CN112360590B - Camshaft bearing cap lubricating structure of sectional type rocking arm axle - Google Patents
Camshaft bearing cap lubricating structure of sectional type rocking arm axle Download PDFInfo
- Publication number
- CN112360590B CN112360590B CN202011329500.1A CN202011329500A CN112360590B CN 112360590 B CN112360590 B CN 112360590B CN 202011329500 A CN202011329500 A CN 202011329500A CN 112360590 B CN112360590 B CN 112360590B
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- Prior art keywords
- camshaft
- oil
- rocker arm
- camshaft bearing
- arm shaft
- Prior art date
- 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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- 230000001050 lubricating effect Effects 0.000 title claims abstract description 9
- 238000005461 lubrication Methods 0.000 claims abstract description 22
- 239000011148 porous material Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 117
- 239000010687 lubricating oil Substances 0.000 abstract description 14
- 208000035874 Excoriation Diseases 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/102—Lubrication of valve gear or auxiliaries of camshaft bearings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses a camshaft bearing cover lubricating structure of a sectional rocker shaft, which relates to the technical field of engines and comprises a middle camshaft bearing cover, wherein a camshaft mounting hole is formed in the rear plane of the middle camshaft bearing cover, a camshaft bearing communicating oil duct is formed in the hole wall of the camshaft mounting hole, a camshaft bearing bush is arranged in the camshaft mounting hole, a camshaft lubricating oil groove is formed in the inner wall of the camshaft bearing bush, a camshaft bearing bush oil inlet hole is formed in the camshaft lubricating oil groove, and the camshaft bearing bush oil inlet hole is communicated with the camshaft bearing communicating oil duct. According to the invention, oil is taken from the front rocker shaft oil duct and the rear rocker shaft oil duct, and finally enters the camshaft lubrication groove through the oil inlet hole of the camshaft bearing bush on the camshaft bearing bush, so that the camshaft journal is continuously and stably lubricated in the running process, the abrasion risk of the camshaft is reduced, and the running reliability of the camshaft is improved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a camshaft bearing cover lubricating structure of a sectional rocker shaft.
Background
The camshaft serves as an important component in the engine and serves to control the opening and closing of the valves. The main body of the camshaft is a cylindrical rod body with the length approximately the same as that of the cylinder group. A plurality of cams are sleeved on the upper surface and are used for driving the valve. The camshaft is supported in the camshaft bearing hole by the camshaft journal, so how many camshaft journals are important factors affecting the camshaft support rigidity. If the rigidity of the camshaft is insufficient, bending deformation occurs during operation, and the distribution timing is influenced. The thrust block camshaft bearing is formed by installing a camshaft bearing cover on an engine cylinder cover or a camshaft bearing seat of an overhead camshaft structure, and has the main functions that: the axial movement of the cam shaft is prevented by connecting the cam shaft bearing thrust end face with the cylinder cover to form a shaft hole for installing the cam shaft and matching the cam shaft thrust shoulder.
Currently, the relative motion of the camshaft and the camshaft bearings requires the provision of sufficient amounts of lubricating oil for lubrication in order to prevent dry friction and improve reliability. The traditional camshaft bearing thrust surface has no active lubrication oil way, and generally depends on oil mist in the top surface space of a cylinder cover to provide lubrication, so that the lubrication oil quantity is insufficient and uneven, and the lubrication effect is poor.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a camshaft bearing cover lubricating structure of a sectional rocker shaft, which aims to solve the problems that the thrust surface of the existing camshaft bearing has no active lubricating oil path, and the lubricating oil is usually supplied by depending on oil mist in the top surface space of a cylinder cover, so that the lubricating oil quantity is insufficient and uneven, and the lubricating effect is poor.
