KR102113129B1 - Automatic transmission - Google Patents

Abstract

[Task] Suppress deterioration of sound performance.
[Solution Solution] The automatic transmission 1 has an oil cooler 20, an electric oil pump 21, and a variator 2. The variator 2 has a primary pulley 3, a secondary pulley 4, a primary pulley 3, and a power transmission member 5 wound around the secondary pulley 4. Viewed from the rotation axis X1 direction, the vertical line V1 passing through the rotation axis X1 which is the center of the axis of the primary pulley 3 is between the vertical line V2 passing through the rotation axis X2 which is the axis center of the secondary pulley 4, and the oil cooler 20. Located. The vertical line V1 passing through the rotational axis X1 of the primary pulley 3 is located between the vertical line V2 passing through the axis of rotation X2 of the secondary pulley 4 and the electric oil pump 21. The end 21a on the primary pulley 3 side of the electric oil pump 21 is located closer to the primary pulley 3 than the end 20a on the primary pulley 3 side of the oil cooler 20. Is placed in.

Description

Automatic transmission {AUTOMATIC TRANSMISSION}

The present invention relates to an automatic transmission.

Patent Document 1 discloses an automatic transmission in which an electric oil pump is placed on the outer periphery of a transmission case.

Japanese Patent Publication No. 2005-98338

In a belt-type continuously variable transmission (CVT) for a vehicle, resonance (power plant resonance) of a driving source and CVT is generated. The degree of resonance increases as the distance from the node of the power plant resonance increases. In CVT, the node of the power plant resonance is the primary pulley axis.

Therefore, in the CVT, the more arranged at a position spaced apart from the primary pulley shaft, the greater the vibration due to resonance, and the greater the degree of noise (acoustic power level) generated by the vibration.

As shown in FIG. 7, if the electric oil pump 21 attached to the transmission case 10 is disposed at a position spaced apart from the node of the power plant resonance (primary pulley shaft 31), the power plant resonance The amplitude of the vibrating electric oil pump 21 increases.

Then, the degree of noise (acoustic power level) generated by vibration of the electric oil pump 21 is larger than the oil cooler 20 disposed on the primary pulley shaft 31 side than the electric oil pump 21. It becomes.

That is, the electric oil pump 21 arranged at the position shown in FIG. 7 has a higher acoustic power level than the oil cooler 20.

The acoustic power level of the electric oil pump 21 is increased as the electric oil pump 21 is enlarged and the weight is increased.

Therefore, when an electric oil pump is attached to the outer periphery of a transmission case, the sound-insulating performance deteriorates depending on the distance from the node of the power plant resonance and the weight of the electric oil pump itself.

Therefore, it is desired to suppress deterioration in sound performance.

The present invention

Oil cooler,

Electric oil pump,

A primary pulley, a secondary pulley, and a variator having a power transmission member wound around the primary pulley and the secondary pulley,

The vertical line passing through the axial center of the primary pulley is located between the vertical line passing through the axial center of the secondary pulley and the oil cooler,

The vertical line passing through the axial center of the primary pulley is located between the vertical line passing through the axial center of the secondary pulley and the electric oil pump,

The end portion on the primary pulley side of the electric oil pump was an automatic transmission disposed closer to the primary pulley than the end portion on the primary pulley side of the oil cooler.

According to the present invention, it is possible to suppress deterioration in sound performance.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows typically the arrangement of each component of the continuously variable transmission which concerns on embodiment in a transmission case.
It is a figure explaining arrangement | positioning of the electric oil pump, transmission controller, and oil cooler in the continuously variable transmission which concerns on embodiment.
It is a figure explaining the modification example of arrangement | positioning in the transmission case of an electric oil pump and a transmission controller.
It is a figure explaining the modification example of arrangement | positioning in the transmission case of an electric oil pump and a transmission controller.
It is a figure explaining the modification example of arrangement | positioning in the transmission case of an electric oil pump and a transmission controller.
It is a figure explaining the modified example of arrangement | positioning in the transmission case of a transmission controller and an oil cooler.
It is a figure explaining arrangement | positioning of the electric oil pump and transmission controller in the continuously variable transmission which concerns on a prior art.

Hereinafter, the case where the embodiment of the present invention is applied to a belt-type continuously variable transmission (hereinafter referred to as an automatic transmission) will be described as an example.

1 is a view schematically showing the arrangement of each component of the automatic transmission 1 in the transmission case 10. In addition, in FIG. 1, the variator 2, the gear train 6, the final gear 7, and the differential device 8 disposed in the transmission case 10 are briefly illustrated by virtual lines. have.

2 is a view for explaining the arrangement of the electric oil pump 21 and the transmission controller 9 (ATCU) in the transmission case 10. FIG. 2A is an enlarged view around the electric oil pump 21 of the transmission case 10 of FIG. 1. FIG. 2B is a perspective view of the transmission case 10 viewed from the direction of the arrow A-A in FIG. 2A, and is an enlarged view of the periphery of the lid portion 126.

As shown in FIG. 1, the variator 2 of the vehicular belt type automatic transmission 1 (CVT) includes a primary pulley 3, a secondary pulley 4, and a power transmission member 5 (Belt).

The power transmission member 5 is a belt constructed by stacking plate-shaped elements having slits on both sides and arranging them in an annular shape, and binding each of the elements with an annular ring through which the slits are inserted.

In the primary pulley 3, the rotational driving force of a driving source (not shown) is input and rotates around the rotation axis X1 (the center of the axis of the primary pulley).

The secondary pulley 4 is rotatably provided around a rotation axis X2 (the center of the axis of the secondary pulley) parallel to the rotation axis X1.

The power transmission member 5 is wound around the outer periphery of the primary pulley 3 and the outer periphery of the secondary pulley 4. The rotational driving force input to the primary pulley 3 is transmitted to the secondary pulley 4 through the power transmission member 5.

In the variator 2, when transmitting rotational driving force from the primary pulley 3 to the secondary pulley 4, the winding radius of the power transmission member 5 in the primary pulley 3 and the secondary pulley 4 ), The winding radius of the power transmission member 5 is changed.

