一种发动机正时齿轮系及燃气发动机
By incorporating multiple oil pump gears in the engine timing gear system and employing a radial force cancellation design, the problems of insufficient oil supply and wear of the oil pump gears are solved, achieving stable lubrication and meeting the lubrication needs of large engines, and reducing the risk of engine damage due to insufficient oil.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU XINSHENGPU POWER TECHNOLOGY CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-17
AI Technical Summary
In existing timing gear systems, the oil pump gear drives the oil pump with limited oil supply, which cannot meet the lubrication needs of large engines. Furthermore, the radial relative force between the oil pump gear and the transmission idler gear leads to accelerated wear and affects the lubrication effect.
Design an engine timing gear system in which multiple oil pump gears are distributed on different sides of the oil pump idler wheel. By symmetrical arrangement and radial force cancellation design, the radial force of the oil pump gears during movement is reduced or eliminated, and the oil supply is increased by supplying oil to multiple oil pump gears simultaneously.
It effectively reduces wear between the oil pump gear and the oil pump idler wheel, ensures the stability of oil pump supply, improves lubrication effect, is suitable for the lubrication needs of large engines, and maintains normal oil supply when some oil pumps fail, preventing engine damage due to lack of oil.
Smart Images
Figure CN224515249U_ABST
Abstract
Claims
1. An engine timing gear train, characterized by, It includes a drive gear (1), an oil pump idler gear (2) meshing with the drive gear (1), and a plurality of oil pump gears (3) meshing with the oil pump idler gear (2); each oil pump gear (3) is connected to an oil pump, and each oil pump gear (3) receives power transmitted by the drive gear (1) through the oil pump idler gear (2) to drive the oil pump to supply oil; The plurality of oil pump gears (3) are distributed on different sides of the oil pump idler wheel (2), and the radial forces between the plurality of oil pump gears (3) and the oil pump idler wheel (2) are partially or completely canceled out.
2. The engine timing gear train of claim 1, wherein, Two oil pump gears (3) are provided, and the two oil pump gears (3) are symmetrically arranged with respect to a symmetry axis (4); the symmetry axis (4) is parallel to the center line connecting the oil pump gears (3) and the driving gear (1); the center line connecting the two oil pump gears (3) is perpendicular to the symmetry axis (4); the radial forces between the two oil pump gears (3) and the oil pump idler gear (2) are partially or completely canceled out.
3. The engine timing gear train of claim 1, wherein, The drive gear (1) and the oil pump gear (3) are distributed on opposite sides of the oil pump idler wheel (2); the radial forces of the drive gear (1) and the oil pump idler wheel (2) and the radial forces of the oil pump gear (3) and the oil pump idler wheel (2) partially or completely cancel each other out.
4. The engine timing gear train of claim 1, wherein, The driving gear (1) is a crankshaft gear; and / or, the driving gear (1) is a helical gear structure.
5. The engine timing gear train of claim 1, wherein, It also includes a camshaft gear (5) and a transmission assembly (7) connecting the drive gear (1) and the camshaft gear (5). The transmission assembly (7) includes a double gear (71) meshing with the drive gear (1) and a cam idler gear (6) meshing with the camshaft gear (5). The double gear (71) includes a first gear section (711) and a second gear section (712) that are relatively fixed. The first gear section (711) is used to mesh with the driving gear (1), and the second gear section (712) is used to mesh with the cam idler wheel (6). The first gear section (711) and the second gear section (712) have different numbers of teeth.
6. The engine timing gear train of claim 5, wherein, The double gear (71) is mounted on a rotating shaft (713), and a bearing (62) is connected to the rotating shaft (713). The bearing (62) on the rotating shaft (713) is spaced apart from the cam idler wheel (6). The rotating shaft (713) is provided with a first oil passage (714), which connects to the outside world and the mating point between the rotating shaft (713) and the double gear (71). The first oil passage (714) is used to supply oil to the mating point between the rotating shaft (713) and the double gear (71) so that the rotating shaft (713) can be separated from the double gear (71).
7. The engine timing gear train of claim 5, wherein, The cam idler wheel (6) is connected to a mounting shaft (61), the mounting shaft (61) is interference-fitted with the cam idler wheel (6), and a bearing (62) is connected to the mounting shaft (61). The bearing (62) on the mounting shaft (61) is spaced apart from the cam idler wheel (6). The mounting shaft (61) is provided with a second oil passage (611), which connects to the outside world and the mating point between the mounting shaft (61) and the cam idler wheel (6). The second oil passage (611) is used to supply oil to the mating point between the mounting shaft (61) and the cam idler wheel (6) so that the mounting shaft (61) can be separated from the cam idler wheel (6).
8. A gas engine, characterized in that include: The engine timing gear system as described in any one of claims 1 to 7; The crankshaft (200) is interference-fitted with the drive gear (1) of the engine timing gear system and is used to drive the drive gear (1) to rotate.
9. The gas engine according to claim 8, characterized in that The crankshaft (200) is provided with a third oil passage (201), which connects to the outside world and the mating point between the crankshaft (200) and the drive gear (1). The third oil passage (201) is used to supply oil to the mating point between the crankshaft (200) and the drive gear (1) so that the crankshaft (200) can be separated from the drive gear (1).
10. The gas engine of claim 8, characterized in that It also includes a camshaft (300), the engine timing gear system includes a camshaft gear (5), and the camshaft (300) and the camshaft gear (5) are connected by bolts (301); The camshaft gear (5) is provided with a mounting hole (302), the bolt (301) passes through the mounting hole (302) and is threadedly connected to the camshaft (300), and a one-way gap of at least 2 mm is formed between the bolt (301) and the wall forming the mounting hole (302).