JPH02309099A - Power transmitting device - Google Patents

Abstract

PURPOSE:To dispense with the oil change for a long period by sealing a power transmitting section with a case, mixing multiple capsules sealed with an additive agent in the oil filled in the case, solving the capsules in sequence in aging steps. CONSTITUTION:Circular chambers 77 and 79 are formed between a differential case 31 and hub sections 73 and 75. Multiple clutch plates 81 and 83 arranged on the differential case 31 and the hub sections 73 and 75 in turn are coupled in the circular chambers 77 and 79 in the rotating direction to constitute a pair of clutch plate groups 85 and 87. Fastening sections 89 and 91 pressing and fastening the plate groups 85 and 87 between the differential case 31 when shafts 61 and 63 are pulled to the left and to the right are provided at end sections of the hub sections 73 and 75. An oil chamber 93 is formed on the inner periphery of the hub sections 73 and 75, and the oil chamber 93 is commu nicated to the circular chambers 77 and 79 via through holes 95 and 97 formed on the hub sections 73 and 75. Gear oil is filled in the oil chamber 93, and capsules 101 sealed with an additive agent such as a compound. for example, are mixed in the oil 99.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a power transmission device used in vehicles and the like.

(Prior art) As a conventional power transmission device of this type, for example,
There is one described in Japanese Patent No. 2-209249. As shown in FIG. 3, this device connects a differential case 201 to a differential carrier 207 via bearings 203 and 205.
A pair of friction clutches 2 which are rotatably supported by a pair of hub members 209 and 211 and provided between a pair of hub members 209 and 211 and a differential case 201.
13° 215 are fastened by respective actuators 217 and 219 provided on the differential carrier 207.

In this device, a friction clutch 213 inside the differential case 20. '215 f71 Wl has differential carrier 207
This is done by the gear oil filled inside. Additives such as sulfur compounds and phosphorus compounds are uniformly dispersed in this gear oil, which prevents oxidation of the oil and the bearings 203, 205. This prevents stick-slip of friction clutches 213, 215, etc.

(X!I Problem to be Solved by the Invention) By the way, such gear oil deteriorates over time due to the heat generated by the rotation of the differential case 201, so it is necessary to periodically change the oil.

When performing this oil change, it takes an extremely long time to completely remove the oil in the differential case 201, which is inconvenient.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a power transmission device in which the inside of the case is sealed and oil is sealed in the case so that there is no need to change the oil over a long period of time.

[Structure 1 of the Invention (Means for Solving the Problems) In order to achieve the above object, this invention seals a VJ force transmission part that requires lubrication with a case, fills oil in the case, and It is characterized in that a plurality of capsules encapsulating additives are mixed into the oil filled in the oil, and these capsules are sequentially dissolved or broken in stages over time, so that the additives are dispersed in the oil.

(Function) According to the above structure, the plurality of cavules mixed in the oil filled in the sealed case are sequentially dissolved or broken in stages over time, and new additives are dispersed in the oil. Deterioration of the oil is prevented, extending the life of the oil and eliminating the need for oil changes over a long period of time.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view showing the upper half of a power transmission device according to an embodiment of the present invention, and FIG. 2 is a skeleton diagram showing the structure of power transmission in a vehicle using this embodiment. In addition,
In the following description, the left and right directions correspond to the left and right directions in FIGS. 1 and 2 (), and the upper part of FIG. 1 corresponds to the front of the vehicle in FIG. 2.

First, the power transmission of this vehicle will be explained with reference to FIG.

The driving force of the engine 1 is changed in speed by a transmission 3 and transmitted to a transfer 5. The transfer 5 transmits the transmitted driving force on the one hand to the left and right front wheels 13, '15 via the front axle 9.11 by the front differential 7 (differential on the surface width side non-chassis device β'), and on the other hand. is transmitted to the propeller shaft 19 via the direction changing south width assembly 17,
The power is transmitted from the propeller shaft 19 to the ψ differential 21 (rear center differential), which is the power transmission device of this embodiment, and further transmitted to the left and right rear wheels 27.29 via the rear axle 23.25.

Next, the configuration of the rear differential 21 will be explained with reference to FIGS. 1 and 2.

The differential case 31 as a case has left and right support bosses 33.
It is rotatably supported on the differential carrier 41 via bearings 37 and 39 via 35.

As shown in FIG.
A ring gear 47 that matches the drive pinion gear 45 at the rear end of the gear 4 is fixed. In this way, the differential case 31 is rotationally driven by the drive horn from the engine 1.

The deck 1 flyer 41 consists of a gear 17 rear body 49 and side flanges 53 and 55 fixed to the left and right sides of this body with bolts 51. An O-ring 57.59 is provided between these side flanges 53.55 and the carrier body 49.

The left and right shafts 61.63 are rotatably and axially movably supported by the left and right support bosses 33.35 of the differential case 31. An annular four part 65.67 is formed on the inner circumferential surface of the support boss 33. It is being Therefore, the differential case 31 has a tM configuration in which the power transmission section is sealed inside.

