WO2017163654A1 - 自動変速機用オイルポンプの空気抜き構造及び空気抜き構造組み付け方法 - Google Patents
自動変速機用オイルポンプの空気抜き構造及び空気抜き構造組み付け方法 Download PDFInfo
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- WO2017163654A1 WO2017163654A1 PCT/JP2017/004842 JP2017004842W WO2017163654A1 WO 2017163654 A1 WO2017163654 A1 WO 2017163654A1 JP 2017004842 W JP2017004842 W JP 2017004842W WO 2017163654 A1 WO2017163654 A1 WO 2017163654A1
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- WIPO (PCT)
- Prior art keywords
- air vent
- tube
- oil
- pump
- automatic transmission
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0443—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control for supply of lubricant during tilt or high acceleration, e.g. problems related to the tilt or extreme acceleration of the transmission casing and the supply of lubricant under these conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0053—Venting means for starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
- F16H57/0404—Lubricant filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0441—Arrangements of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
- F16H57/0446—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control the supply forming part of the transmission control unit, e.g. for automatic transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
- F16H57/0452—Oil pans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/60—Assembly methods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/805—Fastening means, e.g. bolts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/806—Pipes for fluids; Fittings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/18—Pressure
- F04C2270/185—Controlled or regulated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H2061/004—Venting trapped air from hydraulic systems
Definitions
- the present invention relates to an air vent structure and an air vent structure assembly method for an oil pump for an automatic transmission that removes air bubbles contained in transmission hydraulic oil during operation of the oil pump.
- the air vent hole and the air vent passage are straight roads extending in the vehicle vertical direction, and the opening end of the air vent passage is the vehicle oil in the oil oil filling region into the oil pan in a plan view. It arrange
- the present invention has been made paying attention to the above problems, and has an air vent structure for an oil pump for an automatic transmission that prevents the transmission of transmission hydraulic oil in the oil pump even when the road surface slope angle is large when parking on a slope road.
- the purpose is to provide.
- transmission hydraulic fluid driven by a travel drive source and stored in an oil pan is sucked from a suction port via a strainer, and pressurized transmission hydraulic fluid is supplied to a control valve unit via a discharge port.
- An oil pump is provided.
- As an air vent structure for removing air bubbles contained in transmission hydraulic oil during pump operation one end communicates with the discharge port and the other end has an air vent passage that opens toward the oil pan.
- the opening end of the air vent passage is arranged at a position where it is in the oil of the transmission hydraulic oil even when the slope road is parked.
- the opening end of the air vent passage is arranged at a position where it is in the transmission hydraulic oil even when parking on the slope road. As a result, it is possible to prevent the transmission hydraulic fluid from being removed from the oil pump even when the road surface gradient angle is large when parking on the slope road.
- the air vent structure and the air vent structure assembly method of the oil pump for an automatic transmission in the embodiment are applied to a pickup truck equipped with a diesel engine and a vertical automatic transmission (seventh forward speed).
- a pickup truck equipped with a diesel engine and a vertical automatic transmission eventh forward speed.
- the configuration of the air vent structure of the oil pump for an automatic transmission according to the embodiment will be described by dividing it into “overall configuration” and “detailed configuration of the air vent structure”.
- FIG. 1 is a longitudinal side view showing an automatic transmission to which an air vent structure of an oil pump according to an embodiment is applied
- FIG. 2 is a partially broken front view showing the automatic transmission. The overall configuration will be described below with reference to FIGS.
- the automatic transmission 1 to which the oil pump air vent structure of the embodiment is applied includes a transmission case 2, a transmission mechanism 3, an oil pump 4, a control valve unit 5, A strainer 6 and an oil pan 7 are provided.
- a transmission mechanism 3 is housed in a space inside the case, and an oil pump 4 is disposed on the front side of the vehicle.
- the transmission mechanism 3 includes a plurality of planetary gears (not shown) and a plurality of transmission elements (not shown) (multi-plate clutch, multi-plate brake, one-way clutch, etc.).
- the automatic transmission 1 determines a shift element to be hydraulically engaged at each shift stage, uses the oil pump 4 as a hydraulic source, and supplies the shift hydraulic pressure generated by the control valve unit 5 to the shift element determined at each shift stage. Thus, a plurality of shift speeds are obtained.
- the shifting hydraulic pressure is supplied to the starting element and fastened, and the driving force from the diesel engine (traveling drive source) is converted into torque.
- the power is transmitted to the drive wheels via the converter and the speed change mechanism 3 to start.
- the starting element refers to a speed change element that is hydraulically engaged at the D range first speed stage or the R range first speed stage.
- the oil pump 4 includes an internal gear pump mechanism 42 having a rotor gear driven by a transmission input shaft 41 to the transmission mechanism 3 via a diesel engine and a torque converter (not shown).
- the internal gear pump mechanism 42 is built in a spatial position formed by a pump housing 43 attached to the transmission case 2 and a disc-shaped pump cover 44 fixed to the pump housing 43, and is connected to the transmission mechanism 3.
- a shaft hole 45 through which the transmission input shaft 41 passes is provided.
- the oil pump 4 sucks the transmission hydraulic oil ATF stored in the oil pan 7 from the suction port 47 through the strainer 6 and the suction passage 46 while the pump is driven. Then, the transmission hydraulic fluid ATF pressurized by the internal gear pump mechanism 42 is supplied to the control valve unit 5 via the discharge port 48 and the discharge passage 49.
- the control valve unit 5 is a unit structure that is disposed and fixed at a lower position of the transmission case 2 and has a plurality of spool valves, accumulators, orifices, and the like.
- the control valve unit 5 adjusts the line pressure based on the pump discharge oil supplied from the oil pump 4, creates a shift oil pressure based on the line pressure as a base pressure, and is fastened through a predetermined oil passage. Supply to the element.
- the strainer 6 is integrally bolted to the lower position of the control valve unit 5 and has a filter for removing impurities contained in the transmission hydraulic fluid ATF.
- an oil suction port 61 for sucking transmission hydraulic oil ATF stored in the oil pan 7 opens downward toward the oil pan 7.
