JP4869513B2 - Lubricator for transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transmission lubrication device that can efficiently take in lubricating oil to be supplied to sliding parts such as gears and bearings.
[0002]
[Prior art]
Vehicles (passenger cars, buses, trucks, etc.) driven by engines, motors, etc. are equipped with a transmission in order to obtain speed and driving force according to driving conditions. Typical transmissions include automatic transmission (AT), CVT, manual transmission (MT), and the like.
By the way, all of such transmissions include various sliding portions such as bearings and gears.
And since these parts often have relatively large relative speeds and acting loads, they need to be properly lubricated. It is good if the high-pressure oil (lubricating oil) from the dedicated oil pump is sufficiently supplied to such sliding parts, but if not, it is necessary to devise a way to efficiently supply oil to the sliding parts. And
[0003]
For example, in Japanese Patent Application Laid-Open No. 2000-154865, as shown in FIG. 4 or FIG. 5, an oil catcher capable of actively collecting lubricating oil around the rotating shaft is provided on the outer peripheral side of the rotating shaft. It is disclosed. The lubricating oil collected by the oil catcher is guided to an oil hole opened on the outer peripheral side of the rotating shaft, and is supplied from there to an internal oil passage extending in the axial direction inside the rotating shaft.
[0004]
[Problems to be solved by the invention]
When the outer periphery of the rotating shaft is surrounded by an annular housing, it has been found that the oil catcher alone cannot efficiently collect the oil and supply the lubricating oil to the oil passage.
The present invention has been made in view of such circumstances. That is, an object of the present invention is to provide a transmission lubrication device that efficiently collects lubricating oil (oil) with an oil catcher and sufficiently guides the lubricating oil to an oil passage even when the rotating shaft is surrounded by a housing. And
[0005]
[Means for Solving the Problems]
The present inventor has determined that the fact that the lubricating oil in the housing is accompanied by the rotation of the oil catcher is a cause of a reduction in the amount of the lubricating oil flowing into the oil hole. As a result, the transmission lubrication device of the present invention was completed.
That is, the transmission lubrication device of the present invention includes a rotary shaft having an internal oil passage provided on the inner peripheral side, an oil hole communicating with the internal oil passage and opened on the outer peripheral side, and an outer periphery of the rotary shaft. In a lubricating device for a transmission comprising an oil catcher extending in the main rotational direction from the side and rotating integrally with the rotating shaft to collect the lubricating oil around the rotating shaft and guide it to the oil hole ,
Further, a housing that surrounds the rotating shaft and can store the lubricating oil around the rotating shaft, and is located on an inner peripheral surface of the housing, and the lubricating oil is rotated in the housing as the oil catcher rotates. And an inducing means for inducing a flow toward the oil hole of the rotating shaft in the lubricating oil.
[0006]
When the housing is provided around the rotating shaft, the lubricating oil is rotated as described above, and the lubricating oil around the rotating shaft rotates integrally with the oil catcher. For this reason, it is difficult for the lubricating oil flow from the outer peripheral side to the inner peripheral side of the oil catcher, that is, the lubricating oil flow from the oil catcher to the oil hole of the rotating shaft.
Therefore, in the present invention, means for preventing the accompanying rotation is provided in the lubricating oil that easily causes the accompanying rotation. Thereby, the flow of the lubricating oil to the oil hole is promoted, and the lubricating oil is more efficiently supplied from the oil hole to the internal oil passage.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described more specifically with reference to an embodiment related to a transmission lubrication device.
1 and 2 are sectional views of a transmission lubricating device 1 according to a first embodiment of the present invention. FIG. 1 is a cross-sectional view of a transmission lubrication device 1, and FIG. 2 is a vertical cross-sectional view thereof.
The transmission lubrication device 1 is provided in a known manual transmission, and includes an output shaft 50 (rotating shaft), an oil catcher 40 fixed to the output shaft 50, an output shaft 50, and an oil catcher 40. And an extension housing 10 surrounding the housing. Note that oil (lubricating oil) exists between the extension housing 10 and the output shaft 50, although not particularly illustrated.
