JPH05209674A - Power transmission device - Google Patents

Abstract

PURPOSE:To facilitate an oil exchange at the time of servicing by circulating oil while independently maintaining reference oil levels among chambers of a transmission, a transmitting mechanism, and a differential device having different reference oil levels. CONSTITUTION:Reference oil levels of chambers 46, 47 of a transmission 3, a transmitting mechanism 12, and a differential device 31 are set higher in the order of the differential device 31, transmission 3, and transmitting mechanism 12. Oil is sucked from the chamber 47 of the differential device 31 by the action of an oil pump 74, and it is fed to the chamber of the transmitting mechanism 12 through an oil feed passage 73. When the oil in the chamber of the transmitting mechanism 12 becomes the reference oil level, the oil naturally flows down to the chamber 46 of the transmission 3 through a drain passage. When the oil in the chamber 46 of the transmission 3 becomes the reference oil level, the oil naturally flows down to the chamber 47 of the differential device 31 through a drain passage 106.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for a vehicle in which an engine and a transmission are mounted in parallel and horizontally, and more particularly to a lubricating structure for the transmission and the like.

[0002]

2. Description of the Related Art Conventionally, in a vehicle such as a four-wheel drive vehicle or an FF (front engine / front drive) type vehicle, when arranging an engine and a transmission in an engine room in the front of the vehicle body, these are installed vertically. There are various modes depending on whether the device is mounted horizontally or horizontally. Of these, especially
When both the engine and the transmission are horizontally arranged, if both of them are arranged in series, there is a problem that the axial length of the entire power train becomes considerably long. For this reason, as a power transmission device, for example, as disclosed in Japanese Patent Laid-Open No. 1-316561, a transmission is arranged in parallel behind an engine, and both of them can transmit power by a transmission mechanism such as a gear or a chain. A differential that transmits the power from the transmission to the left and right drive shafts on the same shaft as the transmission while the clutch is arranged between the engine and the transmission mechanism on the axis of the crankshaft of the engine. A device provided with a device has been developed and put into practical use.

Further, in this type of power transmission device,
In order to reduce the size and weight of the device, the case of the engine, transmission, differential, etc. is integrally molded, and the layout is set so that the distance between the shafts of these is shortened as much as possible. ..

[0004]

However, in the case of such an arrangement setting, the reference oil levels of the chambers of the engine, the transmission, the differential device and the transmission mechanism are different from each other in the vertical direction. In order to deal with this, if the structure is adopted in which oil is supplied to the lubrication points independently in each room, there is a problem in that it takes time and effort to replace oil during service, and serviceability deteriorates.

The present invention has been made in view of the above points, and an object of the present invention is, in particular, between the reference oil levels of the transmission, the transmission mechanism, and the differential gears. By recirculating oil while maintaining the level independently, it is possible to facilitate oil exchange during service and provide a power transmission device that can improve serviceability.

[0006]

In order to achieve the above object, the invention according to claim 1 is a power transmission device in which an engine is arranged horizontally with its crankshaft oriented in the vehicle width direction, and A transmission is arranged in parallel behind the engine, a clutch is provided at one end of a crankshaft of the engine, and engine power output through the clutch is provided on a side of the clutch opposite to the engine. While a transmission mechanism for transmitting to the transmission is provided, a differential device for transmitting power from the transmission to the left and right drive shafts is provided on a shaft separate from the transmission. Each room of the mechanism and differential is
It is assumed that the reference oil levels are set differently at the top and bottom. In such a power transmission device, among the three chambers of the transmission, the transmission mechanism, and the differential device, an oil supply passage that supplies oil across at least two chambers, and an intermediate portion of the oil supply passage An oil pump provided and a drain passage for allowing the oil to naturally flow from a chamber having a higher reference oil level to a chamber having a lower reference oil level among the chambers of the transmission, the transmission mechanism, and the differential gear.

The invention according to claim 2 shows one aspect of the invention according to claim 1. That is, the reference oil levels of the three chambers of the transmission, the transmission mechanism, and the differential device are higher in the order of the differential device, the transmission, and the transmission mechanism, and the oil supply passage is located from the chamber of the differential device. The oil is supplied to the transmission mechanism chamber through the transmission chamber.

The invention according to claim 3 is dependent on the invention according to claim 2, wherein the oil pump is transmitted from the shaft of the transmission from the viewpoints of rotation stability and assembling performance. It is provided at the end opposite to the mechanism.