- the oil pan 7 is an oil receiver which is bolted to a rectangular mating surface 2a opened at the bottom of the transmission case 2 and stores the transmission hydraulic oil ATF therein. As shown in FIGS. 1 and 2, when the oil pump 4 is stopped, the oil pan 7 has a specified level so that the portion excluding the upper part of the control valve unit 5 and the entire strainer 6 are immersed. The transmission hydraulic fluid ATF is stored.
- FIG. 3 is a bottom view showing a state in which the oil pan 7 is removed in the automatic transmission to which the air vent structure of the oil pump according to the embodiment is applied.
- FIG. 4 is a perspective view of a main part showing a state in which the oil pan 7 is removed.
- the air vent structure for removing air bubbles contained in the transmission hydraulic oil ATF during pump operation includes an air vent hole 8, a plate adapter 9, and an air vent tube 10. Yes.
- the air vent hole 8 is a hole extending in the vehicle vertical direction from a position adjacent to the discharge port 48 of the oil pump 4, and one end communicates with the discharge port 48 of the oil pump 4 through the choke hole 81, and the other end is oil. Open downward toward the pan 7.
- the choke hole 81 has a small cross-sectional area like the orifice hole and has a longer hole length than the orifice hole.
- a groove is provided on the mating surface of the pump housing 43 and the pump cover 44. Formed with. That is, during the pump operation, the pressurized transmission hydraulic fluid ATF is supplied to the control valve unit 5 through the discharge passage 49 from the discharge port 48 of the oil pump 4.
- a choke hole 81 is provided at a position branched from the discharge port 48 in order to remove air bubbles contained in the transmission hydraulic fluid ATF while ensuring the supply of the pressurized transmission hydraulic fluid ATF to the control valve unit 5.
- the opening end 8 a of the air vent hole 8 is from a central region where the strainer 6 and the control valve unit 5 are arranged in a rectangular hydraulic oil filling region into the oil pan 7 in a plan view. It is arranged at the corner position of the pump-side space PS that deviates to the vehicle front side.
- the plate adapter 9 is fixed to the opening end position of the air vent hole 8 formed in the transmission case 2 (case member) by two bolts 21 and 22, and is in a sealed state. It is a part for inserting and connecting the air vent tube 10 while maintaining.
- the plate adapter 9 has a substantially parallelogram shape with a thickness that secures the insertion amount of the air vent tube 10, and as shown in FIG. 5, a tube insertion hole 91 that penetrates the center of the plate adapter 9 and communicates with the air vent hole 8. Is formed.
- the tube insertion hole 91 is polished on the inner surface of the hole so as to obtain high surface accuracy in order to maintain a sealed state with the air vent tube 10.
- the air vent tube 10 is connected to the open end 8a of the air vent hole 8 via a plate adapter 9, and an air vent passage communicating with the air vent hole 8 is formed by the inner surface of the tube.
- the air vent tube 10 extends from the connection position with the air vent hole 8 to a strainer lower gap region A sandwiched between the strainer 6 and the oil pan 7 as shown in FIG. And the tube opening end 10a of the air vent tube 10 is arrange
- the connection position of the air vent tube 10 with the air vent hole 8 is the front side of the vehicle and the discharge port 48 side in the rectangular hydraulic oil filling region to the oil pan 7 in plan view. It becomes a corner position.
- the tube opening end 10 a of the air vent tube 10 is a strainer lower portion position, and becomes a central region in a rectangular hydraulic oil filling region into the oil pan 7 in a plan view.
- the air vent tube 10 connecting two positions separated in the rectangular hydraulic oil filling region includes the first tube portion 11, the second tube portion 12, and the third tube portion. 13, a connector 14, and a reinforcing plate 15.
- the first tube portion 11 is connected to the air vent hole 8 via a plate adapter 9 and extends downward in the vehicle.
- the second tube portion 12 is bent from the first tube portion 11 and extends in the direction perpendicular to the pump axis through the pump-side space PS.
- the third tube portion 13 is bent from the second tube portion 12 and extends in the pump axial direction along the bottom surface of the oil pan 7, and the terminal surface is the tube opening end 10a.
- the connector 14 is provided at the end position of the first tube portion 11, and is inserted into the tube insertion hole 91 of the plate adapter 9, and the outer peripheral position of the cylindrical portion 14 a. And a flange portion 14b having an outer diameter larger than that of the tube insertion hole 91. As shown in FIG. 5, a ring groove 14c is formed in the cylindrical portion 14a, and an O-ring 14d (seal ring) is attached to the ring groove 14c.
- the reinforcing plate 15 is provided along a midway position between the second tube portion 12 and the third tube portion 13 from a part of the first tube portion 11 in the air vent tube 10.
- the reinforcing plate 15 has a shape that surrounds a part of the cylindrical cross section of the air vent tube 10 and exerts a reinforcing function.
- a tube fixing bracket 15a for fixing the air vent tube 10 is provided from the portion surrounding the second tube portion 12.
- a bolt hole 15b (FIG. 13) formed in the tube fixing bracket 15a is provided with a fastening bolt 16 for fixing the air vent tube 10 to the transmission case 2 together with the control valve unit 5.
- the action in the embodiment is divided into “release action in oil when parking on slope road”, “other characteristic action of air vent structure”, “air vent structure assembly method”, and “other characteristic action of air vent structure assembly method”. To do.
- the desired transmission hydraulic fluid is not discharged from the oil pump until the air in the pump oil passage is exhausted from the start of driving the pump. Therefore, even if the start selection operation is performed with the intention of starting after the engine is started, the start by the engine driving force cannot be performed while the start element is not hydraulically fastened.
- the rotational speed is lower than that of a gasoline engine, and a long waiting time is required from the time the oil pump is driven by starting the engine until the air in the oil passage of the oil pump is exhausted. Cost.
- an air vent passage is added, and an air vent structure in which the open end of the air vent passage is arranged in the oil of the transmission hydraulic fluid is compared.
- this comparative example during flat road parking, the state where the opening end of the air vent passage is arranged in the oil of the transmission hydraulic fluid is maintained, so that the transmission of the hydraulic fluid is prevented when the engine is stopped. be able to.
- the transmission case tilts so that the front side of the transmission is raised and the rear side of the transmission is lowered.
- the oil is inclined such that the oil level on the front side of the vehicle is lowered and the oil level on the rear side of the vehicle is raised.
- the uphill road oil level B there is a limit to the uphill slope ratio that can secure the arrangement in the oil at the opening end of the air vent passage.
