CN109026252B - Engine gas distribution system and engine - Google Patents
Engine gas distribution system and engine Download PDFInfo
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- CN109026252B CN109026252B CN201810879337.2A CN201810879337A CN109026252B CN 109026252 B CN109026252 B CN 109026252B CN 201810879337 A CN201810879337 A CN 201810879337A CN 109026252 B CN109026252 B CN 109026252B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 229910001018 Cast iron Inorganic materials 0.000 claims description 170
- 239000010959 steel Substances 0.000 claims description 170
- 229910000831 Steel Inorganic materials 0.000 claims description 169
- 238000009434 installation Methods 0.000 claims description 22
- 229910000838 Al alloy Inorganic materials 0.000 description 10
- 239000000956 alloy Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/352—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
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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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The timing driving gear body is sleeved on the shaft sleeve of the crankshaft through transmission fit, and the timing driving gear body is sleeved on the crankshaft in a clearance mode.
Description
Technical Field
The invention relates to power equipment, in particular to an engine air distribution system and an engine.
Background
Engines are commonly used power plants, and since an engine is a typical heat engine, power is generated by combustion of fuel, thermal deformation of the various components of the engine block, cylinder head, crankshaft, and air distribution system can occur. In the existing engine, the cylinder head is made of aluminum alloy materials, is light and has enough strength.
However, the matching of the aluminum alloy cylinder head and other parts of the engine has a series of problems, such as a gas distribution system, from a timing driving gear to a rocker arm, all deform at high temperature, so that the running noise of the whole engine is increased, the matching relation of the parts is changed due to the thermal deformation, and the service life of the parts is influenced. In the prior art, a timing driving gear in a gas distribution system is matched with a crankshaft in a transmission way, the appearance of the timing driving gear is changed due to the thermal deformation of the crankshaft and the thermal deformation of the gear, and the meshing relationship between the timing driving gear and a driven gear is changed, so that noise and service life are reduced, and the environmental protection performance of an engine is influenced by larger noise.
Based on the above problems, the matching relation of the timing driving gear of the gas distribution system needs to be improved, so that the influence of thermal expansion of a crankshaft and thermal deformation of the gear on the meshing transmission performance of the gear can be avoided as much as possible, the running noise is reduced, the service cycle of the component is prolonged, and the normal running of the engine is ensured.
Disclosure of Invention
Therefore, the invention aims to provide an engine gas distribution system and an engine, which can avoid the influence of thermal expansion of a crankshaft and thermal deformation of a gear on the meshing transmission performance of the gear as much as possible, reduce operation noise and improve the service cycle of components, thereby ensuring the normal operation of the engine.
According to the engine gas distribution system, the timing driving gear of the gas distribution system comprises a timing driving gear body and a shaft sleeve formed by extending along the axial direction of the timing driving gear body (the shaft sleeve is integrally formed and extended from the side surface of the timing driving gear and can be understood as a shaft shoulder structure), the timing driving gear body is matched with the shaft sleeve sleeved on a crankshaft through transmission to form transmission, and the timing driving gear body is sleeved on the crankshaft in a clearance mode; in the existing design, the timing gear is directly driven (interference) and pressed on the crankshaft, and the tooth shape of the timing driving gear can deform due to interference force and cold and hot deformation, so that adverse effects such as noise generated by unsmooth operation and the like can be generated during meshing transmission, and even the normal operation of gas distribution can be influenced, so that the timing gear cannot adapt to a series of improvements such as the matching of high compression ratio and the like; in the invention, the timing driving gear is matched with the crankshaft for transmission through the shaft sleeve part, and the shaft sleeve part bears the interference force of transmission connection, so that the thermal deformation of the timing driving gear body is not constrained or influenced by the thermal expansion of the crankshaft, and the timing driving gear also has certain transmission and meshing flexibility due to the existence of a gap, and counteracts the influence of self thermal deformation on the meshing relationship, thereby ensuring the transmission smoothness of a gas distribution system and further ensuring the overall low-noise and high-efficiency operation of the engine.
