CN107939467B - Valve air inlet and outlet rocker arm structure and diesel engine - Google Patents
Valve air inlet and outlet rocker arm structure and diesel engine Download PDFInfo
- Publication number
- CN107939467B CN107939467B CN201711457120.4A CN201711457120A CN107939467B CN 107939467 B CN107939467 B CN 107939467B CN 201711457120 A CN201711457120 A CN 201711457120A CN 107939467 B CN107939467 B CN 107939467B
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- rocker arm
- valve
- air inlet
- intake
- support shaft
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- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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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 provides a valve air inlet and outlet rocker arm structure, wherein an air inlet rocker arm and an air outlet rocker arm are respectively supported by a first supporting shaft and a second supporting shaft, the first supporting shaft and the second supporting shaft are arranged at intervals in the swinging direction of the air inlet rocker arm, a near-end valve of a valve close to a rocker arm seat is set as an air outlet valve, a far-end valve of a valve far away from the rocker arm seat is set as an air inlet valve, the far-end valve is driven to act through swinging of the air inlet rocker arm, and the near-end valve is driven to act through swinging of the air outlet rocker arm. The invention also provides a diesel engine with the valve air inlet and outlet rocker arm structure.
Description
Technical Field
The invention relates to the technical field of intake and exhaust valves, in particular to an intake and exhaust rocker arm structure of an air valve and a diesel engine.
Background
The valve mechanism is an important component system of the engine and has the functions of opening and closing the air inlet valve and the air outlet valve regularly according to the requirement of the working cycle and the ignition sequence carried out in each cylinder of the engine, so that fresh air can enter the cylinder in time and waste gas can be discharged from the cylinder in time.
The intake valve and the exhaust valve are both inversely hung on the cylinder cover and consist of a valve lock clamp, a valve spring seat, a valve spring and the like. The intake valve and the exhaust valve are driven to open and close by the intake rocker arm shaft, so that the intake rocker arm ratio and the exhaust rocker arm ratio are reasonable, and the lift and the dynamics performance of the valve can be effectively ensured.
In the prior art, an intake rocker arm and an exhaust rocker arm are coaxially arranged, and the intake valve and the exhaust valve are driven to swing through independent swinging of the intake rocker arm and the exhaust rocker arm. However, the existing air inlet rocker arm and the existing exhaust rocker arm synchronously drive the near-end valve and the far-end valve to synchronously operate so as to ensure the consistency of air inlet and exhaust, avoid the mutual interference of the air inlet rocker arm and the exhaust rocker arm, and easily cause uneven stress in the swing process of the air inlet rocker arm and the exhaust rocker arm, so that the problem of asynchronous opening and closing of the air inlet and the exhaust valve is caused.
Therefore, how to improve the consistency of the operation of the intake and exhaust valves is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a valve intake and exhaust rocker arm structure to improve the consistency of the work of the intake and exhaust valves; the invention also provides a diesel engine.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an air valve air inlet and outlet rocker arm structure comprises an air inlet rocker arm, an air outlet rocker arm and a rocker arm seat for supporting the air inlet rocker arm and the air outlet rocker arm to swing;
the rocker arm seat comprises a first supporting shaft and a second supporting shaft, the first supporting shaft and the second supporting shaft are used for supporting the air inlet rocker arm respectively, and the first supporting shaft and the second supporting shaft are arranged at intervals along the swing direction of the air inlet rocker arm;
the swing end of the air inlet rocker arm is provided with a far-end rocker arm pressure head for driving a far-end valve, and the swing end of the air outlet rocker arm is provided with a near-end rocker arm pressure head for driving a near-end valve.
Preferably, in the valve intake and exhaust rocker arm structure, the exhaust rocker arm comprises a rocker arm bridge arranged above the rocker arm seat, a first shaft sleeve and a second shaft sleeve which are respectively sleeved and matched with the two axial ends of the second support shaft, and the near-end rocker arm pressure head extends out of the top of the rocker arm bridge.
Preferably, in the valve intake and exhaust rocker arm structure, the proximal rocker arm pressure head includes a first proximal rocker arm pressure head and a second proximal rocker arm pressure head respectively disposed at two ends of the rocker arm bridge in the supporting direction.