A fourth aspect of the invention is dependent on the second aspect of the invention, wherein the transmission mechanism is a churn type in which a chain is wound between two sprockets. In the case of the transmission mechanism, a rib is formed that extends across the two sprockets and promotes the drip of the oil scraped up by one of the sprockets.

The invention according to claim 5 is dependent on the invention according to claim 2, and more specifically shows the oil supply passage. That is, in the room of the transmission, the passage is formed in the shaft of the transmission, and in the room of the differential device, the strainer pipe is connected to the strainer.

The invention according to claim 6 is dependent on the invention according to claim 2, wherein in the chamber of the differential device, the strainer is arranged on the differential device side by the operation of the differential device. A partition wall that restricts the oil from flowing is formed.

The invention according to claim 7 is dependent on the invention according to claim 6, wherein a gear of a speedometer is provided in the vicinity of the partition wall, and rotation of the gear causes the differential device to be disposed from the side where the differential device is arranged. The oil is made to flow to the side where the strainer is arranged.

The invention according to claim 8 is dependent on the invention according to claim 5, wherein the strainer pipe is
It is configured to be attached to the reverse idle gear support member midway.

[0014]

With the above construction, in the invention according to claim 1,
When the engine power is transmitted to the transmission side,
Of the three chambers of the transmission mechanism and the differential gear, oil is supplied from the chamber with the lower reference oil level to the chamber with the higher reference oil level through the oil supply passage by the operation of the oil pump, and the interior of the chamber is lubricated. Used for lubrication of parts. Further, when the oil in the chamber reaches the reference oil level of the chamber or more, the oil naturally flows down to the chamber having the lower reference oil level through the drain passage, and is used for lubrication of the lubrication point in the chamber.

On the other hand, at the time of the servicing, it is not necessary to individually inject new oil into each chamber of the transmission, the transmission mechanism, and the differential device, and it is possible to inject the oil into the chamber having the lowest oil level. The oil is circulated to inject oil into other chambers.

[0016]

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

1 to 4 show a power transmission device for a vehicle according to an embodiment of the present invention. This power transmission device is mounted as an FF type vehicle in an engine room at the front of a vehicle body and has left and right front wheels. It is driven.

1 to 3, reference numeral 1 is a four-cylinder reciprocating engine, and the engine 1 is
The crankshaft 2 is arranged horizontally with the widthwise direction of the vehicle. Reference numeral 3 denotes a transmission that is disposed horizontally behind the engine 1 and in parallel with the crankshaft 2.

Further, 11 is a clutch provided at one end of the crankshaft 2 of the engine 1, and 12 is power of the engine 1 (rotational force of the crankshaft 2) output through the clutch 11 of the transmission 3. A churn-type transmission mechanism for transmitting to an input shaft 21, said transmission mechanism 1
2 is a clutch disc 5 of the clutch 11 which will be described later.
Drive sprocket 16 that is connected to 2 for rotation
And a driven sprocket 17 rotatably and integrally provided on the input shaft 21 of the transmission 3, and both the sprockets 16 and 1 described above.
It is composed of a chain 18 wound between seven.

The transmission 3 has an input shaft 21 and an output shaft 22 located on the coaxial line, and a counter shaft 23 parallel to these. The input shaft 21 and the counter shaft 23 are drivingly connected via a pair of reduction gears 24, while a gear train 25 for shifting is arranged between the output shaft 22 and the counter shaft 23. .. Thus, the engine power input to the input shaft 21 is transmitted from the input shaft 21 to the counter shaft 23 via the reduction gear 24, and the counter shaft 23 transmits the gear train 2 for shifting.
It is transmitted to the output shaft 22 via any one gear of No. 5 and is appropriately decelerated during this period.

An output gear 26 is rotatably provided at an end of the output shaft 22 of the transmission 3, and the output gear 26 is rotatably provided in a differential case of the differential gear 31.
It meshes with 7. Then, the power output from the output shaft 22 of the transmission 3 is transmitted to the differential device 31 and divided into left and right by the differential device 31, and then the left and right front wheels are respectively passed through the drive shafts 32L and 32R. (Not shown).

As shown in FIG. 4, the engine 1 is arranged horizontally with its cylinder axis tilted rearward of the vehicle body. The case 40 of the engine 1 includes a head cover 41, a cylinder head 42, an upper crankcase 43, a lower crankcase 44, and an oil pan 45 from the upper side.
The mating surface F between the upper crankcase 43 and the lower crankcase 44 is provided in a plane that passes through the axis of the crankshaft 2 and is substantially orthogonal to the cylinder axis. The transmission 3 is housed in the upper crankcase 43 of the engine 1 and its input / output shafts 21, 2 are
2 is located in front of the counter shaft 23, and a reverse idle gear 28 is arranged below the counter shaft 23.