Thereby, the rotational driving force input to the primary pulley 3 is shifted to a desired transmission ratio, and transmitted to the secondary pulley 4.

Here, the transmission ratio is determined according to the winding radius of the power transmission member 5 in the primary pulley 3 and the secondary pulley 4. The transmission radius of the automatic transmission 1 is determined by the transmission controller 9 (ATCU) of the automatic transmission 1 based on the running state of the vehicle on which the automatic transmission 1 is mounted.

The rotational driving force transmitted to the secondary pulley 4 is finally transmitted to the drive wheel (not shown) through the gear train 6, the final gear 7, and the differential device 8.

In this embodiment, the transmission mechanism part is comprised of the variator 2, the gear train 6, and the final gear 7.

The horizontal line H1 passing through the rotation axis X1 of the primary pulley 3 is located below the horizontal line H2 passing through the rotation axis X2 of the secondary pulley 4 in the vertical direction. The rotation axis X1 of the primary pulley 3 and the rotation axis X2 of the secondary pulley 4 are spaced apart in the vertical direction.

Inside the transmission case 10, the primary pulley 3 is disposed below the secondary pulley 4 in the vertical direction.

Here, the term "vertical line" in this specification means a line parallel to the direction of gravity, and the term "horizontal line" means a line perpendicular to the direction of gravity.

The gear train 6 and the final gear 7 and the secondary pulley 4 are arranged spaced apart in the direction of the rotation axis X2 of the secondary pulley 4. In the case of Fig. 1, the gear train 6 and the final gear 7 are located in front of the ground than the secondary pulley 4.

In the case of FIG. 1, inside the transmission case 10, the primary pulley 3 and the secondary pulley 4 are located inside the ground. The gear train 6 and the final gear 7 are located in front of the ground. The transmission case 10 shown in FIG. 1 has depth in front and inside of the ground, and a driving source (not shown) is located in front of the ground than the transmission case 10.

An oil pan 15 is provided under the transmission case 10. The oil pan 15 closes the opening 16 on the lower side of the transmission case 10 to form a third chamber S3 that serves as a storage space for oil OL at the lower portion of the transmission case 10.

The control valve unit 17 is located in the third chamber S3. The control valve unit 17 is also fixed to the lower portion of the transmission case 10, and the oil strainer 18 attached to the control valve unit 17 is located in the oil OL stored in the oil pan 15. .

The circumferential wall 11 of the transmission case 10 forms a first chamber S1 serving as an accommodation space for the transmission mechanism portion inside the transmission case 10.

The first chamber S1 includes an accommodation space of the variator 2 or an accommodation space of the gear train 6 and the final gear 7.

The space in the transmission case 10 is formed by the partition wall 111 formed on the lower portion of the peripheral wall 11, the third chamber S3 on the oil pan 15 side, and the transmission mechanism portion (variator 2). It is divided into the first chamber (S1) on the) side.

The peripheral wall 11 has a partition wall portion 12 extending in the vertical direction of the primary pulley 3. The partition wall portion 12 is located on the vehicle front side (radiator RAD) side with the automatic transmission 1 mounted on the vehicle.

On the outer periphery of the partition wall portion 12, an oil cooler 20 and an electric oil pump 21 are provided. In the partition wall portion 12, the electric oil pump 21 is provided on the oil pan side (lower side in the vertical direction) than the oil cooler 20.

Viewed from the direction of the rotational axis X1 of the primary pulley 3, the vertical line V1 passing through the rotational axis X1 of the primary pulley 3 is between the vertical line V2 passing through the rotational axis X2 of the secondary pulley 4 and the oil cooler 20. Located in.

Viewed from the direction of the rotational axis X1 of the primary pulley 3, the position of the vertical line V1 passing through the rotational axis X1 of the primary pulley 3 is a vertical line V2 passing through the rotational axis X2 of the secondary pulley 4, and an electric oil pump ( 21) You may be between.

The partition wall portion 12 has a first wall 121 on which an oil cooler 20 is attached, and a second wall 122 on which an electric oil pump 21 is attached. The second wall 122 is located below the first wall 121 in the vertical direction.

The thickness W1 of the first wall 121 in the horizontal line H1 direction is thicker than the thickness W2 of the second wall 122 in the horizontal line H1 direction. The surface 122a on the electric oil pump 21 side of the second wall 122 is closer to the primary pulley shaft 31 than the surface 121a on the oil cooler 20 side of the first wall 121. It is placed in position.

Therefore, the end 21a of the primary pulley 3 side (left side in the figure) of the electric oil pump 21 in the horizontal line H1 direction is a primary pulley of the oil cooler 20 in the horizontal line H1 direction. It is located on the primary pulley 3 side, rather than the end portion 20a on the (3) side (left in the figure).

The end portion 21a of the electric oil pump 21 and the end portion 20a of the oil cooler 20 are spaced apart in the horizontal line H1 direction. Moreover, the center of gravity of the electric oil pump 21 is located closer to the rotation axis X1 than the center of gravity of the oil cooler 20.

The first wall 121 is provided with a receiving portion 121b of the oil filter 201. The accommodating part 121b is provided in the direction along a perpendicular line direction. The oil filter 201 is attached to and detached from the upper portion in the vertical direction with respect to the receiving portion 121b.

In this embodiment, the oil OL cooled by the oil cooler 20 is returned to the first chamber S1 side through the oil filter 201.

As described above, the partition wall 111 of the transmission case 10 includes a space in the transmission case 10, a third chamber S3 on the oil pan 15 side and a transmission mechanism portion (variator 2). It is divided into the first room S1 on the side.

Viewed from the rotation axis X1 direction, the partition wall 111 is formed in a range that extends beyond the surface 121a (outer circumferential surface) of the first wall 121 of the partition wall portion 12 (on the radiator RAD side).

In the partition wall 111, an area located outside (radiator RAD side) of the surface 121a (outer circumferential surface) of the first wall 121 is an expansion area 111a.

A wall portion 123 is formed on the upper side of the expansion region 111a in the vertical direction.

