JPH0280816A - Lubricating device for ball bearing and extension housing bearing part - Google Patents

Abstract

PURPOSE:To obtain smooth lubrication and lengthen the life span of a ball bearing by fixing an annular seal piece to an outer race of the ball bearing, thereby forming a space by means of an oil seal and the annular seal piece. CONSTITUTION:A ball bearing 23 is formed by an inner race, which is fixed to an output shaft 22, an outer race, which is fixed to an extension housing 9, and a rolling member 34, which is arranged between both races 33 and 31. An annular seal piece 40 is fixed to the outer race 31, and, with the aid of an oil seal 36, a space 41 for lubricating oil is formed between the seal piece 40 and the rolling member 34. Oil is supplied from a radial hole 39 to the space 41 and scattered as the output shaft 22 rotates. Then, the lubricating oil goes round sufficiently to the every internal part of the ball bearing 23. Thus, smooth lubrication can be obtained, thereby lengthening the life span of the ball bearing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a lubricating device for a pole bearing and an extension housing bearing portion provided at a rear stage of a gear change mechanism of an automatic transmission.

(Prior Art) Conventionally, as shown in FIG. 5, an automatic transmission 1 includes a torque converter 2, a transmission gear mechanism 3, and a hydraulic control device 5, each of which has a converter housing 6, a case 7, and an extension housing. 9. Pulp body 1
0 and oil pan 11.

The torque converter 2 is equipped with a rotary clutch 12 for improving power transmission efficiency, and the rotary power of the input member 13 is transmitted indirectly through the oil flow within the torque converter 2 or When the clutch 12 is engaged, the signal is directly transmitted to the input shaft 15 of the transmission gear mechanism 3.

Further, the speed change gear mechanism 3 has an overdrive planetary gear unit 17 and a main speed change unit 21 consisting of a front planetary gear unit 19 and a rear planetary gear unit 20.

By the way, the extension housing 9 is located at the rear of the transmission case 7 and includes a ball bearing 23 that supports an output shaft 22 that takes out the power changed by the speed change gear mechanism 3. The ball bearing 23 is supplied with lubricating oil like other rotating elements.

The lubricating oil is supplied to the extension housing 9 through the axial oil passage 24 in the output shaft 22 after regulating the hydraulic pressure generated by the oil pump in the secondary regulator valve. Then, it passes through the radial hole 25,
The oil is supplied to the ball ring 23 through an annular oil passage 27 formed between the output shaft 22 and the vehicle speed detection gear 26, and further through a radial hole 28.

Here, as shown in FIG. 3, the ball ring 23 has an outer race 31 fixed to the extension housing 9, an inner race 33 fixed to the output shaft 22, and a space between the outer race 31 and the inner race 33. A rolling member 34 is accommodated therein. In order to efficiently distribute the lubricating oil supplied through the radial hole 28 to each part of the ball hair ring 23, a seal member 35 and an oil seal 36 are provided with the ball hair ring 23 sandwiched therebetween. be done.

As shown in FIG. 4, the sealing member 35 is composed of an annular body having an 11-shaped cross section with a circular hole 35' formed in the center, and the inner peripheral edge of the circular hole 35' is close to the output shaft 22. The extension housing 9 is fitted into the extension housing 9 as shown in FIG.

Therefore, both end surfaces of the ball bearing 23 are surrounded by the seal member 35 and the oil seal 36 to form a space 37. As the output shaft 22 rotates, the lubricating oil in the space 37 is scattered by centrifugal force and spreads to each part of the ball hair ring 23 for efficient lubrication.

Note that the third piece is a fixing piece that fixes the ball ring 23 to the output shaft 22.

(Problem to be Solved by the Invention) However, in the conventional ball bearing 23 and the lubrication device described above, the seal member 35 is fitted into the inner periphery of the extension housing 9 and fixed, so it is difficult to improve workability. I can't say that, and the installation after fitting was not good either.

Furthermore, during the fitting operation, scraped pieces may be generated from the inner circumferential portion of the seal member 35 or the extension housing 9, and these scraped pieces may enter the ball ring 23 during operation of the automatic transmission. If it digs into the ball, it may damage the rolling member 34 of the ball ring 23 or accelerate wear.

The present invention solves the problems of the conventional ball hair ring and extension housing bearing lubricating device, and provides a ball hair ring that can easily form a space in which lubricating oil is accommodated between the ball hair ring and the oil seal. The purpose of the present invention is to provide a ring to prevent deterioration of ball bearings due to the occurrence of shavings, etc.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a ball bearing with an inner race fixed to a rotating shaft, an outer race fixed to the bearing, and a rotatable structure between the two. An annular seal piece is fixed to the outer race, and the annular seal piece is extended to the vicinity of the inner race to seal one end surface of the bearing.

In addition, when the above ball hair ring is applied to an automatic transmission, an oil seal and a ball hair ring are installed in parallel between the output shaft of the transmission gear mechanism of the automatic transmission and the extension housing, and the inner race of the ball bearing is is fixed to the output shaft, and the outer race is fixed to the extension housing.

