JP2008025784A - Overflow plug for transmission case, drain bolt, and temperature measuring device for transmission fluid using them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an overflow plug for a transmission case, a drain bolt, and a temperature measuring device for transmission fluid capable of easily detecting a fluid temperature in an oil pan of the transmission case without carrying out oil temperature detection by an on-board computer following complicated work in replacement of transmission fluid. <P>SOLUTION: The overflow plug 22 is attached to an oil pan 20 of the transmission case 10, and it is characterized by that an oil temperature detector 30 is provided for detecting the fluid temperature in the oil pan 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a transmission case overflow plug and a drain bolt for detecting a fluid temperature in an oil pan of the transmission case, and a transmission fluid temperature measuring device using them.

  If the fluid used in the transmission of an automatic car is not used for a long period of time and continues to be used for a long time, it will deteriorate and not only increase power loss and shift shock, but also cause a failure of the transmission. Therefore, it is possible to prevent the fluid from deteriorating by exchanging the entire fluid every tens of thousands of kilometers or by exchanging only the fluid stored in the oil pan of the transmission case instead of exchanging the entire fluid. Is addressed.

  One of the methods for exchanging the fluid in the latter oil pan is to take out the old fluid from the drain hole of the oil pan and then replenish the optimum amount of new fluid with the overflow mechanism provided in the oil pan. Yes. Such an overflow mechanism is proposed in Patent Document 1, and has an arrangement in which an overflow tube 210 is erected upward from the bottom of the oil pan 200 (see FIG. 20). When replenishing the fluid 600, a sufficient amount of fluid 600 is supplied into the oil pan 200 to overflow the fluid 600 from the upper end of the overflow tube 210 to the inside thereof (see FIG. 21), and then the supply is performed. By stopping, the amount of the fluid 600 in the oil pan 200 can be accurately adjusted to the level of the upper end of the overflow tube 210.

  By the way, the amount of fluid in the transmission case needs to be adjusted more accurately than engine oil. For example, if the amount of fluid is greater than the specified amount, the fluid surface in the oil pan will come into contact with the rotating part located at the top of the oil pan and foam, causing air to enter the fluid. There is a risk of malfunction, and the fluid may overflow from the fluid injection hole. Also, if the fluid amount is less than the specified amount, the fluid will not be circulated sufficiently in the transmission, and a large amount of air will be mixed in the fluid, resulting in poor lubrication in the transmission. Can also cause the vehicle to break down.

  Further, since the fluid for transmission has a high coefficient of thermal expansion, the volume of the fluid expands as the fluid temperature rises as the vehicle travels. For this reason, even if the fluid is replaced at room temperature and the fluid amount is adjusted to the specified amount, the fluid amount in the transmission case becomes larger than the specified amount when the fluid temperature rises due to vehicle running. It was. Therefore, when the fluid is exchanged, a very troublesome operation is required in which the fluid temperature is raised to the temperature during traveling of the vehicle and the fluid amount is adjusted to the specified amount while the temperature is maintained.

Accordingly, car manufacturers provide their work methods to automobile maintenance shops and the like so that fluid replacement work and fluid amount adjustment work can be performed accurately and safely in the vehicle having the overflow mechanism.
JP 2005-61832 A

  However, car manufacturers provide equipment and equipment that can easily replace fluids at maintenance shops of their affiliates, but such equipment and equipment are not available at maintenance shops that do not belong to their own company. We are simply distributing a manual for fluid replacement, and the fluid replacement method described in this manual uses the above equipment and equipment as detailed below. As compared with the case where it carries out, it was much more troublesome. For this reason, maintenance laboratories that do not belong to the affiliates of car manufacturers have had to spend a great deal of effort to replace the fluid as compared to maintenance laboratories belonging to the affiliates. Hereinafter, an example of the fluid replacement method will be described.

