JPH02163558A - Lubrication structure of one-way clutch - Google Patents

Abstract

PURPOSE:To secure the lubrication of a one-way clutch by forming a lubrication oil hole onto an inner race and fixing a seal plate onto an outer race and setting the inside diameter of the seal plate slightly smaller than the outside diameter of the inner race. CONSTITUTION:The oil jetted into a case 1 is supplied onto the sliding surface of a one-way clutch F1 by a centrifugal force from a lubricating oil hole 17 an inner race 3. Since in this case, the inside diameter (d) of seal plate 19 is set slightly smaller than the outside diameter D of the sliding surface of the inner race 16, the oil is stored in a space formed by the seal plate 19, and the lubrication state of the sliding surface of the inner race 16 is secured. Therefore, the sliding surface of the one-way clutch F1 is always kept in the lubrication state by the simple structure requiring a small space, and even in the case when the one-way clutch F1 is arranged outside in the radial direction in the transmission case 1, the lubrication of the one-way clutch F1 can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to automatic transmissions, and more particularly to a lubrication structure for a one-way clutch in which an innerless clutch rotates.

[Conventional technology]

Conventionally, in F-F type automatic transmissions, it is advantageous to arrange the rotating shaft of the automatic transmission so that it extends in the width direction of the vehicle, but since there is a limit to the width of the vehicle, the shaft of the automatic transmission There are many advantages to making the length in the direction as short as possible. Therefore, various proposals have been made to shorten the length in the axial direction. For example, the length of the automatic transmission in the axial direction is shortened by arranging the gears, clutches, and brakes not in parallel in the axial direction, but in a stacked manner in the radial direction. As a result, there are cases where the one-way clutch is disposed radially outward, away from the rotating shaft.

[Problem to be solved by the invention]

Incidentally, in a one-way clutch in which an inner race rotates, lubricating oil is supplied by centrifugal force from an oil passage in a rotating shaft of an automatic transmission for lubrication. However, when the one-way clutch is disposed on the outside in the radial direction within the transmission case, there is a problem in that it is difficult to secure a lubrication path. As a result, when the one-way clutch overruns, the sliding speed between both races and sprags (or rollers) is high, causing the problem that the sliding members are likely to wear out if sufficient lubrication is not provided. .

The present invention solves the above problem and aims to ensure lubrication of the one-way clutch even when the one-way clutch is disposed radially outside within the transmission case.

[Failure to solve the problem]

For this purpose, the lubrication structure of the one-way clutch of the present invention is
In the one-way clutch F1, which is composed of an outer race 15 arranged to be rotatable or fixed, an inner race 16 rotatably supported, and a rotation regulating member provided between these races, the inner race 16 is lubricated. A hole 17 is formed, and a seal plate 19 for sealing the one-way clutch is fixed to the inner surface of the outer race 15, and the inner diameter d of the seal plate 19 is equal to the outer diameter of the sliding surface of the inner race 16. It is characterized by being slightly smaller than the original size.

Note that the numbers added to the above configurations are for comparison with the drawings, and the configurations are not limited thereby.

[Operation and Effects of the Invention] In the present invention, oil injected into the case is supplied to the sliding surface of the one-way clutch F by centrifugal force from the lubricating hole 17 of the inner race IG.

At this time, since the inner diameter d of the seal plate 19 is designed to be slightly smaller than the outer diameter of the sliding surface of the inner race 16, the oil is accumulated in the space formed by the seal plate 19. The lubrication state of the sliding surface of the inner race 16 is guaranteed.

Therefore, according to the present invention, the seal plate is provided on the outer race of the one-way clutch, which is a simple structure that can be achieved in a small space, so that the sliding surfaces of the one-way clutch can be kept lubricated at all times, and the one-way clutch is connected to the transmission. Lubrication of the one-way clutch can be guaranteed even when it is arranged radially outward in the case.

(Examples) Examples of the present invention will be described below with reference to the drawings.
The figure shows one embodiment of the lubrication structure of the one-way clutch of the present invention.

The figure shows a part of an automatic transmission mechanism, in which an input shaft 3 and a hollow shaft 5 are rotatably supported in a transmission case 1.2. The planetary gear unit 10 consists of a single planetary gear unit 12 and a dual planetary gear unit 13, and the single planetary gear unit 12 includes a sun gear SI formed on a hollow shaft 5, a ring gear R1, and a carrier that supports a first pinion P1 that meshes with these gears. CR, and the dual-plane gear connector 12 has a second pinion P2 and a third pinion P (not shown), and the second pinion P2 is composed of SANGI+S, and third pinion P3
The third pinion P3 meshes with the second pinion P2 and the ring gear R2, and the carrier CR+ supports these gears so as to mesh with each other. In both gear units 12 and 13, the sun gears 81 and the carriers CR are integrally connected.

