CN107850204B - Lubrication structure for transmission and transmission - Google Patents
Lubrication structure for transmission and transmission Download PDFInfo
- Publication number
- CN107850204B CN107850204B CN201680042475.4A CN201680042475A CN107850204B CN 107850204 B CN107850204 B CN 107850204B CN 201680042475 A CN201680042475 A CN 201680042475A CN 107850204 B CN107850204 B CN 107850204B
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- Prior art keywords
- shaft
- transmission
- thrust washer
- inner ring
- annular
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
- Rolling Contact Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
A lubrication structure of a transmission (1) provided with transmission gears (15), (16) on a shaft (10) having a lubrication oil passage capable of injecting lubrication oil in a radial direction, comprising: a bearing section (30) having an inner ring (32) provided on the outer periphery of the shaft (10) so as to be non-rotatable, an outer ring (31) provided on the transmission case so as to be non-rotatable, and rollers (33) provided slidably between the inner ring (32) and the outer ring (31); and an annular thrust washer (40) inserted on the shaft (10) and disposed between the bearing portion (30) and the transmission gear (15); an annular protrusion (44) is provided on a side surface of the thrust washer (40), and the annular protrusion (44) protrudes in the axial direction toward the roller (33).
Description
Technical Field
The present invention relates to a lubrication structure of a transmission and a transmission, and more particularly to a thrust washer disposed between a transmission gear and a bearing.
Background
Conventionally, in a transmission, in order to reduce friction occurring in a plurality of transmission gear trains, bearings, and the like, lubricating oil is supplied to each part in a transmission case. As such a lubrication structure, for example, the following techniques are known: lubricating oil is radially injected from a lubricating oil passage formed inside the main shaft, and the lubricating oil is supplied to adjacent bearings from radial oil grooves formed in side surfaces of the thrust washers (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese Kokai publication Sho-60-110760
Disclosure of Invention
Problems to be solved by the invention
Further, since the thrust washer rotates integrally with the main shaft, the lubricating oil supplied from the radial oil groove of the main shaft to the bearing is subjected to a centrifugal force. Therefore, if the lubricating oil is scattered outward from the radial oil grooves of the thrust washer by the influence of the centrifugal force, a sufficient amount of the lubricating oil cannot be supplied to the bearing, and particularly, there is a problem that oil film shortage occurs on the contact surface between the inner ring flange portion of the bearing and the roller, and burning occurs at these portions.
The purpose of the technique of the present invention is to effectively suppress scattering of lubricating oil and prevent seizure of a bearing. Means for solving the problems
The present invention provides a lubrication structure for a transmission provided with a speed change gear on a shaft having a lubrication oil passage capable of injecting a lubricating oil in a radial direction, the lubrication structure including: a bearing portion having an inner ring provided on an outer periphery of the shaft so as to be non-rotatable, an outer ring provided on a transmission case so as to be non-rotatable, and rollers provided slidably between the inner ring and the outer ring; and an annular thrust washer inserted into the shaft and disposed between the bearing portion and the transmission gear, wherein an annular protrusion protruding toward the roller in an axial direction is provided on a side surface of the thrust washer.
The annular projection may extend between the inner ring and the outer ring, and a protruding end of the annular projection may be adjacent to a side surface of the roller.
The injection port of the lubricating oil passage may be provided on an outer peripheral surface of the shaft facing the transmission gear, and a shaft oil groove extending from the injection port to the bearing portion in the axial direction may be provided in a recessed manner on the outer peripheral surface of the shaft, and a through oil groove extending from an inner ring portion thereof to the bearing portion in the axial direction and a radial oil groove extending from a downstream end of the through oil groove to the mount portion in the radial direction may be provided in a recessed manner on the thrust washer.
An annular oil groove formed by obliquely cutting off a side surface of the thrust washer facing the transmission gear toward the inner ring portion may be provided.
An annular inclined surface portion formed by obliquely cutting off a side surface facing the bearing portion toward an outer ring portion may be provided on the side surface of the thrust washer.