  As shown in FIG. 20, an oil pan 200 provided at the lower portion of the transmission case 100 includes an overflow tube 210 that is integrally provided at the bottom, and an overflow plug 220 that is detachably attached to the overflow tube 210. , A drain hole 230 for discharging the old fluid 600 and a drain bolt 240 detachably attached to the drain hole 230 are provided. Further, the transmission case 100 includes an injection hole 110 for injecting the fluid 600 into the oil pan 200 and an injection hole plug 120 that is detachably attached to the injection hole 110.

  In replacing the fluid in the oil pan 200 having such a configuration, first, the engine of the vehicle is stopped and the temperature of the fluid 600 in the transmission case 100 is allowed to reach room temperature, and then the injection hole plug 120 and the drain bolt are connected. 240 is removed, and the old fluid 600 in the oil pan 200 is discharged from the drain hole 230 (see FIG. 22). When all the old fluid 600 is discharged, the drain bolt 240 is attached to the drain hole 230, the overflow plug 220 is removed, and then the fluid 600 is injected into the oil pan 200 from the injection hole 110 (see FIG. 21). When the fluid 600 overflows from the upper end of the overflow tube 210 and the fluid 600 starts to be discharged to the outside through the overflow tube 210, the injection of the fluid 600 is stopped.

  When the fluid 600 stops being discharged from the overflow tube 210, the overflow plug 220 is attached to the overflow tube 210. Further, after a predetermined amount of fluid 600 is injected from the injection hole 110 so that the amount of fluid 600 in the oil pan 200 becomes equal to or higher than the upper end level of the overflow tube 210, the injection hole plug 120 is attached to the injection hole 110 (FIG. 23).

  Next, in order to measure the temperature of the fluid in the transmission by the in-vehicle computer, the in-vehicle computer is set to the oil temperature detection mode by the method described in detail below.

  Here, as a vehicle shift unit, a parking range (hereinafter referred to as P range), a neutral range (hereinafter referred to as N range), a drive range (hereinafter referred to as D range), and manual 1st to 5th gears. An example is provided with a manual range (hereinafter referred to as “M range”) capable of shifting to a maximum.

  First, after predetermined two terminals are short-circuited among a plurality of terminals provided in the diagnosis connector of the vehicle, the engine is started.

  Next, after slowly shifting the shift lever from the P range to the D range, the shift lever is slowly shifted to the M range. Subsequently, the shift lever is shifted from the 5th speed to the 1st speed in the M range, and again shifted from the 1st speed to the 5th speed, and then slowly shifted to the P range. Further, after slowly shifting the shift lever from the P range to the D range, the shift lever is reciprocated several times from the D range to the N range and then from the N range to the D range. At that time, the shift lever is operated so that the stop time of the shift lever in the D range or N range is within 2 seconds / time, and the reciprocating operation of the shift lever is repeated for 8 seconds or more. If these operations are performed correctly, the D lamp of the shift indicator of the on-vehicle meter flashes once, thereby confirming that the on-vehicle computer has entered the oil temperature detection mode. Thereafter, the shift lever is shifted again to the P range, and the two short-circuited terminals in the diagnosis connector are opened.

  Once the in-vehicle computer has been changed to the fluid oil temperature detection mode in this way, the fluid is then operated by operating the accelerator in the P range in order to adjust the fluid temperature to an appropriate temperature (fluid temperature during vehicle travel). When the temperature is increased and the D lamp of the shift indicator lights up, the accelerator operation is stopped and the engine is kept idling. When the D lamp of this shift indicator lights up, it indicates that the fluid has reached the proper temperature, when it flashes it indicates that it is above the proper temperature, and if it does not turn on, it is below the proper temperature. Is shown. Therefore, while the shift indicator D lamp is lit, that is, when the fluid is at an appropriate temperature, the amount of fluid in the oil pan is adjusted as described below.