The drive shaft 32R is provided below the transmission 3 on the mating surface F, and the differential device 31 located coaxially with the drive shaft 32R has an upper crankcase 43. It is stored so as to straddle the inside and the inside of the lower crankcase 44. As described above, the engine 1, the transmission 3, and the differential device 31 are integrally molded while the chambers (that is, the engine chamber, the transmission chamber 46, and the differential chamber 47) are partitioned so as to have independent reference oil levels. It has a special structure.

On the other hand, the clutch 11 is shown in FIGS.
As shown in FIG. 5, a support disc 51 that is connected to the crankshaft 2 so as to rotate integrally with the crankshaft 2, and the support disc 51
, A pressure plate 53 for pressing the clutch disc 52 against the support disc 51, and the pressure plate 53 in the connecting direction of the clutch 11 (that is, the clutch disc 52 to the support disc 51). Belleville spring 54 that is constantly urged in a direction in which it is pressed to transmit power, and the pressure plate 53 that resists the urging force of the disc spring 54.
To a direction in which the clutch 11 is disengaged (that is, a direction in which the clutch disc 52 is separated from the support disc 51 to shut off power transmission). Further, the clutch 11 is provided with a clutch case 56 that covers the clutch body such as the support disk 51 and the like, and the clutch case 56 is separate from the case 40 such as the engine 1 and the like. A chain cover 57 that covers the sprockets 16 and 17 of the transmission mechanism 12 and the chain 18 together with the clutch case 56 is attached to the side of the.

Each sprocket 16 of the transmission mechanism 12,
17 are rotatably supported by the clutch case 56 via bearings 58, and the drive sprocket 16 is rotatably connected to the clutch disc 52 via a shaft 59 integrally formed therewith, The driven sprocket 17 includes an input shaft 2 of the transmission 3 which extends through the clutch case 56.
One end of 1 is rotatably connected by spline connection. The clutch case 56 is provided with a cylindrical collar portion 60 protruding from the bearing portion (a portion supporting the bearing 58) so as to cover the outer periphery of the shaft 59, and the disc spring is provided on the collar portion 60. A central portion of 54 is axially slidably supported via a release bearing 61.

The release fork 55 is of a lever type whose central portion is supported by a pivot pin 62, one end of which is engaged with the central portion of the disc spring 54, and the other end of which is from inside the clutch case 56. It is extended to the outside on the side opposite to the transmission 3 with the crankshaft 8 interposed therebetween, and the extended portion is connected to an operation mechanism portion (not shown). The pivot pin 60 is erected on the clutch case 56.

The left and right drive shafts 32 are also provided.
Of the L and 32R, the drive shaft 32R that transmits power to the front wheel on the right side of the vehicle body, which is separated from the differential device 31, has a joint portion 66 formed of a universal joint at the rear position of the clutch 11 or the clutch case 56. The length of the drive shaft 32R from the joint portion 66 to the front wheel is equal to that of the drive shaft 32 on the left side of the vehicle body.
The length from the joint portion 67 provided in the region close to the differential device 31 of L to the front wheel is set to be substantially equal to the length. The differential chamber 47 housing the differential device 31 is extended from the differential device 31 side to the vicinity of the joint portion 66 of the drive shaft 32R while covering the outer periphery of the drive shaft 32R.

Next, the lubricating oil circulation structure for each chamber of the transmission 3, the transmission mechanism 12 and the differential device 31, that is, the transmission chamber 46, the chain chamber 71 and the differential chamber 47 will be described.

The standard oil levels of the three chambers are the lowest in the differential chamber 47, the transmission chamber 46 and the chain chamber 71.
It is set higher in the order of. A strainer 72 is arranged in the differential chamber 47, and oil collected at the bottom of the differential chamber 47 is sucked into the oil supply passage 73 from the strainer 72 and passed through the oil supply passage 73 to the mission chamber 4
Oil is supplied to the chain chamber 71 via 6 and an oil pump 74 is provided in the middle of the oil supply passage 73.

