JPH10184859A - Automatic transmission lubrication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent suction of air from an in-flow port. SOLUTION: This automatic transmission lubrication device is provided with an oil pan 11 which is installed in the bottom part of an automatic transmission case so as to store oil, a valve body 12 arranged in the automatic transmission case, a strainer 13 which is arranged inside the oil pan 11 and sucks the oil stored in the oil pan 11 from an inlet port 15 formed on the bottom face so as to feed it to the valve body 12 via an outlet port formed on the top face after filtration, and an oil guiding means guiding oil. In the oil guiding means, a position facing a drain hole in the valve body 12 is set as a starting point PS, while a position matching a part in which refluxed oil from the valve body 12 and the automatic transmission case is less is set as an end point PE.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an automatic transmission lubrication apparatus.

[0002]

2. Description of the Related Art Conventionally, in an automatic transmission, rotation generated by an engine is transmitted to a transmission via a torque converter, and the transmission performs a speed change and transmits the drive to driving wheels. . And, in the transmission, a gear unit composed of a plurality of gear elements is disposed, and a clutch, a friction engagement element such as a brake is disengaged,
By selectively outputting the rotation of each gear element, a plurality of shift speeds are achieved.

A valve body constituting a hydraulic circuit for disengaging the friction engagement element is provided, and oil discharged from a hydraulic pump is sent to each element such as a hydraulic servo and a valve in the valve body. Can be The oil discharged from the hydraulic pump is also sent to each member in the automatic transmission case for cooling or lubrication. However, frictions generated when operating each element in the valve body and cooling and lubricating each member in the automatic transmission case cause metal powder and dust (dust) to be mixed into oil due to friction generated. .

Therefore, an automatic transmission lubrication device is provided to remove metal powder, dust and the like in oil. That is, a strainer is provided in the oil pan, and oil returned to the oil pan from each element in the valve body and each member in the automatic transmission case is filtered by the strainer. To this end, an inflow port is formed downward at the bottom surface of the strainer, and the oil stored in the oil pan is sucked from the inflow port.

[0005] However, when the amount of oil recirculated from each element in the valve body and each member in the automatic transmission case is small, the oil level in the oil pan becomes low, and the oil level from the inflow port increases. At the same time, air may be sucked. Therefore, a rib is formed on the surface of the upper case of the strainer, and an oil flow path is formed by the rib. The oil is guided near the inflow port, thereby preventing air from being sucked from the inflow port. (See Japanese Utility Model Laid-Open No. 5-42813).

[0006]

However, in the above-mentioned conventional automatic transmission lubricating apparatus, there are portions where the amount of oil recirculated from each element in the valve body and each member in the automatic transmission case is large and small. There are portions, and accordingly, in the oil pan, a portion having a high oil level and a portion having a low oil level are formed due to the high viscosity of the oil.

Therefore, even if the recirculated oil is guided to the vicinity of the inflow port by the rib, if the oil supplied from the portion having a low oil level is sucked, the air is sucked together with the oil. In addition, air suction cannot be reliably prevented. Therefore, it is conceivable to increase the capacity of the oil pan to prevent the formation of a portion having a high oil level and a portion having a low oil level in the oil pan. The device becomes larger accordingly.

The present invention solves the problems of the conventional automatic transmission lubricating device, and can reliably prevent air from being sucked from the inflow port, and can reduce the size of the automatic transmission. It is an object to provide a lubrication device.

[0009]

For this purpose, in the automatic transmission lubricating apparatus according to the present invention, an oil pan attached to the bottom of the automatic transmission case for storing oil and disposed in the automatic transmission case. A valve body and oil disposed in the oil pan and stored in the oil pan are sucked from an inlet formed on the bottom surface, filtered, and then filtered from the outlet formed on the top surface. And oil guide means for guiding oil.

[0010] The oil guide means starts at a position facing the drain hole of the valve body and ends at a position corresponding to a portion of the valve body and the automatic transmission case where the amount of oil returned from the case is small. In another automatic transmission lubricating apparatus of the present invention, an oil pan attached to the bottom of the automatic transmission case for storing oil, a valve body disposed in the automatic transmission case, and an oil pan disposed in the oil pan. The oil stored in the oil pan is suctioned from an inlet formed on the bottom surface, filtered, and then supplied to the valve body from an outlet formed on the top surface, and the oil is guided. Oil guide means.

