JPH0389061A - Chain chamber lubricating device for four-wheel driving transfer - Google Patents

Abstract

PURPOSE:To unnecessitate the disposition of a separate oil pump and the like by guiding lubricating oil fed through an oil passage to an engaged part between a driven sprocket and a chain by a wall body and removing debris by a magnetic body disposed in such a way as to cover a lubricating oil supply port located above the wall body. CONSTITUTION:A chain chamber 75 for enveloping a drive sprocket 31, a driven sprocket 33 and a chain 30 is provided with an oil passage 106, opened to the side, for feeding lubricating oil into the chamber 75, and the lubricating oil fed through the oil passage 106 is guided along a wall body 110 to the engaged part 111 between the sprocket 33 and the chain 30 and carried upward by the chain 30 to lubricate the whole chain mechanism. As an lubricating oil supply part located above the wall body 110 is covered by a magnetic body 114 disposed above, the lubricating oil after having lubricated the inside of the chain chamber 75 falls onto the magnetic body without being mixed with lubricating oil fed from the oil passage 106 and flowing down through the lubricating oil supply party and debris mixed in the lubricating oil is removed.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a four-wheel drive vehicle that connects a transfer to an automatic transmission and transmits torque distributed by the transfer to front wheels or rear wheels via a chain. This invention relates to a transfer chain chamber lubrication device.

(Prior Art) Conventionally, in a four-wheel drive vehicle, torque generated by an engine is transmitted to an automatic transmission via a fluid transmission device, and after being changed by the automatic transmission, it is transmitted to a four-wheel drive transfer. , to drive each drive wheel.

The above-mentioned automatic transmission and four-wheel drive transfer have various rotating members such as planetary gears, multi-disc clutches, multi-disc brakes, and one-way francs, and lubricating oil is supplied to these rotating members. There is. The lubricating oil used is the same lubricating oil that lubricates elements such as the engine, and when the oil pump is driven, the oil in the oil pan is sucked through the strainer and distributed as lubricating oil to each rotating member. Supplied.

However, when a chain mechanism is used to transmit the torque distributed by the transfer to the front or rear wheels, the amount of chips generated from the chain and sprocket during use is higher than that of a transfer system or a transfer system. Because of the large number of lubrication systems, a chain chamber for accommodating and isolating the chain is set up independently from the rest of the lubrication system.

Then, by rotating the driven sprocket while immersed in the oil pool, the lubricating oil is scooped up and the chain mechanism is lubricated.

(Problem to be Solved by the Invention) However, in the conventional four-wheel drive transfer chain chamber lubrication device described above, lubrication is performed by the above-mentioned raking operation, which not only generates heat due to the raking operation. , it is difficult to supply sufficient lubricating oil to the drive side.

Therefore, in order to suppress heat generation and supply sufficient lubricating oil, it is necessary to provide a separate oil pump and an oil cooler to radiate the heat of the lubricating oil to the outside.

This not only requires a space to install the viscous oil pump, oil cooler, etc., but also requires work for installation, increasing costs.

Therefore, a technique has been proposed in which the lubricating oil in the chain chamber is shared with other lubrication systems, thereby making the oil pump and oil cooler common (Utility Model Publication No. 63-5196).
1, and Japanese Patent Application Laid-Open No. 63-82830).

That is, lubricating oil for lubricating the chain chamber is supplied through a passage formed in the transfer input shaft and an oil passage extending radially from the passage to the drive sprocket.

However, in the conventional chain chamber lubrication structure described above,
Foreign matter such as chips mixed in the lubricating oil after lubricating the chain chamber may be collected together with the lubricating oil and sent to the transmission system and transfer system, and each rotating element may be damaged by the foreign matter. This may accelerate wear and reduce service life.

An object of the present invention is to solve the problems of the conventional four-wheel drive transfer chain chamber lubrication device, eliminate the need for a separate oil pump, oil cooler, etc., and eliminate foreign substances mixed in the lubricating oil. It is an object of the present invention to provide a chain chamber lubrication device for a four-wheel drive transfer that can efficiently remove chain chambers.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a drive sprocket (31) that engages with the transfer input shaft (12) to drive rotation, and a drive sprocket that engages with the output shaft. A chain mechanism (30') is formed by a driven sprocket (33) that transmits the rotation of the drive sprocket (31), and a chain (30) installed between the drive sprocket (31) and the driven sprocket (33). There is.

The chain chamber (75) surrounding the drive sprocket (31), driven sprocket (33), and chain (30) has an oil B (106) that opens laterally and supplies lubricating oil into the chain chamber (75). ) is provided.