- the opening end of the air vent passage comes off from the oil of the transmission hydraulic fluid and is released in the case.
- the right slope road oil level C among the left and right slope roads as shown in FIG.
- the air vent tube 10 communicating with the air vent hole 8 is extended from the connection position with the air vent hole 8 to the strainer lower gap region A sandwiched between the strainer 6 and the oil pan 7. .
- the tube opening end 10a is arranged in the transmission hydraulic oil ATF at the strainer lower position.
- the strainer 6 having the oil suction port 61 is arranged at the lower center position of the oil pan 7 so that the arrangement in the oil is secured even during the pump operation in which the oil level of the transmission hydraulic oil ATF varies greatly. Focusing on this point, as the air vent structure element, the air vent tube 10 having a high degree of freedom in handling by bending is selected, and the tube opening end 10a is arranged in the oil of the transmission hydraulic fluid ATF at the strainer lower position. It was adopted. For this reason, the arrangement of the tube opening end 10a in the oil is maintained even when parking on a gradient road having the largest road surface gradient angle assumed for a gradient road that can be parked, and the oil pump 4 is provided via the air vent structure. Air does not enter the oil passage.
- the verification result of whether the air vent structure of the example can cope with the market gradient is as follows.
- the uphill road oil level E is obtained when the uphill slope road has an uphill slope angle ⁇ 1 corresponding to the maximum value of uphill slope roads around the world where the vehicle can be parked.
- the state where the tube opening end 10a of the air vent tube 10 is arranged in the oil of the transmission hydraulic fluid ATF is maintained.
- the state of being placed in the ATF oil is maintained.
- the transmission in the oil pump 4 is operated by measures that can cope with the road slope in the world market. It was confirmed that oil ATF can be prevented from coming off.
- the square opening oil 10 to the oil pan 7 in the plan view of the tube opening end 10a of the air vent tube 10 is used. It can be adjusted by bringing it closer to the center position of the filling region (point H in FIG. 3).
- the plate adapter 9 for inserting and connecting the air vent tube 10 is fixed to the transmission case 2 in which the air vent hole 8 is formed while maintaining a sealed state with the tube insertion hole 91.
- the plate adapter 9 for inserting and connecting the air vent tube 10 is fixed to the transmission case 2 in which the air vent hole 8 is formed while maintaining a sealed state with the tube insertion hole 91.
- the plate adapter 9 is added as a separate part, it can be entrusted not to the transmission case 2 but to the inner surface processing of the tube insertion hole 91 of the plate adapter 9, and the transmission case 2 can be easily processed. Become.
- the air vent tube 10 includes a first tube portion 11, a second tube portion 12, and a third tube portion 13.
- the first tube portion 11 is connected to the air vent hole 8 and extends downward in the vehicle.
- the second tube portion 12 is bent from the first tube portion 11 and extends in the direction perpendicular to the pump axis through the pump side space PS.
- the third tube portion 13 is bent from the second tube portion 12 so as to extend along the bottom surface of the oil pan 7 in the pump shaft direction, and the terminal surface is the tube opening end 10a.
- the opening end 8a of the air vent hole 8 is a corner portion of the pump side space PS that is out of the central region where the strainer 6 and the control valve unit 5 are arranged in the hydraulic oil filling region to the oil pan 7 in plan view. Placed in position. Therefore, the connection position with the air vent hole 8 of the air vent tube 10 and the strainer lower position where the tube opening end 10a is disposed are separated from each other in the rectangular hydraulic oil filling region, as shown in FIG.
- a pattern 1 that connects the two positions with a straight line
- a pattern 2 that is bent from the pump axis direction to the pump axis orthogonal direction
- a pattern 3 that is bent from the pump axis orthogonal direction to the pump axis direction (implementation) Example).
- pattern 1 and pattern 2 it is necessary to form a complicated bending shape so as to avoid contact interference with the control valve unit 5 and the strainer 6 immediately after the connection position with the air vent hole 8.
- the pump side space PS can be effectively utilized, and the second tube portion 12 can be formed into a straight line passing through the pump side space PS.
- the air vent tube 10 can be extended to the lower position of the strainer while avoiding contact interference with the control valve unit 5 and the strainer 6 while having a simple bent shape.
- the first tube portion 11 is provided with the connector 14 having the flange portion 14b whose outer diameter is larger than that of the tube insertion hole 91. That is, when the air vent tube 10 is attached to the plate adapter 9, the adapter side end of the air vent tube 10 with the O-ring 14 d is inserted into the tube insertion hole 91 of the plate adapter 9. At this time, if the connector 14 does not have the flange 14b, the air vent tube 10 may be overinserted to a position where the sealing function is impaired. On the other hand, since the connector 14 has the flange portion 14b, excessive insertion of the air vent tube 10 is prevented.
- the reinforcing plate 15 is provided along the air vent tube 10, and the tube fixing bracket 15 a for fixing the air vent tube 10 is provided integrally with the reinforcing plate 15.
- the tube fixing bracket 15a is provided integrally with the reinforcing plate 15, the function of reinforcing the air vent tube 10 and the function of fixing the air vent tube 10 are achieved while reducing the number of parts.
- the air vent structure assembling method is an assembling method for fixing the air vent tube 10 to the transmission case 2 via the plate adapter 9 for the air vent structure of the embodiment.
- the air vent structure for extracting air bubbles contained in the transmission hydraulic fluid ATF, which is the target of the air vent structure assembly method, during the pump operation is the air vent hole 8 communicating with the discharge port 48, the plate adapter 9, and the air vent tube 10. And having. And it is the structure which has arrange
- the method for assembling the air vent structure in the embodiment includes assembling the air vent structure in one control valve assembly assembling process in the assembly line of the automatic transmission unit.
- the control valve assembly assembling step includes a case fixing procedure for the plate adapter 9 (FIG. 11), a control valve assembly assembling procedure (FIG. 12), and a connection fixing procedure for the air vent tube 10 (FIG. 13).
- FIG. 11 As shown in FIG. 11, before the control valve assembly assembling procedure (FIG. 12), the plate adapter 9 is fixed in the case of the air vent hole 8 communicating with the discharge port 48 in the transmission case 2 as shown in FIG. It is a procedure to attach to the position. That is, before the control valve unit 5 and the strainer 6 are fixed to the transmission case 2, the plate adapter 9 is attached to the transmission case 2 by the bolts 21 and 22 in the state where there is no factor that hinders the fixing operation. Fix it.
