JP7261781B2 - transaxle - Google Patents

Description

The present invention relates to transaxles.

In recent years, two electric motors, a first electric motor (MG1) for power generation and a second electric motor (MG2) for driving, are provided. A hybrid vehicle (series hybrid vehicle) that runs by being driven by an electric motor has been provided.

In order to cool the electric motor of such a hybrid vehicle, the transaxle of the hybrid vehicle is provided with oil passages for cooling the electric motor and lubricating various gears. An oil pump is provided for

Patent Document 1 discloses an engine gear (input shaft) having a gear portion to which power from the engine is transmitted, bearings arranged so as to be close (adjacent) to both sides of the gear portion of the engine gear, and the engine gear. A lubricating structure for a hybrid vehicle is disclosed that includes an integrally formed oil pump shaft and an oil pump gear held by the oil pump shaft so as not to rotate relative to each other.

Further, in the above Patent Document 1, when the engine is driven, the power of the engine is transmitted to the gear portion of the engine gear, and the rotation of the engine gear rotates the oil pump shaft so that the oil pump shaft is integrated with the oil pump shaft. It is disclosed that oil is discharged from the oil pump as the pump gear rotates, thereby cooling the electric motor and lubricating various gears.

JP-A-2020-1643

However, when bearings are provided close (adjacent) to both sides of the gear part of the engine gear, the reaction force of the engine gear tilts the axis of the engine gear, which causes vibration and noise. There is a problem. In addition, in order to suppress the generation of vibration and noise, when the oil pump shaft is supported by a bush or the like to the case body, the oil pump may There is a problem that a large load is applied to the bush supporting the and the bush is seized.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transaxle capable of preventing bushing from seizing.

In order to achieve the above objects, the present invention is configured as follows.

(1) A transaxle according to the present invention includes an input shaft having a gear portion to which power is transmitted; an oil pump shaft rotatable by receiving power input via the input shaft; an oil pump operated by power input via the oil pump shaft; and the oil a bush for rotatably supporting the pump shaft with respect to the case body, wherein the oil pump shaft and the input shaft are coaxially arranged by separate bodies, and the ends of the shafts are connected to each other at a coupling portion; The oil pump shaft and the input shaft are coupled at the coupling portion such that they are integrally rotatable by being coupled, and the inclination of the axial center of the input shaft is allowed with respect to the oil pump shaft. characterized by

According to the above configuration, when power is transmitted to the gear portion of the input shaft, the inclination of the shaft center of the input shaft is directly transmitted to the oil pump shaft due to the reaction force applied to the gear portion of the input shaft. can be mitigated. That is, even if the input shaft is tilted, the tilting of the oil pump shaft can be suppressed in the same manner as the input shaft. As a result, the load on the bush of the oil pump shaft is reduced, so seizure of the bush that supports the oil pump shaft can be prevented. Moreover, according to the above configuration, the reliability of the oil pump can be improved by suppressing the inclination of the oil pump shaft.

(2) A transaxle according to the present invention has an input shaft having a gear portion for transmitting power, and is arranged in the axial direction of the input shaft with respect to the gear portion of the input shaft, and the input shaft is arranged with respect to the case body. and an oil pump shaft that is rotatable by receiving power input through the input shaft and has an oil pump shaft center oil passage for flowing the oil in the shaft center. an oil pump operated by power input through the oil pump shaft and provided with a discharge port for discharging the oil; and a bush provided with an orifice for flowing the oil pump shaft and the input shaft. The oil pump is integrally rotatable, and the oil discharged from the discharge port of the oil pump is configured to flow through the orifice of the bush to the oil pump shaft center oil passage. and

According to the above configuration, the oil discharged from the discharge port of the oil pump flows into the oil pump shaft center oil passage through the bush, so that sufficient oil can always be supplied to the bush. In addition, since the oil flows through the orifice of the bush, the amount of oil flowing from the bush to the oil pump shaft center oil passage can be easily adjusted by the orifice of the bush. As a result, seizing of the bush that supports the oil pump shaft can be prevented.