The lubricating oil supplied via the core oil passage (106) is supplied to the wall (
A magnetic body (114) is guided to the meshing part (111) of the driven sprocket (33) and the chain (30) by a magnetic body (110) and is disposed above so as to cover the lubricating oil supply part on the wall (110). ) to remove foreign matter.

(Operations and Effects of the Invention) According to the present invention, the drive sprocket (31) engages with the transfer input shaft (12) and drives the rotation as described above, and the drive sprocket (31) engages with the output shaft and drives the drive sprocket (31). A chain mechanism (30') is formed by a driven sprocket (33) that transmits rotation of the drive sprocket (33) and a chain (30) installed between the drive sprocket (31) and the driven sprocket (33).

The chain chamber (75) surrounding the drive sprocket (31), driven sprocket (33), and chain (30) has an oil passage (106) that opens laterally and supplies lubricating oil into the chain chamber (75). ) is provided.

The lubricating oil supplied via the core oil passage (106) is supplied to the wall (
110) to the meshing part (111) of the driven sprocket (33) and the chain (30), and is carried upward by the chain (30) and connected to the chain mechanism (30).
´) Lubricate the entire area.

Since the lubricating oil supply section on the wall (110) is covered by the magnetic body (114) disposed above, the chain chamber (
75) After lubricating the inside, the lubricating oil is supplied from the oil path (106) and falls onto the magnetic body (114) without being mixed with the lubricating oil flowing down the lubricating oil supply part, and the foreign matter mixed in is removed.

In the above description, each element is given a reference numeral for convenience of explanation, but these do not limit the configuration of the present invention.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a four-wheel drive transfer employing a chain chamber lubrication device for a four-wheel drive transfer according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the lubrication device.

In FIG. 1, a torque converter 1 and an automatic transmission 2 mainly consisting of a plurality of planetary gear mechanisms are disposed at the rear end of the engine, and a transfer 3 is disposed further at the rear end of the automatic transmission 2. be done.

The torque converter 1 has a pump impeller 4, a turbine runner 5, a stator 6, and a lock-up clutch 7. When the rotation of the engine is transmitted to the pump impeller 4, the fluid contained therein flows around the shaft. Rotate. As a result, the pump impeller 4 is
A swirling flow is generated that circulates between the pump impeller 4 and the turbine runner 5, and the rotation of the pump impeller 4 is transmitted to the turbine runner 5.

The engine torque manually applied through the pump impeller 4 is amplified in the torque converter 1, output from the input shaft 8, and input to the automatic transmission 2.

The automatic transmission 2 has a planetary gear, a multi-disc brake, a multi-disc clutch, and a one-way clutch, and by appropriately combining them, it can change gears such as 1st, 2nd, 3rd, and 4th forward or reverse gears. can be shifted. The rotation after the gear change is performed within the automatic transmission 2 is output from the transmission output shaft 9.

The transmission output shaft 9 is arranged such that its rear end is located near the end of a transmission case 10 that accommodates the gear mechanism of the automatic transmission 2. The transformer/engine output shaft 9 is connected to the transfer input shaft 2 via the sleeve 11, and the end surfaces of both shafts 9 and 12 are brought into contact with each other.

Here, spline connections are made between the inner circumferential surface of the sleeve 11 and the outer circumferential surface of the transmission output shaft 9, and between the inner circumferential surface of the sleeve 11 and the outer circumferential surface of the transfer fine buttshaft 12. 9 and the transfer input shaft 12 can be absorbed.
Furthermore, concentricity between both shafts 9 and 12 can be ensured.

The transmission output shaft 9 has a fourth portion 13, and the transmission output shaft 9 has a transmission output shaft 2.
A convex portion 14 is formed at the convex portion 1314, and the lubricating oil flowing through the connecting portion of both shafts 9, 12 is sealed by the convex portion 1314. Further, a speed sensor 15 is provided on the outer periphery of the sleeve 11.
is fixed and rotates with both shafts 9.12,
The rotation is adapted to be detected.

Next, the transfer 3 accommodates in a transfer case 21 a planetary gear 22, a differential limiting mechanism 23, and a cylinder 25 for engaging and disengaging a clutch 24 constituting the differential limiting mechanism 23. And the planetary gear 22
is sun gear 17, pinion gear 18 and ring gear 1
The torque input to the carrier 26 via the transfer shaft 12 is distributed according to the gear ratio, with torque for the front wheels coming from the sun gear 17 and torque for the rear wheels coming from the ring gear 19. Output.

In this case, under normal running conditions, torque is distributed such that 3 is applied to the front wheels and 7 is applied to the rear wheels, depending on the gear ratio of the planetary gear 22. When the differential limiting mechanism 23 is activated, torque distribution is performed such that, for example, both the front and rear wheels have a torque of 5.