The wall portion 123 protrudes from the boundary between the first wall 121 and the second wall 122 toward the outside of the transmission case 10 (the radiator RAD side). The wall portion 123 is provided substantially parallel to the horizontal line H1.

In the transmission case 10, a second chamber S2 (electric oil pump chamber) for accommodating the electric oil pump 21 is formed between the wall portion 123 in the vertical V1 direction and the expansion region 111a. .

In the second chamber S2, the electric oil pump 21 is fixed to the surface 122a (outer periphery) of the second wall 122. In this state, the electric oil pump 21 surrounds the periphery with the expansion region 111a and the wall portion 123 of the partition wall 111.

The second chamber S2 is opened outside the transmission case 10 (in the radial direction outside of the rotational shaft X1), and the opening of the second chamber S2 is opposed to the radiator RAD.

The opening of the second chamber S2 is opened in the direction of the horizontal line H1, and the opening of the second chamber S2 is sealed by the wall portion 123 and the cover portion 126 fixed over the expansion region 111a. have.

The concave portion 126a is formed on the surface facing the second chamber S2 in the lid portion 126. The transmission controller 9 (ATCU) of the automatic transmission 1 is provided in the recess 126a. If the opening of the second chamber S2 is sealed with the lid portion 126, the transmission controller 9 (ATCU) installed on the lid portion 126 also includes the electric oil pump 21 and the second chamber S2. ).

As shown in FIG. 2B, a connector 127 electrically connected to the transmission controller 9 is integrally provided in the lid portion 126.

The connector 127 is exposed on the surface (outer surface) of the cover portion 126, and in FIG. 1, it is located inside the ground of the cover portion 126.

The transmission controller 9 is connected to another control device (for example, an engine control unit) mounted on the vehicle through external wiring connected to the connector 127.

The communication hole 112 formed in the expansion region 111a of the partition wall 111 is opened in the second chamber S2. The communication hole 112 penetrates the expansion region 111a in the vertical direction, and the communication hole 112 has the shortest distance between the second chamber S2 and the third chamber S3 in the oil pan 15. It is communicating on the street.

The wire harness 128 extending from the transmission controller 9 (ATCU) passes through the communication hole 112 and is drawn to the oil pan 15 side, and is then connected to the control valve unit 17.

The transmission controller 9 (ATCU) is a control valve unit 17 with a wire harness 128 having a length shorter than that of the conventional example (see Fig. 7) in which the transmission controller 9 (ATCU) is installed on the vehicle side. It is connected to.

In the control valve unit 17, a flow path through which oil OL flows, a pressure regulating valve for regulating the pressure (hydraulic pressure) of oil OL, a switching valve for switching the supply destination of oil OL, and the like are provided.

The transmission controller 9 outputs a drive signal (command) through a wire harness 128 to a solenoid driving a pressure regulating valve or a switching valve. Further, output signals such as sensors installed in the transmission case 10 are input to the transmission controller 9 through the wire harness 128.

A flow path 129 for connecting the electric oil pump 21 and the control valve unit 17 is provided inside the second wall 122 where the electric oil pump 21 is fixed.

The flow path 129 extends linearly in the vertical direction, and connects the control valve unit 17 and the electric oil pump 21 at the shortest distance.

When the electric oil pump 21 is driven, the oil OL in the oil pan 15 is drawn into the oil strainer 18. The oil OL sucked into the oil strainer 18 is supplied to the electric oil pump 21 through a flow path (not shown) in the control valve unit 17 and a flow path (not shown) in the second wall 122. do.

The electric oil pump 21 pressurizes the sucked oil OL, and then supplies it to the control valve unit 17 through the flow path 129 in the second wall 122.

Further, the flow path 129 extends in the vertical direction from the inside of the second wall 122, and connects the control valve unit 17 and the electric oil pump 21 at the shortest distance.

The control valve unit 17 drives a switching valve or a pressure regulating valve based on a command from the transmission controller 9 (ATCU), and is necessary for driving or lubrication of the automatic transmission 1 (variator 2). Adjust the hydraulic pressure.

In addition, a hydraulic drive device (for example, a variator 2 or a friction fastening device (not shown)) provided in the automatic transmission 1 is driven by the hydraulic pressure (oil) that is pressurized, and a portion requiring lubrication is driven. Is lubricated.

Hereinafter, the assembly procedure of the electric oil pump 21 and the transmission controller 9 in the automatic transmission 1 which has such a structure is demonstrated.

In the transmission case 10, the second chamber S2 is opened on the outer surface of the peripheral wall 11 (the outer surface in the radial direction of the rotation axis X1).

Initially, the electric oil pump 21 is inserted into the second chamber S2 from the opening of the second chamber S2, and then the electric oil pump 21 is exposed in the second chamber S2. The surface 122a of the second wall 122 is fixed with a bolt (not shown).

The cover part 126 in which the transmission controller 9 (ATCU) is installed in the recessed part 126a is prepared, and the front end side of the wire harness 128 drawn out from the transmission controller 9 is connected to the communication hole 112. Insert it.

The wire harness 128 inserted in the communication hole 112 is taken out to the third chamber S3 side, and then connected to a connector (not shown) provided in the control valve unit 17.

The control valve unit 17 to which the wire harness 128 is connected is bolted to the lower portion of the transmission case 10.

The opening of the second chamber S2 is closed with the surface of the transmission controller 9 in the lid portion 126, and the periphery of the lid portion 126 is formed with the expansion region 111a of the transmission case 10. The wall 123 is fixed with a bolt (not shown). At this time, the wire harness 128 is accommodated in the gap in the second chamber S2.

Here, the second chamber S2 is a space formed independently from the first chamber S1 and the third chamber S3. The second chamber S2 is a second wall 122 of the transmission case 10, is divided from the first chamber S1, and is an expansion region 111a of the partition wall 111, and the third chamber ( S3).

Therefore, the 2nd chamber S2 is divided from the 1st chamber S1 which accommodates a transmission mechanism part (rotator), or the 3rd chamber S3 which stores oil.