Furthermore, the timing driving gear body is sleeved on the shaft sleeve of the crankshaft through interference transmission fit to form transmission, so that the transmission and position limitation are ensured, and the structure is simple and compact.
Further, an annular sinking groove is processed at the corresponding position of the crankshaft and the timing driving gear body, and the annular sinking groove enables the timing driving gear body to be sleeved outside the crankshaft in a clearance manner; of course, the inner circle of the corresponding position of the timing driving gear body can be processed into a structure with a slightly larger diameter (larger than the matched inner diameter of the shaft sleeve), and the aim of the invention can be achieved.
Further, the rocker arm bracket of the air distribution system is arranged on the engine cylinder head, a steel or cast iron insert I is embedded on the engine cylinder head, and the steel or cast iron insert I forms a supporting part for supporting the rocker arm assembly of the air distribution system to be arranged; the steel or cast iron insert I and the parts of the air distribution system (such as a rocker arm and the like) are made of steel (cast iron) materials, the thermal expansion coefficients are similar, and after the temperature of the engine is increased, the deformation of each part of the air distribution system is equivalent, so that the air valve gap between the cold and hot machines is always ensured not to be changed or to be changed slightly, and the problem of the increase of engine sound caused by the air valve gap of the cold and hot machines can be effectively solved.
Further, a steel or cast iron insert II is embedded on the cylinder head of the engine, and the steel or cast iron insert II forms a fixing part for installing the cylinder head on the cylinder body; the whole cylinder head of the engine and the upper rocker arm part can be firmly installed, the temperature rises during the working of the engine, the working stroke and the relative position of the upper rocker arm are not changed, and the problem that the sound of a gas distribution system becomes large due to the fact that the upper rocker arm is not firmly installed due to the temperature difference of a cold machine and a hot machine is avoided.
Further, the steel or cast iron insert I and the steel or cast iron insert II are integrally formed on a steel or cast iron base member, and the steel or cast iron base member is embedded in the cylinder head; the number of the steel or cast iron inserts I is five, and the steel or cast iron inserts I are distributed corresponding to the installation supporting points of the rocker arm support; the number of the steel or cast iron inserts II is four, and the four steel or cast iron inserts II are correspondingly distributed at four connection points of the cylinder head and the cylinder body; therefore, the installation fixing part of the cylinder head is combined with the supporting part to form an integral bracket structure, so that the rocker arm bracket is installed on the cylinder body through the transmission of an integrally formed steel or cast iron structure, the thermal expansion amount of the air distribution system of the cold and hot machine is controlled, the installation of the rocker arm part is fixed, the thermal expansion coefficients of the cylinder body and the cylinder head (the rigid structure of the insert) are formed as uniform as possible, the valve clearance of the cold and hot machine is controlled, and the problem of the engine sound enlargement caused by the valve clearance of the cold and hot machine is finally solved.
Further, the steel or cast iron base member extends to four fixing portions of the cylinder head to form a first connecting arm, a second connecting arm, a third connecting arm and a fourth connecting arm, and four steel or cast iron inserts II are respectively a first steel or cast iron insert II, a second steel or cast iron insert II, a third steel or cast iron insert II and a fourth steel or cast iron insert II and are integrally formed on the four connecting arms in a one-to-one correspondence manner; the five steel or cast iron inserts I are respectively a first steel or cast iron insert I, a second steel or cast iron insert I, a third steel or cast iron insert I, a fourth steel or cast iron insert I and a fifth steel or cast iron insert I; the fifth steel or cast iron insert I is integrally formed on the steel or cast iron base piece, and the first steel or cast iron insert I, the second steel or cast iron insert I, the third steel or cast iron insert I and the fourth steel or cast iron insert I are integrally formed on the four connecting arms in a one-to-one correspondence manner in a four-point connection manner; in the structure, the connecting arms formed by the steel or cast iron base pieces integrate all the steel or cast iron inserts I and the steel or cast iron inserts II, so that the rocker arm support has a stable mounting structure and is connected with the cylinder body to form a whole, the consistency of thermal deformation is ensured, two triangular mounting points can be formed by five-point mounting of the rocker arm support, the rocker arm support is effectively restrained and fixed, and the deformation and the valve operation problem caused by the deformation are avoided; meanwhile, the integrally formed connecting arm structure also plays a role of a framework for the cylinder head, has a good reinforcing effect, can reduce the use of the aluminum alloy material of the cylinder head and ensures even exceeding the expected strength.
