CN112796848A - Novel double-rocker four-valve mechanism of single-cylinder diesel engine - Google Patents
Novel double-rocker four-valve mechanism of single-cylinder diesel engine Download PDFInfo
- Publication number
- CN112796848A CN112796848A CN202110024972.4A CN202110024972A CN112796848A CN 112796848 A CN112796848 A CN 112796848A CN 202110024972 A CN202110024972 A CN 202110024972A CN 112796848 A CN112796848 A CN 112796848A
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- Prior art keywords
- valve
- rocker arm
- rocker
- arm shaft
- oil duct
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Classifications
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- 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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- 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
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
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- 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
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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 novel double-rocker four-valve mechanism of a single-cylinder diesel engine. The rocker shaft seat is of a split type detachable structure and consists of a base and an upper cover; the rocker arm-rocker arm shaft is of an integrated structure, a spherical pressure head is arranged at the end part of the rocker arm, and the spherical pressure head presses the upper surface of the valve bridge boss; the valve bridge both ends are equipped with the cylinder pipe, and upper portion is equipped with the boss in the valve pole, and cylinder pipe lower extreme pressure leaves the clearance between cylinder pipe and the valve pole at valve boss upper surface, and when the valve bridge both sides valve was opened and close the action asynchronous, the cylinder pipe took place the auto-lock with the valve pole, realized the synchronous action of opening and close under the restraint of valve bridge. And through oil ducts are arranged in the cylinder cover, the rocker arm shaft seat, the rocker arm-rocker arm shaft and the valve bridge, so that effective lubrication is ensured. The four-valve mechanism can be driven by the four-valve mechanism based on the double rocker arms, has a simple and reliable structure, is easy to disassemble and maintain, and is beneficial to popularization and application.
Description
Technical Field
The invention relates to the field of single-cylinder diesel engines, in particular to a novel double-rocker four-valve mechanism of a single-cylinder diesel engine.
Background
The single-cylinder diesel engine is important agricultural machinery power equipment since the time of the agricultural chemistry, and is increasingly widely applied in the fields of inland river shipping, emergency power generation and the like. The single-cylinder diesel engine adopts a double-rocker four-valve structure, so that the valve area can be increased, the pumping power at high speed is reduced, the ventilation loss is reduced, and the inflation coefficient is improved. And the strength of the intake vortex can be conveniently changed according to the rotating speed and the load of the engine, so that the engine can obtain the optimal vortex ratio under different working conditions, and the performance of the engine is favorably improved. The rocker arm shaft seat of the existing double-rocker four-valve structure is designed in an integrated manner, is relatively complex to assemble, disassemble and maintain and cannot be well adapted to the existing working environment. The double-rocker four-valve mechanism requires the valves to be opened and closed simultaneously, and the existing valve bridge is complex in design structure, easy to clamp and difficult to meet the reliability of valve operation. Friction between parts of the valve train needs to be reduced in the working and running process, and the existing oil duct design is difficult to meet the lubricating requirement under the working condition of high-speed and large-load running. Therefore, a novel double-rocker four-valve mechanism of the single-cylinder diesel engine is provided to realize reliable and efficient operation of the single-cylinder diesel engine under the multi-working-condition and large-load conditions.
Disclosure of Invention
The invention provides a novel double-rocker four-valve mechanism of a single-cylinder diesel engine, which aims to solve the technical problem that a rocker shaft seat of the single-cylinder diesel engine can be detached and a valve can be opened and closed simultaneously.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel two rocking arm four-valve actuating mechanism of single cylinder diesel, includes rocking arm axle bed, rocking arm, valve bridge and valve, and the rocking arm axle bed is split type structure, and the rocking arm axle bed includes base and upper cover, and base top terminal surface is opened has lower semi-circular arc groove, and the bottom terminal surface of upper cover is opened has first semi-circular arc groove, and the base is fixed on the jar lid by bolt A, adopts bolt B with upper cover and pedestal connection, and both are connected and form the rocking arm shaft hole by lower semi-circular arc groove, the cooperation of first semi-circular arc groove, assemble the rocking arm axle in the rocking arm shaft hole. When the rocker arm and the rocker arm shaft need to be overhauled or replaced, only the upper cover needs to be disassembled, so that the disassembling times of the base are reduced, and the service life is prolonged.
