JPH053721U - Differential gear lubricator - Google Patents

Abstract

(57) [Summary] [Object] The present invention prevents the lubricating oil scraped up by the final ring gear from leaking from the oil guide body, and moreover, causes the lubricating oil to be pressure-fed by the velocity energy of the lubricating oil, thereby providing the lubricating oil. Is efficiently supplied to the necessary lubrication points. Therefore, according to the present invention, the oil guide body for guiding the lubricating oil scraped up by the rotation of the final ring gear to the lubrication required portion is formed in a closed cross-sectional shape, and the oil inlet portion of the oil guide body is formed around the final ring gear. It is arranged so as to face the flow direction of the lubricating oil.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a differential lubrication device, and more particularly to a differential lubrication device capable of efficiently supplying lubricating oil scraped up by a final ring gear to a lubrication required location.

[0002]

[Prior Art]

 In the case of a vehicle, when the driving wheels on the left and right need to have a rotational speed difference due to a turning motion during driving, the differential ( And a differential device) on the front and the rear.

This differential is provided with a lubricating device that supplies lubricating oil, which is scraped up by the rotation of a final ring gear fixedly mounted on the outer wall surface of the differential case, to a lubrication necessary portion.

This lubrication device prevents the lubricating oil that is scraped up by the rotation of the final ring gear and flows to the inner surface of the outer case from being blocked and lubricated to the necessary lubrication point by providing an oil guide rib on the inner surface of the outer case. It is a configuration that leads. In addition, instead of the oil guide ribs, an oil gutter, which is an oil guide body having an open cross-sectional shape, is provided to supply the lubricating oil to a lubrication necessary portion.

Further, such a differential lubricating device is disclosed in, for example, Japanese Utility Model Publication No. 58-42681. In this publication, one end communicates with the space between the front bearing and the front oil seal in the carrier, and the other end communicates so as to open toward the rear friction point in the carrier. By configuring the return path of, the lubrication of the front bearing and the oil seal is maintained well, and the lubricating oil that returns from the front side to the rear side in the carrier is supplied to, for example, the friction point between the drive pinion and the ring gear. Especially.

[0006]

[Problems to be solved by the device]

 However, in the conventional lubrication system, the lubricating oil that is scraped up by the rotation of the final ring gear is guided by the oil guide ribs and the oil garter with an open cross-sectional shape. Since the directions of the parts do not face the direction of the lubricating oil flow, there is the inconvenience that the lubricating oil cannot be efficiently supplied to the lubrication required locations.

[0007]

[Means for Solving the Problems]

 Therefore, in order to eliminate the above-mentioned inconvenience, the present invention proposes, in a differential lubrication device that supplies the lubricating oil scraped up by the rotation of the final ring gear fixed to the differential case, to the lubrication required location by the rotation of the final ring gear. An oil guide body that guides the lubricating oil to be scraped up to the required lubrication point is formed in a closed cross-sectional shape, and the oil inlet part of this oil guide body is arranged around the final ring gear so as to face the lubricating oil flow direction. It is characterized by having done.

[0008]

[Action]

 According to the configuration of the present invention, the lubricating oil scraped up by the rotation of the final ring gear is easily received in the oil inlet portion which is arranged so as to face the direction of the flow of the lubricating oil, and has a closed cross-sectional shape. It is supplied to necessary lubrication points by an oil guide. Therefore, the lubricating oil does not leak from the oil guide body, and since the lubricating oil is pressure-fed by the velocity energy of the lubricating oil, the lubricating oil can be efficiently supplied to the lubrication necessary portion.

[0009]

【Example】

 Embodiments of the present invention will be described in detail and specifically below with reference to the drawings. 1 to 4 show an embodiment of the present invention. In FIG. 1, 2 is a differential mounted on the vehicle. The differential 2 is composed of a final reduction gear unit 4 and a differential unit 6. That is, the final reduction gear unit 4 is composed of a reduction small gear (not shown) which is a drive side gear and a final ring gear 8 which is a large reduction gear. Further, the differential portion 6 is configured such that a small diff gear 14 is fixed to a diff small gear shaft 12 arranged in the diff case 10, and a large diff gear 16 is meshed with the diff small gear 14. Left and right wheel shafts (not shown) are connected to the differential portion 6.

The final ring gear 8 is fixed to the outer wall surface of the differential case 10 by a plurality of fixing bolts 18.

One end of the differential case 10 is rotatably held by the first outer case 22 via the first roller bearing 20, and the other end is rotated by the side case 26 via the second roller bearing 24. Held possible. The side case 26 is fixed to a second outer case 28 that is joined to the end surface of the first outer case 22 and encloses the differential case 10 with a mounting bolt 30.

The final ring gear 8 is rotated clockwise as shown in FIG.