The oil guide means starts at a position facing the drain hole of the valve body and ends at a position corresponding to a low oil level portion in the oil pan. In still another automatic transmission lubrication device according to the present invention, the oil guide means is an oil guide groove formed on a top surface of the strainer.

In still another automatic transmission lubricating apparatus according to the present invention, the drain hole is a drain hole of a relief valve. In still another automatic transmission lubricating apparatus according to the present invention, an end point of the oil guide groove is set corresponding to a region where the accumulator is provided in the valve body.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a bottom view of an automatic transmission lubrication apparatus according to an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view showing an arrangement of the automatic transmission lubrication apparatus according to the embodiment of the present invention, and FIG. 3 is a perspective view showing a relationship between the automatic transmission lubrication apparatus and the valve body according to the embodiment of the present invention.
1 is a plan view of a strainer according to an embodiment of the present invention.

In FIG. 1, reference numeral 11 denotes an oil pan, which is attached to the bottom of an automatic transmission case (not shown). Reference numeral 12 denotes a valve body that is disposed in the automatic transmission case so as to substantially cover the opening at the upper end of the oil pan 11 and that constitutes a hydraulic circuit.
Each hydraulic servo for engaging and disengaging the friction engagement element of the transmission arranged in the automatic transmission case, each shift valve for selectively supplying hydraulic pressure to each hydraulic servo, and various hydraulic pressures. Each element such as a valve for adjustment and a solenoid valve for switching each valve is provided.
In addition, each member which comprises the said transmission is arrange | positioned in the said automatic transmission case.

By the way, oil is supplied to each element in the valve body 12 for operation and to each member in the automatic transmission case for cooling or lubrication. Metal powder, dust, and the like are mixed in oil due to friction generated when each element is operated in the inside and when each member in the automatic transmission case is cooled and lubricated.

Therefore, an automatic transmission lubrication device is provided to remove metal powder, dust and the like in the oil. That is, the strainer 13 is disposed below the valve body 12 in the oil pan 11, and the oil returned to the oil pan 11 from each element in the valve body 12 and each member in the automatic transmission case is removed by the strainer 13. I try to filter. To this end, an inlet 15 is formed downward on the bottom surface of the strainer 13 and the oil pan 11
The oil stored inside is sucked through the inflow port 15.

The strainer 13 is formed by combining the upper case 16 and the lower case 17, and a filter material (not shown) formed of a wire mesh, non-woven fabric, or the like is provided in the strainer 13, The space in the strainer 13 is divided into two by the material. The upper case 16 has an outlet 21 for supplying the filtered oil to a pump (not shown).
Are formed, and an inlet 22 for oil returned from a primary regulator valve (not shown) and an inlet 23 for oil returned from a secondary regulator valve (not shown) are formed.

The outlet 21 is connected to the valve body 12, and the valve body 12 is further connected to the automatic transmission case.
The inside is communicated with the inside of the automatic transmission case via a flow path (not shown) formed in the valve body 12. Therefore, when the automatic transmission is operated to drive the pump to generate a negative pressure on the suction side of the pump, the negative pressure is sent into the strainer 13 through the outlet 21. As a result, the oil in the oil pan 11 is sucked at the inflow port 15, and the oil is filtered out by the filter medium to remove metal powder, dust and the like in the oil, and then is discharged from the outflow port 21. , And is supplied to the pump through the flow path.

The oil discharged from the pump is supplied to each element in the valve body 12 and also to each member in the automatic transmission case, and then returned to the oil pan 11. It has become. By the way, the oil supplied to each element in the valve body 12 is:
The fall from the drain hole (not shown) formed on the bottom surface S _A of the valve body 12 in the oil pan 11, the oil after being supplied to the respective members in the automatic transmission case, the upper surface of the valve body 12 After dropping, the oil pan 1
A gap formed between the valve body 1 and the valve body 12
It falls into the oil pan 11 through CL.