In order to achieve the above object, the present invention has the following technical scheme:
the utility model provides a camshaft bearing cap lubricating structure of sectional type rocking arm axle, includes middle camshaft bearing cap, middle camshaft bearing cap rear plane is provided with the camshaft mounting hole, be provided with camshaft bearing UNICOM oil duct on the pore wall of camshaft mounting hole, be provided with the camshaft axle bush in the camshaft mounting hole, be provided with camshaft lubrication groove on the camshaft axle bush inner wall, be provided with camshaft axle bush inlet port in the camshaft lubrication groove, camshaft axle bush inlet port is linked together with camshaft bearing UNICOM oil duct;
the front plane of the middle camshaft bearing cover is provided with a rocker shaft mounting hole, the hole wall of the rocker shaft mounting hole is provided with a front oil groove and a rear oil groove, one end in the front oil groove is provided with a front oil inlet channel, the other end is provided with a front oil passing bolt hole, and the front oil passing bolt hole is internally provided with a front oil passing channel and is communicated with a camshaft bearing communicating oil channel on the hole wall of the camshaft mounting hole; the one end is provided with the rear end oil inlet duct in the rear end oil groove, and its other end is provided with the rear end and crosses the bolt hole, the rear end is provided with the rear end in crossing the bolt hole and crosses the oil duct to be linked together with camshaft bearing UNICOM oil duct on the pore wall of camshaft mounting hole.
Preferably, the front oil groove and the rear oil groove are arranged in a splayed shape. Therefore, the contact surfaces of the front oil groove and the rear oil groove with the rocker shaft are more, and more lubrication is realized.
The invention has the beneficial effects that:
according to the camshaft bearing cover lubricating structure of the sectional rocker shaft, oil is taken from the oil duct of the rocker shaft and finally enters the camshaft lubricating oil groove through the oil inlet hole of the camshaft bearing bush on the camshaft bearing bush, so that oil is continuously and stably supplied to the camshaft journal for lubrication in the operation process, the abrasion risk of the camshaft is reduced, and the operation reliability of the camshaft is improved.
Drawings
FIG. 1 is a front view of a camshaft bearing cap lubrication structure for a segmented rocker shaft according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the F-F direction of FIG. 1;
FIG. 3 is a view of H-H of FIG. 2 rotated clockwise after cross-section;
FIG. 4 is a rear view of a camshaft bearing cap lubrication structure for a segmented rocker shaft according to an embodiment of the present invention;
FIG. 5 is a view of the mounting location of a camshaft bearing cap lubrication structure of a segmented rocker shaft on a cylinder cap, according to an embodiment of the present invention;
FIG. 6 is a diagram of a camshaft bearing cap lubrication structure for a segmented rocker shaft after the rocker shaft is installed, according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view taken along A-A of FIG. 6;
in the figure, a 1-cylinder head; 2-an intermediate camshaft bearing cap; 3-camshaft bearing bushes; 4-an oil passage on the cylinder cover; 5-covering an oil duct on a front camshaft bearing; 6-a front rocker shaft oil passage; 7-the front end rocker shaft passes through the oil duct; 8-the rear rocker shaft passes through the oil duct; 9-a rear rocker shaft oil passage; 10-covering an oil duct on a rear camshaft bearing; 11-front camshaft bearing caps; 12-rear camshaft bearing caps; 13-a front rocker shaft; 14-a rear rocker shaft; 15-a front-end rocker shaft oil passing bolt hole; 16-a rear end rocker shaft oil passing bolt hole; 17-a front end oil inlet duct; 18-a rear end oil inlet duct; 19-a front end oil groove; 20-a rear oil groove; 21-front end oil passing bolt holes; 22-rear end oil passing bolt holes; 23-a camshaft bearing cover communicating oil duct; 24-rocker shaft mounting holes; 25-camshaft mounting holes; 26-a camshaft lubrication groove; 27-a camshaft bearing bush oil inlet hole; 28-the front end passes through the oil duct; 29-rear end through the oil passage.
Detailed Description
To describe the technical contents, the achieved objects and effects of the present invention in detail, the following description is made with reference to the embodiments in conjunction with the accompanying drawings.