Further, an aspect of the present invention is a transmission including: a transmission housing; a shaft having a lubricating oil path for injecting lubricating oil in a radial direction; a speed change gear provided on the shaft; a bearing portion having an inner ring attached to an outer periphery of the shaft, an outer ring attached to the transmission case, and a roller sliding between the inner ring and the outer ring; and an annular thrust washer inserted in the shaft and disposed between the bearing portion and the transmission gear, the thrust washer having an annular protrusion protruding from a side surface in an axial direction toward the roller.
Effects of the invention
According to the technique of the present invention, scattering of the lubricating oil can be effectively suppressed to prevent the bearing from being burned.
Brief description of the drawings
Fig. 1 is a schematic cross-sectional view showing a part of a transmission according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view showing a part of a main shaft of a transmission according to an embodiment of the present invention.
Fig. 3 is a schematic front view of a thrust washer of an embodiment of the present invention as viewed from the cylindrical roller bearing side.
Fig. 4 is a sectional view taken along line a-a of fig. 3.
Fig. 5 is a diagram illustrating a flow of lubricating oil in a lubricating structure of a transmission according to an embodiment of the present invention.
Detailed Description
Hereinafter, a lubrication structure of a transmission according to an embodiment of the present invention will be described with reference to the drawings. The same reference numerals are used for the same parts, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
As shown in fig. 1, a main shaft 10 of the transmission 1 is rotatably supported on a transmission case 2 via a cylindrical roller bearing 30. A plurality of speed change gears 15 and 16 are rotatably supported by the main shaft 10 via needle bearings 3 and 4.
An axial oil passage 11 extending in the axial direction and through which the lubricating oil flows, and radial oil passages 12, 13 extending from the axial oil passage 11 in the radial direction toward the outer peripheral surface of the main shaft 10 and injecting the lubricating oil from an opening 12A (see fig. 2) in the outer peripheral surface are formed in the main shaft 10. These radial oil passages 12, 13 are provided at positions facing the inner peripheral surfaces (needle roller bearings 3, 4) of the transmission gears 15, 16, respectively, for example.
An axial outer circumferential oil groove 14 (see fig. 1 and 2) extending from the opening 12A (see fig. 2) in the axial direction toward a thrust washer 40 described in detail later is formed in the outer circumferential surface of the main shaft 10.
The synchromesh mechanism 20 includes: a synchronizer hub 21 having inner peripheral teeth spline-fitted to spline teeth 10A (see fig. 2) of the main shaft 10; a synchronizer coupling sleeve 22 which is constantly engaged with outer peripheral teeth of the synchronizer hub 21 and is shifted by a shift fork (not shown) so as to be selectively engaged with a dog gear 15A of the transmission gear 15; and a synchronizer ring 23 which is provided between the synchronizer hub 21 and the dog gear 15A and applies a synchronization load.
The cylindrical roller bearing 30 includes: the outer race portion 31, the inner race portion 32, and the cylindrical rollers 33 slidably sandwiched between the outer race portion 31 and the inner race portion 32.
The outer ring portion 31 has a pair of flange portions 31A, 31B protruding radially inward at both axial ends of its inner circumferential surface, the outer ring portion 31 is press-fitted and fixed into a mounting hole of the transmission case 2, the inner ring portion 32 is composed of two members, i.e., an annular 1 st flange portion 32A and an annular 2 nd flange portion 32B having a substantially L-shaped cross section, and the inner circumference of the inner ring portion 32 is fitted to the outer circumference portion 10B (see fig. 2) of the main shaft 10.
The thrust washer 40 is formed in a substantially annular shape in front view, is slidably inserted on the main shaft 10, and is disposed between the speed change gear 15 and the cylindrical roller bearing 30. Since the thrust washer 50 between the speed change gear 16 and the cylindrical roller bearing 30 is also configured similarly to the thrust washer 40, detailed description of the thrust washer 50 will be omitted below.