- the plate adapter 9 is preliminarily formed with a tube insertion hole 91 that has been subjected to a sealing surface processing with the air vent tube 10.
- the control valve assembly assembling procedure is a procedure for assembling the control valve unit 5 to the transmission case 2 together with the strainer 6 as shown in FIG. That is, in the control valve assembly assembling procedure, control valve assemblies 5 and 6 in which the strainer 6 is bolted to the control valve unit 5 in advance are prepared. Then, the control valve assemblies 5 and 6 are arranged at the fixed position of the transmission case 2, and the bolt tightening operation for the plurality of bolt holes at the outer peripheral position of the control valve unit 5 is performed. At this time, bolt tightening is not performed for one bolt hole opened in the control valve unit 5. In this manner, before the air vent tube 10 is connected and fixed, and only the plate adapter 9 is fixed to the transmission case 2, the control valve assemblies 5 and 6 are a plurality of parts excluding one bolt. Secure with the bolts.
- connection fixing procedure of the air vent tube is a procedure for completing the attachment of the air vent tube 10 at the same time as completing the assembly process of the control valve assembly.
- the procedure for fixing the air vent tube 10 includes a procedure for attaching the air vent tube to the plate adapter 9 and a procedure for fixing the air vent tube to the transmission case 2.
- the O-ring 14d is attached in advance to the connector 14 at the end of the air vent tube 10 on the adapter side. Then, when attaching the air vent tube 10 to the plate adapter 9, the connector 14 of the air vent tube 10 to which the O-ring 14 d is attached is inserted into the tube insertion hole 91 of the plate adapter 9.
- the air vent tube 10 is provided with a tube fixing bracket 15a having a bolt hole 15b. Then, when the air vent tube 10 attached to the plate adapter 9 is fixed, it is fixed to the transmission case 2 together with the control valve unit 5 by the fastening bolt 16 at the position of the bolt hole 15b. The control valve assembly assembling process is completed at the same time as the tightening and fixing by the co-tightening bolt 16 is completed.
- the plate adapter 9 is shifted before the control valve assemblies 5 and 6 are assembled. Attach to machine case 2. After the control valve assemblies 5 and 6 are assembled, the air vent tube 10 is assembled to the plate adapter 9 while being within the range of the control valve assembly assembling step.
- the assembly of the air vent structure is incorporated as a part of the assembly process of one control valve assembly in the assembly line of the automatic transmission unit.
- the plate adapter 9 and the air vent tube 10 are assembled without adding a new process other than the control valve assembly assembling process.
- the above (a) can be dealt with by attaching the air vent tube 10 to the plate adapter 9 after assembling the control valve assemblies 5 and 6 and within the range of the control valve assembly assembling process. Will do. Therefore, it is not necessary to add a process of assembling the air vent tube 10 as a separate process of the control valve assembly assembling process, and assemblability is improved.
- the above (b) can be dealt with by adding a plate adapter 9 between the transmission case 2 and the air vent tube 10. Therefore, by processing the inner surface of the tube insertion hole not to the transmission case 2 but to the inner surface processing of the tube insertion hole 91 of the plate adapter 9, the transmission case 2 can be processed easily.
- the air vent tube 10 when the air vent tube 10 is fixed, it is fixed to the transmission case 2 together with the control valve unit 5 by the joint bolt 16 at the position of the bolt hole 15b. That is, by using the co-tightening bolt 16, the fixing of the air bleeding tube 10 to the transmission case 2 is completed simultaneously with the completion of the assembly process of the control valve assembly. Therefore, when the air vent tube 10 is assembled in the control valve assembly assembling step, the number of work steps can be reduced and the working time can be shortened.
- Transmission hydraulic oil ATF which is driven by a travel drive source and is stored in the oil pan 7, is sucked from the suction port 47 via the strainer 6, and the pressurized transmission hydraulic oil ATF is discharged via the discharge port 48.
- an oil pump 4 for supplying to the control valve unit 5
- an oil pump for an automatic transmission having an air vent passage with one end communicating with the discharge port 48 and the other end opening toward the oil pan 7.
- the opening end of the air vent passage is disposed at a position where the transmission hydraulic oil ATF is in oil even when parking on the slope road. For this reason, at the time of parking on the slope road, it is possible to prevent the transmission hydraulic oil ATF from being removed from the oil pump 4 even if the road slope angle becomes large.
- the opening end 8a of the air vent hole 8 is a corner of the pump side space PS that is out of the central region where the strainer 6 and the control valve unit 5 are arranged in the hydraulic oil filling region to the oil pan 7 in plan view.
- the air vent tube 10 is connected to the air vent hole 8 and extends in the vehicle downward direction.
- the air vent tube 10 is bent from the first tube portion 11 and extends in the direction perpendicular to the pump axis through the pump side space PS.
- a second tube portion 12, and a third tube portion 13 that is bent from the second tube portion 12 and extends along the bottom surface of the oil pan 7 in the pump axial direction and has a termination surface as a tube opening end 10 a.
- the shape of the air vent tube 10 can be extended to the lower position of the strainer while making the shape of the air vent tube 10 simple, and the tube opening end 10a is in the oil of the transmission hydraulic oil ATF. Can be arranged.
- the first tube portion 11 is provided with the connector 14 having the flange portion 14b whose outer diameter is larger than that of the tube insertion hole 91. For this reason, in addition to the effect of (4), the insertion of the air vent tube 10 can be prevented by providing the connector 14 with the flange 14b.
- a reinforcing plate 15 is provided along the air vent tube 10
- a tube fixing bracket 15 a for fixing the air vent tube 10 is provided integrally with the reinforcing plate 15.
- Transmission hydraulic oil ATF which is driven by a travel drive source and is stored in the oil pan 7, is sucked from the suction port 47 via the strainer 6, and the pressurized transmission hydraulic oil ATF is discharged via the discharge port 48.
- an oil pump 4 for supplying to the control valve unit 5
- an air vent hole 8 communicating with the discharge port 48 and a plate attached to a case member (transmission case 2) in which the air vent hole 8 is formed.