Example 1
Referring to fig. 1 to 7, the present invention provides a camshaft bearing cap lubrication structure of a sectional rocker shaft, which comprises a middle camshaft bearing cap 2, wherein a camshaft mounting hole 25 is formed in the rear plane of the middle camshaft bearing cap 2, a camshaft bearing communication oil duct 23 is formed on the wall of the camshaft mounting hole 25, a camshaft bearing bush 3 adapted to the inner wall of the camshaft mounting hole 25 is formed in the camshaft mounting hole 25, a camshaft lubrication groove 26 is formed in the inner wall of the camshaft bearing bush 3, a camshaft bearing bush oil inlet hole 27 is formed in the camshaft lubrication groove 26, and the camshaft bearing bush oil inlet hole 27 is communicated with the camshaft bearing communication oil duct 23;
the front plane of the middle camshaft bearing cap 2 is provided with a rocker shaft mounting hole 24, the wall of the rocker shaft mounting hole 24 is provided with a front oil groove 19 and a rear oil groove 20, a front oil inlet channel 17 is arranged in the front oil groove 19, a front oil passing bolt hole 21 is also arranged in the front oil groove 19, a front oil passing channel 28 is arranged in the front oil passing bolt hole 21, and the front oil passing channel is communicated with a camshaft bearing communicating oil channel 23 on the wall of the camshaft mounting hole 25; the rear oil groove is internally provided with a rear oil inlet duct 18 at one end and a rear passing bolt hole 22 at the other end, and a rear passing duct 29 is arranged in the rear passing bolt hole 22 and is communicated with a camshaft bearing communicating duct 23 on the wall of the camshaft mounting hole 25.
As shown in fig. 6 and 7, a front rocker arm shaft 13 and a rear rocker arm shaft 14 are provided on the cylinder head 1, the front rocker arm shaft 13 is mounted on the front cam shaft bearing cover 11 and the middle cam shaft bearing cover 2, the rear rocker arm shaft 14 is mounted on the rear cam shaft bearing cover 12 and the middle cam shaft bearing cover 2, one end of each of the front rocker arm shaft 13 and the rear rocker arm shaft 14 is mounted on the middle cam shaft bearing cover 2, the front rocker arm shaft 13 and the rear rocker arm shaft 14 are coaxially arranged, a front rocker arm shaft oil passage 6 is axially arranged in the front rocker arm shaft 13, the front rocker arm shaft oil passage 6 penetrates through the front rocker arm shaft 13, a front rocker arm shaft oil passing bolt hole 15 is formed on the outer wall of the front rocker arm shaft 13 opposite to a front end oil groove 19 on the rocker arm shaft mounting hole 24, a rear rocker arm shaft oil passage 9 is axially arranged in the rear rocker arm shaft 14, and a rear rocker arm shaft oil passing through passage 16 is formed on the outer wall of the rear rocker arm shaft 14 opposite to the rear end oil groove 20 on the rocker arm shaft mounting hole 24; the front camshaft bearing cap 11 is internally provided with a front camshaft bearing cap upper oil duct 5, and the rear camshaft bearing cap 12 is internally provided with a rear camshaft bearing cap upper oil duct 10; the cylinder cover 1 is provided with a cylinder cover upper oil duct 4 which is respectively communicated with a front camshaft bearing cover upper oil duct 5 and a rear camshaft bearing cover upper oil duct 10, the front camshaft bearing cover upper oil duct 5 is communicated with a front rocker shaft oil duct 6, and the rear camshaft bearing cover upper oil duct 10 is communicated with a rear rocker shaft passing oil duct 9;
when the structure works, the circulation route of the lubricating oil is as follows: the lubricating oil is divided into two paths through the cylinder head upper oil duct 4, and respectively enters the front camshaft bearing cover upper oil duct 5 and the rear camshaft bearing cover upper oil duct 10, wherein one path enters the front rocker shaft oil duct 6 through the front camshaft bearing cover upper oil duct 5, then flows into the front oil groove 19 through the front rocker shaft oil passing through oil duct 7, flows into the camshaft bearing cover communicating oil duct 23 through the front rocker shaft oil passing through bolt hole 15, and then flows into the camshaft bearing cover communicating oil duct 23 through the front oil passing through passage 28 of the front oil passing through bolt hole 21; the other route of lubricating oil flows into the rear rocker shaft oil duct 9 from the cam shaft bearing cover upper oil duct 10, then flows into the rear oil groove 20 through the rear rocker shaft oil passing hole 16 after passing through the rear rocker shaft oil passing duct 8, then flows into the cam shaft bearing cover communicating oil duct 23 through the rear oil passing duct 29 of the rear oil passing hole 22; the two routes of the lubricating oil finally meet in the camshaft bearing cover communication oil duct 23 on the wall of the camshaft mounting hole 25, and then the lubricating oil in the camshaft bearing cover communication oil duct 23 flows into the camshaft lubricating oil groove 26 through the camshaft bearing bush oil inlet hole 27 to lubricate the camshaft.