According to the novel double-rocker four-valve air distribution mechanism of the single-cylinder diesel engine, the rocker arms and the rocker arm shafts are of an integrated structure, the rocker arms and the rocker arm shafts are integrally formed, the number of parts of the original rocker arm and rocker arm shaft split type design is reduced, and the assembling complexity is reduced.
The novel double-rocker four-valve distribution mechanism of the single-cylinder diesel engine is characterized in that a valve bridge boss is arranged in the middle of a valve bridge, cylindrical guide pipes are arranged at two ends of the valve bridge, the valve bridge boss is in mutual contact fit with spherical pressure heads at the end parts of rocker arms and rocker arms to transmit power, a valve rod in a valve is provided with a valve boss, the cylindrical guide pipes at two ends of the valve bridge are respectively sleeved on the valve rods at two sides, and the lower end of each cylindrical guide pipe is pressed on the upper surface of the valve boss to maintain linear motion of.
When the opening and closing actions of the valves at the two ends of the valve bridge are asynchronous, the cylindrical guide pipe and the valve rod are self-locked, and the synchronous opening and closing actions are realized under the constraint of the valve bridge; a gap is reserved between the cylindrical guide pipe and the valve rod, so that the problem that the valve cannot be sealed due to untight closing caused by over-constraint is solved.
According to the novel double-rocker four-valve mechanism of the single-cylinder diesel engine, the rocker shaft seat oil duct is arranged in the base, the base is assembled behind the cylinder cover, and the rocker shaft seat oil duct is communicated with the cylinder cover oil duct; ensuring that the valve train oil supply is sufficiently charged to maintain proper operation.
According to the novel double-rocker four-valve mechanism of the single-cylinder diesel engine, the horizontal oil duct and the vertical oil duct which are communicated with each other are arranged in the rocker arm shaft of the rocker arm-rocker arm shaft, the penetrating oil duct which penetrates through the rocker arm is arranged in the rocker arm, the penetrating oil duct which penetrates through the rocker arm is communicated with the horizontal oil duct in the rocker arm shaft, the rocker arm shaft is assembled in the rocker arm shaft hole, and when the rocker arm-rocker arm shaft rotates to a certain angle, the vertical oil duct in the rocker arm shaft is communicated with the rocker arm shaft seat oil duct, namely the rocker arm. Lubricating oil is guided to the spherical pressure head at the end part of the rocker arm through the rocker arm-rocker arm shaft oil passage, so that the friction force is reduced when the spherical pressure head is in contact fit with a boss of a valve bridge.
The two rocker arms of the novel single-cylinder diesel engine four-valve air distribution mechanism are provided with the inclined oil ducts on two sides of the valve bridge boss, and guide lubricating oil to the cylindrical guide pipes on two sides to lubricate the cylindrical guide pipes and the valve rods.
The four-valve mechanism can be driven by the four-valve mechanism based on the double rocker arms, has a simple and reliable structure, is easy to disassemble and maintain, and is beneficial to popularization and application.
Drawings
FIG. 1 is a schematic diagram of a double-rocker four-valve mechanism of a novel single-cylinder diesel engine.
FIG. 2 is an assembled elevation view of a rocker shaft seat.
FIG. 3 is an assembled cross-sectional view of a rocker shaft seat.
FIG. 4 is a top view of the rocker shaft seat assembly.
Fig. 5 is a sectional view of the valve structure.
Fig. 6 is a top view of the rocker arm-rocker shaft.