Inside the differential case 31, both shafts [7ft 61°63
A hub portion 73, 75 is formed in the. differential case 3
1 and each hub portion 73, 75 are l-shaped chambers 7a, 79.
A plurality of clutch plates 81, 83 alternately arranged on the differential case 31 and each hub portion 73, 75 are engaged in the rotational direction in each annular chamber 77, 79 to form a pair of clutch plates. 85.87 is configured. Both hub parts 73.7
5 has a fastening part 89°91 that presses and fastens the clutch plate assembly 85.87 between the differential case 3'1 when the shafts 61 and 63 are pulled leftward and rightward, respectively. It is provided.

An oil chamber 93 is formed inside the differential case 31 by the inner circumferences of both hub portions 73 and 75, and this oil chamber 93
are a plurality of through holes 95. formed in both hub portions 73.75.
97 communicates with the annular chamber 77,79. oil v
93 is sealed by the seal members 69 and 71, and the oil chamber 93 is filled with gear oil 99.

A plurality of capsules 101 containing additives such as sulfur compounds and phosphorus compounds are mixed into the gear oil 99. These capsules 101 are made of rubber, plastic, etc., and the capsules 101 are gradually dissolved or torn over time so that the encapsulated additives are dispersed in the oil. Gradual dissolution over time is possible in combination with +1 breath of capsule 101 due to W.

Cylinder parts 103 and 105 are provided on the outside of each of the side flanges 53 * 55, and O-rings 107
, 109, 111. Piston part U115 via 113
．． 1'17 are slidably engaged, and the hydraulic actuator 1
19,121 are configured. Piston member 115.
A flexible seal member 123.125 is mounted between 117 and the side flange 53.55.

Both shafts 6 are located on the left and right outer sides of the differential carrier 41.
Seven flanges 127, 129 are splined to the ends of 1.63 and fixed with lock nuts 135, 137 through washers 131, 133. Piston member 1
The free end of 15, 117 is a ball bearing 139.14
1, the boss portion 143.1 of the flange 127.129.
145 and is rotatably supported. Said flange 12
7 and '129 are provided with bolt holes 1, 47 and 149 for flange connection to the rear axle 23 and 25, and dust covers 151 and 153 are attached to the outer periphery thereof.

Pressure oil is separately supplied to each of the hydraulic actuators 119 and 121 from a pressure outlet 11111 via a control valve device (not shown). The hydraulic actuators 119 and 121 can be operated manually from the driver's seat or automatically depending on steering conditions, road surface conditions, etc.

Next, the operation of the above embodiment will be explained.

When pressure oil is supplied to each hydraulic actuator 119.12"l, piston members 115, 117, ball bearings 139, 141, flange 127° 129, shaft 6
1.63 and the hub portion 73.87 are pressed and engaged, and the differential case 31 rotates from the shaft 61.63 to the left and right rear wheels 27.2 via the rear axle 23.25. transmitted to. At this time, if the fastening force is strengthened, the differential rotation between each shaft 61, 63 and the differential case 31 will be restricted, and a large amount of power will be transmitted; if the fastening force is weakened, the clutch plate assembly 85, 87 will slip, resulting in f i1 rotation. is allowed, and the transmitted driving force becomes smaller. By adjusting the pressure oil separately for the left and right wheels, it is possible to arbitrarily change the distribution ratio of driving force to the two rear wheels.

When the supply of pressure oil is stopped, the clutch plate assembly 85°87 is in the open state and the driving force transmission to the rear wheels 27.29 is
I will be treated.

In the power transmission device functioning as described above, the clutch plate sets 85, 87 are lubricated by nine oils filled in the oil chamber 93. And did you put additives in this oil 99? I number of capsules 101 are mixed in, and these capsules 1o1 are sequentially dissolved or broken in stages over time, and new additives are dispersed in the oil 99.

Therefore, since deterioration of the oil is always prevented by using new additives, there is no need to change the oil over a long period of time.

[Effects of the Invention] As is clear from the above description, according to the configuration of the present invention, a plurality of capsules mixed in oil filled in a sealed oil chamber are sequentially dissolved or broken in stages over time. New additives are dispersed into the oil, preventing oil deterioration and eliminating the need for oil changes over a long period of time.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the upper half of a power transmission device according to an embodiment of the present invention, Fig. 2 is a skeleton mechanism diagram showing power transmission in a vehicle using this embodiment, and Fig. 3 is a conventional example. FIG. 3 is a sectional view of such a power transmission device. 31...Differential case) 61.63...Shaft 85.87...Clutch plate assembly 93...9 oil chambers...Oil 101...
Capsule agent Patent attorney Hidekazu Miyoshi Figure 2

Claims (1)

[Claims] A power transmission part that requires lubrication is sealed in a case, the case is filled with oil, a plurality of capsules containing additives are mixed into the oil filled in the case, and these capsules are gradually removed over time. A power transmission device characterized in that the additive is dispersed in the oil by sequentially dissolving or tearing the oil.