As shown in FIG. 5, a partition wall 76 for partitioning the differential device 31 side and the strainer 72 side is integrally formed with the lower crankcase 44 in the differential chamber 47. The partition wall 76 has a communication port 77 above the reference oil line of the differential chamber 47.
While the same reference oil line is secured on both the disposition side of the differential gear 31 and the disposition side of the strainer 72 in FIG. 7, the rotation of the differential gear 31 causes the strainer 72 to move to the disposition side of the differential gear 31. It regulates the flow of oil. A speedometer gear 78 is provided near the partition wall 76. The gear 78 is rotatably driven by a drive gear 79 which rotates integrally with the differential gear 31, and the rotation of the gear 78 causes oil from the arrangement side of the differential gear 31 to communicate with the communication port 7 of the partition wall 76.
The strainer 72 is fed through 7 to the side where the strainer 72 is arranged.

The oil supply passage 73 is constituted by a strainer pipe 81 whose one end is connected to the strainer 72 in the differential chamber 47, and is axially connected to the input / output shafts 21, 22 of the transmission 3 in the transmission chamber 46. It is constituted by a passage 82 formed along. As shown in FIG. 4, the strainer pipe 81 is arranged so as to bypass the drive shaft 32R in consideration of the assembly of the engine case 40 (specifically, the assembly of the lower crankcase 44 with respect to the upper crankcase 43). On the other hand, in the middle of the strainer pipe 81, as shown in FIG. 6, when the reverse idle gear support member 83 that supports the reverse idle gear 28 is fixed to the mounting portion 84 of the upper crankcase 43, the support member 83 is provided. Are fastened together by a clip member 85. The mounting part 8
4 is provided in the vicinity of a bearing portion 87 that rotatably supports the differential device 31 via a bearing 86.

The oil pump 74 is provided at the end of the output shaft 22 of the transmission 3 where the output gear 26 is attached.
The oil pump 74 is, as shown in enlarged detail in FIGS. 7 and 8, a pump housing 91 attached to the engine case 40 and a pump housing 91 that is slidably fitted in the pump housing 91 in the axial direction thereof. A side member 93 that forms a pump chamber 92 between the side member 93 and a side member 93, and a biasing member 94 that is a leaf spring that biases the side member 93 to the inner side of the pump housing 91 (that is, the direction in which it abuts against the abutment surface 91a). A large gear 95 having inward trochoidal teeth fixed in the pump chamber 92, and the pump chamber 9
2 is provided with a pinion gear 96 as a rotor having trochoidal teeth facing outwardly rotatably arranged. The small gear 96 is rotatably connected to an intermediate shaft 97 penetrating the side member 93, and the intermediate shaft 97 is spline-coupled to the output shaft 22 as shown in FIG.
The spline hole 98 of 6 is spline-coupled so as to be slidable in the axial direction and integrally with the rotation, and receives the power from the output shaft 22 via the output gear 26. 97 and the pinion 96 are the output shaft 2
It rotates together with 2. Due to the change in volume between the small gear 96 and the large gear 95 due to the rotation of the small gear 96, oil is sucked from the suction passage 99 communicating with the strainer pipe 81, and the oil is formed on the intermediate shaft 97. The discharge passage 100 is configured to discharge to the passage 82 of the output shaft 22.

The side member 93 is the biasing member 94.
The contact surface 91a of the pump housing 91 by receiving the urging force of
When the oil pressure in the pump chamber 92 exceeds a predetermined value, the pump chamber 92 is sealed in an oil-tight manner in the state of contact with the contact surface 91a against the contact surface 91a against the urging force of the urging member 94. The hydraulic pressure in the pump chamber 92 is relieved through a gap between the outer peripheral surface of the side member 93 and the inner peripheral surface of the pump housing 91 at a position separated from the inner peripheral surface of the pump housing 91. Therefore, the side member 93 and the biasing member 94 form a relief mechanism 101 for keeping the hydraulic pressure in the pump chamber 92 at a constant pressure. Also,
The side member 93 is rotatable relative to the intermediate shaft 97, but is engaged so as to move integrally in the axial direction. Therefore, when the side member 93 is relief-moved in the axial direction, the side member 93 moves integrally with the intermediate shaft 97 while being guided by the groove of the spline hole 98 of the output gear 26 that is spline-coupled with the intermediate shaft 97.