As shown in fig. 3 and 4, an annular shelf portion (annular projecting portion) 44 is provided to project from the thrust washer 40, and the shelf portion 44 projects from the 1 st side surface portion 40A on the cylindrical roller bearing 30 side at a predetermined height in the axial direction. The shelf portion 44 extends between the outer ring portion 31 and the inner ring portion 32 of the cylindrical roller bearing 30, and a slight clearance for avoiding interference is secured between the protruding end thereof and the side surface of the cylindrical roller 33.
A plurality of (4 in the illustrated example) radial oil grooves 45 extending from the inner ring portion 41 to the shelf portion 44 are provided in a recessed manner in the 1 st side surface portion 40A of the thrust washer 40. The 1 st side surface part 40A is provided with an annular inclined surface part 48 formed by obliquely cutting off the outer ring part 42 toward the 1 st side surface part 40A.
A plurality of (4 in the illustrated example) through oil grooves 46 that are recessed radially outward by a predetermined depth and axially penetrate the thrust washer 40 to communicate with the radial oil grooves 45 are provided in the inner ring portion 41 of the thrust washer 40. Further, the 2 nd side surface part 40B of the thrust washer 40 on the transmission gear 15 side is provided with an annular oil groove 47 (see fig. 4) formed by obliquely cutting the 2 nd side surface part 40B toward the inner ring part 41.
Next, the operational effects of the lubrication structure of the transmission according to the present embodiment will be described with reference to fig. 5.
In fig. 5, as indicated by a broken-line arrow X1, the lubricating oil flows through the axial oil passage 11 and the radial oil passage 12 of the main shaft 10, is ejected from the opening 12A (see fig. 2), and further flows into the thrust washer 40 in the shaft outer circumferential oil groove 14.
The lubricating oil reaching the downstream end of the shaft outer circumferential groove 14 passes through the through oil passage 46 and reaches the radial oil groove 45 as indicated by a broken line arrow X2 while circulating in the annular oil groove 47. The lubricating oil that has reached the radial oil groove 45 flows radially outward due to centrifugal force and hits the shelf portion 44, and is guided along the inner circumferential surface of the shelf portion 44 and guided between the outer ring portion 31 and the inner ring portion 32 of the cylindrical roller bearing 30.
That is, the lubricating oil supplied from the radial oil groove 45 is reliably stopped and guided by the frame portion 44 without scattering radially outward, and thus the lubricating oil is efficiently introduced into the cylindrical roller bearing 30. Therefore, according to the lubrication structure of the present embodiment, the supply amount of the lubricating oil to the cylindrical roller bearing 30 can be effectively ensured, and particularly, the oil film between the 1 st lip portion 32A and the cylindrical rollers 33, which are likely to cause the seizure, can be reliably prevented from running out.
As indicated by a broken-line arrow X3 in fig. 5, a part of the lubricating oil stirred up by the transmission gear 15 and the like in the transmission case 2 falls down toward the thrust washer 40, and is efficiently collected on the outer peripheral surface of the carrier portion 44 by the annular inclined surface portion 48. Further, the lubricating oil flows along the outer peripheral surface of the cage 44 and is efficiently introduced between the outer ring portion 31 and the inner ring portion 32 of the cylindrical roller bearing 30. Therefore, according to the lubrication structure of the present embodiment, the supply amount of the lubricating oil to the cylindrical roller bearing 30 can be effectively increased, and the seizure of the cylindrical roller bearing 30 can be reliably prevented.
The present invention is not limited to the above-described embodiments, and can be implemented by being appropriately modified within a range not departing from the gist of the present invention.
For example, the shaft is not limited to the main shaft 10, and can be widely applied to other shafts having a lubricating oil passage formed therein, such as a sub-shaft. The bearing is not limited to the cylindrical roller bearing 30, and can be widely applied to other bearings such as a ball bearing.