Preferably, in the valve intake and exhaust rocker arm structure, the second support shaft includes a first sub-support shaft and a second sub-support shaft respectively fitted with the first sleeve and the second sleeve.
Preferably, in the valve intake and exhaust rocker structure, the first support shaft is located in the middle of the first sub support shaft and the second sub support shaft, and a third shaft sleeve assembled with the first support shaft sleeve is arranged on the intake rocker.
Preferably, in the valve intake and exhaust rocker arm structure, the intake rocker arm includes an intake rocker arm lever extending between the rocker arm bridge and the rocker arm seat, and a swing end of the intake rocker arm lever extends to form a first distal rocker arm pressure head and a second distal rocker arm pressure head, which are respectively connected with the distal valve.
Preferably, in the valve intake and exhaust rocker arm structure, a push rod driving seat of the exhaust rocker arm is arranged at one end of the rocker arm bridge along the supporting direction; the push rod driving seat of the air inlet rocker arm is arranged at the driving end of the air inlet rocker arm rod.
Preferably, in the valve intake and exhaust rocker arm structure, the rocker arm seat includes a rocker arm seat body, and the first support shaft and the second support shaft are respectively fixed at the front end and the rear end of the rocker arm seat body; the second support shaft comprises a connecting shaft rod fixedly connected with the rocker arm seat body and connected with the first sub support shaft and the second sub support shaft.
A diesel engine, wherein a cylinder cover is provided with a valve air inlet and outlet rocker arm structure, and the valve air inlet and outlet rocker arm structure is any one of the valve air inlet and outlet rocker arm structures.
The invention provides a valve air inlet and outlet rocker structure, which comprises an air inlet rocker, an air outlet rocker and a rocker seat for supporting the air inlet rocker and the air outlet rocker to swing; the rocker arm seat comprises a first supporting shaft and a second supporting shaft, wherein the first supporting shaft and the second supporting shaft are used for supporting the air inlet rocker arm respectively, and the first supporting shaft and the second supporting shaft are arranged at intervals along the swinging direction of the air inlet rocker arm; the swing end of the air inlet rocker is provided with a far-end rocker pressure head for driving a far-end valve, and the swing end of the air outlet rocker is provided with a near-end rocker pressure head for driving a near-end valve. The air inlet rocker arm and the air outlet rocker arm are respectively supported by a first supporting shaft and a second supporting shaft, the first supporting shaft and the second supporting shaft are arranged at intervals in the swinging direction of the air inlet rocker arm, the near-end valve of the valve, which is close to the rocker arm seat, is set as an air outlet valve, the far-end valve, which is far away from the rocker arm seat, is set as an air inlet valve, the far-end valve is driven to act through swinging of the air inlet rocker arm, and the near-end valve is driven to act through swinging of the air outlet rocker arm.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an assembly view of a valve intake and exhaust rocker structure provided by the invention;
FIG. 2 is a schematic view of the rocker arm seat of FIG. 1;
fig. 3 is an exploded view of the valve intake and exhaust rocker structure of fig. 1.
Detailed Description
The invention discloses an air inlet and outlet rocker arm structure of an air valve, which improves the working consistency of the air inlet and outlet valve; the invention also provides a diesel engine.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-3, fig. 1 is an assembly diagram of an intake and exhaust rocker arm structure of a valve provided by the invention; FIG. 2 is a schematic view of the rocker arm seat of FIG. 1; fig. 3 is an exploded view of the valve intake and exhaust rocker structure of fig. 1.