On the other hand, in the clutch case 56 constituting the chain chamber 71, as shown in FIG. 2, when the oil level in the churn chamber 71 becomes higher than the reference oil level, the oil in the churn chamber 71 is filled with oil. Mission room 46
A drain passage 102 is formed so as to naturally flow to the side, and as shown in FIG. 9, the drain passage 102 straddles between two boss portions 103 and 104 that respectively support the drive sprocket 16 and the driven sprocket 17 of the transmission mechanism 12. A rib 105 that extends and extends to drip the oil scraped up by the driven sprocket 17 is formed. Further, as shown in FIG. 3, in a portion of the case 40 which separates the mission chamber 46 from the differential chamber 47, when the oil level of the mission chamber 46 becomes higher than the reference oil level, the inside of the mission chamber 46 is A drain passage 106 is formed to allow the oil to naturally flow down to the differential chamber 47.

In FIG. 4 and FIG. 5, 111 is the engine 1.
An air supply pipe arranged on the front side of the engine 1, and an exhaust pipe 112 arranged on the rear side of the engine 1.

Next, the operation and effect of the oil circulation structure of the above embodiment will be described. When the power of the engine 1 is transmitted to the transmission 3, the output shaft 22 of the transmission 3 rotates. The oil pump 74 operates. By the operation of the oil pump 74, the mission chamber 46, the differential chamber 4
7 and the chain chamber 71, oil is sucked through the strainer pipe 81 from the diff chamber 47 having the lowest reference oil level, passes through the oil pump 74, and then the passage 82 of the input / output shafts 21, 22 of the transmission 3. Is supplied to the chain chamber 71 having the highest reference oil level. When the oil in the chain chamber 71 becomes equal to or higher than the reference oil level of the chain chamber 71, the oil naturally flows down to the mission chamber 46 having a low reference oil level through the drain passage 102. Further, when the oil in the mission chamber 46 becomes equal to or higher than the reference oil level of the mission chamber 46, the oil naturally flows down to the differential chamber 47 having a low reference oil level through the drain passage 106. Therefore, the above three chambers 46, 4
Since Nos. 7 and 71 are maintained at the reference oil level, oil lubrication can be appropriately performed on the lubrication points of each chamber without excess or deficiency.

On the other hand, when the oil is changed at the time of serving, it is necessary to drain the oil accumulated in each of the mission chamber 46, the differential chamber 47 and the chain chamber 71, but a new oil is separately collected in each chamber. It is not necessary to inject the oil into the differential chamber 47, and if the oil is injected into the differential chamber 47, the oil is also injected into the chain chamber 71 and the mission chamber 46 by the above-described oil circulation. Can be improved.

Moreover, in the above-described embodiment, the oil pump 74 is placed at a position on the opposite side of the transmission mechanism 12 of the output shaft 22 of the transmission 3 (that is, at a position where the rotation is stable and does not interfere with other members). Since it is provided on the output gear 26 side end portion, the rotation of the oil pump 74 and thus the oil supply can be stabilized, and the assembling property can be improved. Further, since the rib 105 formed in the chain chamber 71 can promote the dripping of the oil scattered by the lifted sprocket 17 in the chain chamber 71, the reference level of the oil in the chain chamber 71 and the like can be reliably maintained. Can be done.

Further, in the differential chamber 47, the partition wall 76 can restrict the oil from flowing from the disposing side of the strainer 72 to the disposing side of the differential gear 31 as the differential gear 31 rotates. Therefore, the suction of the oil from the strainer 72 and the oil circulation can be smoothly performed. Moreover, the rotation of the gear 78 of the speedometer provided in the vicinity of the partition wall 76 allows the oil to flow from the side where the differential device 31 is arranged to the side where the strainer 72 is arranged, so that this effect can be further enhanced. it can.

In addition, since the strainer pipe 81 is attached to the reverse idle gear support member 83 on the way, the support rigidity of the strainer pipe 81 can be increased.

The present invention is not limited to the above embodiment, but includes various other modifications. For example, in the above-described embodiment, the case where the reference oil levels of the mission chamber 46, the differential chamber 47, and the chain chamber 71 increase in the order of the differential chamber 47, the mission chamber 46, and the chain chamber 71 has been described. Can be similarly applied to the case where the reference oil levels are different from each other in the other order. In some cases, the oil may be circulated only between two of the three chambers.

[0042]

As described above, according to the power transmission device of the present invention, the oil can be circulated between the chambers of the transmission, the transmission mechanism and the differential device while maintaining the reference oil level. Therefore, it is possible to properly perform oil lubrication on the lubrication points in each room, and to easily perform oil exchange during serving, thereby improving the serving property.

In particular, according to the third aspect of the invention, the oil pump is provided at the end opposite to the transmission mechanism of the transmission shaft, at a position where the rotation is stable and does not interfere with other members. The rotation of the oil pump and thus the oil supply can be stabilized, and the assembling property can be improved.