From the above, the front rocker arm shaft 13 and the rear rocker arm shaft 14 serve as oil ducts of the middle camshaft bearing cap 2 for conveying lubricating oil, and the communicating oil ducts of the front rocker arm shaft 13 and the rear rocker arm shaft 14 in the communicating oil duct 23 of the camshaft bearing cap serve as a pressure stabilizing cavity, so that continuous and stable oil supply and lubrication of the camshaft journal in the running process are ensured, the reliability is improved, and the abrasion risk of the camshaft is reduced.
Example 2
Other portions of this embodiment are the same as embodiment 1, except that the front oil groove and the rear oil groove are arranged in a splayed manner. Therefore, the contact surfaces of the front oil groove and the rear oil groove with the rocker shaft are more, and more lubrication is realized.
It will be appreciated that the front rocker arm shaft 13 is not limited to only the front camshaft bearing cap 11 and the intermediate camshaft bearing cap 2, and that in other embodiments, more than one camshaft bearing cap may be mounted on the front rocker arm shaft 13 between the front camshaft bearing cap 11 and the intermediate camshaft bearing cap 2;
likewise, the rear rocker arm shaft 14 is not limited to only the rear camshaft bearing cap 12 and the intermediate camshaft bearing cap 2, and in other embodiments, more than one camshaft bearing cap may be mounted on the rear rocker arm shaft 14 between the rear camshaft bearing cap 12 and the intermediate camshaft bearing cap 2.
While the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (1)
1. The utility model provides a camshaft bearing cap lubricating structure of sectional type rocking arm axle which characterized in that, including middle camshaft bearing cap, middle camshaft bearing cap rear plane is provided with the camshaft mounting hole, be provided with camshaft bearing UNICOM oil duct on the pore wall of camshaft mounting hole, be provided with the camshaft axle bush in the camshaft mounting hole, be provided with camshaft lubrication groove on the camshaft axle bush inner wall, be provided with camshaft axle bush inlet port in the camshaft lubrication groove, camshaft axle bush inlet port is linked together with the camshaft bearing UNICOM oil duct;
the front plane of the middle camshaft bearing cover is provided with a rocker shaft mounting hole, the hole wall of the rocker shaft mounting hole is provided with a front oil groove and a rear oil groove, one end in the front oil groove is provided with a front oil inlet channel, the other end is provided with a front oil passing bolt hole, and the front oil passing bolt hole is internally provided with a front oil passing channel and is communicated with a camshaft bearing communicating oil channel on the hole wall of the camshaft mounting hole; a rear end oil inlet channel is formed in one end in the rear end oil groove, a rear end passing bolt hole is formed in the other end of the rear end oil groove, and a rear end passing oil channel is formed in the rear end passing bolt hole and is communicated with a camshaft bearing communicating oil channel on the wall of a camshaft mounting hole;