  First, the vehicle is lifted up and the overflow plug 220 is removed (see FIG. 24). At that time, if a sufficient amount of fluid 600 is discharged from the overflow tube 210, it can be confirmed that the amount of fluid 600 contained in the oil pan 200 is higher than the level at the upper end of the overflow tube 210. Therefore, if the fluid 600 stops being discharged from the overflow tube 210, the fluid 600 amount in the oil pan 200 matches the level of the upper end of the overflow tube 210, that is, the fluid 600 in the oil pan 200 is an appropriate amount. Indicates.

  Further, when the fluid 600 is not discharged from the overflow tube 210 or when only a small amount of fluid 600 is discharged from the overflow tube 210, the fluid 600 contained in the oil pan 200 is removed from the overflow tube 210. Since there is a high possibility that the level is lower than the upper end level, the fluid 600 is again injected from the injection hole 110, the fluid 600 is overflowed from the overflow tube 210, the injection of the fluid 600 is stopped, and the fluid 600 in the oil pan 200 is stopped. Adjust to an appropriate amount.

  Finally, the replacement operation is completed by attaching the overflow plug 220 to the overflow tube 210 and the injection hole plug 120 to the injection hole 110 (see FIG. 20).

  As described above, the process of setting the in-vehicle computer in the oil temperature detection mode is a particularly troublesome operation. Even if the car manufacturer is the same, the procedure is often different for each vehicle type, so even a skilled worker may make a mistake. If a shift change is made in the middle of the procedure, it is necessary to start over from the first procedure, and if the wrong terminal is shorted among the terminals in the diagnosis connector, the vehicle may break down. is there.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its purpose is to detect the fluid temperature in the oil pan of the transmission case without performing the oil temperature detection by the in-vehicle computer that involves complicated work when replacing the fluid of the transmission. It is an object of the present invention to provide a transmission case overflow plug, a drain bolt, and a transmission fluid temperature measuring device that can be easily detected.

  In order to solve the above problem, the overflow plug of the transmission case of the present invention is an overflow plug attached to the oil pan of the transmission case, and is provided with an oil temperature detector for detecting the fluid temperature in the oil pan. It is characterized by.

  The drain bolt of the transmission case according to the present invention is a drain bolt attached to the oil pan of the transmission case, and is characterized in that an oil temperature detector for detecting the fluid temperature in the oil pan is provided.

  According to the present invention, since the oil temperature detector for detecting the fluid temperature in the oil pan is provided on the overflow plug or the drain bolt, the vehicle is mounted on the vehicle when detecting the fluid temperature in the oil pan. There is no need to use a computer.

  As a result, there is no need to perform the work of short-circuiting the terminals in the diagnosis connector of the vehicle and the troublesome work such as finely set shift changes, which are necessary for setting the in-vehicle computer to the oil temperature detection mode. .

  Therefore, the work time for adjusting the fluid amount in the oil pan can be shortened, the work can be easily performed even by an unskilled worker, and the vehicle is not damaged by an erroneous operation during the work.

  In addition, the transmission fluid temperature measuring device of the present invention is connected to the overflow plug or the drain bolt and an oil temperature detector of the overflow plug or the drain bolt, and the oil pan detected by the oil temperature detector. And a temperature display device for displaying the fluid temperature inside.

  According to the present invention, the overflow plug or drain bolt is provided with the temperature display device that displays the fluid temperature in the oil pan. Therefore, the fluid temperature in the oil pan of the transmission can be easily displayed by the temperature display device. Can be confirmed.

  The overflow plug, the drain bolt, and the transmission fluid temperature measuring device of the transmission case according to the present invention do not detect the oil temperature by the in-vehicle computer, which is a cumbersome operation in the transmission fluid replacement operation. The fluid temperature in the oil pan can be easily detected.

  Embodiments of the present invention will be described below with reference to the drawings.

[Embodiment 1]
FIG. 1 is a schematic diagram showing a temperature measuring apparatus for transmission fluid in the present embodiment.

  The transmission fluid temperature measurement device 50 according to the present embodiment includes an overflow plug 22 and a temperature display device 40.