- An automatic transmission oil having an adapter 9 and an air vent tube 10 connected to the plate adapter 9, and arranging the tube opening end 10 a of the air vent tube 10 in the oil of the transmission hydraulic oil ATF at the lower position of the strainer.
- the air vent tube 10 is assembled to the plate adapter 9 during the control valve assembly assembly process. For this reason, when fixing the air vent tube 10 to the case member (transmission case 2) via the plate adapter 9, the ease of assembling the air vent tube 10 is improved while ensuring the ease of processing of the transmission case 2. Can do.
- the plate adapter 9 is previously formed with a tube insertion hole 91 having a sealing surface processed with the air vent tube 10, and a seal ring (O-ring 14 d) is attached in advance to the adapter side end of the air vent tube 10. To do.
- the adapter side end of the air vent tube 10 fitted with a seal ring (O-ring 14 d) is inserted into the tube insertion hole 91 of the plate adapter 9. For this reason, in addition to the effect of (7), when attaching the air vent tube 10 to the plate adapter 9, the air vent tube 10 can be attached quickly and easily.
- the air vent tube 10 is provided with a tube fixing bracket 15a having a bolt hole 15b, When the air vent tube 10 is fixed, it is fixed to the transmission case 2 together with the control valve unit 5 by the co-tightening bolt 16 at the position of the bolt hole 15b. For this reason, in addition to the effect of (7) or (8), when assembling the air vent tube 10 in the control valve assembly assembling step, it is possible to reduce the work man-hours and shorten the working time.
- the plate adapter 9 for inserting and connecting the air vent tube 10 is fixed to the transmission case 2 in which the air vent hole 8 is formed while maintaining a sealed state with the tube insertion hole 91.
- the air vent structure may be an example in which the air vent tube is directly inserted and connected to the transmission case in which the air vent hole is formed without using the plate adapter.
- the air vent tube 10 includes the first tube portion 11, the second tube portion 12, and the third tube portion 13 is shown.
- the air vent tube may be an example in which a bent shape other than the embodiment is set corresponding to the position of the air vent hole and the position of the tube opening end, or the position and shape of the control valve assembly.
- the connector 14 having the flange portion 14b is provided on the first tube portion 11, and the reinforcing plate 15 is provided along the tube shape.
- the air vent tube may be an example in which a connector or a reinforcing plate is not provided, or may be an example in which the shape of the connector or the reinforcing plate is different from that in the embodiment.
- the air vent tube 10 is inserted into the plate adapter 9 and the air vent tube 10 is fixed to the transmission case 2 at the same time as the assembly of the control valve assemblies 5 and 6 is completed. It was.
- the air vent tube may be fixed to the transmission case after the control valve assembly is assembled and before or after the assembly of the control valve assembly is completed. In short, any method may be used as long as the air vent tube is assembled to the plate adapter after the control valve assembly is assembled and within the range of the control valve assembly assembling step.