further comprises: the cylinder cover is provided with a front rocker arm shaft and a rear rocker arm shaft, the front rocker arm shaft is mounted on the front cam shaft bearing cover and the middle cam shaft bearing cover, the rear rocker arm shaft is mounted on the rear cam shaft bearing cover and the middle cam shaft bearing cover, one end of each of the front rocker arm shaft and the rear rocker arm shaft is mounted on the middle cam shaft bearing cover, the front rocker arm shaft and the rear rocker arm shaft are coaxially arranged, a front rocker arm shaft oil duct is axially arranged in the front rocker arm shaft, the front rocker arm shaft oil duct penetrates out of the front rocker arm shaft, a front rocker arm shaft oil passing bolt hole is formed in the outer wall, opposite to a front end oil groove, of the front rocker arm shaft and a rocker arm shaft mounting hole, a rear rocker arm shaft oil duct is axially arranged in the rear rocker arm shaft, the rear rocker arm duct penetrates out of the rear rocker arm shaft, and a rear end oil passing bolt hole is formed in the outer wall, opposite to the rear end oil groove, of the rear rocker arm shaft and the rocker arm shaft mounting hole; the front camshaft bearing cover is internally provided with a front camshaft bearing cover upper oil duct, and the rear camshaft bearing cover is internally provided with a rear camshaft bearing cover upper oil duct; the cylinder cover is provided with a cylinder cover upper oil passage which is respectively communicated with a front camshaft bearing cover upper oil passage and a rear camshaft bearing cover upper oil passage, the front camshaft bearing cover upper oil passage is communicated with a front rocker shaft oil passage, and the rear camshaft bearing cover upper oil passage is communicated with a rear rocker shaft oil passage;
the front oil groove and the rear oil groove are arranged in a splayed mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011329500.1A CN112360590B (en) | 2020-11-24 | 2020-11-24 | Camshaft bearing cap lubricating structure of sectional type rocking arm axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011329500.1A CN112360590B (en) | 2020-11-24 | 2020-11-24 | Camshaft bearing cap lubricating structure of sectional type rocking arm axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112360590A CN112360590A (en) | 2021-02-12 |
| CN112360590B true CN112360590B (en) | 2024-04-05 |
Family
ID=74533251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011329500.1A Active CN112360590B (en) | 2020-11-24 | 2020-11-24 | Camshaft bearing cap lubricating structure of sectional type rocking arm axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112360590B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008057506A (en) * | 2006-09-04 | 2008-03-13 | Ntn Corp | Camshaft supporting structure and internal combustion engine |
| CN201314248Y (en) * | 2008-11-11 | 2009-09-23 | 无锡开普机械有限公司 | Valve rock arm device for internal-combustion engine |
| CN107956536A (en) * | 2017-10-27 | 2018-04-24 | 广西玉柴机器股份有限公司 | The lubrication system of V-type diesel camshaft |
| CN213980906U (en) * | 2020-11-24 | 2021-08-17 | 广西玉柴机器股份有限公司 | Sectional type rocking arm shaft's camshaft bearing cap lubricating structure |
-
2020
- 2020-11-24 CN CN202011329500.1A patent/CN112360590B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008057506A (en) * | 2006-09-04 | 2008-03-13 | Ntn Corp | Camshaft supporting structure and internal combustion engine |
| CN201314248Y (en) * | 2008-11-11 | 2009-09-23 | 无锡开普机械有限公司 | Valve rock arm device for internal-combustion engine |
| CN107956536A (en) * | 2017-10-27 | 2018-04-24 | 广西玉柴机器股份有限公司 | The lubrication system of V-type diesel camshaft |
| CN213980906U (en) * | 2020-11-24 | 2021-08-17 | 广西玉柴机器股份有限公司 | Sectional type rocking arm shaft's camshaft bearing cap lubricating structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112360590A (en) | 2021-02-12 |
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