In the expansion region 111a, a communication hole 112 communicating the second chamber S2 and the third chamber S3 is formed, but the communication hole 112 is a wire provided in the communication hole 112. With the harness 128, the opening range is narrowed.

In addition, unlike the first chamber S1, the third chamber S3 is not provided with a rotating body that sweeps the oil. Then, the second chamber S2 is provided above the third chamber S3 in the vertical direction.

Therefore, the hydraulic oil (oil) in the third chamber S3 is unlikely to flow into the second chamber S2, and the transmission controller 9 installed in the second chamber S2 is high temperature and has a large amount of hydraulic oil. It is not always exposed to (oil).

In addition, the communication hole 112 penetrates the expansion region 111a in a vertical direction, and the communication hole 112 communicates the second chamber S2 and the third chamber S3 at the shortest distance. .

Therefore, the electric length of the wire harness 128 can be shortened, so that the electrical resistance of the wire harness 128 can be reduced, and errors in signals (sensor signals, commands) exchanged through the wire harness 128 are possible. Occurrence can be suppressed.

In addition, as the length of the wire harness 128 is shortened, it is possible to reduce the cost.

Further, since the transmission controller 9 is mounted on the cover portion 126, after installing the electric oil pump 21 in the second chamber S2, the opening of the second chamber S2 is opened to the lid portion 126. By blocking with, the installation of the transmission controller 9 is also completed simultaneously.

Therefore, since the installation of the electric oil pump 21 and the transmission controller 9 can be performed almost simultaneously, these assembling operations become easy.

In addition, since the number of parts required is less than when the electric oil pump 21 and the transmission controller 9 are separately installed, the cost associated with the reduction in the number of parts can be reduced. In addition, since space required for installation of the electric oil pump 21 and the transmission controller 9 is reduced, a space saving effect can be expected.

Hereinafter, the operation of the automatic transmission 1 having such a configuration will be described.

When the rotational driving force of the drive source is input to the automatic transmission 1, the primary pulley 3 rotates around the rotation axis X1.

In this state, in the automatic transmission 1, resonances (power plant resonance) caused by vibrations of the driving source and vibrations of the automatic transmission 1 itself are generated.

Here, the electric oil pump 21 laid on the surface (outer periphery) of the transmission case 10 vibrates under the influence of power plant resonance to generate noise.

The electric oil pump 21 has a relatively large weight among the components of the automatic transmission 1. Therefore, the contribution to noise generated by power plant resonance is large.

The present inventors, the closer to the node of the power plant resonance (where the amplitude is small), the smaller the amplitude when vibrating due to resonance, whereby the degree of noise (sound) generated by vibration (acoustic power level) Note that) becomes smaller and is effective in reducing the sound level.

Then, the electric oil pump in the peripheral wall 11 so that the electric oil pump 21 laid on the outer periphery of the peripheral wall 11 approaches the rotation axis X1 of the primary pulley 3 which is a node of power plant resonance. The arrangement of the electric oil pump 21 in the region where (21) was laid was studied.

Specifically, the thickness of the second wall 122 on which the electric oil pump 21 was fixed was made thinner than the first wall 121 on which the oil cooler 20 was fixed.

Thereby, the surface 122a on the side of the electric oil pump 21 of the second wall 122 is the primary pulley shaft 31 than the surface 121a on the side of the oil cooler 20 of the first wall 121. ). Then, the end 21a of the primary pulley 3 of the electric oil pump 21 is located in the primary pulley 3 rather than the end 20a of the primary pulley 3 of the oil cooler 20. It is arranged near the rotation axis X1.

That is, the electric oil pump 21 was disposed closer to the node of the power plant resonance (primary pulley shaft 31). Thereby, the amplitude of the electric oil pump 21 which vibrates by the power plant resonance becomes small.

Here, the acoustic power level resulting from the power plant resonance decreases as the amplitude of the sound source becomes smaller.

Therefore, by making the electric oil pump 21 closer to the node of the power plant resonance, the amplitude of the electric oil pump vibrating by the power plant resonance is reduced, and the sound of noise generated by the vibrating electric oil pump is generated. The power level decreases.

That is, the acoustic power level is lowered, which is advantageous for sound isolation.

As described above, the automatic transmission 1 according to the embodiment has the following configuration.

(1) The automatic transmission 1 has an oil cooler 20, an electric oil pump 21, and a variator 2.

The variator 2 has a primary pulley 3, a secondary pulley 4, a primary pulley 3, and a power transmission member 5 wound around the secondary pulley 4.

Viewed from the drive source (not shown) side in the rotation axis X1 direction, the vertical line V1 passing through the axis center (rotation axis X1) of the primary pulley 3 passes through the axis center (rotation axis X2) of the secondary pulley 4. Is located between the vertical line V2 and the oil cooler 20.

The vertical line V1 passing through the axis center (rotation axis X1) of the primary pulley 3 is located between the vertical line V2 passing through the axis center (rotation axis X2) of the secondary pulley 4 and the electric oil pump 21. The end 21a on the primary pulley 3 side of the electric oil pump 21 is located closer to the primary pulley 3 than the end 20a on the primary pulley 3 side of the oil cooler 20. Is placed in.

In the automatic transmission 1 (CVT), resonance of the driving source and CVT (power plant resonance) is generated.

The inventor of this application paid attention to the following points.

(a) The closer the installation location of the electric oil pump is to the node of the power plant resonance (where the amplitude is small), the lower the acoustic power level is, which is advantageous for sound isolation.

(b) As the installation location of the electric oil pump moves away from the node of the power plant resonance (where the amplitude is small), the sound performance is deteriorated.

(c) In CVT, the node of the power plant resonance is the primary pulley shaft 31.

Then, as described above, the primary pulley of the electric oil pump 21 on the primary pulley 3 side of the oil cooler 20 is compared to the primary 20 of the primary pulley 3 side of the oil cooler 20. The electric oil pump 21 was placed close to the primary pulley shaft 31 by arranging it close to (3).