(3) In the transaxle according to the present invention, it is preferable that the bearing and the bush are arranged adjacent to each other along the axial direction. With this configuration, the distance between the bearing and the bushing is reduced, so that when the input shaft is tilted, the axial deflection of the oil pump shaft in the orthogonal direction can be reduced. Thereby, the load on the bush in the oil pump shaft can be reduced.

(4) The transaxle according to the present invention further includes an oil pump cover that houses the oil pump, the bearing is arranged on the oil pump side with respect to at least the gear portion, and the bearing and the bush are: It may be fixed to the oil pump cover. With this configuration, the oil pump cover can have both the function of fixing the bearing and the function of fixing the bush.

(5) In the transaxle according to the present invention, the oil pump is provided with a discharge port operated by power input through the oil pump shaft to discharge the oil, and the bush is provided on the inner peripheral side of the discharge port. Good to be located. With this configuration, the case body can be made compact (miniaturized).

(6) In the transaxle according to the present invention, one of the end of the input shaft and the end of the oil pump shaft is a protrusion, and the other of the end of the input shaft and the end of the oil pump shaft is a projection. , and a concave portion, and the convex portion and the concave portion are preferably engaged with each other at the engaging portion. According to this structure, the input shaft and the oil pump shaft can be easily rotatably coupled together simply by fitting the projection and the recess into each other.

(7) In this case, preferably, the convex portion and the concave portion are formed in a quadrangular shape in a cross-sectional view. According to this configuration, it is possible to reliably transmit the rotational force of the input shaft to the oil pump shaft while facilitating the work of fitting the input shaft and the oil pump shaft together.

(8) In the transaxle according to the present invention, the bearing is arranged at least on the oil pump side with respect to the gear portion, and the coupling portion between the input shaft and the oil pump shaft It is preferable to be located in the inner peripheral part of the With this configuration, the bearing can receive vibrations in the direction perpendicular to the axis at the joint between the input shaft and the oil pump shaft. As a result, it is possible to suppress the vibration of the oil pump shaft in the direction perpendicular to the axis due to the tilt of the input shaft.

(9) In the transaxle according to the present invention, the bearings that support the input shaft are a first bearing arranged on the oil pump side with respect to the gear portion, and the oil pump with respect to the gear portion. and a second bearing disposed on the opposite side, an oil pump shaft center oil passage for flowing the oil is provided at the shaft center of the oil pump shaft, and the oil pump shaft is provided at the shaft center of the input shaft. An input axial oil passage communicating with the pump axial oil passage is provided, and oil discharged from the oil pump flows to the first bearing via the oil pump axial oil passage, and the oil pump It is preferable to be configured to flow to the second bearing via the shaft center oil passage and the input shaft center oil passage. With this configuration, the oil discharged from the oil pump can be sufficiently supplied to the first bearing and the second bearing.

(10) In the transaxle according to the present invention, an oil pump shaft center oil passage for flowing the oil is provided at the shaft center of the oil pump shaft, and the bushing is provided at least to the input shaft relative to the oil pump. and the oil discharged from the oil pump may be supplied to the bush through the oil pump shaft center oil passage. With this configuration, the oil discharged from the discharge port of the oil pump flows to the bushing through the oil pump axial oil passage, so that a sufficient amount of oil can be supplied to the bushing.

According to the aspect of the present invention, it is possible to provide a transaxle capable of preventing seizure of the bush.

1 is a schematic diagram showing a vehicle and a transaxle provided in the vehicle according to an embodiment of the present invention; FIG. FIG. 3 is a schematic diagram showing the periphery of an oil pump of the transaxle; FIG. 4 is an enlarged schematic diagram showing the periphery of an oil pump of the transaxle and the flow of oil;

A vehicle V according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a vehicle V includes a transaxle 1. As shown in FIGS. The vehicle V also includes an engine, a battery, and the like (not shown).