  As shown in FIG. 1, the overflow plug 22 is detachably attached to an overflow tube 21 of an oil pan 20 provided at the lower portion of the transmission case 10. When the overflow plug 22 is attached, the overflow tube 21 is closed. Is something that can be done. The overflow plug 22 is provided with an oil temperature detector 30 that detects the temperature of the fluid 60 in the oil pan 20.

  The oil temperature detector 30 is not particularly limited as long as it can detect the temperature of the fluid 60 in the oil pan 20 with the overflow plug 22 attached to the oil pan 20. As shown in FIG. 1, a temperature sensor 31 is provided at the front end of the overflow plug 22, and an output terminal 32 for outputting the temperature detected by the temperature sensor 31 is provided at the rear end.

  Further, the temperature of the fluid 60 may be confirmed by attaching a temperature display device 40 to be described later to the oil temperature detector 30, but the temperature of the fluid 60 is within the proper temperature range for the oil temperature detector 30 itself. You may provide the alerting | reporting means which alert | reports. In that case, the notifying means is not particularly limited, and examples thereof include those that are visually informed by lighting or blinking using lamps or LEDs, and those that are audibly informed by a buzzer or the like.

  The temperature display device 40 is connected to the oil temperature detector 30 of the overflow plug 22 to display the temperature of the fluid 60 in the oil pan 20 detected by the oil temperature detector 30. The temperature display device 40 is not particularly limited as long as it visually displays the temperature of the fluid 60. For example, a device that displays the temperature digitally, a device that displays the temperature in analog, and a lamp or LED. The one used to indicate that the temperature is in the proper range.

  Next, a procedure for replacing the fluid 60 in the oil pan 20 using the transmission fluid temperature measuring device 50 according to the present embodiment will be described.

  As shown in FIG. 2, an oil pan 20 provided at the lower portion of the transmission case 10 includes an overflow tube 21 erected integrally at the bottom, and an overflow plug 220 detachably attached to the overflow tube 21. The drain hole 23 for discharging the old fluid 60 and the drain bolt 24 detachably attached to the drain hole 23 are provided. Further, the transmission case 10 includes an injection hole 11 for injecting the fluid 60 into the oil pan 20 and an injection hole plug 12 that is detachably attached to the injection hole 11.

  First, the old fluid 60 in the oil pan 20 is removed and the new fluid 60 is replenished (hereinafter referred to as the first step).

  After the engine of the vehicle is stopped and the temperature of the fluid 60 in the transmission case 10 reaches normal temperature, the injection hole plug 12 and the drain bolt 24 are removed, and the old fluid 60 in the oil pan 20 is removed from the drain hole 23. Is discharged (see FIG. 3). When all the old fluid 60 is discharged, the drain bolt 24 is attached to the drain hole 23, and then the overflow plug 220 is removed, and then the fluid 60 is injected into the oil pan 20 from the injection hole 11 as indicated by the arrow in the figure ( (See FIG. 4). When the fluid 60 overflows from the upper end of the overflow tube 21 and the fluid 60 begins to be discharged to the outside through the overflow tube 21, the injection of the fluid 60 is stopped.

  When the fluid 60 stops being discharged from the overflow tube 21, the overflow plug 22 according to the present embodiment is attached to the overflow tube 21 in place of the previously removed overflow plug 220. In this state, the amount of the new fluid 60 in the oil pan 20 matches the level of the upper end of the overflow tube 21, but if the transmission is operated and the fluid 60 is circulated as it is, the amount of the fluid 60 is insufficient. Therefore, a predetermined amount of fluid 60 is injected from the injection hole 11 so that the amount of fluid 60 in the oil pan 20 becomes equal to or higher than the upper end level of the overflow tube 21 (see FIG. 5). In addition, when adjusting the amount of fluid 60 in the third step, which will be described later, it is easier to work if the amount of fluid 60 in oil pan 20 is equal to or higher than the level of the upper end of overflow tube 21. it can.