Fig. 7 is a sectional view of a rocker arm-rocker shaft.
In the figure: 1. the oil duct comprises a cylinder cover, 2, a cylinder cover oil duct, 3, bolts A, 4, a rocker arm shaft seat oil duct, 5, bolts B, 6, an upper cover, 7, a base, 8, a rocker arm shaft seat, 9, an inclined oil duct, 10, a rocker arm-rocker arm shaft, 11, a spherical pressure head, 12, a valve bridge boss, 13, a valve bridge, 14, a cylindrical guide pipe, 15, a valve boss, 16, a valve, 17, a valve spring, 18, a valve spring seat, 19, a valve lock clamp, 20 and a rocker arm-rocker arm shaft oil duct.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the double-rocker four-valve actuating mechanism comprises four valve groups and two valve transmission groups; each valve set comprises a valve 16, a valve spring 17, a valve spring seat 18, and a valve collet 19. Each valve transmission set comprises a rocker arm shaft seat 8, a rocker arm-rocker arm shaft 10 and a valve bridge 13.
As shown in fig. 2-4, the detachable rocker arm shaft seat 8 device is characterized in that the detachable rocker arm shaft seat 8 is composed of a base 7 and an upper cover 6. The base hole sets up in base central point and puts, and base 7 is connected by bolt A3 with cylinder cap 1, ensures that rocking arm axle bed oil duct 4 and cylinder cap oil duct 2 communicate each other during the assembly. The end face of the top end of the base 7 is provided with a lower semi-arc groove, the end face of the bottom end of the upper cover 6 is provided with an upper semi-arc groove, the upper cover 6 is connected with the base 7 by a bolt B5, the lower semi-arc groove and the upper semi-arc groove are matched to form a rocker shaft hole, and the rocker arm-rocker shaft 10 is assembled in the rocker shaft hole. When the rocker arm-rocker arm shaft 10 needs to be overhauled or replaced, only the upper cover 6 needs to be disassembled, so that the disassembling times of the base 7 are reduced, and the service life is prolonged.
As shown in FIG. 5, the spherical pressure head 11 at the end of the rocker arm is in mutual contact fit with a valve bridge boss 12, and inclined oil channels 9 are arranged on two sides of the valve bridge boss 12 to introduce lubricating oil on the upper surface of the boss into a cylindrical guide pipe 14. The two ends of the valve bridge 13 are provided with cylindrical guide pipes 14, the valve rods are provided with bosses, the lower ends of the cylindrical guide pipes 14 are pressed on the upper surfaces of the valve bosses 15, when the opening and closing actions of the two valves 16 are asynchronous, the cylindrical guide pipes 14 and the valve rods are self-locked, and the synchronous opening and closing actions are realized under the constraint of the valve bridge 13; a gap is reserved between the inner wall of the cylindrical guide pipe 14 and the valve rod, so that the problem that the valve 16 cannot be tightly closed due to over-constraint and cannot play a sealing role is solved, and meanwhile, sufficient lubrication is guaranteed. Besides, the valve train comprises valve spring 17, valve spring seat 18, valve lock clamp 19 and other valve train parts which assist the normal operation of the valve train.
As shown in fig. 6 to 7, the rocker arm-rocker shaft 10 is internally provided with a through oil passage. When the rocker arm-rocker arm shaft 10 is installed, the rocker arm-rocker arm shaft oil duct 20 is communicated with the rocker arm shaft seat oil duct 4, so that the normal supply of lubricating oil in the machine body is ensured, and the sufficient lubrication is ensured when the rocker arm-rocker arm shaft 10 rotates. Lubricating oil is guided to the spherical pressure head 11 at the end part of the rocker arm through the rocker arm-rocker arm shaft oil passage 20, and friction is reduced when the spherical pressure head 11 and the valve bridge boss 12 are in mutual contact and match.