The vehicle V is a so-called series hybrid vehicle. Specifically, the vehicle V can run by driving a first electric motor 20, which will be described later, using the engine as a power source, and by driving the first electric motor 20, a second electric motor 30, which will be described later, is driven. The vehicle V can run (EV running) by stopping the engine and using the battery as a power source to drive the second electric motor 30 .

The vehicle of the present invention is not limited to a series hybrid vehicle, and can be suitably employed in a parallel hybrid vehicle, an AT vehicle, an electric vehicle, and the like.

In the following description, when the transaxle 1 is mounted on the vehicle V, the width direction of the vehicle V may simply be referred to as the "width direction W".

As shown in FIGS. 1 and 2, the transaxle 1 includes a first electric motor 20 (electric motor), a second electric motor 30 (electric motor), a differential mechanism 32, and a transaxle housing 40 (case body). The transaxle housing 40 is a container for housing the first electric motor 20, the second electric motor 30, and the like. In the following description, the first electric motor 20 (MG1) and the second electric motor 30 (MG2) may be generically referred to simply as "electric motor 18".

As shown in FIG. 3, the transaxle 1 is provided with an input shaft 12 that rotates when power is transmitted from an engine (not shown). The input shaft 12 is formed to extend along the width direction W. As shown in FIG. In other words, the axis La of the input shaft 12 is arranged along the width direction W of the vehicle.

A gear portion 14 is formed on the input shaft 12 so as to protrude outward from the outer peripheral surface. The gear portion 14 meshes with the generator gear 28 of the first electric motor 20 . Therefore, the power transmitted to the gear portion 14 is transmitted to the generator gear 28 . A generator gear 28 is formed on the MG1 shaft 26 .

A first bearing 16 a and a second bearing 16 b are arranged at positions adjacent to the gear portion 14 of the input shaft 12 . The first bearing 16a and the second bearing 16b are arranged so as to be adjacent to the gear portion 14 on one side and the other side of the input shaft 12 in the direction of the axis La (at a predetermined interval).

The first bearing 16a is arranged on the oil pump 50 side, which will be described later, with respect to the gear portion 14 . The first bearing 16a rotatably supports the input shaft 12 with respect to an oil pump cover 52, which will be described later. The second bearing 16b is arranged on the opposite side (engine side) of the gear portion 14 from the oil pump 50 . The second bearing 16 b supports the input shaft 12 rotatably with respect to the transaxle housing 40 . Also, the outer diameter of the first bearing 16a is larger than the outer diameter of the second bearing 16b.

A central portion of the end portion 12a of the input shaft 12 on the oil pump 50 side is formed in a recessed shape (recess) that is recessed toward the engine side. Further, the recessed shape of the end portion 12a of the input shaft 12 is formed in a square shape in a cross-sectional view.

An input shaft center oil passage 12 b through which oil supplied from the oil pump 50 flows is provided at the center of the input shaft 12 . Further, an oil passage 12c extending in a direction perpendicular to the axial oil passage 12b communicates with the axial oil passage 12b. The oil passage 12 c is provided on the engine side with respect to the gear portion 14 . A second bearing 16b is arranged between the oil passage 12c and the gear portion 14 .

An oil pump 50 is provided on the side of the input shaft 12 opposite to the engine side. The oil pump 50 has a discharge port 50b for discharging oil. An oil pump cover 52 is attached to the oil pump 50 .

The oil pump 50 is operated by power input through an oil pump shaft 54, which will be described later. Thereby, the oil pump 50 can pressure-feed the oil stored in the oil storage portion (not shown) to each part. For example, the oil pump 50 pumps oil to the first electric motor 20 and the second electric motor 30 to cool the first electric motor 20 and the second electric motor 30 .