And between the automatic transmission 2 and the transfer 3,
A chain 30 is provided to transmit the torque output from the sun gear 17 to the front wheel differential. In order to install and drive the chain 30, a drive sprocket 31 is provided around the transfer input shaft 12, and a driven sprocket 33 is provided on the output shaft 32 arranged in parallel with the transfer input shaft 12. There is. The chain 30 and both sprockets 31 and 33 are surrounded by a chain cover 34.

Further, a rear output shaft 35 that rotates integrally with the ring gear 19 is disposed at the rear end of the transformer shaft 12, and a recess 36 formed in the rear output shaft 35 is connected to the transformer via a bush 37. It is rotatably supported by the convex portion 38 of the fine punt shaft 12. The end portion of the rear output shaft 35 constitutes an extension portion 40, and a lip type seal 39 is disposed thereon. The extension part 40 is surrounded by an extension housing 4.

Above automatic transmission A2, chain machine horizontal 30' transfer 3
and the extension part 40 are connected to the transmission case 10 and the chain cover 34, respectively, as described above.
, a transfer case 21 and an extension housing 41. The transmission case 10 and the chain cover 34 and the transfer case 21 and the extension housing 41 are connected by spigot joints.
4 and the transfer case 21 are connected by pin joints to ensure concentricity between the elements of each part.

That is, the transmission output shaft 9 is connected to the transmission case 10 through bushings 51 and 52, and the transfer input shaft 12 is connected to the chain cover 34 and the transfer case 21 through hair rings 53 and 54 arranged around the drive sprocket 31. , the rear output shaft 35 is connected to the transfer input shaft 12 and the extension housing 4 via a bush 37 and a bearing 55.
1 is supported.

The automatic transmission 2 and transfer 3 having the above configuration are as follows:
It has various rotating members such as a planetary gear 22, a multi-disc clutch, a multi-disc brake, and a one-way clutch, and lubricating oil is supplied to these rotating members. The 'A lubricating oil is the same lubricating oil that lubricates elements such as the engine, and when the oil pump 61 is driven to rotate, the oil in the oil pan 62 is sucked through the strainer 63, and the oil is lubricated. It is supplied to each rotating member as oil.

That is, as shown in FIG. 2, the lubricating oil discharged from the oil pump 61 is
Sent to 00. The primary regulator valve 10
The oil pressure regulated at 0 is sent to the secondary regulator valve 102 via the oil passage 101, and the pressure is regulated to the lubricating oil pressure at the secondary regulator valve 102.

The lubricating oil discharged from the secondary regulator valve 102 is transferred to the automatic transmission 82 via an oil passage 103.
04.105 to transfer 3 and oil line 1
04.106 to the chain mechanism 30'.

Here, the oil passages 103, 104, and 105 are arranged independently from each other, and each oil passage receives lubricating oil directly from the secondary regulator valve 102.

Therefore, even if a large amount of oil is required in one oil passage, the amount of oil to other oil passages is not affected.

Next, FIG. 3 shows the lubricating oil supply route.

In the figure, the lubricating oil supplied to the transmission output shaft 9 through the oil passage 103 flows in the axial direction through a passage 64 formed in the transmission output shaft 9, and then due to centrifugal force. On the other hand, the oil passage 103 flows out to the outside of the transmission output shaft 9 through oil holes 65, 66, 67, 68, 69, and 7071 to lubricate each brake, clutch, one-way clutch, etc. in the automatic transmission 2. The oil flowing through the oil passage 104 branched from the oil chamber 72 is forced into the oil hole 73 through the oil chamber 72 .

A passage 7 formed in the transfer shirt eye 2
4 flows in its axial direction, and before being sent to the oil chamber 72, it further branches and flows through the oil path 106, and the chain machine f
j130' is supplied to the chain chamber 75 in which the chain chamber 75 is accommodated.

The lubricating oil supplied to the passage 74 is supplied to each rotating member of the transfer 3. That is, the lubricating oil flowing in the radial direction through the oil hole 76 lubricates the bushing 77 and then
It flows in the radial direction and is stopped by the action of the weir 78 to lubricate the bearing 53.

The lubricating oil flowing radially through the oil hole 79 flows into the oil reservoir 8.
0, the oil flows further through the oil hole 81 and is sent to the outer periphery of the drive sprocket 31 to lubricate the chain 30.

Furthermore, the lubricating oil flowing in the radial direction through the oil holes 83 lubricates the portion of the differential limiting mechanism 23 that slides on the fixed portion, and also lubricates the clutch 24 of the differential limiting mechanism 23 . In order to supply sufficient lubricating oil to the clutch 24, a weir 87 is formed in the thalassochi hub 86.
The lubricating oil dammed up flows radially outward from the oil hole 88 and lubricates the clutch 24.