However, the region A of the valve body 12
An accumulator (not shown) is provided above R1, and linear solenoid valves SLU and SLT are provided in an area AR2 of the valve body 12, respectively, and the gap CL is covered by the accumulator and the linear solenoid valves SLU and SLT. . Therefore, in the areas AR1 and AR2, the flow of oil after being supplied to each member in the automatic transmission case is shut off, and the oil dropped on the upper surface of the valve body 12 causes the gap CL in other areas to pass through. As a result, it falls into the oil pan 11. Thus, the regions AR1, AR2 in the oil pan 11 are
Is not refluxed in a sufficient amount.

The region AR3 of the valve body 12
Is formed with an oil hole 35 for dropping oil returned from an oil cooler (not shown) into the oil pan 11, so that a sufficient amount of oil is provided in a portion of the oil pan 11 corresponding to the area AR3. Oil is refluxed. As a result, in the oil pan 11, the portion P where the oil level S is high is set.
1 and a lower portion P2 are formed, and
When the oil in the portion P2 where the oil level S is low is sucked,
Air is sucked in with oil.

In particular, when the oil temperature decreases and the volume of the oil decreases, and the fluidity of the oil deteriorates, the oil is supplied to each element in the valve body 12 or to each member in the automatic transmission case. The oil remains adhered to each element and each member and is not returned to the oil pan 11, so that the oil level S is reduced as a whole. In that case, the air is more easily sucked.

Therefore, an oil guide groove 38 is formed on the top surface of the strainer 13 as oil guide means.
The oil that has fallen on the top surface of No. 3 is guided by the oil guide groove 38 to the portion P2 where the oil level S is low, so that the oil level S is made uniform. An oil passage for supplying oil to the oil cooler is formed in the valve body 12, a relief valve (not shown) is provided on the oil passage, and a relatively large amount of oil is supplied from a drain hole 37 of the relief valve. Since a large amount of oil is returned to the oil pan 11, a portion facing the drain hole 37 is defined as a starting point PS of the oil guide groove 38, and a portion corresponding to the portion P2 where the oil level S is low. Is the end point PE of the oil guide groove 38.

Since the spools of the linear solenoid valves SLU and SLT are provided in an area AR2 of the valve body 12 facing the end point PE, the width of the oil guide groove 38 is widened and a spool relief is formed. Is done.
As described above, the oil dropped on the top surface of the strainer 13 is guided to the portion P2 where the oil level S is low without diffusing on the top surface of the strainer 13, and the oil level S is made uniform. At the same time, it is possible to reliably prevent air from being sucked from the inflow port 15.

Further, since the oil level S can be made uniform, it is not necessary to increase the capacity of the oil pan 11, and the automatic transmission lubrication device can be reduced in size accordingly. It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0026]

As described above in detail, according to the present invention, in the automatic transmission lubricating apparatus, an oil pan attached to the bottom of the automatic transmission case for storing oil and the oil pan for storing oil are provided. The disposed valve body and the oil disposed in the oil pan and stored in the oil pan are suctioned from an inlet formed on the bottom surface and filtered,
It has a strainer for supplying the valve body from an outlet formed on the top surface, and oil guide means for guiding oil.

[0027] The oil guide means starts at a position facing the drain hole of the valve body and ends at a position corresponding to a portion of the valve body and the automatic transmission case where a small amount of oil is returned. In this case, the oil is guided by the oil guide means to a portion where the oil is recirculated from the valve body and the automatic transmission case, and the oil level is made uniform, so that air is sucked from the inlet together with the oil. Can be reliably prevented.

Further, since the oil level can be made uniform, there is no need to increase the capacity of the oil pan, and the size of the automatic transmission lubrication device can be reduced accordingly. In another automatic transmission lubricating apparatus of the present invention, an oil pan attached to the bottom of the automatic transmission case for storing oil, a valve body disposed in the automatic transmission case, and an oil pan disposed in the oil pan. The oil stored in the oil pan is suctioned from an inlet formed on the bottom surface, filtered, and then supplied to the valve body through an outlet formed on the top surface, and the oil is guided. Oil guide means.

The oil guide means starts at a position facing the drain hole of the valve body and ends at a position corresponding to a low oil level portion in the oil pan. In this case, the oil is guided by the oil guide means to a portion having a low oil level in the oil pan, and the oil level is made uniform. Therefore, it is ensured that the air is sucked from the inflow port together with the oil. Can be prevented.