As a result, the amplitude when the electric oil pump 21 vibrates due to power plant resonance becomes smaller than that of the automatic transmission 1X according to the conventional example shown in FIG. 7.

Therefore, the degree of noise (acoustic power level) generated by vibration becomes small.

The automatic transmission 1 according to the embodiment further has the following configuration.

(2) The vertical wall V1 passing through the axis center (rotation axis X1) of the primary pulley 3 and the oil cooler 20 have a first wall 121.

The vertical wall V1 passing through the axis center (rotation axis X1) of the primary pulley 3 and the second wall 122 are provided between the electric oil pump 21.

The surface 122a on the electric oil pump 21 side of the second wall 122 is located closer to the primary pulley 3 than the surface 121a on the oil cooler 20 side of the first wall 121 Is placed in.

When configured in this way, the peripheral wall 11 of the transmission case 10 has a shape in which the second wall 122 is located on the primary pulley 3 side than the first wall 121.

Thus, by designing the transmission case 10 (the peripheral wall 11) so that the second wall 122 is offset from the primary pulley 3 side than the first wall 121, the electric oil pump 21 The end 21a of can access the primary pulley 3.

The automatic transmission 1 according to the embodiment further has the following configuration.

(3) Oil OL is supplied from the electric oil pump 21 to the control valve unit 17 through the flow path 129 formed in the second wall 122.

When the electric oil pump is attached to the outer periphery of the transmission case, it is common to supply the hydraulic oil from the electric oil pump to the control valve unit using a dedicated pipe tube provided as a separate member from the transmission case.

By installing the flow path 129 on the second wall 122 of the transmission case 10 as described above, without using a dedicated pipe tube provided as a separate member from the transmission case, the second wall 122 of Using the oil passage 129, the operating hydraulic pressure can be supplied from the electric oil pump 21 to the control valve unit 17.

By providing the flow path 129 using the second wall 122, the number of parts can be reduced compared to the case of using a dedicated pipe tube provided as a separate member from the transmission case. In addition, it is possible to shorten the overall length of the flow path connecting the electric oil pump 21 and the control valve unit 17.

The automatic transmission 1 (the continuously variable transmission) according to the embodiment further has the following configuration. (4) The first chamber S1 (shifting chamber) in which the transmission mechanism is disposed, and

A second chamber (S2) (electric oil pump chamber) in which the electric oil pump 21 is disposed, and

It has a transmission controller 9 disposed in the second chamber S2.

The first chamber S1 and the second chamber S2 are partitioned (separated) by the partition wall portion 12.

When configured in this way, the transmission controller 9 is arranged in the second chamber S2 (electric oil pump chamber) separated from the first chamber S1 (transmission mechanism chamber), whereby the transmission controller 9 has a large amount of high-temperature hydraulic oil. It can be prevented from being exposed to.

The automatic transmission 1 further has the following configuration.

(5) It has the 3rd chamber S3 (control valve unit chamber) in which the control valve unit 17 is arrange | positioned.

It has a communication hole 112 (hole) communicating the second chamber S2 and the third chamber S3.

The third chamber S3 is located directly below the second chamber S2 in the vertical direction.

The transmission controller 9 and the control valve unit 17 are connected via a wire harness 128 through which the communication hole 112 is inserted.

With this configuration, the communication hole 112 communicates the second chamber S2 and the third chamber S3 at the shortest distance, so that the wire harness connecting the transmission controller 9 and the control valve unit 17 ( 128) can be shortened.

When the length of the wire harness 128 is shortened, it is possible to expect a decrease in the electrical resistance of the wire harness 128 and / or a decrease in cost.

The automatic transmission 1 (stepless transmission) further has the following configuration.

(6) the first chamber S1 in which the transmission mechanism is disposed, and

A second chamber S2 in which the transmission controller 9 is disposed,

It has a cover portion 126 constituting at least a part of the second chamber (S2),

The transmission controller 9 is mounted on the cover 126.

When the transmission controller 9 is mounted on the cover portion 126, when the cover portion 126 is installed on the transmission case 10 to form the second chamber S2, the transmission controller 9 is also made. It will be installed in two rooms (S2) at the same time.

Therefore, assembling of the transmission controller 9 becomes easier as compared to the case where the transmission controller 9 is provided separately from the cover portion 126.

In addition, when the transmission controller 9 is installed separately from the cover portion 126, a dedicated component or the like for installing the transmission controller 9 is separately required. Since the transmission controller 9 is mounted on the cover portion 126, there is no need to separately prepare parts for installing the transmission controller 9. Thereby, an increase in the number of parts can be prevented, and an effect of reducing the number of parts can be expected.

In addition, since the transmission controller 9 is installed using the space in the second chamber S2 accommodating the electric oil pump 21, when the transmission controller 9 is installed outside the second chamber S2 Compared to this, a space saving effect is exhibited.

In addition, in the embodiment, a concave portion 126a is formed on a surface facing the second chamber S2 in the cover portion 126, and a transmission controller 9 is provided in the concave portion 126a. Illustrated case.

When the recessed part 126a is not formed in the cover part 126, the cover part is fixed by fixing the transmission controller 9 to the surface facing the second chamber S2 in the cover part 126 126 and the transmission controller 9 may be assembled.

The automatic transmission 1 (stepless transmission) further has the following configuration.

(7) It has a connector 127 connected to the transmission controller 9.

The connector 127 is mounted on the cover portion 126 and is exposed on the surface of the transmission case 10.

With this configuration, the transmission controller 9 and the connector 127 are installed when the connector 127 is mounted on the cover portion 126 to complete the installation of the cover portion 126 to the transmission case 10 side. The assembly of is also completed.

Therefore, when the connector 127 is installed separately from the cover portion 126, a dedicated component or the like for installing the connector 127 is required separately. Since the connector 127 is mounted on the cover portion 126, there is no need to separately prepare parts for installing the connector 127. Thereby, an increase in the number of parts can be prevented, and an effect of reducing the number of parts can be expected.

In addition, since the connector 127 is provided on the cover portion 126, the space for installation can be suppressed as compared to the case where the connector 127 is installed on another portion of the transmission case 10. Therefore, a space saving effect is exhibited.