Further, the first steel or cast iron insert I, the second steel or cast iron insert I, the third steel or cast iron insert I and the fourth steel or cast iron insert I are distributed in a trapezoid shape, wherein the first steel or cast iron insert I and the second steel or cast iron insert I are positioned at the upper bottom edge, the third steel or cast iron insert I and the fourth steel or cast iron insert I are positioned at the lower bottom edge, and the fifth steel or cast iron insert I is positioned in the trapezoid shape and is close to the lower bottom edge; the upper bottom edge is a short bottom edge, the lower bottom edge is a long bottom edge, the trapezoidal four-point distribution can meet the installation layout of the rocker arm support, and the fifth steel or cast iron insert I is arranged on the inner side of the long bottom edge, so that the further installation stability of the rocker arm support is ensured, the steel or cast iron base piece and the rocker arm support form a stable integral body, the mutually reinforcing effect is achieved, the installation strength of the rocker arm support is further ensured, and the further increase of running noise is avoided.
Further, the steel or cast iron inserts II extend downwards relative to the steel or cast iron base member for abutting installation with the engine block, and the steel or cast iron inserts I extend upwards relative to the steel or cast iron base member for supporting installation of the rocker arm bracket, so that rigid connection from the block to the rocker arm bracket is formed between the inserts, and the problem of inconsistent thermal expansion coefficients caused by an aluminum alloy cylinder head is avoided.
The invention also discloses an engine, and the engine is provided with the air distribution system.
The invention has the beneficial effects that: according to the engine gas distribution system and the engine, the timing driving gear body is in clearance fit with the crankshaft, interference force of transmission connection is borne through the shaft sleeve part, so that thermal deformation of the timing driving gear body is not constrained or influenced by thermal expansion of the crankshaft, meshing transmission performance of the gear can be prevented from being influenced by thermal expansion of the crankshaft and thermal deformation of the gear, running noise is reduced, the service cycle of the component is prolonged, normal running of the engine is guaranteed, and due to the existence of the clearance, certain transmission and meshing flexibility are provided, influence of self thermal deformation on meshing relation is counteracted, transmission smoothness of the gas distribution system is guaranteed, and overall low-noise and high-efficiency running of the engine is further guaranteed.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic view of the overall structure of an engine according to the present invention;
FIG. 2 is a timing drive gear assembly diagram;
FIG. 3 is a block diagram of a cast iron or steel insert;
FIG. 4 is a view along direction A of FIG. 3;
Fig. 5 is a top view of the cylinder head.
Detailed Description
As shown in the figure: in the engine gas distribution system of the embodiment, the timing driving gear of the gas distribution system comprises a timing driving gear body 7 and a shaft sleeve 8 (the side surface of the timing driving gear is integrally formed to extend out of the shaft sleeve and can be understood as a shaft shoulder structure) which is formed by extending along the axial direction of the timing driving gear body 7, the timing driving gear body 7 is matched with the shaft sleeve 8 sleeved on the crankshaft 6 through transmission to form transmission, and the timing driving gear body is sleeved on the crankshaft 6 in a clearance mode; in the existing design, the timing gear is directly driven (interference) and pressed on the crankshaft, and the tooth shape of the timing driving gear can deform due to interference force and cold and hot deformation, so that adverse effects such as noise generated by unsmooth operation and the like can be generated during meshing transmission, and even the normal operation of gas distribution can be influenced, so that the timing gear cannot adapt to a series of improvements such as the matching of high compression ratio and the like; in the invention, the timing driving gear is matched with the crankshaft for transmission through the shaft sleeve part, and the shaft sleeve part bears the interference force of transmission connection, so that the thermal deformation of the timing driving gear body is not constrained or influenced by the thermal expansion of the crankshaft, and the timing driving gear also has certain transmission and meshing flexibility due to the existence of a gap, and counteracts the influence of self thermal deformation on the meshing relationship, thereby ensuring the transmission smoothness of a gas distribution system and further ensuring the overall low-noise and high-efficiency operation of the engine.