Further, the input shaft 3 is connected to a ring gear R of the single planetary gear unit 12 via a first clutch CI, and is also connected to a ring gear R via a second clutch C2 and a one-way clutch F1. Further, the input shaft 3 is connected to a ring gear R2 of the dual planetary gear unit 13 via a third clutch C0, and the ring gear R2 can be fixed to the transmission case 1 by a brake B.

Next, the lubrication structure of the one-way clutch, which is a feature of the present invention, will be explained.

The one-way clutch F1 includes an outer race 15 that is rotated or fixed by a second clutch C2, and an input shaft 3.
The inner race 16 is rotatably supported by the inner race 16, and a one-way rotation regulating member such as a sprag (not shown) provided between the two races. A ring gear R1 is formed inside the inner race 16, and a plurality of lubrication holes 17 are formed obliquely in the radial direction. Further, ring-shaped seal plates 19 and 19 are fixed to both sides of the one-way clutch F on the open side inside the outer race 15. The inner diameter d of this seal plate 19 is designed to be slightly smaller than the outer diameter of the sliding surface of the inner race 16.

” The function of the lubrication structure of the one-way clutch will be explained in Section 2.

Oil from the valve body is transferred to transmission case 2.
The oil is supplied to an oil passage 20 formed in the axial direction of the input shaft 3 and an oil passage 21 formed in the axial direction of the input shaft 3, and is further injected into the case from an oil passage 22 due to centrifugal force caused by the rotation of the input shaft 3. The oil injected into the case lubricates the thrust bearing 23 and is supplied to the sliding surface of the one-way clutch F through the lubricating hole 17 of the inner race 16 by centrifugal force.

At this time, since the inner diameter d of the seal plate 19 is designed to be slightly smaller than the outer diameter of the sliding surface of the inner race 16, oil accumulates in the space formed by the seal plate 19. The lubrication state of the sliding surface of the inner race 16 is guaranteed.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made.

For example, in the above embodiment, one-way clutch F1
Two seal plates 19 are fixed to both sides of the open side of the clutch, but only one seal plate is required when one side of the one-way clutch F1 is closed by the engaging member of the clutch C7.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of a one-way clutch lubrication structure according to the present invention. F...One-way clutch, 3...Input shaft, 15
...Outer lace, 16...Inner lace, 1
7... Lubrication hole, 19... Seal plate. Applicant: Aisin AW Co., Ltd. Representative Patent Attorney Hiroki Shirai (5 others) Procedural amendment (voluntary) February 8, 1999 2. Title of invention: One-way clutch lubricating device 3. Patent applicant address 10 Takane, Fujii-cho, Anjo City, Aichi Prefecture Name Aisin AW Co., Ltd. Representative Shuzo Moroto 4, Agent 5 Date of amendment order None 6, increased due to amendment Number of claims: None 7, Title of the invention column, Scope of claims, Detailed explanation of the invention, and Brief explanation of drawings column 8 of the specification subject to amendment, Contents of amendment, □Executed] F-axe 1, Contents of amendment ■3 The name of the invention is corrected to "lubricating device for one-way clutch." 2. The claims are amended as follows. [(1) In a one-way clutch consisting of an outer race arranged to be rotatable or fixed, an inner race rotatably supported, and a rotation regulating member provided between these races, the inner race is lubricated. A hole is formed, and a seal plate for sealing the one-way clutch is fixed to the inner surface of the outer race, and the inner diameter of the seal plate I is slightly smaller than the outer diameter of the sliding surface of the inner race. A lubricating device for a one-way clutch that is characterized by its small size. "3, page 1, line 1, line 3, line 14, page 5, line 9, page 6, line 20, page 7, line 14, and page 8, lines 18 to 19. Correct the written "structure" to "device".

Claims (1)

[Claims] (1) In a one-way clutch consisting of an outer race that is rotatably or fixedly arranged, an inner race that is rotatably supported, and a rotation regulating member that is provided between these races, the inner race has a lubrication hole. A seal plate for sealing the one-way clutch is fixed to the inner surface of the outer race, and the inner diameter of the seal plate is slightly smaller than the outer diameter of the sliding surface of the inner race. A one-way clutch lubrication structure featuring: