JPS63176871A - Lubricating device for transmission - Google Patents

Abstract

PURPOSE:To surely feed lubricating oil into a lubricating oil passage even though centrifugal force is effected due to the rotation of an output shaft, by forcingly feeding lubrication oil for a speed meter gear and the like under the drive of a screw type pump in association with the rotation of the output shaft. CONSTITUTION:An output shaft 3 pivotally supported to a housing 2 for a transmission, rotates a speed member gear S through a worm 5 and forms a screw type pump P between the worm 5 and a cylinder 7 disposed therein with the extension worm part 50 of the worm 5. Accordingly, due to the rotation of the output shaft 30, the screw type pump P forcingly feeds lubrication oil fed to the speed gear S from an oil supply trough 10, into a discharge chamber 8, and therefore, feeds the same to several parts of the inside of a transmission casing 1 through a passage 9 in the output shaft 3. Thus, it is possible to surely feed lubrication oil into several sections of the transmission, overcoming the centrifugal force due to the rotation of the output shaft.

Description

[Detailed description of the invention] (Industrial application field) TECHNICAL FIELD The present invention relates to a lubricating device for a Transmitsiron.

(Prior Art) Generally, a plurality of speed change gears are rotatably supported on the output shaft of a transmission via bearings, and a synchronized mesh mechanism selectively interlocks and connects each of the speed change gears and the output shaft. etc., and it is necessary to supply lubricating oil to the drive parts of these transmission gears and synchronized mesh mechanisms to prevent seizure.

By the way, in such a transformer, in order to supply lubricating oil to the lubricating portion, a shaft hole extending in the axial direction is formed in the axial center of the output shaft, and the shaft hole is used as a lubricating oil path for the lubricating oil. There are so-called shaft lubrication means, which are especially used in front-engine, front-drive automobiles (F
It is effective for Transmitushiron used in F cars).

That is, in the transmission, no other shaft member is connected continuously to one axial end of the output shaft, in other words, one axial end of the output shaft becomes an open end. Therefore, the lubricating oil passage can be opened at the shaft end of the output shaft, and lubricating oil can be easily supplied into the lubricating oil passage from the opening.

However, in a transmission of a front engine rear drive vehicle (FR vehicle) in which a propeller shaft is coaxially and continuously connected to the end of the output shaft, the lubricating oil passage is connected to the shaft end of the output shaft. It is very difficult to open at the end and supply lubricating oil through this opening.

As mentioned above, for example, when a propeller shaft is coaxially and continuously connected to the shaft end of an output shaft, the means for introducing lubricating oil into the lubricating oil path formed in the axial center of the output shaft is as follows. A communication path extending radially outward and opening to the outer circumferential surface of the output shaft is formed in a longitudinally intermediate portion of the output shaft, and the output shaft is connected from the outer circumference midway in the lengthwise direction of the output shaft through the communication path. It is conceivable to supply lubricating oil toward the shaft center.

However, if the communication passage extending in the radial direction of the output shaft is formed as described above and the lubricating oil is supplied from the outer periphery in the middle of the length direction of the output shaft toward the axial center of the output shaft through the communication passage, Due to the centrifugal force caused by the rotation of the output shaft, the lubricating oil that is intended to be introduced into the communication passage does not flow toward the lubricating oil passage, making it very difficult to supply lubricating oil to the lubricating oil passage.

The present invention was developed in view of the above circumstances, and its purpose is to focus on the fact that the output shaft is provided with a worm that constitutes a speedometer gear, and to utilize this worm effectively. Another object of the present invention is to provide a transmission lubricating device that can reliably supply lubricating oil to a lubricating oil path formed in the axial center of the output shaft even from the outer periphery in the middle of the output shaft in the length direction.