In this embodiment, the timing driving gear body 7 is in interference fit with the shaft sleeve 8 sleeved on the crankshaft 6 to form transmission, so that transmission and position limitation are ensured, and the structure is simple and compact.
In this embodiment, an annular sinking groove 61 is machined at the position corresponding to the crankshaft 6 and the timing driving gear body 7, and the annular sinking groove 61 enables the timing driving gear body to be sleeved outside the crankshaft in a clearance manner; of course, the inner circle of the corresponding position of the timing driving gear body can be processed into a structure with a slightly larger diameter (larger than the matched inner diameter of the shaft sleeve), and the aim of the invention can be achieved.
In the embodiment, the rocker arm bracket of the air distribution system is arranged on the engine cylinder head, a steel or cast iron insert I is embedded on the engine cylinder head 1, and the steel or cast iron insert I forms a supporting part for supporting the rocker arm assembly of the air distribution system to be arranged; the steel or cast iron insert I and the parts of the air distribution system (such as a rocker arm and the like) are made of steel (cast iron) materials, the thermal expansion coefficients are similar, and after the temperature of the engine is increased, the deformation of each part of the air distribution system is equivalent, so that the air valve gap between the cold and hot machines is always ensured not to be changed or to be changed slightly, and the problem of the increase of engine sound caused by the air valve gap of the cold and hot machines can be effectively solved.
In the embodiment, a steel or cast iron insert II is embedded on the cylinder head of the engine, and the steel or cast iron insert II forms a fixing part for installing the cylinder head on the cylinder body; the whole cylinder head of the engine and the upper rocker arm part can be firmly installed, the temperature rises during the working of the engine, the working stroke and the relative position of the upper rocker arm are not changed, and the problem that the sound of a gas distribution system becomes large due to the fact that the upper rocker arm is not firmly installed due to the temperature difference of a cold machine and a hot machine is avoided.
In this embodiment, the steel or cast iron insert i and the steel or cast iron insert ii are integrally formed on a steel or cast iron base member a, for example, the steel or cast iron insert i and the steel or cast iron insert ii are integrally formed on a steel or cast iron base member a through corresponding connecting arms (or other connecting structures), the steel or cast iron base member a is not limited to one, and an equal structure is provided between the steel or cast iron insert i and the steel or cast iron insert ii, so as to achieve rigid connection between the steel or cast iron insert i and the steel or cast iron insert ii; the steel or cast iron base member a is embedded in the cylinder head; the number of the steel or cast iron inserts I is five, and the steel or cast iron inserts I are distributed corresponding to the installation supporting points of the rocker arm support; the number of the steel or cast iron inserts II is four, and the four steel or cast iron inserts II are correspondingly distributed at four connection points of the cylinder head and the cylinder body; when the engine is used, the steel or cast iron base piece a is embedded into the aluminum alloy cylinder head and is cast into the aluminum alloy cylinder head to form an integral rigid structure for mounting the rocker arm bracket and the cylinder head, so that the mounting and fixing part of the cylinder head is combined with the supporting part to control the thermal expansion of the air distribution system of the cold and hot machine and the mounting of the upper rocker arm part, thereby controlling the valve clearance of the cold and hot machine not to change and finally solving the problem of engine sound enlargement caused by the valve clearance of the cold and hot machine; of course, as shown in the figures, due to the different installation orientations, the steel or cast iron insert I extends upwards relative to the steel or cast iron base member a for installing the rocker arm bracket, and the steel or cast iron insert II extends downwards for installing the cylinder head and the cylinder body, and of course, the upper part of the cylinder head needs to be provided with an installation hole.
The steel or cast iron base piece extends to the four fixing parts of the cylinder head to form a first connecting arm b, a second connecting arm c, a third connecting arm d and a fourth connecting arm e, in the embodiment, the steel or cast iron insert I, the steel or cast iron insert II, the first connecting arm, the second connecting arm, the third connecting arm, the fourth connecting arm and the steel or cast iron base piece of the insert are cast and embedded in the cylinder head, so that the forming is simple and convenient, and the embedding strength is high; the four steel or cast iron inserts II are respectively a first steel or cast iron insert II 14, a second steel or cast iron insert II 16, a third steel or cast iron insert II 13 and a fourth steel or cast iron insert II 15, and are integrally formed on the four connecting arms in a one-to-one correspondence manner; the five steel or cast iron inserts I are respectively a first steel or cast iron insert I11, a second steel or cast iron insert I9, a third steel or cast iron insert I12, a fourth steel or cast iron insert I3 and a fifth steel or cast iron insert I10; the fifth steel or cast iron insert I10 is integrally formed on the steel or cast iron base piece a, and the first steel or cast iron insert I11, the second steel or cast iron insert I9, the third steel or cast iron insert I12 and the fourth steel or cast iron insert I3 are integrally formed on the four connecting arms (the first connecting arm b, the second connecting arm c, the third connecting arm d and the fourth connecting arm e) in a one-to-one correspondence manner in a four-point connection manner; in the structure, the connecting arms formed by the steel or cast iron base pieces integrate all the steel or cast iron inserts I and the steel or cast iron inserts II, so that the rocker arm support has a stable mounting structure and is connected with the cylinder body to form a whole, the consistency of thermal deformation is ensured, two triangular mounting points can be formed by five-point mounting of the rocker arm support, the rocker arm support is effectively restrained and fixed, and the deformation and the valve operation problem caused by the deformation are avoided; meanwhile, the integrally formed connecting arm structure also plays a role of a framework for the cylinder head, has a good reinforcing effect, can reduce the use of the aluminum alloy material of the cylinder head and ensures even exceeding the expected strength.
In this embodiment, the first steel or cast iron insert i 11, the second steel or cast iron insert i 9, the third steel or cast iron insert i 12, and the fourth steel or cast iron insert i 3 are distributed in a trapezoid, where the first steel or cast iron insert i and the second steel or cast iron insert i are located at the upper bottom edge, the third steel or cast iron insert i and the fourth steel or cast iron insert i are located at the lower bottom edge, and the fifth steel or cast iron insert i is located in the trapezoid and is located near the lower bottom edge; the upper bottom edge is a short bottom edge, the lower bottom edge is a long bottom edge, the trapezoidal four-point distribution can meet the installation layout of the rocker arm support, and the fifth steel or cast iron insert I is arranged on the inner side of the long bottom edge, so that the further installation stability of the rocker arm support is ensured, the steel or cast iron base piece and the rocker arm support form a stable integral body, the mutually reinforcing effect is achieved, the installation strength of the rocker arm support is further ensured, and the further increase of running noise is avoided.
In this embodiment, the steel or cast iron inserts ii (the first steel or cast iron insert ii 14, the second steel or cast iron insert ii 16, the third steel or cast iron insert ii 13 and the fourth steel or cast iron insert ii 15) extend downward relative to the steel or cast iron base member for abutting installation with the engine block, and as shown in fig. 5, the upper portion of the cylinder head is reserved with a mounting hole for mounting the steel or cast iron insert ii from the upper portion to the block; and the steel or cast iron inserts I (the first steel or cast iron insert I11, the second steel or cast iron insert I9, the third steel or cast iron insert I12, the fourth steel or cast iron insert I3 and the fifth steel or cast iron insert I10) extend upwards relative to the steel or cast iron base for supporting and installing the rocker arm bracket, so that rigid connection from the cylinder body to the rocker arm bracket is formed between the inserts, and the problem of inconsistent thermal expansion coefficients caused by an aluminum alloy cylinder head is avoided through the rigid connection.