The pump gear 50a of the oil pump 50 rotates as the input shaft 12 and the oil pump shaft 54 are rotationally driven to pump the oil. Further, as described above, the first electric motor 20 is driven by the rotational power transmitted by the driving of the engine, so the oil pump 50 operates in conjunction with the first electric motor 20 by driving the engine.

A pump gear 50a of the oil pump 50 is held on the oil pump shaft 54 so as not to rotate relative to it. The oil pump shaft 54 is configured separately from the input shaft 12 . Also, the oil pump shaft 54 and the input shaft 12 are arranged on the coaxial line La. In addition, the oil pump shaft 54 is integrally rotatable by receiving power input through the input shaft 12 .

The oil pump shaft 54 is provided with a metal first bush 56 a and a metal second bush 56 b that rotatably support the oil pump cover 52 . The first bushing 56 a is arranged on the input shaft 12 side with respect to the oil pump 50 . The second bush 56b is arranged on the side opposite to the input shaft 12 with respect to the oil pump 50 .

The first bushing 56a is provided with an orifice 57 for flowing oil. The diameter of the orifice 57 is appropriately set according to the oil flow rate. The first bushing 56a is arranged adjacent to the first bearing 16a along the axis La direction. The first bushing 56a, the second bushing 56b, and the first bearing 16a are fixed to the oil pump cover 52, respectively. Also, the outer diameters of the first bushing 56a and the second bushing 56b are smaller than the outer diameters of the first bearing 16a and the second bearing 16b.

A central portion of an end portion 54a of the oil pump shaft 54 on the input shaft 12 side is formed in a shape (convex portion) protruding toward the engine side. Further, the end portion 54a of the oil pump shaft 54 is formed in a square shape in a cross-sectional view. The end portion 54a of the oil pump shaft 54 is coupled to the end portion 12a of the input shaft 12 at a coupling portion E so that they can rotate integrally. As described above, the input shaft 12 and the oil pump shaft 54 are connected by a so-called square fit. A connecting portion E between the input shaft 12 and the oil pump shaft 54 is located on the inner peripheral portion of the first bearing 16a with respect to the direction of the axis line La.

In general, the force F applied to the gear portion 14 of the input shaft 12 may tilt the axis (axis La) of the input shaft 12 . Therefore, in the present embodiment, at the connecting portion E between the oil pump shaft 54 and the input shaft 12, the inclination of the axis (axis La) of the input shaft 12 is allowed with respect to the axis (axis La) of the oil pump shaft 54. are combined so that In other words, the input shaft 12 and the oil pump shaft 54 are connected at the connecting portion E such that a small relative movement between the shafts is allowed (reduced). This suppresses direct transmission of the inclination of the axis (axis La) of the input shaft 12 to the axis (axis La) of the oil pump shaft 54 .

An axial center of the oil pump shaft 54 is provided with an oil pump axial center oil passage 54b for flowing oil. The oil pump shaft center oil passage 54b communicates with an oil passage 54c and an oil passage 54d extending in a direction orthogonal to the oil pump shaft center oil passage 54b. The oil passage 54 d communicates with the orifice 57 of the bush 56 . An oil passage 52 a is formed in the oil pump cover 52 . The oil passage 52 a connects the discharge port 50 b of the oil pump 50 and the orifice 57 of the first bush 56 .

Here, the flow of oil will be explained. First, the power of the engine is transmitted to the pump gear 50 a of the oil pump 50 via the input shaft 12 and the oil pump shaft 54 . As a result, the oil is discharged from the discharge port 50b of the oil pump 50 by rotationally driving the pump gear 50a. The oil discharged from the discharge port 50b of the oil pump 50 flows through the oil passage 52a to the first bushing 56a. The oil flowing through the first bushing 56a flows to the first bearing 16a through the oil passage 52b, or flows through the orifice 57 of the first bushing 56 and the oil passage 54d to the oil pump shaft center oil passage 54b.