  Thereafter, the injection hole plug 12 is attached to the injection hole 11 so that the fluid 60 does not leak from the injection hole 11 when starting in the next step.

  Next, the temperature of the fluid 60 in the transmission is set to an appropriate temperature (hereinafter referred to as the second step).

  After the temperature display device 40 is attached to the output terminal 32 at the rear end of the overflow plug 22 (see FIG. 1), the vehicle engine is started to increase the temperature of the fluid 60 in the transmission. At that time, while checking the temperature of the fluid 60 with the temperature display device 40, the temperature of the fluid 60 can be set by keeping the engine idling or by operating the accelerator with the shift lever held in the P range. The temperature is raised and controlled to an appropriate temperature range, and kept at that temperature.

  Next, the fluid 60 at an appropriate temperature is adjusted to an appropriate amount in the oil pan 20 (hereinafter referred to as a third step).

  The vehicle is lifted up and the overflow plug 22 is removed while the temperature of the fluid 60 represented by the temperature display device 40 is in the appropriate temperature range (see FIG. 6). At that time, if a sufficient amount of fluid 60 is discharged from the overflow tube 21, it can be confirmed that the fluid 60 contained in the oil pan 20 is higher than the level at the upper end of the overflow tube 21. Therefore, when the discharge of the fluid 60 from the overflow tube 21 stops, the amount of the fluid 60 in the oil pan 20 matches the level at the upper end of the overflow tube 21, that is, the fluid 60 in the oil pan 20 has reached an appropriate amount. Is shown.

  When the fluid 60 is not discharged from the overflow tube 21 or when only a small amount of fluid 60 is discharged from the overflow tube 21, the fluid 60 contained in the oil pan 20 is removed from the overflow tube 21. Since there is a high possibility that the level is lower than the upper end level, the fluid 60 is again injected from the injection hole 11 and the fluid 60 overflows from the overflow tube 21, and then the injection of the fluid 60 is stopped, and the fluid 60 in the oil pan 20 is stopped. Adjust to an appropriate amount.

  Finally, the replacement work is completed by attaching the overflow plug 22 to the overflow tube 21 and the injection hole plug 12 to the injection hole 11 (see FIG. 7).

  As described above, the fluid 60 in the oil pan 20 is replaced using the transmission fluid temperature measuring device 50 according to the present embodiment.

  In the above replacement procedure, the overflow plug 22 of the present embodiment is used as it is. Therefore, when the amount of the fluid 60 in the oil pan 20 is confirmed or adjusted later, Those operations can be easily performed using the overflow plug 22 as it is. Also, in the above-described replacement procedure of the fluid 60, the overflow plug 22 of the present embodiment is used only when the temperature of the fluid 60 is detected in the second step, and when the temperature detection is completed, it is returned to the original overflow plug 220. Also good.

[Embodiment 2]
FIG. 8 is a schematic diagram showing a temperature measuring apparatus 50 for transmission fluid in the present embodiment.

  The transmission fluid temperature measurement device 50 according to the present embodiment includes an overflow plug 22 and a temperature display device 40.

  The transmission fluid temperature measuring device 50 according to the present embodiment has the same configuration as that of the first embodiment except for the first step of the replacement procedure of the fluid 60. Thus, the description thereof is omitted, and the first step of the fluid 60 replacement procedure, which is a difference, will be described.

  A procedure for replacing the fluid 60 in the oil pan 20 using the transmission fluid temperature measuring device 50 according to the present embodiment will be described.

  FIG. 9 is a schematic view showing the transmission case 10. The oil pan 20 provided at the lower part of the transmission case 10 has a drain hole 23 for discharging the old fluid 60 and an overflow tube 21 that is detachably attached to the drain hole 23 so as to stand upright at the bottom of the oil pan 20. And an overflow plug 220 that is detachably attached to the overflow tube 21. Further, the transmission case 10 includes an injection hole 11 for injecting the fluid 60 into the oil pan 20 and an injection hole plug 12 that is detachably attached to the injection hole 11.

