photographed image as shown in the lower diagram of FIG.

  FIG. 10 shows the state of the engagement mechanism after the stroke of the piston 21. As shown in the upper diagram of FIG. 10, the piston 21 has moved to the maximum in the direction in which the clutch plate 22 is pressed (the right direction in FIG. 10). All the clutch plates 22 and all the friction plates 23 are pressed and engaged by the piston 21. That is, the piston 21 is engaged with the first clutch plate 22, and the first to fourth clutch plates 22 and the first to third friction plates 23 are alternately engaged. At this time, a photographed image as shown in the lower diagram of FIG.

  Here, as shown in the lower diagrams of FIGS. 8 to 10, the pistons 21, the clutch plates 22, and the friction plates 23 are coated with paints of different colors. In addition, each of the clutch plate 22 and the friction plate 23 is coated with a paint only on a surface visible through the through hole 15, and no paint is coated on a surface not visible through the through hole 15. . Thus, the contrast is improved by coloring the side surfaces of the components 21 to 23 of the engagement mechanism of the clutch 20. For example, the piston 21 may be yellow, the clutch plate 22 may be white, and the friction plate 23 may be blue. Preferably, the piston 21, the clutch plate 22, and the friction plate 23 are colored with a color other than red. Thus, the contrast can be further improved by using a color different from the color (red) of the lubricating oil (ATF: Automatic Transmission Fluid) supplied to the clutch 20.

  Subsequently, a lubrication mechanism of the clutch 20 of the visualization unit 2 according to the embodiment of the present invention will be described with reference to FIGS. 11 and 12. As shown in FIG. 11, the lubrication mechanism of the clutch 20 includes an oil pump 30, a valve body 31, and a lubricating oil cutoff valve 32.

  The oil pump 30 sucks up lubricating oil in an oil pan (not shown) and supplies it to the valve body 31. The valve body 31 supplies the clutch 20 with the hydraulic pressure of the lubricating oil. Here, the visualization unit 2 has an existing oil passage 40 and a bypass oil passage 41 provided by additional work as an oil passage for lubricating oil from the valve body 31 to the clutch 20. The existing oil passage 40 is processed so as not to allow lubricating oil to pass through by additional processing. That is, the lubricating oil is supplied from the valve body 31 to the clutch 20 via the bypass oil passage 41.

  Here, the bypass oil passage 41 is provided with a lubricating oil cutoff valve 32. The operator can switch between supplying and shutting off the lubricating oil from the valve body 31 to the clutch 20 via the bypass oil passage 41 by opening and closing the lubricating oil shutoff valve 32.

  FIG. 12 shows an external view of the visualization unit 2. As shown in FIG. 12, the existing oil passage 40 is provided in the case of the visualization unit 2, but a bypass oil passage 41 is newly provided outside the case of the visualization unit 2. The bypass oil passage 41 is provided with a lubricating oil cutoff valve 32.

  By closing the lubricating oil shutoff valve 32, the lubricating oil to the clutch 20 is shut off. As a result, when the engagement mechanism of the clutch 20 is observed (when the visualization experiment is performed), the operator closes the lubricating oil shutoff valve 32 to stop the supply of the lubricating oil, and the image of the image due to the scattering of the lubricating oil is displayed. Strain can be suppressed. On the other hand, the lubricating oil is supplied to the clutch 20 by opening the lubricating oil cutoff valve 32. Thereby, when the engagement mechanism of the clutch 20 is not observed, the operator opens the lubricating oil cutoff valve 32 to restart the supply of the lubricating oil, and the clutch pack (clutch plate 22 and friction plate 23). Can be prevented.

  Subsequently, the effect of the present embodiment will be described with reference to FIGS. FIGS. 13 to 15 show the state during operation of the clutch engagement mechanism as an upper diagram, and show a photographed image in that state as a lower diagram. The lower diagrams of FIGS. 13 to 15 show the captured images of the 0th frame, the 1250th frame, and the 2500th frame among the captured images that are the results of the actual visualization experiment. 13 shows the state of the engagement mechanism before the piston stroke, FIG. 14 shows the state of the engagement mechanism during the piston stroke, and FIG. 15 shows the state of the engagement mechanism after the piston stroke. .