Therefore, an oil garter 32, which is an oil guide body that guides the lubricating oil scraped up by the rotation of the final ring gear 8 to the inside of the differential case 10 where lubrication is required, is provided.

The oil garter 32 is formed into a closed cross-section (cylindrical shape) and is arranged along the peripheral surface of the final ring gear 8 and along the inner surface of the second outer case 28. 34, and a second oil guide pipe 36 that is continuously provided to the first oil guide pipe 34 in a direction perpendicular to the first oil guide pipe 34 and is arranged along the inner surface of the first outer case 22. That is, the first and second oil guide pipes 34 and 36 are arranged along the inner surfaces of the first and second outer cases 22 and 28 so as not to interfere with the final ring gear 8 and the differential case 10.

The first oil guide pipe 34 is formed with an oil inlet portion 38 which is arranged around the final ring gear 8 so as to face the lubricating oil flow direction.

Further, the second oil guide pipe 36 is formed with an oil outlet portion 40 that is open in the axial direction of the differential small gear shaft 12.

The oil outlet portion 40 is disposed substantially in the center of the differential case 10, that is, in the axial center of the differential small gear shaft 12, and in the vicinity of the differential case 10. This prevents the lubricating oil flowing out of the oil outlet portion 40 from entering the inside of the differential case 10 due to the flow of air and lubricating oil around the differential case 10 caused by the rotation of the differential case 10.

Further, the cross-sectional area of the oil inlet portion 38 is formed smaller than the cross-sectional area of the oil outlet portion 40. As a result, the velocity energy of the lubricating oil in the first and second oil guide pipes 34, 36 is increased.

An oil garter mounting bracket 42 is fixed to the second oil guide pipe 36 of the oil garter 32. The oil garter mounting bracket 42 is fixed to the first outer case 22 by a bracket mounting bolt 44 and supports the oil garter 32.

Next, the operation of this embodiment will be described.

The lubricating oil scraped up by the rotation of the final ring gear 8 flows along the inner surface of the second outer case 28 in the rotation direction of the final ring gear 8 as shown in FIG.

Then, the lubricating oil flows in through the oil inlet portion 38 having a larger cross-sectional area than the oil outlet portion 40 and facing in the flow direction of the lubricating oil, and flows through the first oil guide pipe 34 and the second guide pipe 36. After that, the oil is supplied from the oil outlet portion 40 into the differential case 10 (see FIG. 4), and each gear in the differential case 10 is lubricated. That is, the lubricating oil from the oil outlet 40 flows into the differential case 10 through the opening S as shown in FIG.

In the oil garter 32 that guides the lubricating oil into the differential case 10, the oil garter 32 (that is, the first and second guide pipes 34 and 36) is formed in a closed cross-section, that is, a tubular shape. Since the lubricating oil does not leak on the way, the lubricating oil easily flows in from the oil inlet portion 38 having a large cross-sectional area, and the oil outlet portion 40 has a sectional area smaller than that of the oil inlet portion 38. Since it is formed small, the velocity energy of the lubricating oil in the oil garter 32 can be increased and the lubricating oil can be efficiently supplied into the differential case 10.

In this embodiment, as shown in FIG. 5, the oil inlet portion 38 of the oil garter 32 may be arranged on the side surface around the final ring gear 8.

[0025]

[Effect of the device]

 As is clear from the above detailed description, according to the present invention, the oil guide body for guiding the lubricating oil scraped up by the rotation of the final ring gear to the lubrication necessary portion is formed in a closed cross-sectional shape and the oil inlet portion of the oil guide body is formed. Since the oil is disposed around the final ring gear so as to face the direction of the lubricating oil flow, the lubricating oil does not leak from the oil guide body, and moreover, the lubricating oil is pressure-fed by the velocity energy of the lubricating oil. It can be efficiently supplied to lubrication points.

[Brief description of drawings]

FIG. 1 is a sectional view of a differential lubrication device.

FIG. 2 is a front view of a differential lubrication device.

3 is a cross-sectional view taken along the line 〓-〓 in FIG.

4 is a cross-sectional view taken along the line 〓-〓 in FIG.

FIG. 5 is a partial cross-sectional view of a differential lubrication device according to another embodiment of the present invention.

[Explanation of symbols]

 2 Differential 4 Final deceleration part 6 Differential part 8 Final ring gear 10 Differential case 32 Oil gutter 34 First oil guide pipe 36 Second oil guide pipe 38 Oil inlet part 40 Oil outlet part

Claims (1)

[Claims for utility model registration] [Claim 1] In a differential lubrication device that supplies lubricating oil that is scraped up by rotation of a final ring gear fixed to a differential case to a lubrication required location, scraped up by rotation of the final ring gear An oil guide body that guides the lubricating oil to a lubrication required portion is formed in a closed cross-sectional shape, and an oil inlet portion of the oil guide body is arranged around the final ring gear so as to face the direction of the lubricating oil flow. Differential lubricator.