  First, the old fluid 60 in the oil pan 20 is removed and the new fluid 60 is replenished.

  After the vehicle engine is stopped and the temperature of the fluid 60 in the transmission case 10 reaches normal temperature, the injection hole plug 12 and the overflow plug 220 are removed, and then the overflow tube 21 is removed from the drain hole 23, and the drain The old fluid 60 in the oil pan 20 is discharged from the hole 23 (see FIG. 10). When all the old fluid 60 is discharged, the overflow tube 21 is attached to the drain hole 23, and the fluid 60 is injected into the oil pan 20 from the injection hole 11 as shown by the arrow in the figure (see FIG. 11). When the fluid 60 overflows from the upper end of the overflow tube 21 and the fluid 60 begins to be discharged to the outside through the overflow tube 21, the injection of the fluid 60 is stopped.

  When the fluid 60 stops being discharged from the overflow tube 21, the overflow plug 22 according to the present embodiment is attached to the overflow tube 21 in place of the previously removed overflow plug 220. In this state, the amount of the new fluid 60 in the oil pan 20 matches the level of the upper end of the overflow tube 21, but if the transmission is operated and the fluid 60 is circulated as it is, the amount of the fluid 60 is insufficient. Therefore, a predetermined amount of fluid 60 is injected from the injection hole 11 so that the amount of fluid 60 in the oil pan 20 becomes equal to or higher than the upper end level of the overflow tube 21 (see FIG. 12). In addition, when adjusting the amount of fluid 60 in the third step to be described later, the operation can be easily performed if the amount of fluid 60 in oil pan 20 is equal to or higher than the level of the upper end of overflow tube 21. .

  Thereafter, the injection hole plug 12 is attached to the injection hole 11 so that the fluid 60 does not leak from the injection hole 11 when the engine is started in the next step.

  Next, the second process of setting the temperature of the fluid 60 in the transmission to an appropriate temperature and the third process of adjusting the fluid 60 of the appropriate temperature to an appropriate amount in the oil pan 20 are performed to complete the replacement work (FIG. 13). reference).

  As described above, the fluid 60 in the oil pan 20 is replaced using the transmission fluid temperature measuring device 50 according to the present embodiment.

  In the above replacement procedure, the overflow plug 22 of the present embodiment is used as it is. Therefore, when the amount of the fluid 60 in the oil pan 20 is confirmed or adjusted later, Those operations can be easily performed using the overflow plug 22 as it is. Also, in the above-described replacement procedure of the fluid 60, the overflow plug 22 of the present embodiment is used only when the temperature of the fluid 60 is detected in the second step, and when the temperature detection is completed, it is returned to the original overflow plug 220. Also good.

[Embodiment 3]
FIG. 14 is a schematic diagram showing a transmission fluid temperature measuring apparatus 50 in the present embodiment.

  The transmission fluid temperature measuring device 50 in this embodiment includes a drain bolt 24 and a temperature display device 40.

  Note that the transmission fluid temperature measuring device 50 of the present embodiment has the same configuration as that of the first embodiment described above, since the third step of the replacement procedure of the temperature display device 40 and the fluid 60 has the same configuration. Are denoted by the same reference numerals, and the description thereof is omitted. The first and second steps of the replacement procedure of the drain bolt 24 and the fluid 60, which are different points, will be described.

  As shown in FIG. 14, the drain bolt 24 is detachably attached to a drain hole 23 of an oil pan 20 provided at the lower part of the transmission case 10. When the drain bolt 24 is attached, the drain hole 23 is closed. Is something that can be done. Further, the drain bolt 24 is provided with an oil temperature detector 30 for detecting the temperature of the fluid 60 in the oil pan 20.

