JPS6078830A - Lubricator for differential gear of automatic transmission axle - Google Patents

Abstract

PURPOSE:To spout oil against a differential gear case and forcedly supply the oil into the case from the lubricating oil supply port of the case in order to enable constant lubrication for sureness by installing a pipe as to have the end thereof opposed to the inside of the turning face of the lubricating oil supply port thereof. CONSTITUTION:A torque converter is placed inside a coverter housing 2 while a differential case 4 is housed in a recess 3. A valve body 12 has various valves and is supplied with oil from an oil pump which is driven by an engine. Surplus oil overflowing from a pressure governing valve disposed inside the valve body 12 is sent to the torque converter after running through a working oil supply passage consisting of a port 13, a passage 14 and a port 15. The pipe 16 is connected to the connected line 13 to 15 and has the end 16a thereof directed to the case 4 at the inside of the turning face of a lubricating oil supply port 4a, whereby forcedly sending oil to the case.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a differential gear lubrication system for an automatic transaxle used as a power unit of a front-wheel-drive vehicle (FF*) with a cocoon-mounted engine or a rear-wheel-drive vehicle (RR vehicle) with a rear-mounted engine. 〇 (A two-wheel conventional automatic transaxle is constructed by housing a torque converter, a transmission mechanism, and a differential gear in a common housing. Therefore, in such an automatic transaxle, the differential gear When lubricating a differential gear, the conventional method is to stir the oil stored in the lower part of the housing using various gear elements, and then use the scraped up oil to lubricate the oil.However, differential gears require that all gear elements Since the structure is surrounded by a case, even if a lip is placed on the outer surface of the case to make it easier for the oil to be pumped up to the gear inside the case, the lubrication of the differential gear will still not be completely achieved. The reality is that it is difficult to do so.

Therefore, as shown in Japanese Unexamined Patent Publication No. 54-146826, there is a problem with torque converters! I! IJ'm J
) A technology has been proposed in which the oil discharged from the four-way path flows down above the two differential gears. Shi〃1
However, with this differential gear sliding method, the oil simply falls naturally onto the differential gear case in an unpressurized state, so it is splashed by the differential gear case during one rotation and reaches the inside of the differential gear case. (8) Purpose of the Invention The present invention attempts to solve the above-mentioned problem by spraying pressurized oil onto the differential gear. For the differential gear to fit, it is necessary that the pressurized oil mentioned above be sprayed onto the differential gear during its operation, and that the dazzling oil must be cooled and not hot oil. From the viewpoint of
The two objectives are to provide a "7" Renchargi device.

(4) Structure of the Invention For this purpose, the present invention provides, in the above-mentioned automatic transaxle, a pipe is connected to the hydraulic oil supply path of the torque converter, and the tip of the pipe is provided in the differential gear case. +1 size (characterized in that it is disposed within the rotating plane of the Vt oil inflow hole and directed toward the cough case) (5) Embodiments The present invention will be described in detail below with reference to embodiments shown in the drawings.

Fig. 1 shows an automatic transaxle equipped with a differential gear lubrication device according to the present invention, which is constructed by combining the clamp parts 1 and 1 (indicated by housings 1 and 2) to clamp parts. In the drawing, (for convenience of explanation of the device of the present invention) one of the mounting parts σ is shown, and the other mounting part (7) is shown on the front side in the drawing. A torque converter is housed in the housing part 2, and a differential gear case 4 is housed in the recess 3 of the same housing part, as shown by the chain line. A transmission mechanism is housed in the transmission mechanism, and this gear transmission mechanism receives engine power through an input shaft bearing in a hole 5 through a torque converter, and changes the speed of this power. The shifting power is
The signal is transmitted to the final drive shaft supported in the hole 8 via an output drive gear 6 disposed coaxially with the hole 5 and bearing the other clamp portion G, and an output driven gear 7 meshing therewith. A final drive gear 9 is integrally formed on this shaft, and a final driven gear 10 that meshes with this shaft is integrally connected to the differential gear case 4, so that the shifting power is transmitted from the output driven gear 7 to the final drive gear 9 and then to the final driven gear IO. Differential gear, case 4
and rotates it in the direction of arrow α. Thus, the differential gear is connected to hole 1 in one I-clamp part.
The power is distributed to the drive wheels (front two axles) from the side gear shaft that exits from the holes 7 to 1 through holes provided in the other nozzle portion in alignment with 1 and 2 and outputs the power.
Enables FF cars to run.