In addition, in the embodiment, the case where the connector 127 is integrally provided with the cover portion 126 has been exemplified. The connector 127 may be formed of a member separate from the cover portion 126 and may be configured to be fixed to the cover portion 126.

Moreover, this invention can also be specified as a manufacturing method of the automatic transmission 1 (stepless transmission).

In other words,

(8) the first chamber (S1) in which the transmission mechanism is arranged,

A second chamber S2 in which the transmission controller 9 and the electric oil pump 21 are disposed,

It is a manufacturing method of an automatic transmission having a cover portion 126 constituting at least a part of the second chamber (S2),

After the electric oil pump 21 is disposed in the second chamber S2, it is a manufacturing method of the automatic transmission 1, characterized in that a cover portion 126 on which the transmission controller 9 is mounted is installed.

With this configuration, when the electric oil pump 21 and the transmission controller 9 are installed at approximately the same time, assembly of the electric oil pump 21 and the transmission controller 9 is performed by performing the installation work in the following procedure. It becomes easy.

(a) The electric oil pump 21 is first installed in the second chamber S2.

(b) The cover part 126 on which the transmission controller 9 is mounted is installed on the transmission case 10 side to close the opening of the second chamber S2.

Hereinafter, the features of the present invention are listed together with effects as necessary.

(9) The horizontal line H1 passing through the axis center (rotation axis X1) of the primary pulley 3 is located below the vertical line in the vertical direction than the horizontal line H2 passing through the axis center (rotation axis X2) of the secondary pulley 4. have.

The electric oil pump 21 is located below the oil cooler 20 in the vertical direction.

The electric oil pump by determining the vertical relationship between the electric oil pump 21 and the oil cooler 20 according to the vertical relationship in the vertical direction of the two pulleys (primary pulley 3 and secondary pulley 4) (21) can be accessed to the primary pulley (3).

(10) The electric oil pump 21 is located between the oil cooler 20 and the control valve unit 17 when viewed from the rotational axis X1 direction.

Oil is supplied from the electric oil pump 21 to the control valve unit 17 through the flow path 129 formed in the second wall 122.

Since the flow path 129 can be shortened, the drop in strength of the transmission case 10 can be suppressed.

(11) The automatic transmission 1 is mounted on the vehicle.

The oil cooler 20 and the electric oil pump 21 are arranged between the radiator RAD mounted on the vehicle and the vertical line V1 passing through the axis center (rotation axis X1) of the primary pulley 3 as viewed from the rotation axis X1 direction. have.

The oil cooler 20 and the electric oil pump 21 are disposed on the front side in the vehicle. Since the electric oil pump 21 can be disposed by utilizing the gap between the radiator RAD and the transmission case 10, in installing the electric oil pump 21 to the outer circumference (surface) of the transmission case 10, It is not necessary to change the layout on the vehicle side.

(12) In the second chamber S2 (electric oil pump chamber) including the second wall 122, the electric oil pump 21 is disposed.

In the second chamber S2, the transmission controller 9 (ATCU) is disposed.

When the vehicle on which the automatic transmission 1 is mounted is a hybrid vehicle that includes both an engine and a motor as a driving source, an MCU (motor controller) is also disposed in the second chamber S2.

The first chamber S1 accommodating the pulleys (primary pulley 3, secondary pulley 4) is under an environment exposed to a large amount of hydraulic oil (oil). By placing the controller (transmission controller 9, motor controller) in the second room S2, which is a room partitioned from the first room S1, the controller (transmission controller 9, motor controller) has a large amount of high-temperature hydraulic oil. It can be prevented from being exposed to.

(13) The oil filter 201 is disposed between the oil cooler 20 and the vertical line V1 passing through the axis center (rotation axis X1) of the primary pulley 3, viewed from the rotation axis X1 direction.

The oil filter 201 is provided in the first wall 121 on which the oil cooler 20 is placed.

The thickness W1 in the horizontal line H1 direction of the first wall 121 on which the oil cooler 20 is laid is thicker than the thickness W2 in the horizontal line H1 direction of the second wall 122 on which the electric oil pump 21 is laid.

The thickness W1 in the horizontal line H1 direction of the first wall 121 is different from the thickness W2 in the horizontal line H1 direction of the second wall 122, so that the distance from the primary pulley shaft 31 to the oil cooler 20 is increased. , It is longer than the distance from the primary pulley shaft 31 to the electric oil pump 21.

That is, the thickness of the 1st wall 121 and the 2nd wall 122 is made different, and the oil cooler 20 is arrange | positioned away from the primary pulley shaft 31 rather than an electric oil pump.

Thereby, the space in which the oil filter 201 is disposed can be secured in the first wall 121.

Thereby, the oil filter 201 can be arrange | positioned near the oil cooler 20. If the oil filter 201 and the oil cooler 20 are spaced apart, it is necessary to separately prepare a long tube communicating the oil filter 201 and the oil cooler 20.

By arranging the oil filter 201 near the oil cooler 20, it is not necessary to prepare a long tube separately, so that the number of parts can be reduced.

Further, the electric oil pump 21 having a larger mass than the oil cooler 20 can be disposed closer to the power plant resonance node (primary pulley shaft 31).

Thereby, the amplitude of the electric oil pump 21 vibrating by the power plant resonance becomes small, and the acoustic power level of the noise generated by the vibrating electric oil pump 21 becomes small.

(14) Between the second chamber S2 (the room where the electric oil pump 21 and the transmission controller 9 are accommodated) and the third chamber S3 (the room where the control valve unit 17 is disposed), the second It has a partition wall 111 (third wall) that divides the two rooms S2 and the third room S3.

In the expansion region 111a in the partition wall 111, a communication hole 112 for communicating the second chamber S2 and the third chamber S3 is formed.

The communication hole 112 is formed in a straight line along a vertical line, and the second chamber S2 and the third chamber S3 are communicated at the shortest distance.

The transmission controller 9 and the control valve unit 17 are connected to each other by a wire harness 128 through which the communication hole 112 is inserted.