Claims (7)
1. The utility model provides a novel four valve actuating mechanisms of two rocking arms of single cylinder diesel, includes rocking arm axle bed (8), rocking arm, valve bridge (13) and valve (16), its characterized in that: rocker arm shaft seat (8) include base (7) and upper cover (6), and base (7) top terminal surface is opened there is lower semicircle arc groove, and the bottom terminal surface of upper cover (6) is opened there is last semicircle arc groove, and base (7) are fixed on the jar lid by bolt A (3), adopt bolt B (5) to be connected upper cover (6) and base (7), and both are connected and form the rocker arm shaft hole by lower semicircle arc groove and the cooperation of last semicircle arc groove, assemble the rocker arm axle in the rocker arm shaft hole.
2. The novel double-rocker four-valve actuating mechanism of the single-cylinder diesel engine as claimed in claim 1, characterized in that: the rocker arm and the rocker arm shaft are of an integrated structure and are integrally formed into a rocker arm-rocker arm shaft (10).
3. The novel single cylinder diesel engine double-rocker four-valve actuating mechanism of claim 2, characterized in that: the valve bridge (13) middle part is equipped with valve bridge boss (12), and valve bridge (13) both ends set up cylindrical guide pipe (14), and valve bridge boss (12) and rocking arm-rocking arm axle (10) tip spherical pressure head (11) mutually contact the cooperation, the transmission power, and the valve rod in valve (16) is equipped with valve boss (15), and valve bridge (13) both ends cylindrical guide pipe (14) overlap respectively on the valve rod of both sides, and cylindrical guide pipe (14) lower extreme is pressed on valve boss upper surface, maintains the valve along axis linear motion.
4. The novel double-rocker four-valve actuating mechanism of the single-cylinder diesel engine as claimed in claim 3, characterized in that: when the opening and closing actions of the air valves (16) at the two ends of the air valve bridge (13) are asynchronous, the cylindrical guide pipe (14) and the air valve rod are subjected to self locking, and the synchronous opening and closing actions are realized under the constraint of the air valve bridge (13); a clearance is reserved between the cylindrical guide pipe (14) and the valve rod, so that the valve (16) is prevented from being closed untight due to over-constraint and cannot play a sealing role.
5. The novel double-rocker four-valve actuating mechanism of the single-cylinder diesel engine as claimed in claim 4, characterized in that: a rocker shaft seat oil duct (4) is arranged in the base (7), and after the base (7) is assembled on the cylinder cover (1), the rocker shaft seat oil duct (4) is communicated with the cylinder cover oil duct (2).
6. The novel double-rocker four-valve actuating mechanism of the single-cylinder diesel engine as claimed in claim 5, characterized in that: the rocker arm shaft of the rocker arm-rocker arm shaft (10) is internally provided with a horizontal oil duct and a vertical oil duct which are communicated with each other, the rocker arm is internally provided with a through oil duct which penetrates through the rocker arm, the through oil duct inside the rocker arm is communicated with the horizontal oil duct inside the rocker arm shaft, the rocker arm shaft is assembled in the rocker arm shaft hole, and when the rocker arm-rocker arm shaft (10) rotates to a certain angle, the vertical oil duct inside the rocker arm shaft is communicated with the rocker arm shaft seat oil duct (4), namely the rocker arm-rocker arm shaft oil duct (20) is communicated with the rocker arm.