  The oil temperature detector 30 is not particularly limited as long as it can detect the temperature of the fluid 60 in the oil pan 20 with the drain bolt 24 attached to the oil pan 20. For example, As shown in FIG. 14, a temperature sensor 31 is provided at the front end of the drain bolt 24, and an output terminal 32 for outputting the temperature detected by the temperature sensor 31 is provided at the rear end.

  Moreover, although the temperature of the fluid 60 may be confirmed by attaching the temperature display device 40 to the oil temperature detector 30, the oil temperature detector 30 itself notifies that the temperature of the fluid 60 is within the appropriate temperature range. Notification means may be provided. In that case, the notifying means is not particularly limited, and examples thereof include those that are lit and blinked using a lamp or LED and visually notified, and those that are audibly notified using a buzzer or the like.

  Next, a procedure for replacing the fluid 60 in the oil pan 20 using the transmission fluid temperature measuring device 50 according to the present embodiment will be described.

  As shown in FIG. 15, the oil pan 20 provided at the lower portion of the transmission case 10 includes an overflow tube 21 that is integrally provided on the bottom of the oil pan 20 and an overflow that is detachably attached to the overflow tube 21. A plug 22, a drain hole 23 for discharging the old fluid 60, and a drain bolt 240 detachably attached to the drain hole 23 are provided. Further, the transmission case 10 includes an injection hole 11 for injecting the fluid 60 into the oil pan 20 and an injection hole plug 12 that is detachably attached to the injection hole 11.

  First, the old fluid 60 in the oil pan 20 is removed and the new fluid 60 is replenished.

  After the engine of the vehicle is stopped and the temperature of the fluid 60 in the transmission case 10 reaches normal temperature, the injection hole plug 12 and the drain bolt 240 are removed, and the old fluid 60 in the oil pan 20 is removed from the drain hole 23. Is discharged (see FIG. 16). When all the old fluid 60 is discharged, the drain bolt 24 according to the present embodiment is attached to the drain hole 23 in place of the drain bolt 240 previously removed. Next, after removing the overflow plug 22, the fluid 60 is injected into the oil pan 20 from the injection hole 11 as shown by the arrow in the figure (see FIG. 17). When the fluid 60 overflows from the upper end of the overflow tube 21 and the fluid 60 begins to be discharged to the outside through the overflow tube 21, the injection of the fluid 60 is stopped.

  When the fluid 60 stops being discharged from the overflow tube 21, the overflow plug 22 is attached to the overflow tube 21. In this state, the amount of the new fluid 60 in the oil pan 20 matches the level of the upper end of the overflow tube 21, but if the transmission is operated and the fluid 60 is circulated as it is, the amount of the fluid 60 is insufficient. Therefore, a predetermined amount of fluid 60 is injected from the injection hole 11 so that the amount of fluid 60 in the oil pan 20 becomes equal to or higher than the upper end level of the overflow tube 21 (see FIG. 18). In addition, when adjusting the amount of fluid 60 in the third step, which will be described later, it is easier to work if the amount of fluid 60 in oil pan 20 is equal to or higher than the level of the upper end of overflow tube 21. it can.

  Thereafter, the injection hole plug 12 is attached to the injection hole 11 so that the fluid 60 does not leak from the injection hole 11 when starting in the next step.

  Next, the temperature of the fluid 60 in the transmission is set to an appropriate temperature.

  After the temperature display device 40 is attached to the output terminal 32 at the rear end of the drain bolt 24 (see FIG. 14), the vehicle engine is started to increase the temperature of the fluid 60 in the transmission. At that time, while checking the temperature of the fluid 60 with the temperature display device 40, the temperature of the fluid 60 is increased by keeping the engine in an idling state or by operating the accelerator while holding the shift lever in the P range. The temperature is controlled to an appropriate temperature range and kept at that temperature.

  Finally, the third step of adjusting the fluid 60 at the appropriate temperature to the appropriate amount in the oil pan 20 is performed, and the replacement operation is completed (see FIG. 19).