In addition, the oil flowing through the oil pump shaft center oil passage 54b flows to the second bush 56b via the end portion 54e of the oil pump shaft 54, or flows to the first bearing 16a via the oil passage 54c, or , into the input shaft center oil passage 12 b of the input shaft 12 . The oil flowing through the input shaft center oil passage 12b flows through the oil passage 12c to the second bearing 12c.

As shown in FIGS. 1 and 2, the first electric motor 20 (MG1) is a motor generator. A generator controller including an inverter and the like is connected to the first electric motor 20 . Although illustration is omitted, the generator controller is mounted on the transaxle 1 . The AC power output from the first electric motor 20 is converted into DC power by the generator controller, and the DC power is supplied to the battery to charge the battery. The first electric motor 20 is driven by the rotational power transmitted by the drive of the engine.

The first electric motor 20 and the second electric motor 30 each have a stator and a rotor having a rotor shaft. A generator gear 28 is provided on the rotor shaft 24 of the first electric motor 20 . The axis Lb of the first electric motor 20 is arranged along the width direction W of the vehicle V. As shown in FIG.

The first electric motor 20 is provided with a coil end chamber 25 in which the coil ends of the stator 21 are arranged. The coil end chamber 25 is provided so as to secure the distance between the partition wall portion 43 and the stator 21 (so as to secure the insulation distance).

The second electric motor 30 (MG2) consists of a motor generator. A motor controller including an inverter and the like is connected to the second electric motor 30 . Although illustration is omitted, the generator controller is mounted on the upper portion of the transaxle 1 . A battery is connected to the motor controller. The DC power output from the battery is supplied to the motor controller, the DC power is converted into AC power by the motor controller, and the AC power is supplied to the second electric motor 30, thereby driving the second electric motor 30. .

The differential mechanism 32 is configured to allow a differential between a pair of left and right drive shafts (not shown) that drive the left and right drive wheels, and to transmit rotational power to the pair of left and right drive shafts. . The differential mechanism 32 includes a plurality of gears including a differential ring gear 32a and a differential gear 32b.

The power of the second electric motor 30 is transmitted to the differential ring gear 32 a of the differential mechanism 32 via a plurality of gears, and then transmitted from the differential mechanism 32 to the driving wheels 2 . As a result, the drive wheels 2 rotate and the vehicle V runs.

According to the embodiment described above, the following effects (1) to (10) can be obtained.

(1) In the transaxle 1 according to the present embodiment, the oil pump shaft 54 and the input shaft 12 are joined at the joint E so that the inclination of the axial center of the input shaft 12 is allowed with respect to the oil pump shaft 54 . According to the above-described embodiment, when power is transmitted to the gear portion 14 of the input shaft 12, the reaction force applied to the gear portion 14 of the input shaft 12 causes the inclination of the axial center (axis line La) of the input shaft 12 to change the angle of the oil. Direct transmission to the pump shaft 54 can be mitigated. That is, even if the input shaft 12 is tilted, tilting of the axial center (axis line La) of the oil pump shaft 54 can be suppressed in the same manner as the input shaft 12 . As a result, the load on the first bushing 56a and the second bushing 56b of the oil pump shaft 54 is reduced, so seizure of the first bushing 56a and the second bushing 56b that support the oil pump shaft 54 can be prevented. Further, according to the above embodiment, by suppressing the inclination of the oil pump shaft 54, the reliability of the oil pump 50 can be improved.

(2) In the transaxle 1 according to the present embodiment, the oil discharged from the discharge port 50b of the oil pump 50 flows through at least the orifice 57 of the first bushing 56a into the oil pump shaft center oil passage 54b. Configured. According to the above embodiment, the oil discharged from the discharge port 50b of the oil pump 50 flows through the first bushing 56a into the oil pump shaft center oil passage 54b, so that sufficient oil is always supplied to the first bushing 56a. can supply. In addition, since the oil flows through the orifice 57 of the first bushing 56a, the amount of oil flowing from the first bushing 56a to the oil pump axial oil passage 54b can be easily adjusted by the diameter of the orifice 57. As a result, seizure of the first bushing 56a that supports the oil pump shaft 54 can be prevented.