Further, since the oil level can be made uniform, there is no need to increase the capacity of the oil pan, and the size of the automatic transmission lubrication apparatus can be reduced accordingly. In still another automatic transmission lubrication device of the present invention,
Further, the oil guide means is an oil guide groove formed on the top surface of the strainer. In this case, the oil that has fallen on the top surface of the strainer is guided by the oil guide grooves without diffusing on the top surface of the strainer, and the oil level is made uniform. Can be reliably prevented.

In still another automatic transmission lubricating apparatus according to the present invention, the drain hole is a drain hole of a relief valve. In this case, a relatively large amount of oil is returned to the oil pan from the drain hole of the relief valve, so that sufficient oil can be guided. In still another automatic transmission lubricating apparatus according to the present invention, an end point of the oil guide groove is set corresponding to a region where the accumulator is provided in the valve body.

In this case, in the area where the accumulator is provided, the gap between the oil pan and the valve body is covered by the accumulator, and the flow of the recirculated oil is cut off. Since the oil level is set in accordance with the area, the oil level can be made uniform.

[Brief description of the drawings]

FIG. 1 is a bottom view of an automatic transmission lubrication apparatus according to an embodiment of the present invention.

FIG. 2 is an arrangement state diagram of the automatic transmission lubrication device according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a relationship between the automatic transmission lubrication device and the valve body according to the embodiment of the present invention.

FIG. 4 is a plan view of the strainer according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Oil pan 12 Valve body 13 Strainer 15 Inlet 21 Outlet 37 Drain hole 38 Oil guide groove AR1 area P2 Low part PS Starting point PE End point S Oil level

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Fukatsu 10th Takane, Fujiimachi, Anjo, Aichi Prefecture Inside Aisin AW Co., Ltd. (72) Makoto Hijikata 10th Takane, Fujiimachi, Anjo, Aichi Prefecture Aisin・ Within AW Co., Ltd. (72) Inventor Katsuyuki Asaoka 10th, Takane, Fujiimachi, Anjo-city, Aichi Prefecture Aisin Co., Ltd.・ Within AW Co., Ltd. (72) Inventor Akihito Hongoya 10th Takane, Fujiicho, Anjo, Aichi Prefecture Inside Aisin AW Co., Ltd. (72) Inventor Hideki Miyata 1st Toyota Town, Toyota City, Aichi Prefecture Toyota Auto (72) Inventor Keihan Fukumura 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Automobile Stock Association In-house (72) Inventor Yasunori Nakawaki 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Jun Tabata 1 Toyota Town Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Sayo Shoichi Shoichi 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Yasuo Hojo 1 Toyota Town, Toyota City, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (5)

[Claims] 1. An oil pan attached to a bottom of an automatic transmission case for storing oil, a valve body disposed in the automatic transmission case, a reservoir disposed in the oil pan, and stored in the oil pan. The obtained oil is suctioned from an inlet formed on the bottom surface, and after filtering, the strainer supplies the valve body from the outlet formed on the top surface to the valve body, and oil guide means for guiding the oil, The oil guide means starts at a position facing the drain hole of the valve body and ends at a position corresponding to a portion of the valve body and the portion of the oil that is recirculated from the automatic transmission case with a small amount of oil. Transmission lubrication device. 2. An oil pan attached to the bottom of the automatic transmission case for storing oil, a valve body disposed in the automatic transmission case, and disposed in the oil pan and stored in the oil pan. The obtained oil is suctioned from an inflow port formed on the bottom surface, and after filtration, a strainer that supplies the valve body from the outflow port formed on the top surface to the valve body, and oil guide means for guiding the oil, The automatic transmission lubricating device according to claim 1, wherein the oil guide means starts at a position facing the drain hole of the valve body and ends at a position corresponding to a low oil level portion in the oil pan. . 3. The automatic transmission lubrication device according to claim 1, wherein the oil guide means is an oil guide groove formed on a top surface of the strainer. 4. The automatic transmission lubricating apparatus according to claim 1, wherein the drain hole is a drain hole of a relief valve. 5. The automatic transmission lubrication device according to claim 1, wherein an end point of the oil guide groove is set in accordance with a region where the accumulator is provided in the valve body.