The valve mechanism is cast in an aluminum alloy cylinder head through a steel or cast iron insert, and adopts materials with similar or identical thermal expansion coefficients with other parts of the valve mechanism, so that after the temperature of an engine is increased, the expansion amounts of all parts of the valve mechanism are equivalent, and the valve clearance between a cold engine and a hot engine is always ensured not to be changed or to be changed less, thereby solving the problem of the increase of engine sound caused by the valve clearance of the cold engine and the hot engine; meanwhile, the insert is designed with five supporting surfaces for supporting the installation of the upper rocker arm, and four fixing surfaces for supporting the installation of the cylinder head are connected into a whole to form a framework structure of the cylinder head, so that the whole cylinder head and the upper rocker arm part of the engine can be firmly installed, the strength of the cylinder head is high, when the temperature of the engine rises during operation, the working stroke and the relative position of the upper rocker arm are not or little changed, and the problem that the installation of the upper rocker arm is not firm due to the temperature difference of a cold and hot machine, so that the sound of a valve mechanism is increased is avoided; finally, the inserts control the thermal expansion of the cold and hot air distribution system and the installation of the fixed upper rocker arm parts, so that the valve clearance of the cold and hot air distribution system is ensured to meet the operation requirement, the problem of engine sound enlargement caused by the valve clearance of the cold and hot air distribution system is finally solved, meanwhile, the integral strength of the cylinder head is ensured, the use of aluminum alloy materials is reduced, the cost is saved, and the integral low-noise, economical and high-efficiency operation of the engine is ensured.
The invention also discloses an engine, and the engine is provided with the air distribution system.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (7)
1. An engine air distribution system, characterized in that: the timing driving gear of the air distribution system comprises a timing driving gear body and a shaft sleeve formed by extending along the axial direction of the timing driving gear body, the timing driving gear body is sleeved on the shaft sleeve of the crankshaft in a transmission fit manner to form transmission, the timing driving gear body is sleeved on the crankshaft in a clearance fit manner, and the timing driving gear body is sleeved on the shaft sleeve of the crankshaft in an interference transmission fit manner to form transmission; the rocker arm bracket of the air distribution system is arranged on the engine cylinder head, a steel or cast iron insert I is embedded on the engine cylinder head, and the steel or cast iron insert I forms a supporting part for supporting the rocker arm bracket of the air distribution system to be arranged;
And an annular sinking groove is processed at the corresponding position of the crankshaft and the timing driving gear body, and the annular sinking groove enables the timing driving gear body to be sleeved outside the crankshaft in a clearance manner.
2. An engine air distribution system according to claim 1, wherein: the cylinder head of the engine is embedded with a steel or cast iron insert II which forms a fixing part for mounting the cylinder head to the cylinder body.
3. The engine air distribution system according to claim 2, wherein: the steel or cast iron insert I and the steel or cast iron insert II are integrally formed on a steel or cast iron base member, and the steel or cast iron base member is embedded in the cylinder head.
4. An engine air distribution system according to claim 3, wherein: the number of the steel or cast iron inserts I is five, and the steel or cast iron inserts I are distributed corresponding to the installation supporting points of the rocker arm support; the number of the steel or cast iron inserts II is four, and the four steel or cast iron inserts II are correspondingly distributed at four connection points of the cylinder head and the cylinder body; the steel or cast iron base piece extends to four fixing parts of the cylinder head to form a first connecting arm, a second connecting arm, a third connecting arm and a fourth connecting arm, and four steel or cast iron inserts II are respectively a first steel or cast iron insert II, a second steel or cast iron insert II, a third steel or cast iron insert II and a fourth steel or cast iron insert II and are integrally formed on the four connecting arms in a one-to-one correspondence manner; the five steel or cast iron inserts I are respectively a first steel or cast iron insert I, a second steel or cast iron insert I, a third steel or cast iron insert I, a fourth steel or cast iron insert I and a fifth steel or cast iron insert I; the fifth steel or cast iron insert I is integrally formed on the steel or cast iron base piece, and the first steel or cast iron insert I, the second steel or cast iron insert I, the third steel or cast iron insert I and the fourth steel or cast iron insert I are integrally formed on the four connecting arms in a one-to-one correspondence mode in a four-point connection mode.