7. The novel single cylinder diesel dual-rocker four-valve actuating mechanism of claim 6, characterized in that: inclined oil ducts (9) are arranged on two sides of the valve bridge boss (12) and guide lubricating oil to the cylindrical guide pipes (14) on two sides to lubricate the cylindrical guide pipes (14) and the valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110024972.4A CN112796848A (en) | 2021-01-08 | 2021-01-08 | Novel double-rocker four-valve mechanism of single-cylinder diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110024972.4A CN112796848A (en) | 2021-01-08 | 2021-01-08 | Novel double-rocker four-valve mechanism of single-cylinder diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112796848A true CN112796848A (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110024972.4A Pending CN112796848A (en) | 2021-01-08 | 2021-01-08 | Novel double-rocker four-valve mechanism of single-cylinder diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112796848A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4495906A (en) * | 1981-12-16 | 1985-01-29 | Daimler-Benz Ag | Valve guide arrangement for the valve stem of a valve in an internal combustion engine |
| EP0369967A1 (en) * | 1988-11-15 | 1990-05-23 | Ab Volvo | A valve arrangement in an internal combustion engine |
| CN201074533Y (en) * | 2007-08-02 | 2008-06-18 | 力帆实业(集团)股份有限公司 | Rotary device of engine exhaust door lever |
| CN102305114A (en) * | 2011-03-14 | 2012-01-04 | 隆鑫通用动力股份有限公司 | Gasoline engine and air valve rocker assembly for same |
| CN204961000U (en) * | 2012-09-24 | 2016-01-13 | 雅各布斯车辆系统公司 | Integrated dynamic formula rocking arm stopper system of losing with automatic re -setting |
| CN205189989U (en) * | 2015-12-01 | 2016-04-27 | 重庆长安汽车股份有限公司 | Tapered engine valve structure in valve stem area |
| CN205689259U (en) * | 2016-05-31 | 2016-11-16 | 浙江新柴股份有限公司 | Engine valve rocker arm mechanism lubrication system |
| CN205895339U (en) * | 2016-08-02 | 2017-01-18 | 东风朝阳朝柴动力有限公司 | Four properties door engine valve is passed a bridge convenient to assembly |
| CN206246172U (en) * | 2016-11-19 | 2017-06-13 | 周文娟 | A kind of exhaust valve structure for motor generator cylinder head |
| CN107842408A (en) * | 2017-11-16 | 2018-03-27 | 潍柴动力股份有限公司 | A kind of variable air valve lift range mechanism, the method and engine for controlling valve stroke |
-
2021
- 2021-01-08 CN CN202110024972.4A patent/CN112796848A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4495906A (en) * | 1981-12-16 | 1985-01-29 | Daimler-Benz Ag | Valve guide arrangement for the valve stem of a valve in an internal combustion engine |
| EP0369967A1 (en) * | 1988-11-15 | 1990-05-23 | Ab Volvo | A valve arrangement in an internal combustion engine |
| CN201074533Y (en) * | 2007-08-02 | 2008-06-18 | 力帆实业(集团)股份有限公司 | Rotary device of engine exhaust door lever |
| CN102305114A (en) * | 2011-03-14 | 2012-01-04 | 隆鑫通用动力股份有限公司 | Gasoline engine and air valve rocker assembly for same |
| CN204961000U (en) * | 2012-09-24 | 2016-01-13 | 雅各布斯车辆系统公司 | Integrated dynamic formula rocking arm stopper system of losing with automatic re -setting |
| CN205189989U (en) * | 2015-12-01 | 2016-04-27 | 重庆长安汽车股份有限公司 | Tapered engine valve structure in valve stem area |
| CN205689259U (en) * | 2016-05-31 | 2016-11-16 | 浙江新柴股份有限公司 | Engine valve rocker arm mechanism lubrication system |
| CN205895339U (en) * | 2016-08-02 | 2017-01-18 | 东风朝阳朝柴动力有限公司 | Four properties door engine valve is passed a bridge convenient to assembly |
| CN206246172U (en) * | 2016-11-19 | 2017-06-13 | 周文娟 | A kind of exhaust valve structure for motor generator cylinder head |
| CN107842408A (en) * | 2017-11-16 | 2018-03-27 | 潍柴动力股份有限公司 | A kind of variable air valve lift range mechanism, the method and engine for controlling valve stroke |
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Application publication date: 20210514 |
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| RJ01 | Rejection of invention patent application after publication |