The invention provides a valve air inlet and exhaust rocker structure, which comprises an air inlet rocker 4, an exhaust rocker 5 and a rocker seat 3 for supporting the air inlet rocker 4 and the exhaust rocker 5 to swing; the rocker arm seat 3 includes a first support shaft 1 supporting an intake rocker arm 4 and a second support shaft 2 supporting an exhaust rocker arm 5, respectively, the first support shaft 1 and the second support shaft 2 being arranged at intervals in the swing direction of the intake rocker arm 4; the swing end of the exhaust rocker arm 5 is provided with a proximal rocker arm ram that drives a proximal valve 57, and the swing end of the intake rocker arm 4 is provided with a distal rocker arm ram that drives a distal valve 45. The air inlet rocker arm 4 and the exhaust rocker arm 5 are respectively supported by the first supporting shaft 1 and the second supporting shaft 2, the first supporting shaft 1 and the second supporting shaft 2 are arranged at intervals in the swinging direction of the air inlet rocker arm 4, the near-end valve 57 of the valve, which is close to the rocker arm seat 3, is set as an exhaust valve, the far-end valve 45, which is far away from the rocker arm seat 3, is set as an air inlet valve, the far-end valve 45 is driven to act through the swinging of the air inlet rocker arm 4, and the near-end valve 57 is driven to act through the swinging of the exhaust rocker arm 5.
In this embodiment, the exhaust rocker arm 5 includes a rocker arm bridge 51 erected above the rocker arm seat 3, a first shaft sleeve 52 and a second shaft sleeve which are located at the bottom of the rocker arm bridge 51 and are respectively sleeved and matched with two axial ends of the second support shaft 2, and a proximal rocker arm pressure head extends out of the top of the rocker arm bridge 51. The exhaust rocker arm 5 comprises a rocker arm bridge 51, a first shaft sleeve 52 and a second shaft sleeve which are used for supporting the rocker arm bridge, the rocker arm bridge 51 is arranged above the rocker arm seat 3, and the swing of the rocker arm bridge 51 is realized through the sleeving structures of the first shaft sleeve 52 and the second shaft sleeve and the two axial ends of the second supporting shaft 2.
The top of the rocker arm bridge 51 extends out of a near-end rocker arm pressure head, the near-end rocker arm pressure head extends out of the top of the rocker arm bridge 51 to be in press fit with a near-end valve, and a channel for supporting the air inlet rocker arm 4 is formed between the rocker arm bridge 51 and the rocker arm seat 3 in the process of pressing the exhaust rocker arm 5 on the near-end valve.
In this particular embodiment, the proximal rocker ram includes a first proximal rocker ram 54 and a second proximal rocker ram 55 disposed at opposite ends of the rocker bridge 51 in the support direction. In order to avoid interference between the proximal rocker arm pressure head and the intake rocker arm 4 during the swing process of the intake rocker arm 4, the proximal rocker arm pressure head is respectively arranged at two ends of the rocker arm bridge 51 in the supporting direction, specifically, a first proximal rocker arm pressure head 54 and a second proximal rocker arm pressure head 55 which are close to the first shaft sleeve 52 and the second shaft sleeve, and respectively drive one of two valves of the proximal valve, and a channel communicated with the bottom of the rocker arm bridge 51 and used for accommodating the swing of the intake rocker arm 4 is enclosed between the first proximal rocker arm pressure head 54 and the second proximal rocker arm pressure head 55.
In this embodiment, the second support shaft 2 includes a first sub support shaft 22 and a second sub support shaft 21 that are respectively fitted with the first sleeve 52 and the second sleeve. In order to further reduce the structure of the exhaust rocker arm 5 and fully expand the space between the exhaust rocker arm 5 and the rocker arm seat 3, the second support shaft 2 is provided with a first sub support shaft 22 and a second sub support shaft 21 which are respectively assembled with the first shaft sleeve 52 and the second shaft sleeve, and the space occupation between the exhaust rocker arm 5 and the rocker arm seat 3 is reduced by respectively sleeved and matched with the exhaust rocker arm 5 through the independent sub support shafts.
In this embodiment, the first supporting shaft 1 is located in the middle of the first sub supporting shaft 22 and the second sub supporting shaft, and the air intake rocker arm 4 is provided with a third shaft sleeve 46 that is sleeved and matched with the first supporting shaft 1. Due to the sufficient release of the space between the exhaust rocker arm 5 and the rocker arm seat 3, the first support shaft 1 can be arranged between the first sub support shaft 22 and the second sub support shaft 21, and the third shaft sleeve 46 is arranged on the intake rocker arm 4 and is matched with the first support shaft 1 in a sleeved mode.