The present application is based on japanese patent application (japanese application 2015-143714) filed on 21/7/2015 and the content thereof is incorporated herein by reference.
Industrial applicability
The lubricating structure of a transmission and the transmission according to the present invention have an effect of effectively suppressing scattering of lubricating oil and preventing seizure of a bearing, and are useful in that a highly reliable transmission can be provided.
Description of the reference numerals
1 speed variator
2 Transmission housing
3. 4 needle roller bearing
10 spindle
11 axial oil passage
12. 13 radial oil path
14 shaft peripheral groove
15. 16 speed change gear
20 synchromesh mechanism
21 synchronizer gear hub
22 synchronizer coupling sleeve
23 synchronizer locking ring
30 cylindrical roller bearing
31 outer ring part
31A, 31B rib parts
32 inner ring part
32A 1 st rib part
32B No. 2 rib part
33 cylindrical roller
40 thrust washer
41 inner ring part
42 outer ring portion
44 frame part (Ring-shaped protrusion)
45 radial oil groove
46 through oil groove
47 annular oil groove
48 annular inclined plane part
Claims (8)
1. A lubrication structure of a transmission provided with a speed change gear on a shaft having a lubrication oil path capable of injecting a lubrication oil in a radial direction, comprising:
a bearing portion having an inner ring non-rotatably provided on an outer periphery of the shaft, an outer ring non-rotatably provided on a transmission case, and rollers slidably provided between the inner ring and the outer ring, and
an annular thrust washer inserted on the shaft and disposed between the bearing portion and the transmission gear;
an annular protrusion protruding toward the roller in an axial direction is provided on a side surface of the thrust washer,
the thrust washer is provided with a through oil groove penetrating an inner ring portion thereof in an axial direction and a radial oil groove extending from a downstream end of the through oil groove to the annular protrusion in a radial direction on a side surface facing the bearing portion.
2. The lubricating configuration of a transmission of claim 1,
the annular protrusion is extended between the inner ring and the outer ring, and a protruding end of the annular protrusion is adjacent to a side surface of the roller.
3. The lubricating configuration of a transmission of claim 1,
the injection port of the lubricating oil passage is provided on an outer peripheral surface of the shaft facing the transmission gear, and a shaft oil groove extending from the injection port to the bearing portion in the axial direction is provided in a recessed manner on the outer peripheral surface of the shaft.
4. The lubricating construction of a transmission according to claim 3,
an annular oil groove formed by obliquely cutting off a side surface of the thrust washer toward the inner ring portion is provided on the side surface facing the transmission gear.
5. The lubricating configuration of a transmission of claim 2,
the injection port of the lubricating oil passage is provided on an outer peripheral surface of the shaft facing the transmission gear, and a shaft oil groove extending from the injection port to the bearing portion in the axial direction is provided in a recessed manner on the outer peripheral surface of the shaft.
6. The lubricating construction of a transmission according to claim 5,
an annular oil groove formed by obliquely cutting off a side surface of the thrust washer toward the inner ring portion is provided on the side surface facing the transmission gear.
7. The lubricating structure of a transmission according to any one of claims 1 to 6,
an annular inclined surface portion formed by obliquely cutting off a side surface facing the bearing portion from an outer ring portion is provided on the side surface of the thrust washer.