  Here, in the comparative example in which the captured images illustrated in FIGS. 13 to 15 are captured, the synchronous circuit 3 and the rotation sensor 12 perform synchronized capturing in comparison with the visualization system 1 that captures the captured images illustrated in FIGS. The mechanism, the mechanism for preventing distortion of the photographed image by the bypass oil passage 41 and the lubricating oil cutoff valve 32, and the contrast is not improved by coloring the piston 21 and the clutch pack (the clutch plate 22 and the friction plate 23). In such a configuration according to the comparative example, problems described in the following (1) to (3) occur.

(1) Frame out of drum through-hole When shooting is synchronized with rotation using an existing rotation sensor, the shot image is affected by the torsional component in the torque transmission path or the gear meshing component. However, there is a problem that the through hole (engagement mechanism) is out of the frame. The existing rotation sensor is, for example, an engine crank angle sensor that detects the rotation speed of the crankshaft, a force rotation speed sensor that detects the rotation speed of the input shaft, or an output rotation speed sensor that detects the rotation speed of the drive pinion shaft. It is. The influence of the torsional component of the torque transmission path means that the shaft bends and the image shifts due to a torque change at the time of shifting (when the clutch is engaged or released). Further, the influence of the gear meshing component means that the image is shifted by the backlash of the gear at the time of shifting.

(2) Image distortion due to scattering of lubricating oil As described above, the periphery of the piston to be visualized is lubricated with lubricating oil to prevent seizure of the clutch pack. Due to this influence, there is a problem that the lubricant is scattered around the piston to be visualized and the image is distorted.

(3) Piston identification difficulty due to low contrast The piston and clutch pack in the clutch are all steel, and there is a problem that it is difficult to extract the edge portion and the behavior cannot be grasped. In addition, when a paint is applied to the entire surface of the piston in order to realize high contrast, there is a concern about behavior change due to the coating film and behavior change due to the peeling coating film entering the valve body. As a change in behavior due to the release coating entering the valve body, the release coating is caught on the spool valve, and the valve that controls the hydraulic pressure becomes sluggish or the valve does not move at all (sticks). Conceivable.

  In the present embodiment, each of the problems (1) to (3) described above is solved by the following configurations (1) to (3).

(1) High-speed camera 4, synchronization circuit 3, and rotation sensor 12
In the present embodiment, the through-hole 15 of the clutch drum 11 to be visualized is directly detected, and the detection is notified to the high-speed camera 4 as a pulse signal to perform synchronous shooting. As a result, the influence of the frame-out due to the torsional component and the gear meshing component in the transmission path is eliminated, and the synchronous photographing through the through hole 15 is realized.

(2) Lubricating oil shutoff valve 32
In the present embodiment, the lubricating oil to the clutch 20 can be shut off by the lubricating oil cutoff valve 32 when the visualization is performed (when the observation is performed). As a result, while suppressing the seizure of the clutch pack, the distortion of the image due to the scattered oil is suppressed.

(3) Application of oil resistant paint to piston 21 and clutch pack (clutch plate 22 and friction plate 23) In the present embodiment, the side surfaces of piston 21 and clutch pack (clutch plate 22 and friction plate 23) are colored. ing. As a result, the piston 21 and the clutch pack are made high in contrast and the piston edge is extracted. In addition, by applying the paint only to the side surfaces of the piston 21 and the clutch pack, it is possible to suppress the behavior change caused by the stick of the solenoid valve due to the release coating entering the valve body.

  As described above, the visualization device 1 (clutch operation observation device) according to the present embodiment has the observation window portion (through hole 15) that allows the internal engagement mechanism to be visually recognized from the outer peripheral surface. A photographing part (high-speed camera 4 and synchronizing circuit 3) for photographing a part of the outer peripheral surface of the clutch drum 11, and a position detecting part (rotation sensor 12) for detecting the position of the observation window part during rotation of the clutch drum 11. ). Then, when the position of the observation window detected by the position detection unit is within the imaging range of the imaging unit, the imaging unit images the engaging mechanism that is operating through the observation window.