The lubricating oil flowing radially through the oil hole 89 connects the thrust bearing 90 and the planetary gear 22 to the oil hole 89.
The lubricating oil flowing radially through 1 lubricates the washers 92, respectively.

Furthermore, the lubricating oil that has reached the rear end of the transfer input shaft 12 is sent out to a passage 94 in the rear output shaft 35 through a shaft hole 93 formed in the end surface. The lubricating oil lubricates the bushing 37 and flows radially through the oil holes 95 to lubricate the hair ring 96 and the washer 97.

The lubricating oil that has reached the rear end of the passage 94 flows radially through the oil hole 98 and lubricates the bearing 55.

The lubricating oil that lubricates the bearing 55 and flows out is sealed by a lip type seal 39. A return oil passage 107 is opened in the oil chamber 99 formed between the bearing 55 and the seal 39, and lubricating oil is circulated to the chain chamber 75 through the return oil passage 107. .

Next, FIG. 4 shows a sectional view of the chain chamber.

In the figure, the chain cover 34 has a substantially oval chain chamber 75, and the drive sprocket 31, the driven sprocket 33, and the chain 30 stretched between the sprockets 31 and 33 are accommodated in the chain chamber 75. has been done. The chain 3o moves in the direction indicated by the arrow, and the lubricating oil flowing in through the oil passage 106 moves in the direction indicated by the arrow B.
It flows down along the wall 110 as shown in the figure, and is caught in the chain 30 at the meshing part 111 where the chain 30 and the driven sprocket 33 mesh.

Then, the caught lubricating oil moves together with the chain 30 and is sent to the tribe sprocket 31 side, and after lubricating that part, a part of it falls into the oil reservoir 112. A return oil passage 107 extending from the extension housing 41 is open to the core oil reservoir 112, and return oil from the oil chamber 99 is returned.

Further, a drain port (not shown) is opened in the oil reservoir 112, and the oil in the oil reservoir 112 is drained and discharged to the oil pan 62 and returned to the transmission system.

Reference numeral 114 is a magnetic material that covers the upper part of the lubricating oil supply section formed by the wall 110, and that attracts and removes foreign substances such as chips mixed in the lubricating oil falling in the chain chamber 75. To prevent foreign matter from being sent to the transmission system and transfer system and damaging each rotating member. Further, the lubricating oil supplied from the oil passage 106 is prevented from mixing with the lubricating oil falling inside the chain chamber 75.

Further, 115 is a bolt for fixing the chain cover 34 to the transfer case IO, and 116 is a knock pin for positioning the chain cover 34 to the transfer case 21.

By having the above configuration, the chain chamber 75
There is no need to immerse the chain 3o in lubricating oil, so-called "soaking", and the temperature rise of the lubricating oil can be suppressed.

Note that the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a four-wheel drive transfer employing a chain chamber lubrication device for a four-wheel drive transfer showing an embodiment of the present invention, Fig. 2 is an enlarged view of the lubricating device, and Fig. 3 is a cross-sectional view of a four-wheel drive transfer using a chain chamber lubrication device for a four-wheel drive transfer. FIG. 4, which shows the supply route, is a sectional view of the chain chamber. l...torque converter, 2...automatic transmission, 3...
...Transfer, 4...Pump impeller, 5...
Turbine runner, 6... Stator, 7... Lock-up clutch, 9... Transmission output shaft, 10... Transformer solution case, 1
DESCRIPTION OF SYMBOLS 1...Sleep, 12...Transfer Punto shaft, 17...Sun gear, 18...Binion gear, 19...Ring gear, 21...Transfer case, 22...Planetary gear, 26...・・Carrier, 31・Dry fiber Kent, 33・Driven sprocket, 35・Rear output shaft, 40・Extension part, 41・Extension housing, 61・Oil pump ,6
2...Oil pan, 63...Strainer, 64.7
4.94... Passage, 102... Secondary regulator valve, 101, 103104, 105.106.
...Oil road, 107...Return oil road, II2...Mountain: Stay.

Claims (1)

[Claims] A drive sprocket that engages with a transfer input shaft to drive the rotation; a driven sprocket that engages with an output shaft to transmit the rotation of the drive sprocket; a chain that is installed between the drive sprocket and the driven sprocket; and the drive sprocket. A chain chamber surrounding the sprocket, driven sprocket, and chain; an oil passage that opens on the side of the chain chamber and supplies lubricating oil into the chain chamber; and a lubricating oil supplied through the oil passage to the driven sprocket. A four-wheeled wheel, characterized by having a wall body that guides the chain to the meshing part thereof, and a magnetic body that is disposed above the wall body so as to cover a lubricating oil supply part and that removes foreign substances in the lubricating oil. Drive transfer chain chamber lubrication device.