In this case, the outer race is fixedly provided with an annular seal piece that extends to the vicinity of the inner race and seals the end face on the side far from the oil seal, and is surrounded by the oil seal and the annular seal piece. An oil passage is formed to send lubricating oil to the space.

(Operations and Effects of the Invention) According to the present invention, the annular seal piece is fixed to the outer race of the ball hair ring as described above, and a space is formed by the oil seal and the annular seal piece, and the space is lubricated. Since an oil passage is formed to send oil, the lubricating oil is efficiently distributed to each part of the ball hair ring as the output shaft rotates, so that lubrication is performed smoothly.

Since the annular seal piece described in "-" is installed before attaching the ball hair ring to the output shaft, it improves assembly work efficiency and eliminates the occurrence of scraped pieces during assembly. The lifespan of the ring will be shortened.

(Embodiments) Hereinafter, embodiments of a ball bearing and an extension housing bearing portion lubricating device of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a lubricating device for an extension housing bearing portion of the present invention, FIG. 2(a) is a sectional view of a ball bearing of the present invention, and FIG. 2(b) is a sectional view of another embodiment of the present invention. FIG. 3 is a cross-sectional view of a ball bearing.

In the figure, the power that has been changed in speed by the speed change mechanism of the automatic transmission is output to an output shaft 22. An axial oil passage 24 is provided in the center of the output shaft, and lubricating oil is formed between the output shaft 22 and the vehicle speed detection gear 26 from the axial oil passage 24 through a radial hole 25. The ball hair ring 23
is supplied to

Here, the ball bearing 23 is composed of an outer race 31 fixed to the extension housing 9, an inner race 33 fixed to the output shaft 22, and a rolling member 34 accommodated between the outer race 31 and the inner race 33. be done. In order to efficiently distribute the lubricating oil supplied through the radial holes 39 to each part of the ball hair ring 23, an oil seal 36 is disposed on one end side of the ball bearing 23, and An annular seal piece 40 is fixed to the outer lace 31 of the hair ring 23.

The annular seal piece 40 is arranged together with the oil seal 36 so as to form a space 41 for lubricating oil between the rolling member 34 and is made of a substantially flat annular piece,
The inner circumferential side protrudes outward from the ball bearing compared to the outer circumferential side.

Oil is supplied to the space 41 formed as described above from the radial hole 39 formed in the inner race 33 of the ball hair ring 23, and when it scatters as the output shaft 22 rotates, it lubricates the inside of the ball bearing 23. Sufficient oil is distributed for smooth lubrication.

Radial hole 39 for supplying lubricating oil to the space 41
is formed between the rolling member 34 and the oil seal 36 in FIG. 2(a), but as shown in FIG. 2(b), the radial hole 42 is formed between the rolling member 34 and the annular seal piece. It may be provided between 40 and 40.

Note that the present invention is not limited to the above embodiments,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a lubricating device for an extension housing bearing portion of the present invention, FIG. 2(a) is a sectional view of a ball hair ring of the present invention, and FIG. 2(b) is a sectional view of another embodiment of the present invention. 3 is a sectional view of a conventional ball bearing, FIG. 4 is a perspective view of a sealing member of a conventional ball bearing, and FIG. 5 is an overall sectional view of a conventional automatic transmission. . 1... automatic transmission, 2... torque converter, 3...
...Transmission gear mechanism, 5...Hydraulic control device, 6...Converter bousing, 7...Transmission case, 9...Extension housing, 10...
Valve body, 11... Oil pan, 12... Lock-up clutch, 13... Input member, 15... Input shaft, 17... Overdrive planetary gear unit, 21... Main transmission unit, 22...output shaft, 2
3... Ball bearing, 24... Axial oil path, 2
5.28.39.42... Radial hole, 26... Vehicle speed detection gear, 27... Annular oil passage, 31... Outer race, 33... Inner race, 34... Rolling member , 35... Seal member, 36... Oil seal, 37. 41... Space, 40... Annular seal piece. Patent applicant: Aisin AW Co., Ltd.
given name)

Claims (2)

[Claims] (1) An inner race fixed to the rotating shaft, an outer race fixed to the bearing, a rolling member rotatably disposed between the two, and a rolling member fixed to the outer race and extending to the vicinity of the inner race and fixed to the bearing. A ball bearing consisting of an annular seal piece that seals the end face. (2) An oil seal and a ball bearing are installed in parallel between the output shaft of the transmission gear mechanism of the automatic transmission and the extension housing, the inner race of the ball bearing is fixed to the output shaft, and the outer race is attached to the extension housing. At the same time, an annular seal piece is fixed to the outer race that extends to the vicinity of the inner race and seals the end face on the side far from the oil seal, and a ring-shaped seal piece is fixed to the outer race, and a ring-shaped seal piece is fixed to the outer race, and a ring-shaped seal piece is fixed to the outer race to seal the end face on the side far from the oil seal. A lubricating device for an extension housing bearing, characterized in that an oil passage for sending lubricating oil is formed.