  According to this, it is possible to perform photographing when the observation window portion that allows the internal engagement mechanism to be visually recognized from the outer peripheral surface of the clutch drum 11 is located within the photographing range. Therefore, since the engaging mechanism in operation can be accurately photographed through the observation window, the behavior of the clutch 20 can be observed with higher accuracy.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

  In the above embodiment, an example in which the clutch mechanism 22 has four clutch plates 22 and three friction plates 23 in the engagement mechanism of the clutch 20 has been described. However, the number of clutch plates 22 and friction plates 23 is not limited to this example. Not limited to.

  In the above embodiment, the example in which the through hole 15 is provided in the valley portion 14 in the clutch drum 11 has been described, but the present invention is not limited thereto. The through hole 15 may be provided in the peak portion 13 of the clutch drum 11. In this case, the relationship between whether or not the through hole 15 is located in the imaging range 16 and whether the output voltage of the synchronization circuit 3 is the first voltage or the second voltage is the above-described example. Therefore, the high-speed camera 4 may set the input timing of the rising edge of the pulse signal as the imaging timing.

  In the above-described embodiment, the example in which the through hole 15 is a through-hole penetrating from the outer peripheral surface of the clutch drum 11 toward the inside is described, but the present invention is not limited thereto. As long as the inside of the clutch drum 11 is visible, the observation window may be a through hole 15 (through hole), or may be a window made of a transparent material like the visualization window 10.

DESCRIPTION OF SYMBOLS 1 Visualization apparatus 2 Visualization unit 3 Synchronous circuit 4 High speed camera 5 Illumination 6 Pressure sensor 7 ECU control apparatus 8 ECT-ECU
10 Visualization window 11 Clutch drum 12 Rotation sensor (magnetic sensor)
13 Peak 14 Valley 15 Through-hole 16 Shooting range 20 Clutch 21 Piston 22 Clutch plate 23 Friction plate 24 Spring retainer 25 Return spring 26 Hydraulic chamber 30 Oil pump 31 Valve body 32 Lubricating oil shutoff valve 40 Oil path 41 Bypass oil path

Claims (6)

A clutch operation observation device for observing the clutch engagement mechanism inside the transmission by operating in a sub-assembly state,
A clutch drum having an observation window portion that makes the engagement mechanism inside visible from an outer peripheral surface;
A photographing unit for photographing a part of the outer peripheral surface of the clutch drum;
A position detector for detecting the position of the observation window during rotation of the clutch drum,
The imaging unit photographs the engaging mechanism in operation through the observation window when the position of the observation window detected by the position detection unit is within the imaging range of the imaging unit. ,
Clutch operation observation device. The clutch operation observation device further includes:
A lubricating oil supply section for supplying lubricating oil to the clutch drum;
A valve capable of switching between supplying and shutting off the lubricating oil in an oil path from the lubricating oil supply unit to the clutch drum;
The clutch operation observation apparatus according to claim 1. The engagement mechanism engages the clutch plate provided on the inner periphery of the clutch drum, a friction plate provided on the clutch hub and engaged with the clutch plate, and the clutch plate and the friction plate. And a piston for pressing the clutch plate against the friction plate,
Each of the clutch plate, the friction plate, and the piston is coated with paint of different colors.
The clutch operation observation apparatus according to claim 1 or 2. Each of the clutch plate, the friction plate, and the piston is coated with a paint other than red.
The clutch operation observation apparatus according to claim 3. The clutch drum has a magnetic body on its outer peripheral surface, and alternately has crests and troughs on its outer peripheral surface with respect to its rotational direction,
The clutch drum has the observation window portion in one of the peak portion and the valley portion,
The position detection unit includes a magnetic sensor that detects a change in magnetism from an outer peripheral surface of the clutch drum, and a peak or valley having the observation window unit based on the change in magnetism detected by the magnetic sensor. Detecting that the part is located within the photographing range of the photographing part,
The clutch operation observation apparatus according to any one of claims 1 to 4. A clutch operation observation method for observing a clutch engagement mechanism inside a transmission by operating it in a sub-assembly state,
Detecting the position of the observation window part during rotation of the clutch drum having an observation window part enabling the internal engagement mechanism to be visually recognized from the outer peripheral surface;
When the detected position of the observation window portion is located within the photographing range of the photographing portion for photographing a part of the outer peripheral surface of the clutch drum, the engaging mechanism that is operating through the observation window portion is Shooting,
Clutch operation observation method with