  As described above, the fluid 60 in the oil pan 20 is replaced using the transmission fluid temperature measuring device 50 according to the present embodiment.

1 is a schematic diagram showing a temperature measuring device for transmission fluid according to Embodiment 1. FIG. FIG. 3 is a schematic diagram showing a transmission case before fluid replacement is performed in the first embodiment. It is the schematic which shows the state which has discharged | emitted the old fluid in the 1st process of the fluid replacement | exchange procedure of Embodiment 1. FIG. It is the schematic which shows the state which poured the fluid from the injection hole in the 1st process of the fluid replacement | exchange procedure of Embodiment 1, and overflowed the fluid from the overflow tube. It is the schematic which shows the state which injected the fluid from the injection hole further in the 1st process of the fluid replacement | exchange procedure of Embodiment 1. FIG. It is the schematic which shows the state which is adjusting the fluid amount in the 3rd process of the fluid replacement | exchange procedure of Embodiment 1. FIG. FIG. 3 is a schematic diagram showing a transmission case in which fluid replacement is completed in the first embodiment. FIG. 6 is a schematic diagram showing a transmission fluid temperature measuring apparatus according to a second embodiment. 6 is a schematic diagram showing a transmission case before fluid replacement is performed in Embodiment 2. FIG. It is the schematic which shows the state which has discharged | emitted the old fluid in the 1st process of the fluid replacement | exchange procedure of Embodiment 2. FIG. It is the schematic which shows the state which poured the fluid from the injection hole in the 1st process of the fluid exchange procedure of Embodiment 2, and overflowed the fluid from the overflow tube. It is the schematic which shows the state which injected the fluid from the injection hole further in the 1st process of the fluid replacement | exchange procedure of Embodiment 2. FIG. 6 is a schematic diagram showing a transmission case in which fluid replacement is completed in Embodiment 2. FIG. FIG. 6 is a schematic diagram showing a transmission fluid temperature measuring apparatus according to a third embodiment. FIG. 10 is a schematic diagram showing a transmission case before fluid replacement is performed in the third embodiment. It is the schematic which shows the state which has discharged | emitted the old fluid in the 1st process of the fluid replacement | exchange procedure of Embodiment 3. FIG. FIG. 10 is a schematic view showing a state in which fluid is injected from an injection hole and fluid is overflowed from an overflow tube in the first step of the fluid exchange procedure of the third embodiment. It is the schematic which shows the state which injected the fluid from the injection hole further in the 1st process of the fluid replacement | exchange procedure of Embodiment 3. FIG. FIG. 10 is a schematic diagram showing a transmission case in which fluid replacement is completed in the third embodiment. It is the schematic which shows the conventional transmission case. It is the schematic which shows the overflow mechanism of a transmission case. It is the schematic which shows the state which has discharged | emitted the old fluid in the conventional fluid replacement | exchange procedure. It is the schematic which shows the state which inject | poured the new fluid in the conventional fluid exchange procedure. It is the schematic which shows the state which is adjusting the fluid amount in the conventional fluid replacement | exchange procedure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Transmission case 20 Oil pan 22 Overflow plug 24 Drain bolt 30 Oil temperature detector 40 Temperature display apparatus 50 Temperature measurement apparatus

Claims (3)

An overflow plug attached to the oil pan of the transmission case,
An overflow plug for a transmission case, comprising an oil temperature detector for detecting a fluid temperature in the oil pan. A drain bolt attached to the oil pan of the transmission case,
A drain bolt for a transmission case, wherein an oil temperature detector for detecting a fluid temperature in the oil pan is provided. The overflow plug according to claim 1 or the drain bolt according to claim 2,
A temperature display device connected to the oil temperature detector of the overflow plug or drain bolt and displaying the fluid temperature in the oil pan detected by the oil temperature detector;
A temperature measuring device for transmission fluid, comprising:

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