Reference numeral 12 denotes a pulp bottle, which is supplied with oil from an oil pump (not shown) that is equipped with various oil pumps and driven by an engine, and which changes the power transmission path of the gear transmission mechanism by hydraulic operation. Perform the Hishiren.

Excess oil flowing out from the pressure regulating valve inside the valve body 12 is supplied to the torque converter via a hydraulic oil supply path consisting of a boat 13, a passage 14, and a boat 15, and is then removed from the torque converter. However, the inside of the torque converter, and thus the inside of the hydraulic oil supply paths 18 to 15, is maintained at a predetermined pressurized state by a pressure holding valve provided in the middle.

In the present invention, a pipe 16 is provided connected to the torque converter's IJfυ oil supply passages 18-'U, , 5, and is fixed within the housing 1 with clamps 17, 18 for piping. The tip 1.6a of the pipe 16 is directed toward the tee 7 differential gear case 4 within the rotational plane of the +I'A fi oil inlet 4a provided in the differential gear case 4; It is better to bias the value by ε. As shown in FIG. 2, the pipe tip 16a is preferably made small in diameter by, for example, attaching an orifice member 19 with an orifice loa therein.

The differential gear 7'' sliding device of the present invention is melted in this manner, and its function will be explained below. During engine operation, pressurized oil is constantly supplied to the torque converter through oil passages 13 to 15. , which partially branches from the passage 14 and flows into the pipe 16, and is supplied from the tip 16a to the differential gear case 4.By the way, since the oil is in a pressurized state and passes through the orifice 19a, the oil flows vigorously. The oil is sprayed onto the differential gear case 4.Then, each time the lubricating oil inlet hole 4a of the differential gear case 4 is aligned with the orifice 19a, the oil is sprayed onto the corresponding hole 4a.
It is forcibly press-fitted into the differential gear case 4, and the gear elements therein and the shafts associated therewith can be reliably lubricated at all times. This effect is further facilitated by the fact that the pipe tip 16a is biased by ε toward the forward rotational direction of the differential gear case 4. In addition to the above-mentioned action, the orifice 19a also serves to prevent the internal pressure of the torque converter from decreasing due to the outflow of the oil used for lubrication.

Thus, the differential gear lubrication device of the present invention is provided with a pipe 16 connected to the hydraulic oil supply paths 18 to 15 of the torque converter, and the tip 16a of the pipe 16 is arranged within the rotational surface of the lubricating oil inflow hole 4a of the differential gear case 4. Since the oil is directed toward the case 4, the oil in the cooled and pressurized torque converter hydraulic oil supply passages 18 to 15 is vigorously sprayed onto the alencial gear case 4, and the oil is forced through the hole 4a. It can be injected into the inside of 4 to reliably lubricate the inside at all times. Moreover, since the pressure can be used to reliably spray the desired area, less lubricating oil is required.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the housing portion of an automatic transaxle equipped with the lubricating device of the present invention, and FIG.
It is a u sectional view. 1...Housing 2...Converter housing 8
... Differential gear storage 4 ... Differential gear case 5 ... Gear transmission mechanism input shaft bearing hole 6 ... IB jE tot gear 7 ... Output driven gear 8 ... Final drive shaft bearing hole 9・
...Final drive gear 10...Final driven gear 11...Side gear shaft insertion hole 12...Pulp body 13 to 15...Torque:'> IJ oil supply + by Barta? u+N16... Pipe 16a... Pipe tip 17.18... Clamp 19... Orifice 7t
l+ ag19a...orifice.

Claims (1)

[Claims] 1. In an automatic transaxle that includes a torque converter, a gear transmission mechanism, and a differential gear housed in a common housing, a pipe is provided connected to the hydraulic oil supply path of the torque converter, and the tip of the vibrator is connected to the hydraulic oil supply path of the torque converter. A differential gear lubricating device for an automatic transaxle, wherein the lubricating oil inflow hole provided in the case of the differential gear is disposed within the rotating surface and directed toward the case.