[0008]
The output shaft 50 has a cylindrical internal oil passage 52 that extends in the axial direction inside, and an oil hole 51 that communicates with the internal oil passage 52 and is opened in the outer peripheral surface of the output shaft 50. The oil catcher 40 has a collection part 42.
Four recesses 13 (inducing means) are formed on the inner peripheral surface 14 of the extension housing 10. The concave portion 13 increases in depth from the front end portion 11 to the rear end portion 12 with respect to the main rotation direction S (that is, deeper in the radial direction). The front end portion 11 is smoothly connected to the inner peripheral surface 14. On the other hand, as for the rear end part 12, the curvature of the side wall of the recessed part 13 is changing on the rear end side.
[0009]
By the way, the oil existing between the extension housing 10 and the output shaft 50 can generate a flow such as R0 to R3 shown in FIG. 1 or FIG. 2 as the output shaft 50 and the oil catcher 40 rotate.
That is, the flow R 0 that rotates around the outer peripheral surface of the output shaft 50, the oil flow R 1 that is taken into the recess 13 near the inner peripheral surface of the extension housing 10 and scraped off by the rear end portion 12, and the oil catcher 40. Oil flow R2 that is taken in by the collecting portion 42 and flows toward the opening 43, the oil hole 51, and the internal oil passage 52, and the oil flow R3 that further diverts from the internal oil passage 52 to the desired sliding portion; It is thought to produce.
In particular, in the case of this embodiment, it is considered that the flow R1 has increased the flow R2 due to the presence of the recess 13 serving as the inducing means.
[0010]
Next, a transmission lubricating device 2 according to a second embodiment of the present invention is shown in FIG. The same parts as those in the first embodiment are denoted by the same reference numerals as in FIG.
The transmission lubrication device 2 is formed with a convex portion 23 protruding from the inner peripheral surface 24 instead of the concave portion 13 of the extension housing 10. The convex portion 23 can scrape off the oil that is being carried along with the rotation of the oil catcher 40. Therefore, it is considered that an oil flow R1 as shown in FIG. This flow disturbs the oil flow in the vicinity of the inner peripheral surface of the extension housing 20 and induces and increases the oil flow R2 from the oil hole 51 toward the internal oil passage 52.
[0011]
【Effect of the invention】
According to the lubricating apparatus for a transmission of the present invention, the inducing means inhibits the accompanying oil that exists between the rotating shaft and the housing, and the oil catcher promotes the flow of the lubricating oil to the oil hole, thereby lubricating the oil. Oil can be taken in efficiently.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view according to a second embodiment of the present invention.
FIG. 4 is an exploded perspective view showing a conventional transmission lubrication device.
FIG. 5 is a cross-sectional view after assembly of a conventional transmission lubrication device.
[Explanation of symbols]
10, 20 Extension housing (housing)
13 Concave portion (inducing means)
23 Convex part (inducing means)
40 Oil catcher 50 Output shaft (rotating shaft)
51 Oil hole 52 Internal oil passage

Claims (3)

A rotating shaft having an internal oil passage provided on the inner peripheral side and an oil hole communicating with the internal oil passage and opened on the outer peripheral side;
A speed change comprising an oil catcher that extends in the main rotation direction from the outer peripheral side of the rotating shaft, rotates integrally with the rotating shaft, collects lubricating oil around the rotating shaft, and guides it to the oil hole In machine lubrication equipment,
Further, a housing that surrounds the rotating shaft and can store the lubricating oil around the rotating shaft;
Located on the inner peripheral surface of the housing, at least partially hinders the accompanying rotation of the lubricating oil in the housing accompanying the rotation of the oil catcher, and causes the lubricating oil to flow toward the oil hole of the rotating shaft. A lubrication device for a transmission, comprising induction means for inducing the transmission. The transmission lubricating device according to claim 1, wherein the inducing means is a concave portion recessed from an inner peripheral surface of the housing. The transmission lubricating device according to claim 1, wherein the inducing means is a protrusion protruding from an inner peripheral surface of the housing.

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