8. A transmission, comprising:
the outer shell of the speed changer is provided with a speed changer,
a shaft having a lubricating oil path for injecting lubricating oil in a radial direction,
a speed change gear provided on the shaft,
a bearing part having an inner ring mounted on an outer periphery of the shaft, an outer ring mounted on the transmission case, and rollers sliding between the inner ring and the outer ring, and
an annular thrust washer inserted on the shaft and disposed between the bearing portion and the transmission gear;
the thrust washer has an annular projecting portion projecting from a side surface of the thrust washer in an axial direction toward the roller,
the thrust washer is provided with a through oil groove penetrating an inner ring portion thereof in an axial direction and a radial oil groove extending from a downstream end of the through oil groove to the annular protrusion in a radial direction on a side surface facing the bearing portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-143714 | 2015-07-21 | ||
| JP2015143714A JP6610051B2 (en) | 2015-07-21 | 2015-07-21 | Transmission lubrication structure |
| PCT/JP2016/070315 WO2017014077A1 (en) | 2015-07-21 | 2016-07-08 | Transmission and lubricating structure for transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107850204A CN107850204A (en) | 2018-03-27 |
| CN107850204B true CN107850204B (en) | 2020-07-17 |
Family
ID=57833917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680042475.4A Active CN107850204B (en) | 2015-07-21 | 2016-07-08 | Lubrication structure for transmission and transmission |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6610051B2 (en) |
| CN (1) | CN107850204B (en) |
| WO (1) | WO2017014077A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020026801A (en) * | 2018-08-09 | 2020-02-20 | いすゞ自動車株式会社 | Pump and lubrication structure of gear device |
| JP7131220B2 (en) | 2018-09-10 | 2022-09-06 | トヨタ自動車株式会社 | vehicle power transmission |
| CN111271440B (en) * | 2020-03-17 | 2024-04-05 | 重庆青山工业有限责任公司 | Shafting lubricating mechanism of automobile transmission |
| JP6894561B1 (en) | 2020-10-29 | 2021-06-30 | Ｔｐｒ株式会社 | Thrust washer |
| CN114909402B (en) * | 2021-02-07 | 2023-08-08 | 中国航发商用航空发动机有限责任公司 | Bearing and aeroengine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60110760U (en) * | 1983-12-29 | 1985-07-27 | トヨタ自動車株式会社 | Lubrication structure of gear transmission |
| JPH0828667A (en) * | 1994-07-21 | 1996-02-02 | Daihatsu Motor Co Ltd | Lubricating structure of power transmission device |
| JP2001090819A (en) * | 1999-09-22 | 2001-04-03 | Aisin Ai Co Ltd | Lubrication device for transmission |
| JP2002195391A (en) * | 2000-12-27 | 2002-07-10 | Aisin Aw Co Ltd | Planetary gear drive |
| CN1619189A (en) * | 2003-09-22 | 2005-05-25 | 爱信艾达株式会社 | Lubricating mechanism of oil pump |
| CN104728408A (en) * | 2013-12-24 | 2015-06-24 | 本田技研工业株式会社 | Lubrication structure for transmission |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6185768U (en) * | 1984-11-12 | 1986-06-05 | ||
| JP2015227682A (en) * | 2014-05-30 | 2015-12-17 | 日本精工株式会社 | Friction roller transmission |
-
2015
- 2015-07-21 JP JP2015143714A patent/JP6610051B2/en active Active
-
2016
- 2016-07-08 CN CN201680042475.4A patent/CN107850204B/en active Active
- 2016-07-08 WO PCT/JP2016/070315 patent/WO2017014077A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60110760U (en) * | 1983-12-29 | 1985-07-27 | トヨタ自動車株式会社 | Lubrication structure of gear transmission |
| JPH0828667A (en) * | 1994-07-21 | 1996-02-02 | Daihatsu Motor Co Ltd | Lubricating structure of power transmission device |
| JP2001090819A (en) * | 1999-09-22 | 2001-04-03 | Aisin Ai Co Ltd | Lubrication device for transmission |
| JP2002195391A (en) * | 2000-12-27 | 2002-07-10 | Aisin Aw Co Ltd | Planetary gear drive |
| CN1619189A (en) * | 2003-09-22 | 2005-05-25 | 爱信艾达株式会社 | Lubricating mechanism of oil pump |
| CN104728408A (en) * | 2013-12-24 | 2015-06-24 | 本田技研工业株式会社 | Lubrication structure for transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107850204A (en) | 2018-03-27 |
| JP2017025985A (en) | 2017-02-02 |
| JP6610051B2 (en) | 2019-11-27 |
| WO2017014077A1 (en) | 2017-01-26 |
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