(3) In the transaxle 1 according to the present embodiment, the first bearing 16a and the first bushing 56a are arranged adjacent to each other along the direction of the axis La. As a result, the distance between the first bearing 16a and the first bushing 56a is reduced, so that when the input shaft 12 is tilted, the axial deflection of the oil pump shaft 54 in the orthogonal direction is reduced. be able to. As a result, the load on the first bushing 56a of the oil pump shaft 54 can be reduced.

(4) In the transaxle 1 according to this embodiment, the first bearing 16 a and the first bush 56 a are fixed to the oil pump cover 52 . As a result, the oil pump cover 52 can have both the function of fixing the first bearing 16a and the function of fixing the first bushing 56a.

(5) In the transaxle 1 according to the present embodiment, the first bushing 56a and the second bushing 56b are positioned on the inner peripheral side of the discharge port 50b to make the transaxle housing (case body) 40 more compact (downsized). can do.

(6) In the transaxle 1 according to the present embodiment, the end portion 54a of the oil pump shaft 54 is formed as a protrusion, the end portion 12a of the input shaft 12 is formed as a recess, and the protrusion and recess are formed at the engaging portion E. engaged. As a result, the input shaft 12 and the oil pump shaft 54 can be easily rotatably coupled together simply by fitting the convex portion and the concave portion to each other.

(7) In the transaxle 1 according to the present embodiment, the protrusions and recesses are formed in a square shape when viewed in cross section. As a result, the input shaft 12 and the oil pump shaft 54 can be securely transmitted to the oil pump shaft 54 while facilitating the fitting work by so-called square fitting.

(8) In the transaxle 1 according to the present embodiment, the connecting portion E between the input shaft 12 and the oil pump shaft 54 is positioned inside the first bearing 16a with respect to the direction of the axis line La. As a result, the first bearing 16a can receive the vibration in the direction orthogonal to the axis at the coupling portion E between the input shaft 12 and the oil pump shaft 54 . Therefore, it is possible to suppress the vibration of the oil pump shaft 54 in the direction orthogonal to the axial center due to the inclination of the input shaft 12 .

(9) In the transaxle 1 according to the present embodiment, the oil flowing through the oil pump axial oil passage 54b flows to the first bearing 16a and flows through the input axial oil passage 12b to the second bearing 16b. designed to flow. As a result, the oil discharged from the discharge port 50b of the oil pump 50 can be sufficiently supplied to the first bearing 16a and the second bearing 16b.

(10) In the transaxle 1 according to the present embodiment, the oil discharged from the discharge port 50b of the oil pump 50 is supplied to the second bush 56b through the oil pump shaft center oil passage 54b. As a result, the oil discharged from the discharge port 50b of the oil pump 50 flows to the second bush 56b through the oil pump shaft center oil passage 54b, so that a sufficient amount of oil can be supplied to the second bush 56b. can be done.

The above embodiment can also be modified as follows.

In the above-described embodiment, an example is shown in which the first bearing and the first bushing are arranged adjacent to each other along the direction of the axis La, but the present invention is not limited to this. For example, the spacing between the first bearing and the first bushing may be appropriately set within a range in which the inclination of the input shaft can be effectively allowed at the coupling portion.

Although the first bearing, the first bush, and the second bush are fixed to the oil pump cover in the above embodiment, the present invention is not limited to this. For example, if it is possible to effectively allow the inclination of the input shaft at the coupling portion, it is preferable to make a design change such as fixing only the first bearing to the transaxle housing.

In the above embodiment, an example was shown in which the outer diameter of the bush is smaller than the outer diameter of the bearing, but the present invention is not limited to this. For example, if the tilt of the input shaft can be effectively accommodated at the joint, the outer diameter of the bushing can be the same as or larger than the outer diameter of the bearing.