In this embodiment, the intake rocker arm 4 includes an intake rocker arm lever 41 extending between a rocker arm bridge 51 and the rocker arm base 3, and a first distal rocker arm ram 42 and a second distal rocker arm ram 43 connected to the distal valve 45, respectively, extend from the swing end of the intake rocker arm lever 41. The intake rocker arm 4 drives two valves of the far-end valve synchronously, because the intake rocker arm 4 stretches into the middle parts of the exhaust rocker arm 5 and the rocker arm seat 3 and is independently supported by the first supporting shaft 1, the structure of the intake rocker arm 4 is reduced as much as possible, and the intake rocker arm is symmetrically supported on the first supporting shaft 1.
The air inlet rocker arm 4 extends into the space between the rocker arm bridge 51 and the rocker arm seat 3 through the air inlet rocker arm rod 41, the swing end of the air inlet rocker arm rod 41 symmetrically extends out of the first far-end rocker arm pressure head 42 and the second far-end rocker arm pressure head 43, and when the air inlet rocker arm rod 41 drives the far-end valve to act, the driving end of the air inlet rocker arm rod 41 swings in the middle of the rocker arm bridge 51 and the rocker arm seat 3, and interference in the working process of the air inlet rocker arm and the exhaust rocker arm is avoided through the design of the swing amplitude of the air inlet rocker arm and the exhaust rocker arm. The swing end of the intake rocker arm 41 swings between the first proximal rocker arm ram 54 and the second proximal rocker arm ram 55, and the positions of the intake rocker arm 41 separating the first distal rocker arm ram 42 and the second distal rocker arm ram 43 should be designed to avoid interference with the proximal valve 57 during operation.
In this embodiment, the push rod driving seat of the exhaust rocker arm 5 is disposed at one end of the rocker bridge 51 along the supporting direction; the push rod driving seat of the intake rocker arm 4 is provided at the driving end of the intake rocker arm lever 41. The intake rocker arm 4 is supported by the independent first supporting shaft 1, and is pressed by the symmetrical compression force of the far-end valve when the intake rocker arm 4 swings up and down, and the push rod driving seat 44 of the intake rocker arm 4 is arranged at the driving end of the intake rocker arm lever 41 and is positioned on the middle line of the first supporting shaft 1, so that the stability of the intake rocker arm 4 in the swinging process is improved. The exhaust rocker arm 5 is supported by the first sub supporting shaft 22 and the second sub supporting shaft at the same time, a push rod driving seat 56 of the exhaust rocker arm 5 can be arranged at one end of the rocker arm bridge 51 in the supporting direction of the second supporting shaft 2, and synchronous driving of the first near-end rocker arm pressure head 54 and the second near-end rocker arm pressure head 55 can be realized by the rocker arm bridge 51.
In this case, in one embodiment, the rocker arm seat includes a rocker arm seat body, and the first support shaft 1 and the second support shaft 2 are respectively fixed at the front end and the rear end of the rocker arm seat body; the second support shaft 2 comprises a connecting shaft lever 23 fixedly connected with the rocker arm seat body and connected with the first sub support shaft 22 and the second sub support shaft 21. Because the first support shaft 1 and the second support shaft 2 are of a sleeved structure with the air inlet rocker arm 4 and the air outlet rocker arm 5, the rocker arm seat 3 is of a split structure consisting of a rocker arm seat body, the first support shaft 1 and the second support shaft 2, the fixed end of the first support shaft 1 is positioned at two axial ends of the first support shaft, and the first support shaft 1 is fixedly arranged at the front end of the rocker arm seat 3 through screws after being sleeved on the air inlet rocker arm 4. The second support shaft 2 comprises a first sub support shaft 22 and a second sub support shaft 21, which are connected through a connecting shaft rod 23, the second support shaft 2 is sleeved on the first shaft sleeve 52 and the second shaft sleeve during installation, the connecting shaft rod 23 is fixed on the rocker arm seat body through screws, and correspondingly, the rocker arm bridge 51 is provided with an installation hole for locking the fixing screws of the connecting shaft rod 23.