- the air vent structure and the air vent structure assembly method of the oil pump for an automatic transmission according to the present invention is applied to a pickup truck equipped with a diesel engine and a vertical automatic transmission (7-speed forward) is shown.
- the air vent structure and the air vent structure assembly method of the oil pump for an automatic transmission according to the present invention can be applied to a gasoline engine car, a hybrid car, and the like in addition to a diesel engine car.
- the automatic transmission can also be applied to a horizontal stepped transmission or a continuously variable transmission in addition to a vertical stepped transmission.
- any vehicle equipped with an oil pump for an automatic transmission driven by a travel drive source can be applied.
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Abstract
Description
変速機作動油に含まれる空気泡をポンプ作動中に抜く空気抜き構造として、一端が吐出ポートに連通し、他端がオイルパンに向かって開口する空気抜き通路を有する。
この自動変速機用オイルポンプの空気抜き構造において、空気抜き通路の開口端を、勾配路駐車時においても変速機作動油の油中となる位置に配置する。
この結果、勾配路駐車時、路面勾配角度が大きくてもオイルポンプ内の変速機作動油の抜けを防止することができる。
実施例における自動変速機用オイルポンプの空気抜き構造及び空気抜き構造組み付け方法は、ディーゼルエンジン及び縦置き自動変速機(前進7速段)を搭載したピックアップトラックに適用したものである。以下、実施例における自動変速機用オイルポンプの空気抜き構造の構成を、「全体構成」、「空気抜き構造の詳細構成」に分けて説明する。
図1は実施例のオイルポンプの空気抜き構造が適用された自動変速機を示す縦断側面図であり、図2は自動変速機を示す一部破断正面図である。以下、図1及び図2に基づき、全体構成を説明する。
図3は実施例のオイルポンプの空気抜き構造が適用された自動変速機においてオイルパン7を外した状態を示す底面図、図4はオイルパン7を外した状態を示す要部斜視図、図5はプレートアダプター9に対する空気抜きチューブ10の接続構造を示す拡大断面図である。以下、図1~図5に基づき、空気抜き構造の詳細構成を説明する。
ここで、チョーク孔81とは、オリフィス孔のように断面積が小さく、オリフィス孔と比較して孔長を長くしていて、例えば、ポンプハウジング43とポンプカバー44の合わせ面に溝を設けることで形成される。つまり、ポンプ作動中、オイルポンプ4の吐出ポート48からは、加圧した変速機作動油ATFが吐出通路49を介してコントロールバルブユニット5に供給される。このとき、コントロールバルブユニット5への加圧した変速機作動油ATFの供給を確保しつつ、変速機作動油ATFに含まれる空気泡を抜くため、吐出ポート48から分岐した位置にチョーク孔81を設けている。
また、空気抜き孔8の開口端8aは、図3に示すように、平面視によるオイルパン7への方形状作動油充填領域のうち、ストレーナ6及びコントロールバルブユニット5が配置される中央部領域から車両前方側に外れたポンプ側スペースPSの隅部位置に配置される。
実施例における作用を、「勾配路駐車時の油中解放作用」、「空気抜き構造の他の特徴作用」、「空気抜き構造組み付け方法」、「空気抜き構造組み付け方法の他の特徴作用」に分けて説明する。
例えば、自動変速機用オイルポンプの空気抜き構造が、一端が吐出ポートに連通する空気抜き孔のみにより構成され、空気抜き孔の開口端が、変速機ケース内に解放されているとする。
この場合、エンジンを停止すると、空気抜き孔からオイルポンプの油路内に空気が入る。そして、時間の経過と共にオイルポンプ内の変速機作動油が抜け、オイルポンプのポンプロータの油膜が切れる。エンジン停止から長時間を経過した後、エンジンを始動すると、オイルポンプが駆動されるが、切れていたポンプロータの油膜が徐々に形成されてオイルポンプの油路内に入っている空気を排出し終えるまでに時間を要する。よって、エンジンを始動しても、ポンプ駆動開始からポンプ油路内の空気を排出し終えるまでの間、オイルポンプからは所望の変速機作動油が吐出されない。したがって、エンジン始動後に発進を意図して発進セレクト操作を行っても、発進要素が油圧締結されていない間は、エンジン駆動力による発進ができない。特に、ディーゼルエンジンの場合は、ガソリンエンジンに比べて回転数が低く、エンジン始動によりオイルポンプが駆動されてから、オイルポンプの油路内に入っている空気を排出し終えるまでに長い待ち時間を要する。
登坂路駐車時では、図8に示すように、車両の駐車可能性がある世界中の登坂勾配路の最大値に相当する登坂勾配角度θ1の登坂勾配路のときに登坂路油面Eになり、空気抜きチューブ10のチューブ開口端10aが変速機作動油ATFの油中に配置された状態が維持される。
右勾配路駐車時では、図9に示すように、右勾配角度θ2=80%の右勾配路のときに右勾配路油面Fになり、空気抜きチューブ10のチューブ開口端10aが変速機作動油ATFの油中に配置された状態が維持される。
左勾配路駐車時では、図10に示すように、左勾配角度θ3=80%の左勾配路のときに左勾配油面Gになり、空気抜きチューブ10のチューブ開口端10aが変速機作動油ATFの油中に配置された状態が維持される。
実施例では、空気抜き孔8が形成された変速機ケース2に、チューブ挿入穴91とのシール状態を保ちながら空気抜きチューブ10を挿入接続するプレートアダプター9を固定する構成とした。
例えば、チューブ挿入穴の内面加工を、変速機ケース2に対する加工にすると、ケース加工設備に、チューブ挿入穴の内面加工を施すツールを追加する必要がある。そして、ツール替えができるタクトの余裕が無いと、変速機ケース2に対する加工中にツール替えという作業が発生してしまう。
これに対し、別部品として、プレートアダプター9を追加すると、変速機ケース2に対する加工では無く、プレートアダプター9のチューブ挿入穴91の内面加工に委ねることができ、変速機ケース2の加工が容易になる。
即ち、プレートアダプター9に空気抜きチューブ10を取り付ける際、Oリング14dを装着した空気抜きチューブ10のアダプター側端部を、プレートアダプター9のチューブ挿入穴91に差し込むことで行われる。このとき、コネクタ14に鍔部14bが無いとシール機能が損なわれる位置まで空気抜きチューブ10を過挿入してしまうおそれがある。これに対し、コネクタ14に鍔部14bを有することで、空気抜きチューブ10の過挿入が防止される。
例えば、空気抜きチューブ10の補強機能を達成するプレート部品と空気抜きチューブ10の固定機能を達成するブラケット部品とを、それぞれ設けると、少なくとも2部品が必要となってしまう。