In the above embodiment, an example in which the input shaft and the oil pump shaft are coupled by a so-called square fit was shown, but the present invention is not limited to this. For example, if it is possible to allow the inclination of the input shaft with respect to the oil pump shaft, it is preferable to form the ends of the shaft in a triangular or hexagonal shape and connect them.

In the above embodiment, an example was shown in which the end of the input shaft is formed as a recess and the end of the oil pump shaft is formed as a protrusion, but the present invention is not limited to this. For example, if it is possible to effectively allow the inclination of the input shaft at the connecting portion, it is preferable to form the end of the input shaft into a projection and the end of the oil pump shaft into a recess.

In the above-described embodiment, an example was shown in which the coupling portion between the input shaft and the oil pump shaft is located on the inner peripheral portion of the bearing with respect to the axial direction, but the present invention is not limited to this. For example, if it is possible to effectively allow the inclination of the input shaft at the connecting portion, the connecting portion between the input shaft and the oil pump shaft may be offset from the inner peripheral portion of the bearing in the axial direction.

In the above embodiment, an example is shown in which oil flows through the oil pump shaft center oil passage to the first bearing, but the present invention is not limited to this. For example, if it is possible to effectively lubricate the first bearing, the oil may be configured to flow to the first bearing via the oil pump axial oil passage and the input axial oil passage.

In the above embodiment, an example was shown in which the oil discharged from the discharge port of the oil pump is supplied to the second bushing through the oil pump shaft center oil passage, but the present invention is not limited to this. For example, if it is possible to effectively lubricate the second bushing, it is preferable to configure so that the oil discharged from the discharge port of the oil pump is directly supplied to the second bushing.

All of the above embodiments are examples of adaptations of the present invention, and any other embodiments within the scope of the claims are of course included in the technical scope of the invention.

1: transaxle 12: input shaft 12a: end (projection)
12b: Input shaft center oil passage 14: Gear portion 16a: First bearing 16b: Second bearing 40: Transaxle housing (case body)
50: Oil pump 50b: Discharge port 52: Oil pump cover 54: Oil pump shaft 54a: End (recess)
54b: oil pump shaft center oil passage 56a: first bushing 56b: second bushing 57: orifice E: coupling portion La: axis line

Claims (2)

an input shaft having a gear portion to which power is transmitted;
a bearing arranged in the axial direction of the input shaft with respect to the gear portion of the input shaft and supporting the input shaft rotatably with respect to a case body;
an oil pump shaft rotatable by receiving power input through the input shaft;
an oil pump operated by power input through the oil pump shaft;
a bush that rotatably supports the oil pump shaft with respect to the case body,
The oil pump shaft and the input shaft are arranged on the same axis as separate bodies, and are integrally rotatable by connecting the ends of the shafts to each other at a connecting portion,
A transaxle, wherein the oil pump shaft and the input shaft are coupled at the coupling portion such that an inclination of the input shaft is allowed with respect to the oil pump shaft. an input shaft having a gear portion to which power is transmitted;
a bearing arranged in the axial direction of the input shaft with respect to the gear portion of the input shaft and supporting the input shaft rotatably with respect to a case body;
an oil pump shaft that is rotatable by receiving power input through the input shaft and provided with an oil pump shaft center oil passage for flowing oil through the shaft center;
an oil pump operated by power input through the oil pump shaft and provided with a discharge port for discharging the oil;
a bush rotatably supporting the oil pump shaft with respect to the case body and provided with an orifice for flowing the oil,
The oil pump shaft and the input shaft are arranged on the same axis as separate bodies, and are integrally rotatable by connecting the ends of the shafts to each other at a connecting portion,
The transaxle according to claim 1, wherein the oil discharged from the discharge port of the oil pump flows through an orifice of the bush to the oil pump shaft center oil passage.

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