Based on the valve intake and exhaust rocker structure provided in the above embodiment, the invention also provides a diesel engine, wherein the valve intake and exhaust rocker structure is arranged on the cylinder cover of the diesel engine, and the valve intake and exhaust rocker structure arranged on the diesel engine is the valve intake and exhaust rocker structure provided in the above embodiment.
The diesel engine adopts the valve air inlet and outlet rocker arm structure of the embodiment, so the beneficial effects brought by the valve air inlet and outlet rocker arm structure of the diesel engine are shown in the embodiment.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The valve air inlet and outlet rocker arm structure is characterized by comprising an air inlet rocker arm, an air outlet rocker arm and a rocker arm seat for supporting the air inlet rocker arm and the air outlet rocker arm to swing;
the rocker arm seat comprises a first supporting shaft and a second supporting shaft, the first supporting shaft and the second supporting shaft are used for supporting the air inlet rocker arm respectively, and the first supporting shaft and the second supporting shaft are arranged at intervals along the swing direction of the air inlet rocker arm;
the swing end of the air inlet rocker is provided with a far-end rocker pressure head for driving a far-end valve, and the swing end of the air outlet rocker is provided with a near-end rocker pressure head for driving a near-end valve;
the air inlet rocker arm and the air outlet rocker arm respectively control the air valves within the same swing distance, so that the working synchronism of the air inlet air valve and the air outlet air valve is improved.
2. A valve intake and exhaust rocker arm structure according to claim 1, wherein the exhaust rocker arm comprises a rocker arm bridge erected above the rocker arm seat, a first shaft sleeve and a second shaft sleeve which are positioned at the bottom of the rocker arm bridge and are respectively sleeved and matched with two axial ends of the second support shaft, and the proximal rocker arm pressure head extends out of the top of the rocker arm bridge.
3. A valve intake and exhaust rocker arm structure according to claim 2, wherein the proximal rocker arm ram comprises a first proximal rocker arm ram and a second proximal rocker arm ram disposed at both ends of the rocker arm bridge in the support direction, respectively.
4. A valve intake and exhaust rocker arm structure according to claim 3, wherein the second support shaft includes a first sub-support shaft and a second sub-support shaft that are respectively fitted with the first sleeve and the second sleeve.
5. The valve intake and exhaust rocker arm structure according to claim 4, wherein the first support shaft is located in the middle of the first sub support shaft and the second sub support shaft, and a third shaft sleeve assembled with the first support shaft sleeve is provided on the intake rocker arm.
6. A valve intake and exhaust rocker arm structure according to claim 4, wherein the intake rocker arm comprises an intake rocker arm lever extending between the rocker arm bridge and the rocker arm seat, and a swing end of the intake rocker arm lever extends with a first distal rocker arm ram and a second distal rocker arm ram respectively connected to the distal valve.
7. The structure of claim 6, wherein the pushrod driving seat of the exhaust rocker is disposed at one end of the rocker bridge along the supporting direction thereof; the push rod driving seat of the air inlet rocker arm is arranged at the driving end of the air inlet rocker arm rod.
8. A valve intake and exhaust rocker arm structure according to claim 5, wherein the rocker arm seat comprises a rocker arm seat body, and the first support shaft and the second support shaft are respectively fixedly mounted at the front end and the rear end of the rocker arm seat body; the second support shaft comprises a connecting shaft rod fixedly connected with the rocker arm seat body and connected with the first sub support shaft and the second sub support shaft.
9. A diesel engine provided with a valve intake and exhaust rocker structure on a cylinder head, characterized in that the valve intake and exhaust rocker structure is as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711457120.4A CN107939467B (en) | 2017-12-28 | 2017-12-28 | Valve air inlet and outlet rocker arm structure and diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711457120.4A CN107939467B (en) | 2017-12-28 | 2017-12-28 | Valve air inlet and outlet rocker arm structure and diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107939467A CN107939467A (en) | 2018-04-20 |
| CN107939467B true CN107939467B (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711457120.4A Active CN107939467B (en) | 2017-12-28 | 2017-12-28 | Valve air inlet and outlet rocker arm structure and diesel engine |
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