The wire harness 128 connecting the transmission controller 9 and the control valve unit 17 can be shortened, so that the resistance and cost of the wire harness 128 can be reduced.

3 and 4 are views for explaining a modified example of the arrangement of the transmission controller 9 in the transmission case 10.

In the above-described embodiment, the second wall 122 of the partition wall portion 12, the wall portion 123, the expansion region 111a, and the lid portion 126, the agent for receiving the electric oil pump 21 The case where two rooms (S2) (electric oil pump rooms) were formed was illustrated.

As with the automatic transmission 1A shown in Fig. 3 (a), the outer periphery of the second wall 122 is adopted by employing a cover portion 126A with a deeper depth of the concave portion 126a in the horizontal line H1 direction. The second chamber S2 may be formed only by the cover portion 126A laid on the surface.

In the above-described embodiment, the case where the transmission controller 9 is installed in the concave portion 126a of the cover portion 126 in the second chamber S2 has been exemplified.

As in the automatic transmission 1B shown in FIG. 4, the transmission controller 9 may be configured to be provided on the upper surface 111b of the expansion region 111a in the vertical direction.

In this case, the transmission controller 9 can be disposed closer to the control valve unit 17 than when the transmission controller 9 is provided in the recess 126a of the lid portion 126.

As a result, the overall length of the wire harness 128 can be shortened, so that the occurrence of errors in signals (sensor signals, commands) exchanged through the wire harness 128 can be suppressed.

In the above-mentioned embodiment, the case where the 2nd chamber S2 is the electric oil pump chamber which accommodates the electric oil pump 21 and the transmission controller 9 (ATCU) was accommodated in this electric oil pump chamber was illustrated.

The place where the transmission controller 9 is installed is not limited to the second room S2. For example, a storage chamber for accommodating other parts of the automatic transmission such as the control valve unit 17 or the oil filter 201 may be used.

5 is a view for explaining a modification of the arrangement of the transmission controller 9 in the transmission case 10, and when the transmission controller 9 is disposed in the third chamber S3 (control valve unit chamber) It is a figure explaining.

As shown in Fig. 5, in this automatic transmission 1C, a concave portion 151 for accommodating the transmission controller 9 is provided in the oil pan 15.

The transmission controller 9 is disposed in the third chamber S3 (control valve unit chamber) while being disposed in the concave portion 151. The transmission controller 9 is prevented from being displaced in the oil pan 15 in a state accommodated in the concave portion 151.

That is, the automatic transmission 1C has the following configuration.

(15) The first chamber (S1) in which the transmission mechanism is disposed, and

A second chamber (S2) in which the electric oil pump 21 is disposed,

It has a 3rd chamber S3 in which the control valve unit 17 is arrange | positioned.

The third chamber S3 is formed inside the oil pan 15 (cover portion) provided under the transmission case 10.

The transmission controller 9 is provided in the oil pan 15.

With this configuration, since the transmission controller 9 is installed in the existing oil pan 15, a large design change around the oil pan 15 is not required in order to install the transmission controller 9.

In particular, since the transmission controller 9 is installed in the concave portion 151 formed in the oil pan 15, in installing the transmission controller 9 to the existing oil pan 15, separate parts Does not need.

Accordingly, the transmission controller 9 and the control valve unit 17 can be connected at a short distance while suitably preventing the increase in manufacturing cost due to an increase in the number of parts.

Further, since the transmission controller 9 is disposed closer to the control valve unit 17, the overall length of the wire harness 128 can be shortened.

Thereby, it is possible to reduce the electrical resistance of the wire harness 128, and it is possible to suppress the occurrence of errors in signals (sensor signals, commands) exchanged through the wire harness 128. In addition, as the length of the wire harness 128 is shortened, it is possible to reduce the cost.

Moreover, in the case of the automatic transmission 1C of FIG. 5, the manufacturing method of the above-described automatic transmission can be specified as follows.

(16) The automatic transmission includes a first chamber S1 (shifting chamber) in which the transmission mechanism is disposed,

A second chamber (S2) in which the electric oil pump 21 is disposed,

It has a 3rd chamber S3 in which the control valve unit 17 is arrange | positioned.

The third chamber S3 is formed inside the oil pan 15 fixed to the lower portion of the transmission case 10. The transmission controller 9 is provided in the oil pan 15.

The automatic transmission 1C connects the wire harness 128 extending from the transmission controller 9 to the control valve unit 17, and then connects the control valve unit 17 to the transmission case 10 in the third chamber S3. ), And install the oil pan (15) on which the transmission controller (9) is installed in the transmission case (10), and block the opening (16) at the bottom of the transmission case (10) with the oil pan (15). It is produced by forming three chambers (S3).

With this configuration, when the control valve unit 17 (another member) and the transmission controller 9 are installed at the same time, the assembly is facilitated by installing the oil pan 15 (cover portion) later.

In installing the transmission controller 9, since a separate component is not required, an increase in manufacturing cost can be suitably suppressed.

6 is a view for explaining a modification of the arrangement in the transmission case 10 of the transmission controller 9, and the oil cooler 20 is installed on the upper part of the partition wall portion 12 in the vertical direction. It is a figure explaining the case of the transmission 1D.

In the partition wall portion 12 of the transmission case 10 of the automatic transmission 1D, an oil cooler 20 is provided above the first wall 121 in the vertical direction.

The first wall 121 is thicker in the horizontal H2 direction than the second wall 122 on the oil pan 15 side.

A receiving portion 121c of the oil filter 201 is provided on the first wall 121. The accommodating part 121c is provided in the direction along the horizontal line H2 direction. The oil filter 201 is detached from the vehicle front side in the horizontal line H2 direction with respect to the housing portion 121c.

Even in the case of the automatic transmission 1D, the oil OL cooled in the oil cooler 20 is returned to the first chamber S1 side through the oil filter 201.

In the partition wall portion 12, a cover portion 126 for closing the opening of the receiving portion 121c is provided on the front surface of the vehicle.