Further, according to the invention described in claim 4, since the ribs formed on the case of the chain type transmission mechanism can promote the drip of the oil scattered in the chamber, the reference oil level in each chamber can be maintained. It also has an effect that can be surely performed.

According to the sixth aspect of the invention, the partition wall formed in the chamber of the differential gear prevents the oil from flowing from the strainer arrangement side to the differential gear arrangement side as the differential gear operates. Since it can be regulated, it also has an effect that the oil can be smoothly sucked from the strainer, and thus the oil circulation can be smoothly performed. Further, this effect is remarkable when the oil is caused to flow from the arrangement side of the differential gear to the arrangement side of the strainer by the rotation of the gear of the speedometer provided in the vicinity of the partition wall, as in the invention described in claim 7. It will be

Further, according to the invention described in claim 8, there is also an effect that the support rigidity can be increased by attaching the strainer pipe to the reverse idle gear support member in the middle thereof.

[Brief description of drawings]

FIG. 1 is a skeleton diagram showing an overall schematic configuration of a power transmission device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration near a clutch portion of the power transmission device.

FIG. 3 is a cross-sectional view showing a configuration around a transmission and a differential device of the power transmission device.

FIG. 4 is a side view of the power transmission device seen through a partial cut along the line AA of FIG.

FIG. 5 is a side view of the power transmission device seen through a partial cut along the line BB of FIG.

FIG. 6 is an exploded perspective view of the reverse idle gear support member in the vicinity of a mounting point.

FIG. 7 is a vertical sectional side view of the oil pump.

FIG. 8 is a side view of the same.

FIG. 9 is a side view of the clutch case as seen from the mating surface side with the chain cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 engine 2 crankshaft 3 transmission 11 clutch 12 transmission mechanism 31 differential device 46 transmission chamber (transmission chamber) 47 differential chamber (differential chamber) 71 chain chamber (transmission chamber) 72 strainer 73 oil supply Passage 74 Oil pump 76 Partition wall 78 Speedometer gear 81 Strainer pipe 82 Passage 83 Reverse idle gear support member 102, 106 Drain passage 105 Rib

Claims (8)

[Claims] 1. An engine is horizontally arranged with its crankshaft oriented in the vehicle width direction, and a transmission is arranged in parallel behind the engine, and one end of the crankshaft of the engine is provided. A clutch is provided, and a transmission mechanism for transmitting the engine power output through the clutch to the transmission is provided on the side opposite to the engine of the clutch, while the transmission is provided on a shaft separate from the transmission. A differential device for transmitting power from the machine to the left and right drive shafts is provided, and the reference oil level is different for each chamber of the transmission, the transmission mechanism and the differential device. In the transmission device, an oil supply passage that supplies oil across at least two chambers among the three chambers of the transmission, the transmission mechanism, and the differential device; An oil pump provided therein, and a drain passage for allowing oil to naturally flow from a chamber having a high reference oil level to a chamber having a low reference oil level among the chambers of the transmission, the transmission mechanism, and the differential gear. Power transmission device. 2. The transmission, the transmission mechanism, and the differential device 3.
The reference oil level of the chamber increases in the order of the differential gear, the transmission, and the transmission mechanism. The oil supply passage supplies oil from the differential gear chamber to the transmission mechanism chamber through the transmission chamber. The power transmission device according to claim 1, wherein the power transmission device is provided as follows. 3. The oil pump is provided at the end of the transmission shaft opposite to the transmission mechanism.
The power transmission device described. 4. The transmission mechanism is a churn type in which a chain is wound between two sprockets,
The power transmission device according to claim 2, wherein the case of the transmission mechanism is formed with a rib extending across the two sprockets and promoting drip of the oil scraped up by one of the sprockets. 5. The oil supply passage is formed by a passage formed in a shaft of the transmission in the interior of the transmission, and is formed by a strainer pipe connected to a strainer in the interior of the differential gear. 2. The power transmission device according to 2. 6. A partition wall is formed in the differential chamber so as to restrict the flow of oil from the strainer arrangement side to the differential arrangement side by the operation of the differential device. The power transmission device described. 7. A gear of a speedometer is provided in the vicinity of the partition wall, and rotation of the gear causes the oil to flow from the arrangement side of the differential gear to the arrangement side of the strainer. Power transmission device. 8. The power transmission device according to claim 5, wherein the strainer pipe is attached by a reverse idle gear support member midway.