(Means for Solving the Problems) Accordingly, the present invention provides a lubricating oil passage (9) extending in the axial direction of the output shaft (3) rotatably supported in the housing (2)
) to supply lubricating oil to the lubricating parts of the transmission through the lubricating oil passage (9), the worm wheel (6) of the speedometer gear (S) ) that meshes with the worm (5
) is provided on the output shaft (3), and the worm (5) is extended in the axial direction with respect to the meshing portion with the worm wheel (6) to provide an extension worm g (50), and the housing (2 ), a cylinder (7) for accommodating the extended worm part (50) is provided at a portion facing the extended worm part (50), and the extended worm part (50)
and the cylinder (7) constitute a screw type pump (P) in which the meshing part side is the suction side, while the housing (
A lubricating oil discharge chamber (8) communicating with the cylinder (7) is provided on the discharge side of the pump (P) in 2), and a lubricating oil discharge chamber (8) communicating with the cylinder (7) is provided midway in the length direction of the output shaft (3), one end of which is connected to the discharge chamber. It is characterized by providing a connecting passage (90) which communicates with the chamber (8) and whose other end communicates with the lubricating oil passage (9).

(Function) According to the present invention, the speedometer gear (
The lubricating oil supplied to S), etc. is pressurized and sent to the discharge chamber (8), and is forced from the discharge chamber (8) to the lubricating oil passage (9) via the connection passage (90). It is sent to.

(Example) A transmission lubricating device according to the present invention will be described below according to an example shown in the drawings.

The transmission shown in the figure is used in a front-engine, rear-drive automobile. In the figure, (1) is the transmission case, and (2) is the transmission case (1).
The extension housing is assembled to the negative side of the transmission case (1) and the output shaft (3) is inserted into the extension housing (2) from inside the transmission case (1) to the bearing (31).
), and the output shaft (3)
A propeller shaft (4) extending coaxially with the output shaft (3) is connected to the shaft end of the output shaft (3) via a cylinder (40).

Further, as is known, on the Mitsushiron case (1) side of the output shaft (3), there are bearings (32a) (33) that mesh with a counter gear (not shown).
A synchronized meshing mechanism (34) is provided which rotatably supports the transmission gears (32) and (33) via the output shaft (3) and selectively operatively connects the transmission gears (32) and (33) to the output shaft (3).

Further, a worm (5) constituting the speedometer gear (S) is provided on the extension housing (2) side of the output shaft (3), and a worm (5) constituting the speedometer gear (S) is provided in the extension housing (2). The worm wheel (6) is placed and the worm wheel (6) is placed.
6) is engaged with the worm (5).

On the other hand, the extension housing (
An oil supply gutter (10) is disposed above the worm wheel (6) in the transmission gear (32) (3).
The lubricating oil splashed up by the rotation of step 3) is transferred to the gutter (10).
and is supplied to the speedometer gear (S) via the extractor (10).

In the transmission configured as described above, in the embodiment shown in the figure, the worm (5) provided on the output shaft (3) is connected to the propeller shaft (4) at the meshing portion with the worm wheel (6). ) side, and an extension worm part (50) is integrally formed with the extension worm part (50) at a portion of the extension housing (2) facing the extension worm part (50).
0) with a cylinder hole (70) accommodating the cylinder (
7), and the extension worm part (50) and the cylinder (7) have a meshing part side between the worm (5) and the worm wheel (6) as the suction side. and the housing (
In 2), a lubricating oil discharge chamber (8) communicating with the cylinder chamber (70) of the cylinder (7) is provided on the discharge side of the pump (P).

On the other hand, the output shaft (3) is provided with a lubricating oil passage (9) extending in the axial direction at its axial center, and extending in the radial direction midway in the length direction of the output shaft (3), one end of which is connected to the discharge port. A connecting passage (90) is provided which communicates with the chamber (8) and whose other end communicates with the lubricating oil passage (9).

Next, the operation of the transmission lubrication system having the above structure will be explained.

Due to the rotation of the transmission gears (32) and (33) as the engine is driven, the lubricating oil stored in the transmission case (1) is splashed up by the transmission gears (32) and (33), and some of it is flows into the oil supply gutter (10), passes through the extraction machine (10), and is removed from the extension housing (
2), flows down onto the speedometer gear (S), and lubricates the worm (5) and worm wheel (6) that constitute the speedometer gear (S).