The lid part 126 has a recessed part 126a on the surface facing the partition wall part 12, and the transmission controller 9 is accommodated in this recessed part 126a.

In addition, a connector (not shown) is provided on the surface of the cover portion 126, and the transmission controller 9 is equipped with another control device mounted on the vehicle (eg, through an external wiring connected to the connector 127). For example, the engine control unit).

The cover portion 126 is provided over the first wall 121 and the second wall 122. The area between the partition wall portion 12 and the recessed portion 126a of the lid portion 126 is a filter chamber (fourth chamber S4) for partitioning the oil filter 201 from the outside.

In the region facing the lid portion 126 of the second wall 122, a communication hole 130 communicating the fourth chamber (filter chamber) S4 and the third chamber S3 is opened.

The wire harness 128 extending from the transmission controller 9 is drawn out into the third chamber S3 through the communication hole 130 and connected to the control valve unit 17 in the third chamber S3. It is.

In addition, in the automatic transmission 1D, the oil filter 201 is disposed in the fourth chamber S4, and the lid portion 126, which is a member related to the oil cooler 20, is used as the lid of the fourth chamber S4. I am using it.

By making the oil cooler 20 slightly away from the electric oil pump 21, a space for arranging the oil filter 201 can be secured. Thereby, the oil filter 201 can be arrange | positioned near the oil cooler 20. Therefore, a long tube communicating the oil filter 201 and the oil cooler 20 becomes unnecessary, and the number of parts can be reduced.

As described above, the automatic transmission 1D has the following configuration.

(17) The first chamber (S1) in which the transmission mechanism is disposed, and

A second chamber (S2) in which the electric oil pump 21 is disposed,

A fourth chamber (S4) which becomes a filter chamber of the oil filter 201 of the oil cooler 20,

It has a cover portion 126 constituting at least a part of the fourth chamber (S4),

The transmission controller 9 is mounted on the cover 126.

With this configuration, since the transmission controller 9 is provided in the cover portion 126 that partitions the existing filter chamber (receiving chamber) of the oil filter 201, the transmission controller 9 is installed in the oil filter 201. In installing in the 4th room S4 which is a storage room, a separate component is not required. Therefore, an increase in cost for the installation of the transmission controller 9 can be suitably suppressed.

In this case, the manufacturing method of the above-described automatic transmission can be specified as follows.

(16) The automatic transmission includes a first chamber S1 (shifting chamber) in which the transmission mechanism is disposed,

A second chamber (S2) in which the electric oil pump 21 is disposed,

A fourth chamber (S4) which is a receiving chamber of the oil filter 201,

It has a cover portion 126 constituting at least a part of the fourth chamber (S4).

The transmission controller 9 is mounted on the cover 126.

The automatic transmission is produced by arranging the oil filter 201 in the fourth chamber S4, and then installing the cover portion 126 on which the transmission controller 9 is installed.

With this configuration, when the oil filter 201 (another member) and the transmission controller 9 are installed at the same time, the assembly is facilitated by installing the cover 126 later.

The number of parts can be reduced by mounting the transmission controller 9 and / or connectors on the parts on the oil cooler 20 side, which is preferable.

In the above-described embodiment, the case of the belt-type continuously variable transmission mechanism is exemplified, but the power transmission member 5 of the belt-type automatic transmission 1 for vehicles (CVT) includes a primary pulley 3 and a secondary pulley ( 4) As long as it can transmit rotation between them.

Therefore, the continuously variable transmission may be a chain-type continuously variable transmission mechanism.

As mentioned above, although embodiment of this invention was described, this invention is not limited only to the aspect shown in these embodiments. It is possible to appropriately change within the scope of the technical spirit of the invention.

1, 1A to 1D: automatic transmission
10: Transmission case
11: surrounding wall
111: partition wall
111a: bulge region
111b: Upper side
112: communication hole
112a: surface
12: partition wall
121: the first wall
121a: surface
121b: accommodation
121c: Receptacle
122: second wall
122a: surface
123: wall
126, 126A: cover
126a: recess
127: connector
128: wire harness
129: Euro
130: communication hole
15: oil pan
151: recess
16: opening
17: control valve unit
18: Oil strainer
2: Variator
20: oil cooler
20a: end
21: Electric oil pump
21a: end
201: oil filter
3: primary pulley
31: primary pulley shaft
4: Secondary pulley
41: secondary pulley axis
5: Power transmission member (belt)
6: gear train
7: Final Gear
8: Differential
9: Transmission controller
H1, H2: Horizon
OL: oil (working oil)
RAD: Radiator
S1: Room 1
S2: Room 2
S3: Room 3
S4: Room 4
V1, V2: Vertical line
X1, X2: rotating shaft

Claims (3)

Oil cooler,
Electric oil pump,
Primary pulley, secondary pulley,
A variator having a power transmission member wound around the primary pulley and the secondary pulley,
The vertical line parallel to the direction of gravity passing through the axis center of the primary pulley is located between the vertical line parallel to the direction of gravity passing through the axis center of the secondary pulley, and the oil cooler,
The vertical line parallel to the direction of gravity passing through the axial center of the primary pulley is located between the vertical line parallel to the direction of gravity passing through the axis center of the secondary pulley, and the electric oil pump,
The end portion on the primary pulley side of the electric oil pump is disposed closer to the primary pulley than the end on the primary pulley side of the oil cooler,
A vertical wall parallel to the direction of gravity passing through the axial center of the primary pulley and a first wall between the oil coolers,
A vertical line parallel to the direction of gravity passing through the axial center of the primary pulley, and a second wall between the electric oil pump,
Automatic transmission, characterized in that through the flow path formed in the second wall, to supply the hydraulic fluid from the electric oil pump to the control valve unit. According to claim 1,
The automatic transmission according to claim 2, wherein the surface of the second wall on the side of the electric oil pump is disposed closer to the primary pulley than the surface of the first wall on the side of the oil cooler. The method according to claim 1 or 2,
The automatic transmission is characterized in that the oil cooler is disposed at a position overlapping with the electric oil pump in the direction of gravity.

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