これに対し、補強プレート15と一体にチューブ固定用ブラケット15aを設けるため、部品点数を削減しながら、空気抜きチューブ10の補強機能と、空気抜きチューブ10の固定機能が達成される。
まず、空気抜き構造組み付け方法とは、実施例の空気抜き構造を対象とし、空気抜きチューブ10を、プレートアダプター9を介して変速機ケース2に固定する際の組み付け方法をいう。
ここで、空気抜き構造組み付け方法の対象となる変速機作動油ATFに含まれる空気泡をポンプ作動中に抜く空気抜き構造は、吐出ポート48に連通する空気抜き孔8と、プレートアダプター9と、空気抜きチューブ10と、を有する。そして、空気抜きチューブ10のチューブ開口端10aを、ストレーナ下部位置の変速機作動油ATFの油中に配置した構造である。
プレートアダプター9のケース固定手順は、コントロールバルブアッセンブリ組み付け手順(図12)の前に、図11に示すように、プレートアダプター9を変速機ケース2のうち、吐出ポート48に連通する空気抜き孔8の位置に取り付ける手順である。
つまり、コントロールバルブユニット5及びストレーナ6が変速機ケース2に固定される前であって、固定作業を阻害する要因が全く無い状態において、プレートアダプター9を変速機ケース2に対しボルト21,22により固定する。なお、プレートアダプター9には、空気抜きチューブ10とのシール面加工を施したチューブ挿入穴91が予め形成してある。
コントロールバルブアッセンブリ組み付け手順は、図12に示すように、コントロールバルブユニット5をストレーナ6と共に変速機ケース2に組み付ける手順であるが、組み付け完了の直前状態までとする手順である。
つまり、コントロールバルブアッセンブリ組み付け手順では、予めコントロールバルブユニット5に対してストレーナ6をボルト固定したコントロールバルブアッセンブリ5,6を用意する。そして、コントロールバルブアッセンブリ5,6を変速機ケース2の固定位置に配置し、コントロールバルブユニット5の外周位置の複数のボルト穴に対するボルト締め付け作業を行う。このとき、コントロールバルブユニット5に開口されている1つのボルト穴に対しては、ボルト締め付けを行わない。このように、空気抜きチューブ10が接続固定される前であって、プレートアダプター9のみが変速機ケース2に固定されている状態において、コントロールバルブアッセンブリ5,6を、1本のボルトを除いた複数のボルトにより固定する。
空気抜きチューブの接続固定手順は、図13に示すように、コントロールバルブアッセンブリ組み付け工程を完了させるのと同時に、空気抜きチューブ10の取り付けを完了させる手順である。この空気抜きチューブ10の接続固定手順は、プレートアダプター9への空気抜きチューブ取り付け手順と、変速機ケース2への空気抜きチューブ固定手順と、を有する。
空気抜きチューブを変速機ケースに固定する際、その組み付け方法としては、
(a) コントロールバルブアッセンブリ組み付け工程が完了した後、空気抜きチューブを組み付ける工程を追加する。
(b) プレートアダプターを用いることなく、コントロールバルブアッセンブリ組み付けと同時に、空気抜きチューブの組み付けを完了する。
等が考えられる。
実施例では、プレートアダプター9に空気抜きチューブ10を取り付ける際、Oリング14dを装着した空気抜きチューブ10のアダプター側端部を、プレートアダプター9のチューブ挿入穴91に差し込むことで行う方法とした。
即ち、プレートアダプター9に空気抜きチューブ10を取り付ける際、時間がかかるボルト締め作業等を要することなく、空気抜きチューブ10のアダプター側端部を、プレートアダプター9のチューブ挿入穴91に差し込む作業を行うだけで良い。
従って、プレートアダプター9に空気抜きチューブ10を取り付ける際、素早く、かつ、容易に空気抜きチューブ10が取り付けられる。
即ち、共締めボルト16を用いることで、コントロールバルブアッセンブリ組み付け工程の完了と同時に、空気抜きチューブ10の変速機ケース2への固定を完了することになる。
従って、コントロールバルブアッセンブリ組み付け工程において空気抜きチューブ10を組み付ける際、作業工数の低減が図られると共に、作業時間の短縮化が図られる。
実施例の自動変速機用オイルポンプの空気抜き構造及び空気抜き構造組み付け方法にあっては、下記に列挙する効果が得られる。
変速機作動油ATFに含まれる空気泡をポンプ作動中に抜く空気抜き構造として、一端が吐出ポート48に連通し、他端がオイルパン7に向かって開口する空気抜き通路を有する自動変速機用オイルポンプの空気抜き構造において、
空気抜き通路の開口端を、勾配路駐車時においても変速機作動油ATFの油中となる位置に配置する。
このため、勾配路駐車時、路面勾配角度が大きくなってもオイルポンプ4内の変速機作動油ATFの抜けを防止することができる。
空気抜き孔8の開口端8aに、空気抜き孔8と連通する空気抜き通路がチューブ内面により形成される空気抜きチューブ10を接続し、
空気抜きチューブ10を、空気抜き孔8との接続位置から、ストレーナ6とオイルパン7に挟まれたストレーナ下部隙間領域Aまで延設し、空気抜きチューブ10のチューブ開口端10aを、ストレーナ下部位置にて変速機作動油ATFの油中に配置する。
このため、(1)の効果に加え、曲げ対応により取り回し自由度が高い空気抜きチューブ10を用いて、変速機作動油ATFのストレーナ下部位置にチューブ開口端10aを配置することができる。
このため、(2)の効果に加え、シール状態を保ちながら空気抜きチューブ10を挿入接続する際、追加部品であるプレートアダプター9のチューブ挿入穴91を内面加工することで、ケース部材(変速機ケース2)の加工を容易にすることができる。
空気抜きチューブ10は、空気抜き孔8と接続すると共に車両下方向に延設する第1チューブ部11と、第1チューブ部11から曲げてポンプ側スペースPSを通ってポンプ軸直交方向に延設する第2チューブ部12と、第2チューブ部12から曲げてオイルパン7の底面に沿ってポンプ軸方向に延設すると共に終端面をチューブ開口端10aとする第3チューブ部13と、を有する。
このため、(2)又は(3)の効果に加え、空気抜きチューブ10の形状を、単純な曲げ形状としながらもストレーナ下部位置まで延設でき、チューブ開口端10aを変速機作動油ATFの油中に配置することができる。
このため、(4)の効果に加え、コネクタ14に鍔部14bを有することで、空気抜きチューブ10の過挿入を防止することができる。
空気抜きチューブ10を固定するチューブ固定用ブラケット15aを、補強プレート15と一体に設ける。
このため、(4)又は(5)の効果に加え、部品点数を削減しながら、空気抜きチューブ10の補強機能と、空気抜きチューブ10の固定機能とを達成することができる。
変速機作動油ATFに含まれる空気泡をポンプ作動中に抜く空気抜き構造として、吐出ポート48に連通する空気抜き孔8と、空気抜き孔8が形成されたケース部材(変速機ケース2)に取り付けられるプレートアダプター9と、プレートアダプター9に連結される空気抜きチューブ10と、を有し、空気抜きチューブ10のチューブ開口端10aを、ストレーナ下部位置の変速機作動油ATFの油中に配置する自動変速機用オイルポンプの空気抜き構造を組み立てる組立方法において、
コントロールバルブユニット5にストレーナ6を固定したコントロールバルブアッセンブリ5,6を、変速機ケース2に組み付けるコントロールバルブアッセンブリ組み付け工程と、
空気抜きチューブ10を、プレートアダプター9を介してケース部材(変速機ケース2)に固定する際に、コントロールバルブアッセンブリ組み付け工程の前に、プレートアダプター9をケース部材(変速機ケース2)に取り付けるプレートアダプター取り付け工程と、を含み、コントロールバルブアッセンブリ組み付け工程の間に、プレートアダプター9に空気抜きチューブ10を組み付ける。
このため、空気抜きチューブ10を、プレートアダプター9を介してケース部材(変速機ケース2)に固定する際、変速機ケース2の加工容易性を確保しながら、空気抜きチューブ10の組み立て性を向上させることができる。