The lubricant /lII that has flowed down to the worm (5) is further sent to the extended worm part (50) by the rotation of the t-arm (5) in conjunction with the rotation of the output shaft (3). ,
It enters the cylinder chamber (70) of the cylinder (7) and is pressurized by the screw pump (P) composed of the cylinder (7) and the extension worm part (50), and the discharge chamber (8) said connecting passageway (90).
At this time, the lubricating oil passing through the connecting passage (90) is supplied to the output shaft (
Although centrifugal force occurs due to the rotation of step 3), since the lubricating oil in the discharge chamber (8) is pressurized by the pump (P), the lubricating oil overcomes the centrifugal force and the lubricating oil The bearings (32a) (
33a) and so on.

(Effects of the Invention) As described above, the present invention forms a lubricating oil passage (9) that extends in the axial direction around the axis of the output shaft (3) that is rotatably supported in the housing (2). (9) In a transmission in which lubricating oil is supplied to the lubricating parts of the transmission through the speedometer gear (S)
A worm (5) that meshes with the worm wheel (6) is provided on the output shaft (3), and the worm (5) is extended in the axial direction with respect to the meshing part with the worm wheel (6) to form an extended worm. A cylinder (7) for accommodating the extension worm part (50) is provided at a portion of the housing (2) facing the extension worm part (50). 50) and the cylinder (7) constitute a screw type pump (P) in which the meshing part side is the suction side, while the housing (2)
The cylinder (
A lubricating oil discharge chamber (8) communicating with the lubricating oil passage (7) is provided, and one end communicates with the lubricating oil passage (8) and the other end communicates with the lubricating oil passage (8) in the middle of the length direction of the output shaft (3).
By providing a connection passageway (90) communicating with 9),
The screw pump (P) as the output shaft (3) rotates
, the lubricating oil supplied to the speedometer gear (S) etc. is pressurized and sent to the discharge chamber (8) from the discharge chamber (8) to the cylinder shaft (3).
) is forcibly fed into the lubricating oil passage (9) through the connecting passage (90) provided midway in the length direction.
The output shaft (3) is attached to the lubricating oil passing through the connection passage (90).
Although centrifugal force is applied due to the rotation of the lubricating oil, the lubricating oil overcomes the centrifugal force and is reliably introduced into the lubricating oil passage (9). Even if the propeller shaft is coaxially and continuously connected to the shaft end of the output shaft, the lubricating oil path formed in the axial center of the output shaft can be reached from the outer periphery midway in the length direction of the output shaft. This made it possible to reliably supply lubricating oil to the

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of a transmission lubrication device according to the present invention. (3)...Output shaft (S)...Speedometer gear (5)...
... Worm (50) ... Extension worm part (6) ... Worm wheel (7) ... Cylinder (P) ... Screw type pump (8) ... ...Discharge chamber (9) ... Lubricating oil path (90) ... Connection passage

Claims (1)

[Claims] A lubricating oil passage (9) extending in the axial direction is formed at the axis of the output shaft (3) rotatably supported in the housing (2), and lubricating parts of the transmission are lubricated through the lubricating oil passage (9). A transmission lubricating device configured to supply oil, the worm (5) meshing with the worm wheel (6) of the speedometer gear (S) being connected to the output shaft (3).
), the worm (5) is extended in the axial direction with respect to the meshing part with the worm wheel (6) to provide an extended worm part (50), and the extended worm part (50) is provided in the housing (2). A cylinder (7) for accommodating the extension worm part (50) is provided at a location facing the extension worm part (50) and the cylinder (7).
) with the meshing part side being the suction side (P)
On the other hand, a lubricating oil discharge chamber (8) communicating with the cylinder (7) is provided on the discharge side of the pump (P) in the housing (2), and the length of the output shaft (3) is A transmission lubricating device characterized in that a connecting passage (90) is provided in the middle of the direction, one end communicating with the discharge chamber (8) and the other end communicating with the lubricating oil path (9).