JP2604144Y2 - Inboard wet brake lubrication system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for an inboard wet brake provided in an industrial vehicle or the like.

[0002]

2. Description of the Related Art As shown in FIG.
There is one equipped with a semi-floating axle b provided with a differential a in the center. The semi-floating axle b has a wet brake c on both sides of a differential a, and a differential case d of the differential a and a wet brake c in the wet brake c.
And a bearing h which supports the output shaft g of the reduction gear f, and is communicated with each other through the casting hole e formed at the time of casting the lubricating oil in the differential case d. By entering and exiting through the bearing h
Is cooled.

[0003]

However, in the above-mentioned conventional wet brake c, when the reduction gear f rotates in the differential case d, the lubricating oil in the differential case d is drawn in one direction, and the left and right wet brake c is driven. In the wet brake side where the oil level is low, there were problems such as early wear of the disk i and seizure of the brake disk due to lack of lubricating oil. In addition, since there is no place for precipitating metal abrasion powder and foreign matter mixed in the lubricating oil, these abrasion powder and foreign matter are reduced by the reduction gear f, the bearing h,
There is also a problem that the wet brake c is caught by the brake disc i or the like, thereby shortening the service life of the brake.
The present invention has been made to improve the above-mentioned conventional problems, and provides an inboard wet brake lubrication device capable of averaging the oil level of the left and right wet brakes to prevent wear and seizure of the wet brakes. It is the purpose.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a semi-floating axle for a vehicle having a differential case filled with lubricating oil in the center and an inboard wet brake on both sides thereof. In the above, the left and right brake chambers of the wet brake are communicated with each other by an oil passage formed below a differential case at a bottom wall of the differential chamber and separated from the differential chamber.

[0005]

With the above construction, even if the lubricating oil in the differential case moves in one direction due to the rotation of the reduction gear, oil is supplied to the brake chamber on the opposite side via the oil passage, and the oil passage is provided in the differential machine room. Since the bottom wall is separated from the differential machine room, the lubricating oil can be recirculated from one brake chamber to the other brake chamber without being affected by rotation of the ring gear. Therefore, since the oil levels in the left and right brake chambers are averaged, it is possible to prevent a problem such as abnormal wear or seizure of one wet brake due to lack of lubricating oil.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. 2 is a cross-sectional view of a semi-floating axle provided with an inboard wet brake, FIG. 3 is a front view of the same, and FIG. 4 is a cross-sectional view of an oil passage 2g of a differential case 2a passing through left and right brake chambers. In these figures, reference numeral 1 denotes a semi-floating axle, in which a differential 2 is provided in the center and a wet brake 3 is provided on both sides thereof.

The differential 2 has a drive pinion 2b attached to an end of an input shaft 4 in a differential case 2a.
A reduction gear 2c meshing with the pinion 2b, a differential pinion 2e rotatably supported by a differential box 2d attached to the reduction gear 2c, and a side gear 2f meshing with the differential pinion 2e. A brake disk 3a of the wet brake 3 is mounted on the output shaft 5 to which 2f is mounted, and an inner ring 3b and an outer ring 3c are provided on both sides of the brake disk 3a, and these rings 3b, 3c Is pressed against the brake disc 3a by the piston 3d, whereby the output shaft 5 can be braked.

The brake chamber 3f of the wet brake 3
A power reducer 6 composed of a planetary gear mechanism is housed therein, and power is transmitted from the output shaft 5 of the differential 2 to the axle 7 via the speed reducer 6. An oil passage formed in the brake chamber 3f of the left and right wet brakes 3 provided on both sides of the motive machine 2 is formed below the differential machine case 2a of the differential machine 2 by being separated from the differential machine chamber 12 by a bottom wall 10 of the differential machine chamber. They are communicated with each other by 2 g. The oil passage 2g is formed by piercing the inside of the differential case 2a, and is separated from the inside of the differential case 2a.

Next, the operation will be described. The power input to the differential 2 from the input shaft 4 is transmitted to the output shaft 5 through a gear train in the differential box 2d, and further transmitted through the reduction gear 6 to the axle. 7, and the wheels (not shown) attached to the axle 7 are driven.

A lubricating oil is contained in the differential case 2a, and the lubricating oil is cast in the same manner as in the prior art, such as a casting hole 2i, a bearing 8 for supporting the output shaft 5, and a carrier for supporting the bearing 8. When the lubricating oil in the differential case 2a moves in one direction due to rotation of the reduction gear, the inside of the brake chamber 3f of the left and right wet brake 3 is communicated with each other by the oil passage 2g. Therefore, the oil levels in these brake chambers 3f are always averaged, so that only the brake disc 3a of one wet brake 3 can be prevented from being worn or seized.

Further, since the metal wear powder and foreign matter mixed in the lubricating oil settle and accumulate in the oil passage 2g, they do not bite into the reduction gear 2c, the bearing 8 and the brake disk 3a.

[0012]

As described in detail above, the present invention provides an oil passage formed at the bottom of the differential case and separated from the differential room by the bottom wall of the differential room. Because the brakes communicate with each other in the brake chamber, the oil level in the brake chamber is averaged by the oil passage even if the lubricating oil in the differential case goes in one direction due to the rotation of the reduction gear. Problems such as early wear and seizure of the brake disc of the wet brake can be eliminated. In addition, since metal wear powder and foreign matter mixed in the lubricating oil settle and accumulate in the oil passage, problems such as a shortening of the life of the differential gear and the brake disk due to the metal wear powder and the like are also solved. be able to.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an inboard wet brake provided on a conventional semi-floating axle.

FIG. 2 is a cross-sectional view of an anti-floating axle provided with an inboard wet brake according to an embodiment of the present invention.

FIG. 3 is a front view of a semi-floating axle provided with an inboard wet brake according to an embodiment of the present invention.

FIG. 4 shows a differential case 2a communicating the left and right brake chambers.
It is sectional drawing of 2 g of oil paths.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Semi-floating axle 2 Differential machine 2a Differential machine case 2f Differential gear 2g Oilway 3 Wet brake 3f Brake room 10 Bottom wall 12 Differential machine room

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16H 57/00-57/04 B60K 17/16 F16D 65/853

Claims (1)

(57) [Scope of request for utility model registration] 1. A case (2) in which lubricating oil is sealed in the center.
a) and inboard wet brakes on both sides
In the semi-floating axle (1) of the vehicle provided with (3) ,
The wet brake (3) of the left and right brake chamber in (3f), the differential in the lower portion of the differential gear case differential gear (2) (2a)
Separated from the differential machine room (12) at the bottom wall (10) of the machine room
A lubricating device for an inboard wet brake, wherein the lubricating device communicates with each other through an oil passage (2g) formed as described above .