プレートアダプター9に空気抜きチューブ10を取り付ける際、シールリング(Oリング14d)を装着した空気抜きチューブ10のアダプター側端部を、プレートアダプター9のチューブ挿入穴91に差し込むことで行う。
このため、(7)の効果に加え、プレートアダプター9に空気抜きチューブ10を取り付ける際、素早く、かつ、容易に空気抜きチューブ10を取り付けることができる。
空気抜きチューブ10を固定する際、変速機ケース2に対してコントロールバルブユニット5と共にボルト穴15bの位置にて共締めボルト16により固定する。
このため、(7)又は(8)の効果に加え、コントロールバルブアッセンブリ組み付け工程において空気抜きチューブ10を組み付ける際、作業工数の低減を図ることができると共に、作業時間の短縮化を図ることができる。
また、プレートアダプター9の変速機ケース2側の面だけに変速機ケース2とのシール性を確保するための加工をすることが考えらえるが、その場合、プレートアダプター9を表裏逆に取り付けられるのを防止するため、変速機ケース2にプレートアダプター9側に突出する凸部を形成し、表裏逆に取り付けようとした場合にこの凸部とプレートアダプター9が干渉してボルト固定できない構造とすることもできる。
Claims (9)
- 走行駆動源により駆動され、オイルパンに溜められた変速機作動油を、ストレーナを介して吸入ポートから吸入し、加圧した前記変速機作動油を吐出ポートを介してコントロールバルブユニットに供給するオイルポンプを備え、
前記変速機作動油に含まれる空気泡をポンプ作動中に抜く空気抜き構造として、一端が前記吐出ポートに連通し、他端が前記オイルパンに向かって開口する空気抜き通路を有する自動変速機用オイルポンプの空気抜き構造において、
前記空気抜き通路の開口端を、勾配路駐車時においても前記変速機作動油の油中となる位置に配置した、
自動変速機用オイルポンプの空気抜き構造。 - 請求項1に記載された自動変速機用オイルポンプの空気抜き構造において、
前記オイルパンに向かって開口する空気抜き孔を設け、
前記空気抜き孔の開口端に、前記空気抜き孔と連通する空気抜き通路がチューブ内面により形成される空気抜きチューブを接続し、
前記空気抜きチューブを、前記空気抜き孔との接続位置から、前記ストレーナと前記オイルパンに挟まれたストレーナ下部隙間領域まで延設し、前記空気抜きチューブのチューブ開口端を、ストレーナ下部位置にて前記変速機作動油の油中に配置した、
自動変速機用オイルポンプの空気抜き構造。 - 請求項2に記載された自動変速機用オイルポンプの空気抜き構造において、
前記空気抜き孔が形成されたケース部材に、チューブ挿入穴とのシール状態を保ちながら前記空気抜きチューブを挿入接続するプレートアダプターを固定した、
自動変速機用オイルポンプの空気抜き構造。 - 請求項2又は3に記載された自動変速機用オイルポンプの空気抜き構造において、
前記空気抜き孔の開口端は、平面視による前記オイルパンへの作動油充填領域のうち、前記ストレーナ及び前記コントロールバルブユニットが配置される中央部領域から外れたポンプ側スペースの隅部位置に配置され、
前記空気抜きチューブは、前記空気抜き孔と接続すると共に車両下方向に延設する第1チューブ部と、前記第1チューブ部から曲げて前記ポンプ側スペースを通ってポンプ軸直交方向に延設する第2チューブ部と、前記第2チューブ部から曲げて前記オイルパンの底面に沿ってポンプ軸方向に延設すると共に終端面を前記チューブ開口端とする第3チューブ部と、を有する、
自動変速機用オイルポンプの空気抜き構造。 - 請求項4に記載された自動変速機用オイルポンプの空気抜き構造において、
前記第1チューブ部に、前記チューブ挿入穴よりも外径を大きくした鍔部を有するコネクタを設けた、
自動変速機用オイルポンプの空気抜き構造。 - 請求項4又は5に記載された自動変速機用オイルポンプの空気抜き構造において、
前記空気抜きチューブに沿って補強プレートを設け、
前記空気抜きチューブを固定するチューブ固定用ブラケットを、前記補強プレートと一体に設けた、
自動変速機用オイルポンプの空気抜き構造。 - 走行駆動源により駆動され、オイルパンに溜められた変速機作動油を、ストレーナを介して吸入ポートから吸入し、加圧した前記変速機作動油を吐出ポートを介してコントロールバルブユニットに供給するオイルポンプを備え、
前記変速機作動油に含まれる空気泡をポンプ作動中に抜く空気抜き構造として、前記吐出ポートに連通する空気抜き孔と、前記空気抜き孔が形成されたケース部材に取り付けられるプレートアダプターと、前記プレートアダプターに連結される空気抜きチューブと、を有し、前記空気抜きチューブのチューブ開口端を、ストレーナ下部位置の前記変速機作動油の油中に配置する自動変速機用オイルポンプの空気抜き構造を組み立てる組立方法において、
前記コントロールバルブユニットに前記ストレーナを固定したコントロールバルブアッセンブリを、前記変速機ケースに組み付けるコントロールバルブアッセンブリ組み付け工程と、
前記空気抜きチューブを、前記プレートアダプターを介して前記ケース部材に固定する際に、前記コントロールバルブアッセンブリ組み付け工程の前に、前記プレートアダプターを前記ケース部材に取り付けるプレートアダプター取り付け工程と、
を含み、
前記コントロールバルブアッセンブリ組み付け工程の間に、前記プレートアダプターに前記空気抜きチューブを組み付ける、
自動変速機用オイルポンプの空気抜き構造組み付け方法。 - 請求項7に記載された自動変速機用オイルポンプの空気抜き構造組み付け方法において、
前記プレートアダプターに、予め前記空気抜きチューブとのシール面加工を施したチューブ挿入穴を形成しておくとともに、前記空気抜きチューブのアダプター側端部に予めシールリングを装着し、
前記プレートアダプターに前記空気抜きチューブを取り付ける際、シールリングを装着した前記空気抜きチューブのアダプター側端部を、前記プレートアダプターの前記チューブ挿入穴に差し込むことで行う、
自動変速機用オイルポンプの空気抜き構造組み付け方法。 - 請求項7又は8に記載された自動変速機用オイルポンプの空気抜き構造組み付け方法において、
前記空気抜きチューブに、ボルト穴を有するチューブ固定用ブラケットを設け、
前記空気抜きチューブを固定する際、変速機ケースに対して前記コントロールバルブユニットと共に前記ボルト穴の位置にて共締めボルトにより固定する、
自動変速機用オイルポンプの空気抜き構造組み付け方法。
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US16/087,022 US11226032B2 (en) | 2016-03-22 | 2017-02-10 | Air vent structure of oil pump for automatic transmission, and method for assembling air vent structure |
KR1020187027296A KR20180112865A (ko) | 2016-03-22 | 2017-02-10 | 자동 변속기용 오일 펌프의 공기 빼기 구조 및 공기 빼기 구조 조립 방법 |
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JP2001082275A (ja) * | 1999-09-10 | 2001-03-27 | Mitsubishi Motors Corp | 燃料ポンプの吸入装置 |
JP2003239869A (ja) * | 2002-02-20 | 2003-08-27 | Hitachi Unisia Automotive Ltd | オイルポンプ |
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