5. An engine air distribution system according to claim 4, wherein: the first steel or cast iron inserts I, the second steel or cast iron inserts I, the third steel or cast iron inserts I and the fourth steel or cast iron inserts I are distributed in a trapezoid shape, wherein the first steel or cast iron inserts I and the second steel or cast iron inserts I are positioned at the upper bottom edge, the third steel or cast iron inserts I and the fourth steel or cast iron inserts I are positioned at the lower bottom edge, and the fifth steel or cast iron inserts I are positioned in the trapezoid shape and are arranged close to the lower bottom edge.
6. An engine air distribution system according to claim 3, wherein: the steel or cast iron insert II extends downward relative to the steel or cast iron base for abutting installation with the engine block, and the steel or cast iron insert I extends upward relative to the steel or cast iron base for supporting installation of the rocker arm stand.
7. An engine, characterized in that: the engine is equipped with a gas distribution system according to any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810879337.2A CN109026252B (en) | 2018-08-03 | 2018-08-03 | Engine gas distribution system and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810879337.2A CN109026252B (en) | 2018-08-03 | 2018-08-03 | Engine gas distribution system and engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109026252A CN109026252A (en) | 2018-12-18 |
| CN109026252B true CN109026252B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810879337.2A Active CN109026252B (en) | 2018-08-03 | 2018-08-03 | Engine gas distribution system and engine |
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| CN (1) | CN109026252B (en) |
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| CN201377355Y (en) * | 2009-04-07 | 2010-01-06 | 广西玉柴机器股份有限公司 | Front end power output structure of crankshaft |
| CN203585200U (en) * | 2013-10-25 | 2014-05-07 | 广州汽车集团股份有限公司 | Shafting device for automobile engine crankshaft and automobile engine |
| CN108194158A (en) * | 2017-12-19 | 2018-06-22 | 玉环捷宇机械制造有限公司 | A kind of valve actuating mechanism of cam pack and processing technology and the application cam pack |
| CN208763711U (en) * | 2018-08-03 | 2019-04-19 | 重庆隆鑫发动机有限公司 | Engine valve actuating mechanism and engine |
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| JPH0893488A (en) * | 1994-09-26 | 1996-04-09 | Ishikawajima Harima Heavy Ind Co Ltd | Fitting and fixing structure of timing gear relative to rotor shaft of supercharger |
| CN2718231Y (en) * | 2004-07-16 | 2005-08-17 | 吴子广 | Inserting casting silencing cylinder head for motorcycle engine |
| CN201269144Y (en) * | 2008-10-22 | 2009-07-08 | 李云 | Bi-metal bias-wearing resistant silencing cylinder head of motorcycle |
| CN201377355Y (en) * | 2009-04-07 | 2010-01-06 | 广西玉柴机器股份有限公司 | Front end power output structure of crankshaft |
| CN203585200U (en) * | 2013-10-25 | 2014-05-07 | 广州汽车集团股份有限公司 | Shafting device for automobile engine crankshaft and automobile engine |
| CN108194158A (en) * | 2017-12-19 | 2018-06-22 | 玉环捷宇机械制造有限公司 | A kind of valve actuating mechanism of cam pack and processing technology and the application cam pack |
| CN208763711U (en) * | 2018-08-03 | 2019-04-19 | 重庆隆鑫发动机有限公司 | Engine valve actuating mechanism and engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109026252A (en) | 2018-12-18 |
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